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Long Phu 1 Thermal Power Plant EIAFeasibility Study

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TABLE OF CONTENTS

PREFACE ..................................................................................................... 0-1CHAPTER 1: PROJECT DESCRIPTION................................................. 1-11.1 PROJECT NAME.................................................................................... 1-11.2 INVESTOR ............................................................................................. 1-11.3 PROJECT LOCATION ........................................................................... 1-11.4 SCOPE OF THE PROJECT..................................................................... 1-41.5 PROJECT DESCRIPTION ...................................................................... 1-4

1.5.1 Technology of the plant................................................................. 1-41.5.2 Operation process.......................................................................... 1-51.5.3 Main items of the project............................................................... 1-71.5.4 Auxiliary items and equipments .................................................... 1-81.5.5 Water supply source .................................................................... 1-101.5.6 Source and supply system of fuel ................................................ 1-111.5.7 Ash removal system .................................................................... 1-141.5.8 Stacks of the plant ....................................................................... 1-141.5.9 Exhaust gas treatment system (dust and SO2).............................. 1-151.5.10 Gypsum transportation system..................................................... 1-161.5.11 Power system of the power plant ................................................. 1-171.5.12 Communication & SCADA system ............................................. 1-171.5.13 Control and Instrumentation system (DCS) ................................. 1-171.5.14 Ventilation and air conditioning system....................................... 1-171.5.15 Fire fighting system..................................................................... 1-181.5.16 Internal road system .................................................................... 1-181.5.17 Drainage system.......................................................................... 1-181.5.18 Waste treatment system and monitoring system .......................... 1-181.5.19 Landscape and planting ............................................................... 1-181.5.20 Compensation and resettlement ................................................... 1-191.5.21 Construction arrangement............................................................ 1-191.5.22 Total investment cost................................................................... 1-211.5.23 Project implementation................................................................ 1-211.5.24 Schedule of the project ................................................................ 1-22


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CHAPTER 2: PHYSICAL, ENVIRONMENTAL AND SOCIO-ECONOMIC CONDITIONS ........................................................................ 2-12.1 PHYSICAL AND ENVIRONMENT CONDITIONS .............................. 2-1

2.1.1 Physical conditions........................................................................ 2-12.1.2 Environmental quality status ......................................................... 2-62.1.3 Organism resource status............................................................. 2-142.1.4 Natural resources......................................................................... 2-31

2.2 SOCIO-ECONOMIC CONDITIONS .................................................... 2-322.2.1 Social status of the project area ................................................... 2-322.2.2 Economic status of the project area ............................................. 2-35

CHAPTER 3: ENVIRONMENTAL IMPACT ASSESSMENT ................ 3-13.1 IMPACT ASSESSMENT ........................................................................ 3-1

3.1.1 Impact sources............................................................................... 3-13.1.2 Impacted objects............................................................................ 3-53.1.3 Risks and problems ..................................................................... 3-54

3.2 COMMENTS ON DETAIL AND CONFIDENCE OF ASSESSMENTS3-59

CHAPTER 4: MEASURES FOR MITIGATING ADVERSE IMPACTSAND PREVENTING ENVIRONMENTAL PROBLEMS .......................... 4-14.1 FOR ADVERSE IMPACTS .................................................................... 4-1

4.1.1 Mitigation measures related to waste............................................. 4-14.1.2 Mitigation measures no related to waste ...................................... 4-20

4.2 FOR ENVIRONMENTAL PROBLEMS ............................................... 4-224.2.1 Measures of preventing and treating environmental problems in the

construction phase ....................................................................... 4-224.2.2 Measures of preventing and treating environmental problems in the

operation phase ........................................................................... 4-24CHAPTER 5: ENVIRONMENTAL MONITORING ANDMANAGEMENT PLAN................................................................................ 5-15.1 ENVIRONMENTAL MANAGEMENT PLAN ....................................... 5-1

5.1.1 Organization structure ................................................................... 5-15.1.2 Established specialized department of environmental protection at

PMB and Long Phu 1 thermal power project ................................. 5-25.1.3 Environmental management and reporting system......................... 5-25.1.4 Training and capacity improvement of environmental management

for officials and operation workers ................................................ 5-35.1.5 Enironmental management plan .................................................... 5-4


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5.2 ENVIRONMENTAL MONITORING PLAN ........................................ 5-145.2.1 Monitoring waste ........................................................................ 5-145.2.2 Monitoring ambient environment ................................................ 5-165.2.3 Other monitoring......................................................................... 5-215.2.4 Estimated cost of environmental monitoring ............................... 5-21

5.3 LIST OF ENVIRONMENTAL TREATMENT WORKS, COST ANDSCHEDULE .......................................................................................... 5-23

CHAPTER 6: PUBLIC CONSULTATION................................................. 6-16.1 COMMENTS OF COMMUNE PEOPLE’S COMMITTEE ..................... 6-16.2 COMMENTS OF COMMUNE FATHERLAND FRONT COMMITTEE6-16.3 PUBLIC CONSULTATION .................................................................... 6-26.4 INVESTOR’S COMMITMENT TO COMMUNE PEOPLE’S

COMMITTEE AND FATHERLAND FRONT COMMITTEE................ 6-4

CONCLUSION AND PROPOSITION......................................................... 7-1


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LIST OF ABBREVIATIONS

APH : Air preheater

BOD : Biochemical Oxygen Demand

BMCR : Boiler Maximum Continious Rate

COD : Chemical Oxygen Demand

DO : Distillated oil

DONRE : Department of Natural Resources and Environment

DWT : Deadweight tonnage

EIA : Environmental impact assessment

EPA : United States Environmental Protection Agency

ESP : Electrostatic Precipitator

FGD : Flue Gas Desulfurization

FS : Feasibility Study

HCM : HoChiMinh

Ltd. : Limited

OFA : Over fire air

PAH : Project affected household

PAP : Project affected person

PECC3 : Power Engineering & Consulting Joint-Stock Company No.3

PMB : Project Management Board

RO : Reverse Osmosis

TDS : Total disolved solids

TPP : Thermal Power Plant

VND : Vietnamese Dong

VOC : Volatile organic compounds

WHO : World Health Organization


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LIST OF TABLES

Table 1-1 : Basic characteristics of coalTable 1-2 : Characteristics of DOTable 1-3 : Power demand for construction workTable 1-4 : Schedule of the projectTable 2-1 : Summary table of environmental temperature from 1979 to 2007Table 2-2 : Hours of sunlight per yearTable 2-3 : Relative humidity per yearTable 2-4 : Monthly average rainfallTable 2-5 : Pasquill classification of atmospheric stabilityTable 2-6 : Analysis results for surface water qualityTable 2-7 : Analysis results for underground water qualityTable 2-8 : Analysis results for soil qualityTable 2-9 : Analysis results for air qualityTable 2-10 : Composition structure of phytoplanktonTable 2-11 : Density and dominant species of phytoplankton in the research

areaTable 2-12 : Biodiversity index of phytoplanktonTable 2-13 : Composition of zooplankton in the research areaTable 2-14 : Density and dominant species of zooplankton in the research areaTable 2-15 : Biodiversity index of zooplanktonTable 2-16 : Composition of benthic macroinvertebrates in the research areaTable 2-17 : Density and dominant species in each sampling siteTable 2-18 : Biodiversity index of ZoobenthosTable 2-19 : List species of fish were recorded in the Long Phu 1 Thermal

Power plant in 12-2007Table 2-20 : Composition of plantTable 2-21 : The flora of the proposed project areaTable 2-22 : Existing landuse in project area – Long Duc communeTable 3-1 : Impact sources related to wasteTable 3-2 : Impact sources no related to wasteTable 3-3 : Volume of excavation and fill for constructionTable 3-4 : Dust emission coefficients


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Table 3-5 : Emission coefficient of air pollutantsTable 3-6 : Noise from construction machinesTable 3-7 : Concentration of pollutants in domestic wastewaterTable 3-8 : Summarization of applied standards on exhaust gas (mg/Nm3)Table 3-9 : Standard on ambient air quality (TCVN 5937:2005)Table 3-10 : Parameters used for calculation of emission rate of pollutantsTable 3-11 : Emission rate and concentration of pollutants in exhaust gasTable 3-12 : Efficiency of dust and sulfur removal systemTable 3-13 : Input parameters of air dispersion modeling softwareTable 3-14 : Calculated results of air pollutants dispersion model of Long Phu

1 TPP by stack heightTable 3-15 : Calculated results of air dispersion model of Long Phu 1 TPPTable 3-16 : Emission coefficient by DO burningTable 3-17 : Pollutants concentration caused by DO burning for startingTable 3-18 : Characteristics of bottom ash removal technologiesTable 3-19 : Components of ashTable 3-20 : Emission rate of pollutants due to transportationTable 3-21 : Noise level in some areas in Pha Lai TPPTable 3-22 : Waste water types of the power plantTable 3-23 : Heat transfer distribution when river tide rises to tide topTable 3-24 : Heat transfer distribution when river tide rises from tide bottom to

zeroTable 3-25 : Environmental matrixTable 4-1 : Efficiency of dust and sulfur removal systemTable 5-1 : Organization structureTable 5-2 : Environmental reporting systemTable 5-3 : Cost of capacity improvement program for safety and

environmental protectionTable 5-4 : Environmental management planTable 5-5 : Monitoring wasteTable 5-6 : Monitoring ambient environmentTable 5-7 : List of environmental treatment works, cost and scheduleTable 6-1 : Public consultation


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LIST OF FIGURES

Figure 1-1 : Location of Long Phu 1 Thermal Power PlantFigure 1-2 : Operation processFigure 1-3 : Layout of Long Phu – Soc Trang Thermal ComplexFigure 1-4 : Layout of Long Phu 1 Thermal Power PlantFigure 2-1 : Hydrological regime of hau river at Dai NgaiFigure 2-2 : Sampling positions of surface water, underground water and soilFigure 2-3 : Sampling positions of air qualityFigure 2-4 : Sampling positions of aquatic organismFigure 2-5 : Composition structure of zooplankton in the research areaFigure 2-6 : Variation of density among sitesFigure 2-7 : Percent of benthic macroinvertebrates in research areaFigure 2-8 : Percent of dominant species per total individuals in each siteFigure 2-9 : Structure of main vegetationFigure 2-10 : Map of vegetationFigure 3-1 : Windrose in the project area, January (from 1979 – 2005)Figure 3-2 : Windrose in the project area, August (from 1979 – 2005)Figure 3-3 : System of cartesian coordinate axes for air dispersion modelFigure 3-4 : Contour map of 1-hr average dust concentration of Long Phu 1

TPP on dry season (January)Figure 3-5 : Contour map of 1-hr average dust concentration of Long Phu 1

TPP on rainy season (August)Figure 3-6 : Contour map of 24-hrs average dust concentration of Long Phu

1 TPP on dry season (January)Figure 3-7 : Contour map of 24-hrs average dust concentration of Long Phu

1 TPP on rainy season (August)

Figure 3-8 : Contour map of 1-hr average SO2 concentration of Long Phu 1TPP on dry season (January)

Figure 3-9 : Contour map of 1-hr average SO2 concentration of Long Phu 1TPP on rainy season (August)

Figure 3-10 : Contour map of 24-hrs average SO2 concentration of Long Phu1 TPP on dry season (January)

Figure 3-11 : Contour map of 24-hrs average SO2 concentration of Long Phu1 TPP on rainy season (August)

Figure 3-12 : Contour map of 1-hr average NOx concentration of Long Phu 1TPP on dry season (January)


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Figure 3-13 : Contour map of 1-hr average NOx concentration of Long Phu 1TPP on rainy season (August)

Figure 3-14 : Contour map of 24-hrs average NOx concentration of Long Phu1 TPP on dry season (January)

Figure 3-15 : Contour map of 24-hrs average NOx concentration of Long Phu1 TPP on rainy season (August)

Figure 3-16 : Contour map of 1-hr average CO concentration of Long Phu 1TPP on dry season (January)

Figure 3-17 : Contour map of 1-hr average CO concentration of Long Phu 1TPP on rainy season (August)

Figure 3-18 : Contour map of 24-hrs average CO concentration of Long Phu1 TPP on dry season (January)

Figure 3-19 : Contour map of 24-hrs average CO concentration of Long Phu1 TPP on rainy season (August)

Figure 3-20 : Calculation girdFigure 3-21 : Contour line on temperature when river tide rises to tide topFigure 3-22 : Temperature section when river tide rises to tide topFigure 3-23 : Contour line on temperature when river tide rises from tide

bottom to zeroFigure 3-24 : Temperature section when river tide rises from tide bottom to zeroFigure 3-25 : Existing and proposed protected areas in the project areaFigure 3-26 : Affected communal house in Thanh Duc hamletFigure 4-1 : Diagram of oil-contained rainwater treatment processFigure 4-2 : Treatment waste water from ash discharge systemFigure 4-3 : The septic tank with 3 partitionsFigure 4-4 : Domestic waste water treatment systemFigure 4-5 : Coal-contained waste water treatment systemFigure 4-6 : Diagram of oil-contained rainwater treatment processFigure 4-7 : Waste water treatment from supply water treatment system, gas

treatment system and washing boilerFigure 4-8 : Waste water treatment system of the plantFigure 4-9 : Layout of waste water treatment systemFigure 5-1 : Sampling positions of monitoring wasteFigure 5-2 : Sampling positions of monitoring embient environment in

construction phaseFigure 5-3 : Sampling positions of monitoring embient environment in

operation phase


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PREFACE

1. INTRODUCTION

Recent years, resulting from the economic renovation, Vietnamese economyhas grown strongly. Living standard has been increased. Vietnamese economyhas on its way to integrate into the economy of the region and of the world.Electricity demand has also increased along with this process. Statistical datain the Master Plan VI show that during period of 2000-2005, national poweroutput increased 15.27%, from 22,404GWh in 2000 up to 45,603GWh in2005.In order to meet the power demand, Vietnam Electricity (EVN) has to hastenconstruction progress of power plants and grids. Further EVN has also had aplan to reasonably balance power capacity at each region, to ensure thereliability of power supply. The development of thermal power plants near theload center has high priority to reduce the transmission of power through along distance. Thermal power plants should be developed, in which the coal-fired thermal power plants should have high priority to increase the initiativeand safety in fuel supply.Long Phu 1 thermal power plant project is one of three projects of Long Phu –Soc Trang Power Complex.Total capacity of Long Phu – Soc Trang Power Complex is 4,400 MW,including Long Phu 1 (1,200 MW), Long Phu 2 (1,200 MW) and Long Phu 3(2,000 MW). Master plan of the Long Phu – Soc Trang Power Complex wasapproved by Minitry of Industry and Trade in Decree No.1233/QD-BCT dated23/10/2007.Fesibility Study report of Long Phu 1 thermal power plant project is carriedout by Long Phu – Song Hau Petro-Power Project Management Board, andwill be considered and approved by Minitry of Industry and Trade.

2. LEGAL BASIS AND TECHNICAL BASIS OF EIA PREPARATION

Regulated documents:Research into this EIA relies on regulated texts below:

+ Law of environment protection No.52/2005/QH11 dated 29/11/2005 ofSocialist Republic of Vietnam approved by Nation Assembly;

+ Law of Standard and technical norm of Socialist Republic of Vietnam No.68/2005/QH11 dated 26/06/2006 of Nation Assembly;

+ Decree No.80/2006/ND-CP dated 9/8/2006 of Government on guidancedetails of articles of Law of environmental protection;

+ Decree No.81/2006/ND-CP dated 09/8/2006 of Government on pecuniarypenalty in Environment protection;


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+ Decree No.81/2007/ND-CP dated 23/05/2007 of Government on regulatingto holding and technical staff to environmental protection in state and stateenterprise;

+ Decree No.21/2008/ND-CP dated 28/02/2008 of Government onadjustment and supplementation decree No.80/2006/ND-CP date 9/8/2006of Government about guiding details of articled of Law of environmentalprotection;

+ Decree No.140/2006/ND-CP dated 22/11/2006 of the Government onregulating environmental protection in establishment, appraisal, approvaland implementation of strategy, planning , plans, programs anddevelopment projects;

+ Decree No.59/2007/ND-CP dated 09/04/2007 of Government on managingsolid waste;

+ Circular No.05/2008/TT-BTNMT dated 08/12/2008 of Ministry of NaturalResources and Environment on guidance strategic environmentalassessment, environmental impact assessment and environmentalprotection commitment;

+ Circular No.06/2007/TT-BKH of Ministry of Planning & InvestmentPortal dated 27/08/2007 on guidance of implementing the DecreeNo.140/2006/ND-CP dated 22/11/2006 of the Government;

+ Circular No.12/2006/TT-BTNMT of Ministry of Natural Resources andEnvironment on guiding practicing conditions and formality records,registration, licensing practice, and code of Hazardous waste;

+ Decision No.1195/QD-TTg date 09/11/2005 of Minister of Government onregulating structures, specific policy to invest construct urgent electricalproject in 2006-2010 period;

+ Decision No.110/2007QD-TTg dated 18/07/2007 of Minister ofGovernment on approval of development planning national power period2006-2015 with examining to year 2025;

+ Decision No.1233/QD-BTC dated 23/10/2007 of Ministry of Industry andTrade on approval general planning of Long Phu – Soc Trang PowerComplex;

+ Decision No.23/2006/QD-BTNMT on promulgating the list of hazardouswaste matter and Circular No.12/2006/TT-BTNMT of Ministry of NaturalResources and Environment about managing hazardous waste matter;

+ Decision No.22/2006/QD-BTNMT on applying Vietnamese environmentalstandard;

+ Decision No.35/2002/QD-BTNMT dated 25/06/2002 of Ministry ofNatural Resources and Environment on publishing list of Vietnameseenvironmental standards required to apply;


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+ Decision No.04/2008/QD-BTNMT dated 18/07/2008 on promulgatingNational technical regulations on environment;

+ Decision No.16/2008/QD-BTNMT dated 31/12/2008 on promulgatingNational technical regulations on environment;

+ Decision No.1793/QD-BTNMT dated 20/09/2005 on promulgating andDecision No.07/2005/QD-BTNMT about compelling to apply TCVN7440:2005 standard.

Environmental standards applied+ This report used current Environmental standard of Viet Nam that regulate

in Decision No.22 & 23/QD-BTNMT of Ministry of Natural Resourcesand Environment:

- TCVN 5937:2005 – Air quality – Ambient air quanlity standards.- TCVN 5938:2005 - Air quality – Maximum allowable

concentration of hazardous substances in ambient air.- TCVN 5939:2005 - Air quality – Industrial emission standards –

Inorganic substances and dusts..- TCVN 5945:2005 – Industrial waste water – Discharge standards.

+ Environmental standard for thermal power industry – air quality –Emission standards for thermal power industry TCVN 7440: 2005; inDecision No. 1793/QD-BTNMT.

+ National technical regulations on environment are stipulated in DecisionNo.04/2008/QD-BTNMT dated 18/07/2008 and No.16/2008/QD-BTNMTdated 31/12/2008 BTNMT of Ministry of Natural Resources andEnvironment:

- QCVN 09:2008/BTNMT - National technical regulation onunderground water quality.

- QCVN 08:2008/BTNMT - National technical regulation onsurface water quality.

- QCVN 14:2008/BTNMT - National technical regulation ondomestic waste water.

Technical documents of EIAReference document:- The environmental status report of the Department of Resources and

Environment of Soc Trang Province;- Statistics yearbook in 2008 of Soc Trang province;- Statistics yearbook in 2008 of Long Phu district;- Socio-economic Report in 2008 of Long Duc commune People’s

Committee;- Meteorological and hydrographic data of Dai Ngai, Soc Trang stations;


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- Guidelines for EIA of TPP – Department of Natural Resources andEnvironment, 1999;

- Research report of typical industrial solid waste treatment technology,9/2000 – Environmental Faculty – Ho Chi Minh City PolytechnicUniversity;

- Air pollution and exhaust gas treatment, Volume No.1, Science andTechnology publisher, Pro.Dr. Tran Ngoc Chan, 2000;

- Waste water treatment, by Hoang Hue, 2002;- Assessment of Sources of Air, Water, and Land Pollution, WHO, 1993;- Air Pollution control engineering, Noel de Nevers, second edition,

McGraw-Hill, Inc, 1995;- Standard of methods for the examination of water and waste water, 15th

edition, 1981.- EPA AERMOD Model Formulations United States Environmental

Protection Agency, Sep. 2004.Project author documents:- General planning Report of Long Phu – Soc Trang coal-fired thermal power

complex , PECC3, Dec. 2007.- Feasibility study report of Long Phu 1 thermal power plant project, PECC3,

Mar. 2008.- Topography and geology report of Long Phu 1 thermal power plant project,

PECC3, Dec. 2007.- Report on heat spread simulation along the river by cooling waste water

from Long Phu 1 power plant, Institute of Applied Mechanics of Ho ChiMinh City, Dec. 2007.

- Report on environmental status in project area, Institute of TropicalBiology, Dec. 2007

3. APPLIED METHODS IN EIA

Content and implementation this environmental impact report with Decree80/2006/ND-CP dated 9/8/2006, Decree 21/2008/ND-CP dated 28 / 02/2008and Circular 05/2008/TT-BTNMT dated 08/12/2008 of Ministry of NaturalResources and Environment.Environmental impact study of the project based on the technical methodsbelow:- Field surveyField survey is done to collecting environmental quality samples, data, toobserve existing environmental and socio-economic conditions.- Laboratory methods


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Analyzing collected environmental quality samples in order to basedenvironment field assessment.- ComparisonBased on site surveyed results, analysed results in laboratory and calculatedresults are compared with Vietnamese standard to define environment qualityat the project area.- StatisticsUsing statistics methods are collected and classified field figures about naturalconditions, sociology survey data in leader interviewing processing and localcitizen.- Map methodUsing maps define project position, scale and affected level.- Rapid assessmentRapid assessment method of World Health Organization, (WHO) proposes, isapplied in these cases, as:

+ Assessing tonnage waste-air pollution and wastewater of factory;

+ Assessing effectiveness of pollution prevention methods.- Environment modelingModeling methods were applied to reproducing of pollution dispersingprocessing from source to surround. Applied models as:

+ Calculated and forecasted air pollution level from factory exhaust fumes(fuel, ability pollution treatment, chimney characteristics, chimneyheight in conditions being affected of changing climate and terrain)To evaluate the forecast exhaust gas, the project use software BreezeAERMOD GIS Pro. This software which is written by Trinity Companybased on AERMOD model of U.S.Environmental Protection Agency(EPA) is proposed to use to calculate and predict progress of emissionpollutants in the air. AERMOD model replaced ISC3 (Industrial SourceComplex Model) of EPA (1995), calculates concentration of pollutantsand deposit range from waste industrial complex sources.

+ Calculated and forecasted ability dispersing of temperature by leavingwater from the plant to Hau river;To calculate and simulate dispersal of temperature cooling water of LongPhu 1 power plant on Hau River is done by Institute Applied Mechanicsof Ho Chi Minh, using model SW-FAST2D (Surface Water Flow AndSolute Transport in 2 Dimensions), in which used methods limitedvolume to determine a value of the heat flow.

4. ORGANIZATIONS OF EIA IMPLEMENTATION

Investor: Long Phu – Song Hau Petro-Power Project Management Broad


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represents Petrovietnam Corporation and presides to make EIA report.Consulting Agency: Power Engineering & Consulting Joint-Stock CompanyNo.3 (PECC3) (General Director: Mr.Thai Tuan Tai, address: No.32 Ngo ThoiNhiem street, district 3, HCM City).With the participation of some organizations follow:

+ Institute of Applied Mechanics of Ho Chi Minh (Institute of NationalApplied Mechanics) (President: Mr. Nguyen Cao Menh, address: No.291

ien Bien Phu street, ward 7, District 3, HCM City);

+ Institute of Tropical Biology (President: Mr. Hoang Nghia Son,address: No.85 Tran Quoc Toan street, district 3, HCM City).

Participation of local office:

+ Soc Trang province Department of Environment and Resources.

+ Long Phu District People’s Committee

+ Long Duc Commune People’s Committee.Participation of personal, organization:

+ Ms Duong Thi Thanh Truc - Director of Information Techology &Environment Department, PECC3;

+ Mr. Nguyen Thai Vu - Deputy Direcor of Information Techology &Environment Department, PECC3;

+ Eng. Le Thi Ngoc Xuan - Information Techology & EnvironmentDepartment, PECC3;

+ Mr.Do Trung Kien - Information Techology & Environment Department,PECC3;

+ Chief author: Mr. Nguyen Nhu Hoang Tuan - Director of Power PlantProject Department, PECC3;

+ Mr. Le Anh Thong - Deputy Chief of Long Phu – Song Hau Petro-PowerProject Management Board;

+ Mr. Hoang Van Thach - Deputy Chief of Safe Health Environment Board -PetroVietnam;

+ Mr. Ta Quang Huy - Safe Health Environment Board - PetroVietnam;

+ Mr. Nguyen Phi Khu - Head of Sea mechanics & Environment Department- Applied Mechanics Academy;

+ Ms Do Thi Bich Loc - Deputy head of Technical & EnvironmentManagement - Resource Environment Science & Technical Academy;

+ Mr. Huynh Tien Dat – Deputy Director - Institute of Technical and Scienceon Resources and Enviroment Management;

+ Environmental ecological experts of Institute of Tropical Biology:


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⋅ Ph m Thanh Luu – specializing in plant plankton

⋅ Ph m Doan ang – specializing in zooplankton

⋅ Ngo Xuan Quang – specializing in bottom animal

⋅ Nguyen Xuan ong – specializing in fish, shrimp

⋅ Nguyen Luu Phuong – specializing in phytology

⋅ ao Thi Thu Ha – specializing in soil and water chemistryEIA is done in parallel with feasibility study of Long Phu 1 power plant.Calculated and studied results by the experts were exchanged continuouslywith each other and had reciprocal influences.


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CH NG 1CHAPTER 1: PROJECT DESCRIPTION

1.1 PROJECT NAME

Long Phu 1 Thermal Power Plant.Capacity is 1,200MW.

1.2 INVESTOR

Investor : PetroVietnamGeneral Director : Mr. Tran Ngoc CanhAddress : 18, Lang Ha Street, Ba Dinh District, Ha Noi CityTelephone : 04-38252526, 04-37725761Fax : 04-38265942, 04-37725903

Project Owner : Long Phu – Song Hau Petro-Power ProjectManagement Board

Address : Long Duc commune, Long Phu district, Soc Trangprovince.

Chief of Board : Mr. Ho Cong KyTelephone : 079-3713333Fax : 079-3713444

Consulting Agency : Power Engineering & Consulting Joint-StockCompany No.3

General Director : Mr. Thai Tuan TaiAddress : 32 Ngo Thoi Nhiem Street, Dist. 3, Ho Chi Minh

CityTelephone : (08) 22110 360Fax : (08) 22210 758

1.3 PROJECT LOCATION

Long Phu 1 power plant locates at Long Phu - Soc Trang Power Complexbelonging to Thanh Duc and Loi Duc hamlets, Long Duc commune, LongPhu district, Soc Trang province. Geographical position of the Complex is9o4’23.9” – 9o43’37.6” North latitude and 106o4’36,88” – 106o5’38,4” Eastlongitude.The project is located on right shore of the Hau River, far away Dai Ngairivulet 1.3 km toward downstream and and Soc Trang city in the East. InNorth and East sides, it borders on Hau River, the West borders oncommune’s road and about 1km far away Dai Ngai rivulet the South. Project


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area has natural level from 0.6 m to 1.5 m, is not submerged, planted mainlyrice, nipa, sugar-cane and other trees for timber. Since this is the landaffected by salty water in dry season, so cultivation productivity is often nothigh.Long Phu Power Complex area is approximately 386.88 hectares, enough for3 plants with a total capacity of 4400 MW. Each plant has a separate coalstore to ensure 30 operation days with full load and ash disposal area forwhole the Power Complex is about 120 hectares. A port system is alsodesigned to receive coal, oil, limestone and equipments.Plant location is in figure 1-1.

Long Phu 1 Thermal Power Plant EIA Feasibility Study

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Figure 1-1a Location of Long Phu 1 Thermal Power Plant


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1.4 SCOPE OF THE PROJECT

Long Phu 1 power plant with an area of 184ha is constructed after finishingLong Phu Power Complex infrastructure project, scope of the Long Phu 1 is asfollows:- The main items of Long Phu 1 power plant: 2x600MW units with

conventional technology, once through pulverized coal fired boiler withreheat, super steam pressure, advanced combustion technology (low NOxburner), equipments such as ESP, FGD will be installed to satisfyenvironmental requirements.

- Auxiliary systems: storage and supply systems of coal, oil, limestone,gypsum, ash discharge system, ash disposal area, cooling water system,fresh water supply system, waste water treatment system,

- Electric system of the power plant, 220kV/500kV switchyard system.- Specialized port for importing materials and exporting by-products of the

power plant.According to Document No. 65/VNB-PTTH dated 19/04/2009 ofPetroVietnam, following items belong to Long Phu Power Complexinfrastructure project which are not included in Long Phu 1 power plantproject- Compensation and clearance for the whole power complex area;- Disarming bomb;- Leveling, banking around the power complex area, temporary fence;- Relocation a part of the Dai Ngai – Tran De 110kV transmission line;- Relocation a part of the Nam Song Hau road and access road to the Power

Complex;- Housing for operation management staffs, project management board

office;- Electricity for construction activities;- Water for construction activities;- Coal residue disposal area.

1.5 PROJECT DESCRIPTION

1.5.1 Technology of the plant

Long Phu 1 power plant project is designed with capacity of 1.200MW,including 2 units (2x600MW).a) Boiler type: pulverized-coal-fired boiler technology;b) Steam parameters: pressure super critical 250bar - 285bar, temperature


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high pressure / return baking gas at 540-600OC/560-620OCc) Main fuel: imported steam coal. Coal sources will import from Australia or

Indonesia with high calorific value GCV of 25.5 to 26.4 MJ/kg (6,100 -6,300 Kcal /kg);

d) Ash slag process technology: expecting direct consumption of fly dryingash to make addition agent in concrete and cement factories. In planning,ash slag yard have been designed backup measure that if in first stage, ashslag cannot be consumed or the ash slag treatment system has a problem;

e) Schedule: operation time of the frist turbine unit: July 2013 and the secondone: January 2014 (by FS report, Oct. 2008).

1.5.2 Operation process

Operation process of the project is showed as following figure.

Long Phu 1 Thermal Power Plant EIA Feasibility Study

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Figure 1-2 Operation process


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1.5.3 Main items of the project

The Long Phu 1 thermal power project locates in Long Phu – Soc Trangthermal complex, includes:

1.5.3.1 Main power plant area

The main power plant is arranged at the centre of the project site includingfollowing items:- Main transformer;- Building of turbine, generator and auxiliaries;- Coal hopper – grinder room and boiler room;- Central control building;- Area for installation of ESPs;- Boiler stack;- Area for arranging equipment and FGD’s auxiliaries such as: FGD control

building, limestone grinder station, gypsum de-water system and limestonestorage;

- Discharge ash pumping station is arranged near the ESP area and ash silos;- Stand-by diesel generator station is arranged near the boiler room to

connect with the auxiliary power system.

1.5.3.2 220kV/500kV switchyards

The 220kV/500kV switchyards are designed for the whole Power Complexand arranged at the northwest of the power plant. It is contiguous to Ba Samcanal. A corridor for outgoing feeders of the transmission line is planned infront of the switchyards.

1.5.3.3 Coal storage area

Coal storage area of Long Phu 1 power plant is arranged at coal storage areaof the Power Complex. The Long Phu 1 power plant of 1,200MW has 01 drycoal storage building and 01 storage yard (out-door storage) with capabilityadequate for the operation of the power plant in 30 days at full load.

1.5.3.4 Coal, oil, limestone, gypsum ports

The coal unloading port is designed for whole Power Complex and isdeveloped according to each construction phase of the power plants. Eachpower plant in the power complex will have a separate coal unloading berthcapable for vessels of 10,000DWT at a same time.In the first phase, the coal berth is designed for 5,000DWT and 10,000DWTvessels. From the port, the coal conveyors, oil piping will transport coal, oil to


Page 1-8

the power plant area.An oil jetty is designed for the whole power complex capable for 5,000 DWTvessels; a limestone unloading berth for 3,000 DWT vessels; a gypsumunloading berth for 3,000DWT vessels; an ash loading berth for 3,000DWTvessels; and a temporary equipment unloading berth for 1,000 DWT vessels.

1.5.4 Auxiliary items and equipments

1.5.4.1 Cooling water system

Cooling water is water from Hau river. Cooling water system includes coolingwater intake and intake canal, cooling water pump station, chlorinationsystem, cooling water supply piping, and cooling water discharge system.Cooling water discharge system: waste water from condenser is led to siphonpit through 02 steel pipelines with diameter of 3800 mm and lengths of 180mand 195m respectively. From the siphon pit, waste water is led to dischargechannel by 02 double reinforced concrete discharge culverts with dimensionsof each double culvert of 2 x 2.6mx2.6m, then it is led to an open canal beforedischarge to Hau river.Open canal: made by reinforced concrete, designed for the Long Phu PowerComplex (at the canal end connecting to discharge culverts of each powerplant). The canal is designed to underground discharge.

1.5.4.2 Fresh water supply system

Fresh water is brackish water from Hau river. Due to hydrographiccharacteristics of Hau River at Soc Trang, water from Hau River is fresh waterin 6 months of rainy season with TDS <1,000mg/l. In 6 months of dry season,Hau river is invaded by salt water, TDS is <5,000 mg/l. Therefore Hau riverwater shall be de-salinated to meet requirements on quality of portable waterand technical water.Fresh water supply system of the plant includes re-filtering process,desalination process, and demineralized water process.- Pre-treatment system: supply raw water to the systems such as: FGD, coal

transportation, ash discharge systems and supply water for the RO system.- Desalination system (applying RO technology): supply water to daily

activities, technical service system, and boiler demineralized water system.- Demineralized water system (demineralization technology applied is RO

technology combined with the mixed bed ion exchanger or combined withelectro deionization): supply water to boiler.

1.5.4.3 Waste water treatment system

Waste water treatment system is designed to treat waste water from manydifferent sources in the plant to meet standard TCVN 5945:2005.


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1.5.4.4 Other auxiliary equipments and systems

- Compressed air system.- The system of production and distribution Hydro.- The system of storage and distribution CO2.- Equipment and structures equipment upgrade.

27

35

47

3900,0001683,000450,000256,000252,000433,000368,000458,000

1/1T.L:

D.A.Ñ.T

FIGURE 1-3: GENERAL SPACE OF LONG PHU POWER CENTER

27003C-NÑ-C-036-2009HC: 4

PETRO VIETNAM

POWER PLANT LAYOUT

VIETNAM ELECTRICITYPOWER ENGINEERING CONSULTING JS COMPANY 3

27003C-NÑ-C-04Basic Design

Scale:6-2009

1/1

Hoà Höõu Hoïc

Hoà Ñaêng Tieán

Nguyeãn N.H.Tuaán

Nguyeãn N.TröôøngRev.:4

GENERAL

Revised according to MOM No. 444/TB-EVN dated 11/09/2008

Revised according to MOM No. 242/TB-EVN dated 22/05/20081 07-2008

Revised according to MOM No. 3430/BB-DKVN dated 14/05/2009

2 09-2008

Revised according to MOM dated 04/06/2009 between PVN and PECC3

Nguyeãn N.H.TuaánDirector

ProjectManager

EngineeringManager

Checkedby

Designedby

3

406-2009

06-2009


Page 1-10

1.5.5 Water supply source

1.5.5.1 Water source

The survey result shows that underground water can not ensure for the watersupply with high quantity and good quality during along time to the powerplant. Therefore, the main water source for the power plants will be waterfrom Hau river. Undergroundwater shall be used as stand-by water source andshall be used during construction phase.With the survey of Hau river water source, present water treatment technologyand assessment of location alternatives, water will be taken right at theconstruction site of the power complex. Water at this location has highestdaily average salinity in dry season to be <5,000 mg/l.

1.5.5.2 Requirement on technical water and daily activities for the Long Phu 1 plant

Fresh water is required for daily activities as well as for technical operationsof the power plant. However, fresh water source is scarce in dry season due tosaltwater invasion and limitation of groundwater. In order to save the cost,some items will use brackish water instead of fresh water such as: ashdischarge system, dust prevention system, FGD. Other items will use freshwater according to technical requirements.

• Brackish water with TDS of 2000 mg/l - 5000 mg/l through filterBrackish water after preliminary clarification, precipitation and filtration bysand and gravel layers, it will be used for following items:- Water for wet ash discharge : 3,000 m3/day- Water for coal transportation and storage system : 2,300 m3/day- Water for FGD : 4,500 m3/day- Total : 9,800 m3/day

• Fresh water with TDS < 500 mg/l

Fresh water from fresh water source or from desalinated brackish water sourcewill be used for following items:- General Service : 1,200 m3/day- Daily activities : 450 m3/day- Water supply for the demineralization system : 2,350 m3/day- Total : 4,000 m3/day

1.5.5.3 Waste water treatment station at Long Phu 1 Power Plant

Waste water treatment station at Long Phu 1 is designed by the operation asfollows:

- 06 months in dry season: operating the desalinize systems for items having


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fresh water demand.- 06 months in rainy season: not operate the desalinize systems.

1.5.6 Source and supply system of fuel

1.5.6.1 Source and supply system of coal

Main fuel of Long Phu 1 Power plant is coal, with capacity 1200MW, LongPhu 1 power plant will import about 2,6 – 2,8 million tons coal/year.Now, importing coal sources have not identified yet, but, on market surveyabout high-heating value coal, position and location of coal sources can onlybe from Australia or Indonesia.Two coal samples will be chosen for the software Thermoflow Steam Pro 17(2007) as designed coal and worst quality coal.Basic characteristics of coal

Table 1-1 Basic characteristics of coal

No. Characteristic Sample (adb)

1. Gross heat value HHV (Kcal/kg) 5,500 – 6,100

2. Moisture content (%) 10-14

3. Ash content (%) 10-15

4. Volatile matter (%) 25-42

5. Sulfur (%) 0.6-0.8

6. Grindability (HGI) 45-50

Source: Feasibility Study, Jun. 2009.

Coal transportation alternative

Steam coal of Long Phu Power Complex expected to import from Indonesia orAustralia through intermediate port by 70,000 DWT – 100,000 DWT vessels.The intermediate port is considered at 3 locations: Vinh Tan (Binh Thuanprovince), Nam Du (Kien Giang) and Duyen Hai (Tra Vinh).The survey for selection of port construction location requires deep study in aseparate project and chosen in next stage.From intermediate ports, Steam coal is transported to Long Phu port (on HauRiver, far away coal storage about 300m) by 10,000 DWT barge.Coal supply and storage systemCoal supply and storage system includes:- Coal unloading equipments installed at coal port;- Coal conveyor system transporting coal from the coal port to coal storage;- Coal storages (01 dry storage building and 02 coal storage stock-piles) with

capacity adequate for 30-day full load operation;


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- Stack and reclaimers;- Coal conveyor transporting coal from the coal storage to the bunkers of

boiler.

1.5.6.2 Source and supply system of oil

Oil demandDO is used for boiler starting-up and firing at load lower than 40%. After theunit being started-up and synchronized to the power grid, the boiler willoperate by pulverized coal without co-firing by DO.DO consumption of the power plant depends on operation mode. Average DOconsumption/year of 2 units: 3,942 tons/year x 2 = 7,884 tons/year (rounded as8,000 tons/year). Average: 1.02 gr/kWh.Technical characteristicsPresently, Distillated oil (DO) used in Vietnam is often in two types: lowsulfur content (0.05%) and normal (0.25%). DO types used popularly forthermal power plants in Vietnam belong to normal type according toVietnamese standard 5689:2005. It is supplied by Petro Vietnam withfollowing characteristics:

Table 1-2 Characteristics of DO

No. Characteristic Unit Limits Method1 Sulphur content, max %wt 0.05 0.25 ASTM D4294-032 Cetane index, min - 46 ASTM D976-04a3 Distillation (90% recovered, max) 0C 360 ASTM D86-04b4 Flash point by PMCC, min 0C 55 ASTM D93-02a5 Kinematic viscosity at 400C cSt 2 ÷ 4.5 ASTM D445-04 1

6Carbon of 10% distillationresidue, max %wt 0.3

ASTM D189-01or D4530-03

7 Pour point, ma 0C +6 ASTM D97-048 Ash content, max %wt 0.01 ASTM D482-039 Water content, max %vol. 200 ASTM E20310 Particulate contaminant, max mg/l 10 ASTM D2276-0011 Copper corrosion at 500C/3h, max number 1 ASTM D130-0412 Density at 150C kg/l 0.820÷0.860 ASTM D1298-99 2

13 Evaluating lubricity, max m 460 ASTM D6079-0414 Appearance - Clear Visual

Source: Petroleum Company - Zone 2, Petrovietnam

Supply sourceDO can be supplied from national oil refinery plants such as Dung Quat, NghiSon or it can be imported in case there is no suitable type from national oilrefinery plants. Presents, DO can be supplied from Petroleum Company -


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Zone 2.Transportation and unloadingDO is transported to the oil port of the power plant by 1,000DWT barge. Fromhere, oil is pumped to the power plant by the oil piping system with diameterof 200m (8” pipe, schedule 40). Piping length is about 250m.DO supply and storage system: includes- 02 oil tanks: 2x1,000 m3;- 02 transfer pumps: 2 x 100%;- 01 oil flowmeter.

1.5.6.3 Source and supply system of limestone

Limestone demand of Long Phu 1 power plantLimestone is used in desulphurization for emission gas of the power plant asenvironmental requirement.With CaCO3 content of about 96%, limestone consumption of the 1,200 MWLong Phu 1 power plant in case using coal with sulfur content of 0,53% -0,86% will be 176 – 280 tons/day respectively.Limestone consumption in one year: about 48,000 – 76,000 tons/year.Limestone will be supplied in type of less than 5mm – 20mm size stone.Limestone sourceLimestone source can be from Kien Luong, Kien Giang province or from theNorth or Northern Central of Vietnam. It can be transported to the powercomplex by barge of 600 – 3,000 DWT capacity.- The North: Nam Thanh Bac Nghe, Tan Truong mountain – Giao mountain

belonging to Tan Truong commune, Tinh Gia district, Thanh Hoa province:reserves is 6394 million tons.

- Kien Giang province:According to information of the Kien Giang Industry Department, limestonereserve of Kien Giang is 440 million tons; in which, limestone reserveaccepted for exploitation companies is 181.76 million tons, remaining reservelocates in the military area, historical monument, cultural vestige, landscapeand exploitations in these areas are forbidden. Limestone demand of 05cement plants, 01 clinker plant in the province is about 4 million tons/year.Information from Kien Giang Department of Natural resources &Environment shows that presently, at Kien Luong district, Kien Giangprovince have 05 companies exploiting limestone for producing cement notfor selling raw limestone. Other 04 companies exploit limestone for selling.They are Kien Ha Ltd. Company, Northern construction & minerals J.Scompany, Limestone exploitation enterprise no. 406 of the 621 company -Military Zone no.9 and Kien Giang cement J.S Company.


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PECC3 has received response letters from the Kien Ha Ltd. Company asfollows:- Kien Ha Ltd. Company presently has 02 limestone mines which can supply

from 7,000 – 10,000 tons /month with stable capability.- Desire of long lasting co-operation;- Quality of limestone at Tuc Khoi mountain, Hoa Dien commune, Kien

Luong district, Kien Giang province shows that it has 96% CaCO3.With demand of the Long Phu 1 power plant of about 176 – 280 tons oflimestone per day, Kien Ha Co. with capability of 7,000 – 10,000 can meet therequirement.The system comprises:- 01 grab unloader.- 01 limestone conveying chain.- 02 limestone crushers.- 02 limestone storage silos, each has capacity enough for 01 FGD operating

in 14 days. From each silo, limestone is supplied for the wet crusher tomade limestone slurry through an intermediate silo .

1.5.7 Ash removal system

With the pulverized coal fired boiler technology, ash discharged from theboiler is mainly in two forms: bottom ash, and fly ash collecting from the ESP,boiler economizer and air heater.There are four sequentially systems in the ash handling system:- Bottom ash handling system (bottom as handling system): Technology of

dry ash removal.- Fly ash handling system.- Ash transportation and storage system (ash transportation system): ash will

be supplied directly as additive for cement under dry form from the silosthrough an ash pipe of about 300m and then transported by 25T trucks(dump truck) and 1,000 – 3,000 DWT barges. In case ash is not consumed,ash will be transported to the ash disposal area and mixed with water toform ash slurry. Then it will be pumped to the ash pond.

- Ash pond: will be able to store ash discharged in 30 years in case volume ofash is 30%. In case ash is not consumed, the ash pond will be able to storetotal ash discharged in 10 years.

1.5.8 Stacks of the plant

Boiler stacks are designed for both two units with separate gas passes for eachunit. Flue gas discharged from the ESP with temperature of about 1300C is ledto the gas-gas heater (GGH) prior to reaching the wet FGD. Flue gas out of the


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FGD has low temperature (about 58oC) and it will be heated-up to about 90oCby the GGH before going to the gas passes.Selected stack height is 200m to meet requirements on flue gas dischargeaccording to the Vietnamese standard No. 5937-2005.Stack comprises steel-reinforced concrete structure for covering, force bearingto the steel gas passes with inner diameter of 6,200mm to ensure for expectedgas flow velocity of about 20 m/s- 25 m/s.The main structures and equipments of the stacks are:- The steel reinforce concrete outer is painted with color as stipulated in

aeronautical notice and it is furnished with access doors for ash removal,equipment transportation as well as the connection with gas passes.

- Two gas passes with inner diameter of 6,200mm with structure as follows:steel pipe trunk made by steel plate with 10-15mm according to positions.Inner of pipe is lined with anti-corrosion layer of inorganic foamedborosilicate glass blocks, they are fixed in the steel pipe and linked togetherby specific glue and mortar. The anti-corrosion blocks with about 40mmthickness including the glue layers are withstand up to 1990C temperature.Inner diameter inside the in the anti-corrosion layer is 6,200mm enough fordesigned flue gas velocity of 20 -25 m/s.

- 01 lightning system designed according IEC standards comprisesconductor, grounding wire, and grounding system.

- 01 aeronautical signal lamp system.- 01 elevator for maintenance with loading capacity of about 500kg;- 01 system of holes for monitoring, controlling flue gas.

1.5.9 Exhaust gas treatment system (dust and SO2)

To meet emission standard, the plant will install treatment system of dust andSO2 as follows:Dust removal (Electrostatic Precipitator – ESP):The electrostatic precipitator uses electrostatic method to collect dust. The fluegas laden with fly ash is sent through discharge electrodes which give theparticles a negative charge. The particles are then routed past positive plates(grounded collection electrodes), which attract the now negative ash particles.The particles stick to the collection plates until they are collected. Removal isaccomplished by a mechanical rapper system knocking the ash particulatematter off the collecting plates and dropping it into a hopper at the bottom ofthe precipitator. Then the ash particulate will be discharged to the ash and slagdischarge system or the ash silo.Each ESP includes:- Discharge electrode,- Collecting electrode,


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- Rapping mechanism for cleaning,- Transformer – rectifier,- Ash hoppers.The ESP is operated by an own control center with a signal exchange to themain control room.SOx removal (Flue Gas Desulfurization – FGD):The plant will apply the chemical absorbing process to treat SOx withlimestones agent. Flue Gas Desulfurization by Wet Limestone Scrubbers isselected because it is in accordance with coal type having high content ofsulphur, not impact on the electrostatic precipitator (ESP), and have a highefficiency.The FGD of the 2x600MW Long Phu 1 power plant comprises followingitems:- 02 x 50% limestone conveyors to convey limestone form the berth to the

silos;- 02 limestone silos with storage capacity for 14 days;- 02 x 100% limestone grinding and supplying chains, each chain can supply

limestone for 02 units.- 02 SOx absorber modules, each for one unit,- 03 x 50% vaccum belt filter trains, each for 01 FGD and 01 stand-by;- Valve and piping systems for flue gas;- The gas-gas heater (GGH) for each unit;- Gypsum storage and conveyor system to transport gypsum to the port;- Make-up water tank for FGD;- Port and limestone unloading equipments from barge to silos of each power

plant;- Port and gypsum loading equipments for barge.

1.5.10 Gypsum transportation system

Gypsum after being dried will be conveyed by two conveyors to the storageswith expected capacity for three days. From the storage, limestone is conveyedto the loading port. Here, the port is equipped with ship loaders for the barges.Daily production of limestone is 243 tons/day.The gypsum transportation, storage and loading systems comprise followingmain items:- 02 x 100% gypsum conveyors from the drying system to the storage;- Gypsum storage of 1,500T and reclaimer;- 02 x 100% gypsum conveyors with capacity of 2 x 250 T/h (800 mm, 1


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m/s) from the storage to loading equipment at the port;- 01 gypsum loading equipment with average capacity of 125 T/h and 250

T/h maximum. Loading equipment is used commonly for the whole powerplants in the Power Complex.

1.5.11 Power system of the power plant

Long Phu 1 power plant will be an important power source of the Nationalpower system in general and of the region in particular. Electric power will besupplied to the National power system at 220kV and 500kV voltage levels viasystem of 02 bus-bars with 03 circuit breakers for 02 feeders, assuring thecontinuous power supply for the National power system.

1.5.12 Communication & SCADA system

The communication system of factories in complex has following maincomponents:- Private Automatic Branch Exchange (PABX) possible of synchronous dial

up with the EVN PABX Networks;- Radio Communication System VHF/UHF, UHF;- Announcing Speakers System;- Fiber Optic Transmission System (FOTS) comprises: optical transmitter

SDH/STM – 1, fiber cable, Multiplexer PCM-30: are equipped forcommunication channel, protection channel and SCADA/EMS system withhigh capacity and speed

- The SCADA/EMS system including (Control Center and Remote TerminalUnits) RTU/Gateway is connected Digital Control System (DCS),equipments and supporting software to transmit/receive information withSCADA system at Network Load Dispatch Center A0 and A2.

- LAN/WAN network;- Global Positioning System (GPS);- Camera system for three main areas: coal unloading, boiler area and the

main power plan area (gate, fence, stack, turbine, pump, generator,switchyard …).

1.5.13 Control and Instrumentation system (DCS)

The control and instrumentation system for the Long Phu 1 Thermal PowerPlant of 2x600MW shall be Integrated Control & Monitoring System – ICMS.This system shall provide safe, reliable and efficient operation of all units andstation/common plant.All equipments for this system shall be advanced type and have beencommercially proven.

1.5.14 Ventilation and air conditioning system


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The ventilation systems will be equipped for the areas that have not highrequirements on air and temperature conditions, it mainly requires ventilationand heat reducing for equipments.The air conditioning systems will be equipped at area that have highrequirement on environment such as room for high accurate electronicequipments or room for equipments with particular recommendations from theManufacturers on temperature and moisture, rooms with regular present ofpeople.

1.5.15 Fire fighting system

Fire-fighting for the thermal power plant is an important issue, affectingalmost items of the project. It comprises following items: fire detectionsystem, fire pumping system, out door fire hydrant, in door fire hydrant, theautomatic water spray system, sprinker system, foam fire-fighting system,inert gas system, emergency light system, portable fire extinguisher.The fire-fighting system is designed according to the latest Vietnamese andInternational standards.

1.5.16 Internal road system

Internal roads of the Long Phu 1 power plant has 4m to 10m width, extensionradius are 6m or 10m. Sand surface road is compacted to K95 grade. Structureof the road comprises: mountain gravel layer of 25cm thickness, macadamlayer of 15 cm thickness (macadam grade 2) according to Vietnamesestandard No. 22TCN211-06. Pavements are constructed by concrete , stone of1x2, B15.

1.5.17 Drainage system

Drainage system includes system of culvert, main hole and directly dischargeto Hau River. Besides, the drainage system is calculated to ensure fulldischarging of water flow.

1.5.18 Waste treatment system and monitoring system

- Waste water treatment system: after waste water has been treated to meetcurrent regulations, it will be discharged to Hau River following dischargecanal of cooling water.

- Solid waste: domestic solid waste will be collected, classified andcontracted with organizations of collection and treatment.

- Environmental monitoring: the plant will combine with specializedorganizations for setting up and implementation of environmentalmonitoring program.

1.5.19 Landscape and planting

Flower garden, trees, grass, water pond shall be designed in harmony with


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natural scene and overall architecture of the plant. Green will cover on thewhole the plant, not only in a separate area. At the administration building,public areas, both sides of roads, trees and grass concentrate more that atequipment areas. Trees and grass will occupy at least 10% total area of theplant and the Long Phu Power Complex.

1.5.20 Compensation and resettlement

Site clearance of proposed area for construction of Long Phu – Soc TrangPower Complex and infrastructure (building for employees, resettlement areafor affected people…) is included in the project “Infrastructure of Long PhuPower Complex”. Therefore, Long Phu 1 power plant (located in Long PhuPower Complex) is considered as located in area already done site clearance.As a result of this, Long Phu 1 plant does not include activities such asresettlement and relocation.

1.5.21 Construction arrangement

Water source for constructionWater demand of construction works, site activities is calculated as follows:- Water for mixing concrete: 140m3/day.- Water for manufacture and maintenance workshop: 90m3/day.- Water for soil, stone works, cleaning materials, equipments, vehicles:

230m3/day.- Water for other demand: 75m3/day.Total water for construction: 535m3/day.Water for daily activities at site: total workers at site will be about 1,000persons. With consumption rate of 120 l/person/day, total water demand isabout: 1,000 x 120 = 120 m3/day.Total water demand during construction phase is 655m3/day.Contingency of 10%: 65.5m3/day.Total: 720,5m3/ngày.Water source for construction and daily activities can be from Hau river.Water from Hau River will be pumped by the raw water pumping station tothe water treatment system, then stored in the storage tanks. From here, freshwater will be pumped to the water tower to create pressure leading toconsumed areas.Details of this altervative are presented in the Water for Construction Reportof the Long Phu Power Complex Infrastructure Project.

Power source for construction


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Table 1-3 Power demand for construction work

Equipment Unit Quantity Capacity(kW)

Totalcapacity

(kW)Welding machine machine 20 50 1,000Grinder machine 10 2 20Potable grinder/cutter machine 30 1.5 45Potable drill machine 30 1.5 45Vibrator machine 20 1.5 30Air compressor of 240m3/h machine 2 22 44Air compressor of 600m3/h machine 2 55 1105 tons electric hoist hoist 2 7.5 1510 tons electric hoist hoist 2 15 3015 tons electric hoist hoist 2 22 44Crane of 70 tons (also usedfor installation of equipmentin the turbine building)

Crane 1 75 75

Steel bending machine machine 8 5 40Steel plate cutting machine machine 2 15 30Punching-and-shearingmachine machine 2 3 6

Water pump machine 45 20 900Concrete mixing plant plant 2 300 600Workshop workshop 1 1,000 1,000Mechanical workshop workshop 1 1,000 1,000Electricity for service andoffice, storage system 1 2,000 2,000

Total 6,794

Source: Feasibility Study, Jun. 2009.

With coincidence factor Kdt= 0.7; utilized factor Kmt = 0.8; capacity factorcosϕ= 0.85, power demand for construction system: S= 4,634kVA.Like this, power demand of construction work is about 5,000kVA. Powersource for construction can be supplied from following sources:- Dai Ngai 110kV/22kV – 25MVA station, about 5km far from the project

location.- 110kV/22kV – 16MVA temporaty station, connecting to Dai Ngai – Tran

De 110kV branch.Particular plan of power source for construction is determined in the Long PhuPower Complex Infrastructure Project.

Construction materials supply sourceMaterials for construction of the power plant are expected to be supplied from


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local sources and surroundings.- Sand for leveling will be purchased from legal exploitation source in Hau

River.- Sand for mixing concrete is taken from Cambodia and Tan Chau sand pit

(Dong Thap) or An Giang.- Macadam is transported from Chau Thoi – Dong Nai or Co To – An Giang

quarries;- Concrete is mixed at site.- Steel rods with diameter from 6mm to 32mm for reinforced concrete will be

supplied from domestic steel plants will good quality.- Special steel such as large and thick steel plates for construction of storage

tanks or cooling water piping, large section figured steel will be imported.- Normal bolts will be produced in Vietnam. High tension bolts will be

imported.- Some other special materials such as water proof plates, construction joints,

unshrinkable mortar, geomembrance … all can be purchased from localagencies.

Transportation of equipments and materialsMaterials and equipments are transported by special transportation meansaccording to each material/equipment type.For imported equipments, they will be transported by sea way to site location.For other equipments, they will be transported by land. It is rather convenientsince the construction site is near the main transportation route.

1.5.22 Total investment cost

Total investment cost: 24,361.21 billion VND, equally 1,438.26 million USD(according to Project Feasibility Study on June 2009).- Cost for environmental treatment works (exhaust gas treatment system, the

exhaust gas distribution system, stacks, waste water treatment system, watersupply, and ventilation system…) is about 78.26 mil USD equally 1,292.5billion VND (already included in investment cost of the project).

- Cost for monitoring during construction phase is 21,600,000VND/year(included in investment cost of the project).

- Cost for monitoring during operation phase is 100,100,000VND/ the fistyear and 71,300,000VND/year from the second year.

Source of investment cost: capital of PetroVietnam.

1.5.23 Project implementation

PetroVietnam (representative by Long Phu – Song Hau Petro-Power ProjectManagement Board) is investor, taking responsibilities in projectimplementation, project management including environmental management.


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1.5.24 Schedule of the project

First turbine unit is proposed to be operated in July 2013. Schedule of the LongPhu 1 thermal power plant is as follows:


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Table 1-4 Schedule of the project


Page 2-1

CH NG 2CHAPTER 2: PHYSICAL, ENVIRONMENTAL AND

SOCIO-ECONOMIC CONDITIONS

2.1 PHYSICAL AND ENVIRONMENT CONDITIONS

2.1.1 Physical conditions

2.1.1.1 Topography

Topography of Soc Trang province has the main slope from Hau River andlower when moving inwards, from Eastern Sea and Quan Lo canal lowerinwards the land, with the sands on the seaside and riverside. The variabilityof altitude is not high, only 0.2 – 1.2m above sea level; the altitude ofmainland is 0.5 – 1.0m in average. The south of Thanh Tri and My Tu districtsis lower, which makes these areas flooded. In coastal and riparian areas,alluvium, wind and sea wave made great dune along coast line. The dunes arefrom 1.2m to 2m high. Topography has a low altitude, is cleaved by thesystem of rivers, canals and irrigation canals; and borders with the sea so soilis penetrated easily by sea water (salty infection).Topography of proposed area is rather even-flat, has few rivers, and is mainlyrice fields. Population concentrated mainly along two sides of river-bankdikes, houses are not solidity and scatter. Average height level of topographyis from 0.6 to 1.5 meter and some places are shorter.Topography of proposed area is relative even-flat, non slope, rivers and canalsshould be less likely to erode the very small, and concurrently very convenientfor emissiving exhausted gas and minimizing impacts on aire environmentalarea.

2.1.1.2 Geology

Basing on geological map of Tra Vinh – Con Dao page (C-48-XXIII & C-48-XXIX) and An Bien – Soc Trang page (C-48-XXI & C-48-XXII) of VietnamGeology Department, we may divide the spectra of research areas from top tobottom as follows:Swamp river sediment (abQIV 2-3): belongs to middle-upper Hologen: coveron surface of project area, mostly sandy mud, clayey mud integrated with floravestige; the colors are dark-grey, brown; viscous-fluid statement ch y – d o .Thickness is from 10m to 20m.Marine deposit (mQIV 2hg): belongs to middle Halogen: sand, silt, clay; thecolors are brownish grey and yellowish brown. Thickness is 15metersMarine deposit (mQIV 3lm): belongs to Long My formation including twopart, the upper is sand intermixed with few grits; the lower is silt sand, siltclay, brown clay, light yellow with motley white loang l tr ng. Thickness is


Page 2-2

is from 20 to 50meters.Marine deposit (mQII-III lt): belongs to Long Toan formation: it comprisesmainly fine grain deposit such as clay, silt clay, sand interlaid with floralvestige silt and peat. Thickness is from 30m to 60m.

2.1.1.3 Hydrometeological conditions

Hydrographic conditionsSoc Trang is located adjacent to Eastern sea and Hau river (belongs MekongDelta) so its hydrographic regime depends on water source of the river andtidal regime of the sea, with amplitude decreases from estuaries forwardsriver. Tidal of Soc Trang province has non-uniform semidiurnal tide, there aretwo flood-tide on lunar 15th and 30th, amplitude ranges from 1 to 4meters.

Figure 2-1 Hydrological regime of hau river at Dai Ngai

During operation phase, project is taken water from Hau river for cooling.However, capacity input is very small compared with capacity of Hau River(56 m3/s compared with annual average capacity is 2.440 m3/s), thus it is notimpact significantly to hydrological regime, the flow of Hau river and region.Air temperatureAir temperature is one of natural elemets impacts directly to conversionprocess and emission pollutants in atmosphere.The more air temperature is, the more speed of chemical reaction occurs andthe less pollutant exist. Temperature variation will effect to heat exchangecycle of body and health of workers. Hence, study of temperature conditions isnecessary.Collecting data from 1979 to 2007 is listed here:- Average annual temperature: 26.7OC- Maximum temperature: 37.2OC- Minimum temperature: 13.1OC

-20

0

20

40

60cm

1 2 3 4 5 6 7 8 9 10 11 12

Average water level of Hau river at Dai Ngai

month


Page 2-3

Table 2-1 Summary table of environmental temperature from 1979 to 2007

Unit: 0C

Month 1 2 3 4 5 6 7 8 9 10 11 12

Average 25.2 25.8 27.2 28.3 28.0 27.3 26.9 26.8 26.7 26.7 26.4 25.4

Maximun 35.3 34.8 36.3 37.1 37.2 35.5 34.1 34.1 34 33.7 33.5 32.7

Minimum 13.9 13.1 16.9 18.8 20.2 21.8 21.3 21.3 19.5 15.7 18.0 13.0

Source: Soc Trang hydrometeorology station, 2008

As the air temperature range above, this is quite convenient condition todistribute exhaust gas and disperses thermal for cooling water.Solar radiationAs project area is located in low latitude (100 North), position of sun is oftenhigh and be changed little over months. Thus, solar radiation is quite stable.

Table 2-2 Hours of sunlight per yearUnit: hour

Year I II III IV V VI VII VIII IX X XI XII

1995 235.9 259.6 260.9 283.5 197.7 154.3 183.5 174.7 97.0 188.5 127.2 173.1

1996 194.0 222.6 306.5 238.3 176.2 168.5 119.8 180.3 135.5 136.5 150.9 141.6

1997 257.3 180.3 275.6 223.3 211.0 188.8 130.3 137.4 145.4 161.2 220.6 219.0

1998 289.2 259.7 310.4 256.2 232.4 155.0 208.2 178.6 136.8 112.0 144.2 153.9

1999 176.2 206.1 246.5 151.9 157.1 145.1 149.9 152.9 160.6 146.4 176.0 159.6

2000 250.8 192.8 216.3 218.2 176.3 152.5 160.6 139.1 178.0 105.8 182.6 184.0

2001 193.1 191.0 189.8 232.4 186.5 116.5 189.3 117.8 174.3 118.6 139.1 174.8

2002 257.4 241.0 276.4 268.1 203.1 151.7 181.6 N 134.9 169.4 179.7 220.6

2003 237.9 262.9 302.0 281.2 117.1 183.6 187.0 187.7 130.8 129.7 222.9 158.5

2004 243.3 242.7 269.7 265.0 191.1 152.7 176.8 152.2 184.8 187.9 249.6 215.4

2005 253.1 278.0 290.1 272.6 203.6 200.1 141.6 201.6 150.7 187.1 192.7 115.7

2006 237.6 264.4 295.3 280.1 109.7 184.7 183.7 180.8 125.6 124.3 219.2 159.7

2007 241.9 237.3 266.4 257.6 189.0 145.1 175.9 144.2 181.0 187.0 251.7 212.4

Average 250.3 248.9 283.2 254.6 193.5 160.9 174.0 164.9 153.7 162.0 197.8 207.1


Solar radiation is one of important factors which effects directly to thermalcondition in the region then will effect on sustainable level of atmosphere andprocess of distribute and converse of toxic substances in exhaust gas.Atmospheric pressure


Page 2-4

Atmospheric pressure in region does not change in a wide range amongseasons. Monthly average varies at 1009.6 mb, the highest is 1019.6 mb, andthe lowest is 1000mb.Air humidityAir humidity as air temperature is one of natural factors which affect directlyon processs of transfer, distribution pollutant in atmosphere and heat exchangeof body, hence if will effect on health of workers.Air humidityAs project area is located in equatorial monsoon region and influenced directlyby marine climate so it often has high humidity. In cold season, the weather ishot and dry so humidity is reduced. Humidity changes between 79-89%,average annual is 84%, the highest is in August and the lowest is in April.

Table 2-3 Relative humidity per yearUnit: %

Year I II III IV V VI VII VIII IX X XI XII N m

1995 78 78 78 76 82 87 88 88 90 87 86 82 83

1996 81 76 75 79 87 89 89 88 88 89 88 85 84

1997 82 79 77 79 81 86 90 89 89 88 85 80 84

1998 78 79 75 77 81 89 89 89 90 90 88 86 84

1999 83 80 81 89 90 90 90 88 87 90 87 83 86

2000 80 82 80 85 87 88 88 88 87 89 86 85 85

2001 82 81 83 83 87 87 88 91 90 91 87 83 86

2002 80 79 80 80 86 92 89 91 90 89 89 86 86

2003 83 81 83 81 89 88 91 91 90 89 86 84 86

2004 82 81 81 79 83 87 88 89 88 85 81 85 84

2005 81 79 79 80 84 86 89 87 88 86 85 85 84

2006 83 81 83 81 89 88 91 91 90 89 86 84 86

2007 82 81 81 79 83 87 88 89 88 85 81 85 84

Average 80 79 78 79 85 87 88 88 89 88 86 83 84


Rain regimeRain can filter air pollutant and dilute water pollutant. Air pollutant in rainnyseason is lower than these in dry season because its ability of distribute isdifficult. Pollutant is entrained easily to water resources in rain so it isincreased surface water polluted. Furthermore, rain can cause flood andinundation; hence project has to have rainny parameters to design compatiblyconstruction work and sewerage system.Rain season, lasts from May to of November, has about 130 rainny days, totalrainfall in rain season reachs 1,196.3mm (2007).


Page 2-5

Dry season, lasts from December to April of the following year, total rainfallreachs only hundreds of milimeter. Monthly average rainfall ranges from 30-50mm. The lowest or no rain often was occured in January, February andMarch (5-10mm).Rainfall per year ranges from 2000 - 3000mm. According to statistics in 2003,2004, 2005, 2006 and 2007, the year 2007 as the year has the lowest rainfall(1,270.1 mm), due to it has no rain or very low rainfall in dry season causesseriously lack of water for agricultural production and living.The variable of rainfall often has one maximum in October and one minimumin January or February or March. At Hau estuary region, it is affected stronglyby flood causes changing water level and creating heavy flood in rainnyseason.

Table 2-4 Monthly average rainfallUnit: mm

Year I II III IV V VI VII VIII IX X XI XII N m

1995 0.3 0.0 14.0 0.0 302.8 258.5 301.6 381.6 303.4 232.2 132.3 37.5 1964.2

1996 20.7 0.1 0.0 79.7 324.2 446.6 414.6 123.2 254.5 246.0 141.3 83.1 2134.0

1997 0.7 1.4 0.6 60.8 135.9 280.0 484.9 402.6 255.9 251.4 231.1 1.0 2106.3

1998 0.0 0.0 0.0 5.2 156.8 375.4 273.2 386.2 359.2 340.7 92.5 103.2 2092.4

1999 12.7 19.6 18.5 618.8 364.6 350.0 294.0 284.3 178.2 316.7 205.8 119.9 2783.1

2000 0.0 17.7 17.7 175.8 206.8 298.2 215.5 402.3 260.6 414.5 75.9 108.0 2193.0

2001 0.9 2.4 156.7 159.9 179.4 137.9 281.6 282.3 263.0 359.0 186.8 33.4 2043.3

2002 0.0 0.0 0.0 14.1 348.9 318.4 119.2 331.9 252.9 274.4 135.8 7.4 1803.0

2003 1.5 0.0 0.0 40.9 300.9 169.6 426.1 215.4 278.5 554.3 103.7 9.3 2100.2

2004 20.8 0.1 0.0 0.3 159.0 208.3 236.3 264.0 218.8 218.7 45.5 52.6 1424.4

2005 0.0 0.1 1.6 6.6 253.5 229.4 419.0 208.9 346.7 349.4 164.8 119.9 2099.9

2006 2 0.0 0.0 41 301 170 426.1 215.4 279.7 554.3 104 9.3 2101.4

2007 20.8 0.1 0.0 0.3 159.0 211.6 236.3 144.2 181.0 218.7 45.5 52.6 1270.1

Average 3.3 3.4 13.0 76.6 228.8 277.5 264.2 301.2 289.7 301.0 136.3 38.6 1933.5


Evaporation potentialAverage amount of evaporation reaches over 1,000mm. In dry season,monthly average amount of evaporation reaches 130-140mm; in rain season, itreaches 60-70mm.

WindLocated in the tropical monsoon, it is formed prevailing wind direction asfollows: West, South West, North East and North West. It is divided into twodistinct seasons are Northeaster and Southwest. Rainy season is influencedessentially by the Southwest monsoon; dry season is influenced essentially bythe Northeast monsoon with average wind speed is 1.77m/s. In the whole year,


Page 2-6

time of windless or weak wind is about 8%. October and April are transitionalperiod of seasons, wind speed in this period is small which reaches about3m/s, but wind direction changes continuously causes not less difficulties infishing of fishermen at coastal areas.Topography of project area is relatively flat, ability of distribute air pollutantand dispersion heat of water cooling is easily. However, due to the diversity ofwind regime so it is quite complexly forecast air pollutant distributingdirection.Atmospheric stabilityAtmospheric stability affects to distributing ability of air pollutant. It isdeterminated on basis of wind speed and solar radiation in day or cloud coverat night.Atmospheric stability of region is determinated follow Pasquill categories.Depending on changing of solar radiation in day, cloud cover at night andwind speed, it is determinated atmospheric stability during a day.

Table 2-5 Pasquill classification of atmospheric stability

Solar radiation in day Cloud cover at nightWindspeed

(m/s)Strong

(amplitude> 60

cal/cm2/hour)

Average(amplitude

36-60cal/cm2/hour)

Weak(amplitude

15-35cal/cm2/hour)

Cloudless

>4/8

Cloudy

<3/4

<2

2-4

4-6

>6

A

A-B

B-C

C

A-B

B

B-C

D

B

C

C

D

-

E

D

D

-

F

ED

Source: Air pollution and pollutant treatment, volume 1, Doc. Tran Ngoc Chan, 2000Remark:

A: Non-sustainability D: Sustainability

B: Average non-sustainability E: Weak sustainability

C: Weak non- sustainability F: Average sustainability

When atmospheric stability in D, E, F categories, air pollutant distributingprocess is better than these in A, B, C categories.

2.1.2 Environmental quality status

From 05th to 11th Nov. 2007 and from 17th to 22nd Dec. 2007, PECC3 andInstitute of Tropical Biology were carried out 2 surveys to collect data onsocio-economic status, sample and analyse quality of air, water, soil andbiological environment in the project area. Below data is result from thesesurveys.And in Mar. 2008, PECC3 combined with Institute of Technical and Scienceon Resources and Enviroment Management to survey and sample quality of


Page 2-7

background environment in the project area.Following date is result of these surveys:

2.1.2.1 Surface water

From 17th to 22nd Dec. 2007, PECC3 and Institute of Tropical Biology hadcollected samples in 5 sites:- NM1: Pagodas in Thanh Duc hamlet 09o41’30.8”N – 106o05’52.3”E- NM2: in Hau river 09o42’40.4”N – 106o05’18.6”E- NM3: in Hau river 09o43’46.6”N – 106o04’41.4”E- NM4: junction of Ba Sam canal and Dai Ngai river 09o43’21.7”N –

106o04’10.3”E- NM5: in Ba Sam canal 09o41’45.2”N – 106o05’07.2”EIn March 2008, PECC3 and Institute of Technical and Science on Resourcesand Enviroment Management collected samples in 5 sites:- NM6: in An H ng hamlet 09o41’18.5”N - 106o04’24.46”E- NM7: in An H ng hamlet 09o40’57.49”N - 106o04’48.21”E- NM8: in An H ng hamlet 09o41’15.73”N - 106o05’13.94”E- NM9: in Ba Sam canal 09o42’26.62”N - 106o04’45.99”E- NM10: in Ba Sam canal 09o42’38.51”N - 106o04’38.48”ELocation of sampling is as follows:


Page 2-8

Figure 2-2 Sampling positions of surface water, underground water and soil

Analysis results for surface water quality are:


Page 2-9

Table 2-6 Analysis results for surface water qualityQCVN 08:2008/BTNMTNo Parameter Unit NM1 NM2 NM3 NM4 NM5 NM6 NM7 NM8 NM9 NM10

A1 A2 B1 B21 To oC 27.5 27.4 27.2 27.7 28.1 26.5 27.5 27.7 27.4 28.2 - - - -

2 pH 6.95 6.76 6.83 7.44 7.45 6.90 6.66 6.74 7.45 7.55 6-8.5 6-8.5 5.5-9 5.5-9

3Electricityconductance

µS/cm 62.3 55.2 52.6 58.5 56.0 63.3 56.5 54.6 58.0 56.5 - - - -

4 TSS mg/l 77 102 97 80 96 76 105 96 85 90 20 30 50 100

5 BOD5 mg/l 2 1 2 2 2 1 2 1 1 2 4 6 15 25

6 Cl- mg/l 15.27 10.86 7.53 10.30 7.99 14.27 10.75 7.40 11.20 7.90 250 400 600 -

7 Total Fe mg/l 1.80 2.16 2.17 2.12 2.38 1.85 2.20 2.15 2.10 2.30 0.5 1 1.5 2

8 NH4+ mg/l 0.02 0.05 0.05 0.06 0.05 0.04 0.03 0.04 0.05 0.04 0.1 0.2 0.5 1

9 NO3- mg/l 0.79 0.62 0.58 0.63 0.54 0.70 0.65 0.55 0.60 0.52 2 5 10 15

10 Total P mg/l 0.10 0.13 0.12 0.15 0.15 0.12 0.11 0.14 0.12 0.13 0.1 0.2 0.3 0.5

11 Oil andgrease mg/l 0.062 0.040 0.048 0.073 0.039 0.052 0.045 0.040 0.070 0.035 0.01 0.02 0.1 0.3

12 Coliform MPN/100ml 4,300 9,000 2,400 7,000 9,000 3,300 7,000 3,400 5,600 8,000 2,500 5000 7500 10,000

Source: Institute of Tropical Biology, Dec.2007 and Institute of Technical and Science on Resources and Enviroment Management Mar.2008.

Note: Sampling positions are shown in figure 2-2.


Page 2-10

Discussion:Temperature:Temperature varying between 27- 280C, the lowest is 26.50C and the highest is28.20C. The surface water has the temperature averaged.pHpH varying between 6.66 and 7.55, the water was neuter, were within theranges defined for running water according to National technical regulation forclass A1 (pH: 6-8.5).Electricity conductance (EC)EC is low, varying between 55.2 and 63.3µS/cm, the water is fresh water.Total suspended solidsThe high turbidity, water run very strong and fast were probably caused by thesediments, mineral, inorganic substance, organic substance… were dissolved,so total suspended solids is high. TSS varying between 76-105mg/l, werewithin the ranges defined for running water according to National technicalregulation (QCVN 08:2008/BTNMT) for class B2.Organic pollutionThe biological oxygen demand was low, lower than 2mg/l, were within theranges defined for running water according to National technical regulation(QCVN 08:2008/BTNMT) for class A1.Nutrient pollution (NH4, NO3, Total N)Value Amoni is not high, varying between 0.02-0.06mg/l were within theranges defined for running water according to National technical regulation(QCVN 08:2008/BTNMT) for class A1.Nitrate occurs in low value, varying between 0.52 and 0.79mg/l were withinthe ranges defined for running water according to Vietnam’s Nationaltechnical regulation (QCVN 08:2008/BTNMT) for class A1.In this survey, phosphorus occurs in high value, varying between 0.1 and0.15mg/l.Oil and grease pollutionThe water is polluted by oil and grease. The value varying between 0.035 and0.073mg/l were within the ranges defined for running water according toVietnam’s National technical regulation (QCVN 08:2008/BTNMT) for classB2 (smaller 0.3mg/l).Total FeTotal Fe ranged from 1.8mg/l to 2.38mg/l. The value were higher the rangesdefined for running water according to Vietnam’s National technicalregulation (QCVN 08:2008/BTNMT) for class B2 (<2mg/l).Coliform


Page 2-11

The water is coliform pollution. Total coliform at site NM3 is 2400MPN/100ml, it was within the ranges defined for running water according toVietnam’s National technical regulation (QCVN 08:2008/BTNMT) for classA1. And the other sites the total coliform were within the ranges defined forrunning water for class B2 (<10,000MPN/100ml)Remarks:Results show that water quality in the project area is rather clean, Hau riverwater is clean on nutrient and organic substances, but it is rather muddy.

2.1.2.2 Underground water

In December 2007, PECC3 and Institute of Tropical Biology had collectedsamples in 3 sites:- NN1: well of householder Vo Van Thang 09o42’25.64”N – 106o05’22.47”E- NN2: well of householder Truong Van Uong 09o43’0.48”N –

106o04’28.18”E- NN3: well of householder Truong Thanh Liem 09o41’46.07”N –

106o05’40.38”EIn March 2008, PECC3 and Institute of Technical and Science on Resourcesand Enviroment Management collected samples in 2 sites:- NN4: well of householder Le Van Kich 09o42’25.83”N – 106o04’52.47”E- NN5: Dai Ngai water supply station 09o43’58.79”N – 106o04’20.97”ESampling positions are shown in figure 2-2, analysis results are as follows:

Table 2-7 Analysis results for underground water quality

No Parameter Unit NN1 NN2 NN3 NN4 NN5 QCVN09:2008/BTNMT

1 To oC 26.2 26.5 26.3 26.2 26.4 -2 pH 6.45 6.23 6.75 6.35 6.45 5.5-8.53 EC µS/cm 221 250 240 225 245 -4 Turbidity NTU 11.5 7.1 20.1 11.0 7.5 -5 DO mg/l 4.58 4.92 4.67 4.60 4.85 -6 Cl- mg/l 22.33 2.56 9.87 22.35 2.50 2507 Total hard mgCaCO3/l 191 202 220 195 200 5008 Ca mg/l 32.2 35.8 37.8 32.5 35.5 -9 Mg mg/l 26.5 26.9 30.2 26.6 26.9 -

10 SO4 mg/l 46.38 30.82 42.59 45.30 30.80 40011 NO2 mg/l 0.01 0.01 <0.01 0.01 0.01 1.012 NH4

+ mg/l 1.14 0.89 1.11 1.15 0.85 -13 HCO3 mg/l 267 310 329 270 305 -14 Total Silicate mg/l 23.4 23.5 21.3 23.5 23.5 -15 Silicate (glue) mg/l 23.0 21.7 18.7 23.0 22.9 -


Page 2-12

No Parameter Unit NN1 NN2 NN3 NN4 NN5 QCVN09:2008/BTNMT

16 Mn mg/l 0.22 0.16 0.07 0.20 0.18 0.517 Fe mg/l 1.53 1.16 0.46 1.50 1.20 5

Source: Institute of Tropical Biology, Dec.2007and Institute of Technical and Science on Resources and Enviroment Management Mar.2008.


DiscussionAccording to the result table, we have find the quality of underground water isvery good, however value of ammonia is high varying between 0.98 and1.15mg/l, have sign of organic pollution.

2.1.2.3 Quality of soil

The soil sample and the surface-water sample were collected at the sameposition.

Table 2-8 Analysis results for soil quality

No Parameter Unit D1 D2 D3 D4 D5 D6 D7QCVN

03:2008/TNMT

1 pH 7.35 7.31 7.60 7.38 7.18 7.40 7.36 -

2 Pb mg/kg 19.18 19.96 18.01 19.19 18.64 19.20 19.80 300

3 Cu mg/kg 16.84 18.48 16.72 20.17 18.23 17.50 18.40 100

4 As mg/kg 6.35 6.19 9.00 6.22 7.07 6.50 6.30 12

5 Cr mg/kg 19.68 17.02 15.67 19.01 15.24 18.55 16.50 -

6 Cd mg/kg 0.20 0.24 0.15 0.29 0.18 0.18 0.25 10



DiscussionAccording to the result table, we have find the quality of soil is within theranges defined for maximum allowable limits of heavy metals in the soil(QCVN 03:2008/BTNMT).

2.1.2.4 Quality of air

In December 2007, survey group had collected samples in 4 sites:- KK1: 09o42’59.88”N – 106o04’56.52”E- KK2: 09o42’16.96”N – 106o05’21.53”E- KK3: 09o41’51.45”N – 106o05’38.95”E- KK4: 09o41’29.57”N – 106o05’49.75”EIn March 2008, survey group had collected samples in 5 sites:- KK5: 09o43’39.66”N – 106o04’38.57”E


Page 2-13

- KK6: 09o41’23.11”N – 106o04’57.59”E- KK7: 09o41’23.9”N – 106o04’36.88”E- KK8: 09o41’14.42”N – 106o04’45.82”E- KK9: 09o42’33.1”N – 106o04’54.26”ESampling positions are shown in figure 2-3:

Figure 2-3 Sampling positions of air qualityAnalysis results for air quality are:

Table 2-9 Analysis results for air quality

Dust NO2 SO2 CO Temp. Humidity Windspeed

NoiselevelPosition/

parameter(mg/m3) (mg/m3) (mg/m3) (mg/m3) oC % m/s dBA

KK1 0.18 0.07 0.08 1.2 29.6 52.8 0.3 – 0.9 42 – 44

KK2 0.23 0.06 0.09 1.5 31.8 56.2 0.5 – 1.1 41 – 45

KK3 0.16 0.07 0.05 1.4 32.1 58.6 0.4 – 0.9 40 – 43

KK4 0.15 0.05 0.06 1.3 31.5 53.8 0.2 – 0.8 40 – 42

KK5 0.17 0.06 0.10 1.3 29.5 52.5 0.3 – 0.8 42 – 43

KK6 0.15 0.07 0.07 1.2 31.5 53.6 0.2 – 0.9 40 – 41


Page 2-14

Dust NO2 SO2 CO Temp. Humidity Windspeed

NoiselevelPosition/

parameter(mg/m3) (mg/m3) (mg/m3) (mg/m3) oC % m/s dBA

KK7 0.16 0.09 0.06 1.1 31.0 52.5 0.2 – 0.8 40 – 41

KK8 0.24 0.2 0.07 1.4 31.5 56.7 0.3 – 1.0 40 – 45

KK9 0.17 0.05 0.08 1.6 32.4 58.6 0.2 – 0.9 40 – 42

TCVN5937:2005 0.3 0.2 0.35 30 - - - 75*



Discussion:- Parameters on air quality meet allowed value in TCVN 5937:2005.- Noise level in the project area meets allowed value in TCVN 5949:1998.

2.1.3 Organism resources status

2.1.3.1 Aquatic organism

In December 2007, survey group had collected samples in 10 sites:- TS1: in Hau river 09°40'55.74”N - 106°06'16.96”E- TS2: in Hau river 09°41'29.93”N - 106°05'58.28”E- TS3: in Hau river 09°42'9.37”N - 106°05'37.43”E- TS4: in Hau river 09°42'49.63”N - 106°05'20.18”E- TS5: in Hau river 09°43'25.05”N - 106°05'2.02”E- TS6: in junction of Ba Sam canal and Dai Ngai river 09°43'23.45”N -

106°04'9.22”E- TS7: in Ba Sam canal 09°41'38.36”N - 106°05'12.10”E- TS8: in Ba Sam canal 09°42'11.98”N - 106°04'54.07”E- TS9: in Ba Sam canal 09°42'46.09”N - 106°04'34.19”E- TS10: in junction of Hau river and Dai Ngai river 09°43'56.41”N -

106°04'36.83”ESampling positions are shown in figure 2-4:


Page 2-15

Figure 2-4 Sampling positions of aquatic organisma. Phytoplanktonv The compositionIn this survey, 83 species have been identified; they belong to 5 phyla, 17orders, 20 families; in these phyla, the number of species among Cyanophyta,Bacillariophyta, Chlorophyta is almost the same; the number of Euglenophytais 12, a little higher than that in other areas of Hau river; most of speciespresenting here are typical in fresh water and a few species have root from theestuary as Coscinodiscus.

Table 2-10 Composition structure of phytoplankton

No. Phyla Oder Family No. species Ratio (%)1 Cyanophyta (t o Lam) 3 3 21 25.32 Bacillariophyta (t o Silic) 8 8 22 26.53 Chlorophyta (t o L c) 4 7 27 32.54 Euglenophyta (t o M t) 1 1 12 14.55 Dinophyta (t o Giáp) 1 1 1 1.2

Total 17 20 83 100

Source: Institute of Tropical Biology, 12/2007.


Page 2-16

Among phyla presenting in the research area, Cholorophyta andBacillariophyta play an important role in the food web for ecosystem. Theyare dominant and distribute in most site. However, they are sensitive toenvironment conditions; temperature of water is an element. Because theymainly distribute at 5 to 7 meter of depth or adhere on the surface of aquaticplant; whenever the temperature of water increases their living cycle isshortened and be faded faster.The number of species among sites is quite diverse and range from 38 to 49species; the highest number of species is at SH6, and the fewest number is atSH3 (Table 2-11).v The density of phytoplankton (cells/liter)

Table 2-11 Density and dominant species of phytoplankton in theresearch area

Sites No.species

Density(cells/l)

Dominant species Density of Do.species (cells/l)

Dominant ratio(%)

TS1 41 117,080 Microcystis aeruginosa 99,840 85.28



TS4 41 282,044 Microcystis aeruginosa 246,133 87.27TS5 40 202,191 Microcystis aeruginosa 177,833 87.95


TS7 42 420,176 Microcystis aeruginosa 392,000 93.29TS8 46 251,125 Microcystis aeruginosa 225,333 89.73



Source: Institute of Tropical Biology, 12/2007.Note: Sampling positions are shown in figure 2-4.

In the table 2-11 show: the density of phytoplankton among sites range from117,080 to 490,050 cells/liter; the highest density is at TS6 and the fewestdensity is at TS1; the dominant species at all sites is cyanobacteria Microcystisaeruginosa, its dominant ratio is quite high from 80 to 90 % among sites; thisration is over 90% at TS2, TS3, TS6 and TS7.In which, the high density mainly causes by the good growth of cyanobacteria,which well occupy in polluted water; whereas, the density of other phyla islow, event many species belonging to Bacillariophyta and Chlorophyta onlysee in the qualitative samples not in the quantitative samples. This problemindicate that water environment in the research area is eutrophic; only speciesthat well occupy in eutrophic water grow well.v Biodiversity index of phytoplankton- Margalef biodiversity index (d): 2.9 – 3.6- Shanon-weiner biodiversity index (H’): 0.3 – 0.8


Page 2-17

Table 2-12 Biodiversity index of phytoplanktonBiodiversity index

Sited H'

TS1 3.3 0.7TS2 3.1 0.5

TS3 2.9 0.6

TS4 3.2 0.6TS5 3.2 0.7

TS6 3.7 0.3

TS7 3.2 0.4

TS8 3.6 0.5TS9 2.9 0.7

TS10 3.5 0.8

Source: Institute of Tropical Biology, 12/2007.Notes: d: Margalef biodiversity index; H’: Shanon-weiner biodiversity index

Remarks:- The biodiversity index (d) for phytoplankton is higher than 3 at most sites.

This reflects the rich of nutrition and the diverse of water sources frominternal canal and from the sea.

- The Shanon-weiner (H’) diversity index for zooplankton and zooplanktonat the research area is low. Because the cyanobateria, that include toxicspecies, are dominant at all sites with high ratios. Those species havecontrolled the growth of other species. Therefore, the diversity index (H’) islow. Base on the water quality table, the water quality for research sitesranges from pollution (H’ from <1).

b. Zooplanktonv The compositionFrom survey in December 2007, 29 species of zooplankton had been recordedin the research area; they belong to 5 groups: Rotatoria, Cladocera, Copepoda,Ostracoda and Larva.In general, the zooplankton fauna in Hau river, Long Phu thermal plant and BaSam canal area is middle diversity; Rotatoria is dominant with 9 speciesoccupying 31.0%; the next group is Cladocera with 8 species occupying27.6%; the other groups have from 1 to 6 species occupying from 3.4 to 20.7%(Table 2-13).The coposition includes species that are typical in fresh water; some speciespresenting indicate the water environment is aluminiferous as Kurzialongirostris, Ilyocryptus halyi (Cladocera): Polyathra vulgaris, Lecane luna(Rotatoria), Mesocyclops leuckarti (Copepoda), Copepoda nauplius (Larva).


Page 2-18

Table 2-13 Composition of zooplankton in the research area

No. Groups No. species Ratio (%)1 Rotatoria (luân trùng) 9 31.0

2 Cladocera (giáp xác râu ngành) 8 27.6

3 Copepoda (giáp xác chân chèo) 5 17.2

4 Ostracoda (giáp xác có v ) 1 3.4

5 Larva ( u trùng) 6 20.7

Total 29 100


Figure 2-5 Composition structure of zooplankton in the research areav Density of zooplanktonThe density of zooplankton among sites ranges 3,000 – 33,000 inds/m3. Thedensity at sites from TS1 to TS4 and TS6 is higher than that in the other sites(Table 2-14).Table 2-14 Density and dominant species of zooplankton in the research

area

Sites Dominant species No. species Density(inds/m3)

Density ofDo. species Ratio (%)

TS1 Copepoda nauplius 10 25,000 12,000 48.0

TS2 Bosmina longirostris 14 21,000 7,000 33.3

TS3 Mesocyclops leuckarti 14 37,500 10,500 28.0






Page 2-19

Sites Dominant species No. species Density(inds/m3)

Density ofDo. species Ratio (%)



TS10 Neodiaptomus botulifer 12 20,500 5,500 26.8


Figure 2-6 Variation of density among sitesIn general, the density of zooplankton is mainly from species such as Bosminalongirostris, Bosminopsis deitersi (Cladocera), Mesocyclops leuckarti(Copepoda) and Copepoda nauplius (Larva); they distribute among sites fromTS1 to TS10; their density is much higher than that of other species.The dominant species is Copepoda nauplius, Mesocyclops leuckarti andNeodiaptomus botuli; their dominant ration is from 35 to 60%; the dominantspecies indicate that the water environment is eutrophic; Copepoda nauplius isdominant at 5/10 sites; Mesocyclops leuckarti and Neodiaptomus botulifer aredominant at TS8, TS9 and TS10.Therefore, the results of composition, density and dominant species ofzooplankton at 10 sites in the Long Phu thermal plant, Soc Trang provinceshow that:- The diversity of zooplankton fauna is middle.- Most of species recorded are well occupying in eutrophic environment.- Species belonging to Copepoda, Cladocera and their larvae have high

density; they play an important role in the food chains.v Biodiversity index of zooplankton- Margalef biodiversity index (d): 0.89 – 1.53


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- Shanon-weinner biodiversity index (H’): 1.09 – 1.96Table 2-15 Biodiversity index of zooplankton

Biodiversity indexSite

d H'

TS1 0.89 1.57

TS2 1.31 1.54

TS3 1.23 1.96

TS4 1.37 1.40

TS5 0.99 1.09

TS6 0.97 1.61

TS7 1.12 1.66

TS8 1.41 1.85

TS9 1.53 1.60

TS10 1.11 1.94


Note: d: Margalef index; H’: Shanon-weiner index

Remarks:- The biodiversity index of zooplankton is not high, it lower than 2 at most

sites; the growth of zooplankton much depends on the turbidity and theconvection of water.

- Shanon-weiner (H’) index of of zooplankton is low (0.89 – 1.53)c. Zoobenthosv The compositionThe composition of benthic macroinvertebrates around area of Long Phuthermal power plant collected in December, 2007 includes: 40 species of 7phylum Mollusca-gastropoda, mollusca-bivalvia, annelida-polychaeta,annelida-oligochaeta, crustacea-isopoda, crustacea-amphipoda, aquaticentomology of insecta and larvae.The total species of mollusca phylum has value highest in this survey collected20 species per 40 species in all sites sample (50%), then oligochaeta classcollected 8 species (20%) in this survey. The Isopoda, Amphipoda, Aquaticentomology (insecta) and larvae has total of species fluctuated from 2 to 4species per sites sample (5% to 10%). The total species of Oligochaeta classhas value lowest in this survey with 1 species collected per site sample (table2-16, figure 2-7).


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Table 2-16 Composition of benthic macroinvertebrates in the researcharea

No. Taxa No. species (%)1 Gastropoda 11 27.52 Bivalvia 9 22.53 Polychaeta 8 20.04 Oligochaeta 1 2.55 Isopoda 4 10.06 Amphipoda 2 5.07 Aquatic insecta 2 5.08 Larva 3 7.5

Total 40 100


Figure 2-7 Percent of benthic macroinvertebrates in research areaNotes: Gas-: Gastropoda Poly-: Polychaeta Iso-: Isopoda

Biv-: Bivalvia Oligo-: Oligochaeta Am-: Amphipoda

Aqua-: Aquatic insecta Lar-: Larva

v The density and dominant species in each sampling siteThe density of benthic macroinvertebrates in each sites sample was changedfrom 40 to 510 individuals per square meters (inds/m2). The density ofzoobenthos in TS-10 site sample was highest with 510 inds/m2 collected andlowest in TS-5 sampling station (40 inds/m2). The density of dominant speciesin area survey high (changed 22% to 80% species per each site sample). In theTS- 9 and TS-6, the dominant species has total individuals in each site high(74.1% to 80%), some dominant species in survey area: Haploscoloploselongatus, Amphipoda larva.


Page 2-22

Table 2-17 Density and dominant species in each sampling site

Site Dominant species No.species

Density ofdominant

species(inds/m2)

Density

(inds/m2)

(%)

dominantspecies

TS1 Haploscoloplos elongatus 6 30 110 27.3

TS2 Namalycastis longicirris 7 40 120 33.3

TS3 Nerita sp 7 50 130 38.5

TS4 Dero sp 3 30 60 50.0

TS5 Namalycastis longicirris 3 20 40 50.0

TS6 Amphipoda larva 6 200 270 74.1

TS-7 Namalycastis longicirris 7 60 120 50.0

TS8 Corbicula tenuis 10 50 220 22.7

TS9 Haploscoloplos elongatus 2 40 50 80.0

TS10 Melanoides tuberculatus 13 70 510 13.7


The composition of dominant species in each site sample are Oligochaetaphylum (Haploscoloplos elongatus, Namalycastis longicirris), Molluscaphylum (Corbicula tenuis, Melanoides tuberculatus), and another site samplesthere Dero sp and Amphipoda were the dominant species.

Figure 2-8 Percent of dominant species per total individuals in each sitev Biodiversity index of Zoobenthos

Table 2-18 Biodiversity index of Zoobenthos(d-Margalef index and H’-Shannon-Wiener ndex)


d H'

TS1 2.5 1.8

TS2 2.4 1.8


Page 2-23


d H'

TS3 2.3 1.7

TS4 1.1 1.0

TS5 1.4 1.0

TS6 1.8 1.0

TS7 2.4 1.6

TS8 2.9 2.2

TS9 0.6 0.5

TS10 3.6 2.6


Discussion:- The diversity d-Margalef index of benthic macroinvertebrates in survey

area changed from 0.6 to 3.6. In TS10 and TS8 sampling station werediversity and highest in TS10 (d-Margalef =3.6) then in the TS1 to TS4 andTS7 has d-margalef index changed from 2.3 to 2.5. Otherwise, the TS9sampling station has value diversity was lowest (d-margalef=0.6) (table 2-18).

- The Shannon-Wiener H’ index in sampling sites changed from 0.5 to 2.6(table 2-20) and the same with d-margalef index. In sites sample has valueof D-margalef high so H’-Shannon-Wiener high. The quality of waterinvironment in bottom in most of sampling sites was polluted, specially inTS8 and TS10 pollution level is lower than another sites.

2.1.3.2 Fish fauna

v Fish compositionThe survey in 12-2007, 37 fish fauna species, 26 families, 9 orders wererecorded in the Long Phu 1 Thermal Power Plants. They were being in orderto taxonomy system of Eschmayer, 1998 and FishBase 2000, and update newinformation from Internet (table 2-19).With 37 fish fauna species in above, the most biodiversity is Perciformes order(14 species, 37.84% of total species). Next is the Siluriformes order (7 species,18.92% of total). Cypriniformes order has 5 species (13.51%). And 1-3species in the others order (2.70 – 8.11%).There are 11 economic fish fauna species in the area. Some species such asPangasius krempfi, Periophthalmodon schlosseri, Polynemus paradiseus, etc.were high exploitation.There are 21 freshwater fish and 16 salty fish species. The difference betweenfreshwater and salty fish is not typical because many freshwater fish speciescould live in salty and some salty fish are also living in freshwater such as:Pangasius krempfi, Polynemus paradiseus, Plotosus canius, Arius sciurus, etc.v Comments:


Page 2-24

- Biodiversity: with 37 species were recorded so that the Long Phu ThermalPower Plants have quite biodiversity of species, family and order.It is change between fresh and salty water in the dry and rainy season in theLong Phu Thermal Power Plants area, freshwater in the rainy season and saltywater in the dry season. So, the freshwater fish live in rainy season and saltyfish live in dry season in the Long Phu Thermal Power plants area. Thecharacteristic make biodiversity of species in the project area. Fish fauna willchange if the polluted environment happens in the project area.- Migration: exchange of water between dry and rainy season: freshwater ismainly in the rainy season and salty water in dry season. The exchange ofwater made to get used to fish species in the project area. The freshwater fishmigrate into project area and live in there in the rainy season. Contrary, saltyfish migrate into this area in dry season.The exploited fish species are also depend on season. So, we should evaluatesource of fish both dry and rainy season.Some species could live in this area all year around. These species can bearhigh amplitude of salt in water. Example: Plotosus canius, Anabas testudineus,Channa striata, etc.- Economy: there are 11 economic fish were recorded in the project area inDecember, 2007. Some species of economic fish is species which depend onthe season. It means that: exploitation of these species depend on season. So,any pollution in the project area could impact on these fish.Table 2-19 List species of fish were recorded in the Long Phu 1 Thermal

Power plant in 12-2007NOTICE

NO. VIETNAMESE NAME SCIENTIFIC NAME Economicfish

Freshwater fish

salty

I ORDER: CÁ THÁT LÁT OSTEOGLOSSIFORMES1 Family: cá thát lát Notopteridae

1 Cá thát lát Notopterus notopterus (Pallas, 1780) *II ORDER: CÁ TRÍCH CLUPEIFORMES

2 Family: cá trích ClupeidaePhân h cá c m sông Pellonulinae

2 Cá c m sông Corica sorbona Hamilton, 1822 * *3 Family: cá tr ng Engraulidae

3 Cá m gà Coilia lindmani Bleeker, 1858 *III ORDER: CÁ CHÉP CYPRINIFORMES

4 Family: cá chép Cyprinidae4 Cá mang Puntius orphoides (Valenciennes, 1842) *5 Cá mè vinh Barbonymus gonionotus (Bleeker, 1850) *

Phân h cá trôi Labeoinae6 Cá mè hôi Osteochilus melanopleurus (Bleeker, 1852) *

Phân h cá chép Cyprininae


Page 2-25

NOTICE


Freshwater fish

salty

7 Cá d nh Puntioplites proctozysron (Bleeker, 1865) *5 Family: cá ch ch Cobitidae

Phân h cá ch ch Cobitinae8 Cá khoai Acantopsis choirorhynchos (Bleeker, 1854) *IV ORDER: CÁ NHEO SILURIFORMES

6 Family: cá l ng Bagridae *9 Cá ch t v ch Mystus rhegma Fowler, 1935 *10 Cá ch t s c Mystus vittatus (Bloch, 1794) * *

7 Family: cá tra Pangasiidae11 Cá tra nuôi Pangasius hypophthalmus (Bleeker, 1878) *12 Cá bông lau Pangasius krempfi Fang and Chaux, 1949 * *13 Cá sát s c Pangasius macronema Bleeker, 1851 *

8 Family: cá trê Clariidae14 Cá trê tr ng Clarias batrachus (Linnaeus, 1785) *

9 Family: cá úc Ariidae15 Cá úc tr ng Arius sciurus Smith, 1931 * *

10 Family: cá ngát Plotosidae16 Cá ngát Plotosus canius (Hamilton, 1822) * *

V ORDER: CÁ CÓC BATRACHOIDIFORMES11 Family: cá m t qu Batrachoididae

17 Cá m t qu Allenbatrachus grunniens (Linnaeus, 1758) *VI ORDER: CÁ NHÁI BELONIFORMES

12 Family: cá lìm kìm Hemiramphidae18 Cá lìm kìm Zenarchopterus clarus Mohs, 1926 *19 Cá lìm kìm sông Zenarchopterus ectuntio (Hamilton, 1822) *VII ORDER: CÁ MANG LI N SYNBRANCHIFORMES

13 Family: cá l ch ng Synbranchidae20 L n ng Monopterus albus (Zuiew, 1793) * *

14 Family: cá ch ch sông Mastacembelidae21 Cá ch ch lá tre Macrognathus siamensis Gunther, 1861 *VIII ORDER: CÁ V C PERCIFORMES

15 Family: cá ch m Centropomidae * *22 Cá ch m Lates calcarifer (Bloch, 1790)

16 Family: cá s n Ambassidae23 Cá s n x ng Ambassis gymnocephalus (Lacepède, 1802) *

17 Family: cá s u Sciaenidae24 Cá s u Nibea soldado (Lacepede, 1802) *

18 Family: cá nh Polymenidae25 Cá phèn vàng Polynemus paradiseus Linneus, 1758 * *

19 Family: cá h ng Coiidae


Page 2-26

NOTICE


Freshwater fish

salty

26 Cá h ng Datnioides microlepis (Bleeker, 1853) *

20 Family: cá rô phi Cichlidae27 Cá rô phi r n Oreochromis niloticus niloticus (Linnaeus,

1758)* *

21 Family: cá b ng en Eleotridae28 Cá b ng d a Oxyeleotris urophthalmus (Bleeker, 1851) *

22 Family: cá b ng tr ng GobiidaePhân h cá b ng tr ng Gobiinae

29 Cá b ng cát t i Glossogobius giuris (Hamilton, 1822) *30 Cá b ng cát tr ng Glossogobius sparsipapillus Akihito &

Meguro, 1976*

Phân h cá b ng kèo Oxudercinae31 Cá b ng kèo Pseudapocryptes elongatus (Cuvuer, 1816) * *32 Cá thòi lòi Periophthalmodon schlosseri (Pallas, 1770) *33 Cá b ng sao Boleophthalmus boddarti (Pallas 1770) *

23 Family: cá rô ng Anabantidae34 Cá rô ng Anabas testudineus (Bloch, 1792) * *

24 Family: cá lóc Channidae35 Cá lóc Channa striata (Bloch, 1797)IX ORDER: CÁ B N PLEURONECTIFORMES

25 Family: cá b n s c Soleidae36 Cá l i lá mít Euryglossa panoides (Bleeker, 1851) *

26 Family: cá b n cát CynoglossidaePhân h Cynoglossinae

37 Cá b n l i trâu Cynoglossus lingua Hamilton, 1822 *11 21 16


2.1.3.3 Plant biota

a. Spatial structure of landscapesFollowing landscape ecologists, the proposed project area includes four basicterms of spatial structure on landscape (figure 2-10):Matrix: the land cover that is dominant and interconnected over the majorityof the land surface, the matrix in this area is rice fields, and gardens.Patch: a nonlinear area (polygon) that is less abundant than, and different fromthe matrix, Patch in this area includes patches of natural brushes, orchards,vegetable gardens, grass lands, ponds, and patches of habitats.Corridor: a special type of patch that links other patches in the matrix.Typically, a corridor is linear or elongated in shape, corridors in the projectarea includes natural vegetation corridors along the Song Hau River and along


Page 2-27

canals on field, rows of street trees along local trailsMosaic: a collection of patches, none of which are dominant enough to beinterconnected throughout the landscape, such as pieces of bare land, pieces ofgrass, and fruit trees, burial mounds.

Table 2-20 Composition of plant

No. Spatial structures oflandscape

Elements

1. Matrix Rice field

Garden

Natural water-flooding brushs

Natural forest

2. Patch

Natural brushs

Orchards

Ponds

Residential area

3. Corridor

Natural vegetations along river and canals

Rows of street trees along local roads

Canals

4. Mosiac

Vegetable garden

Ponds

Shade – trees

Burial mounds


Figure 2-9 Structure of main vegetation


Page 2-28

Figure 2-10 Map of vegetationThe vegetative coverages in the proposed area of Long Phu 1 Thermal PowerPlant are no longer natural vegetations, almost of area in this area are plantedtrees. The remains of natural plants locate on narrow rows along riverside ofHau River, and canals on fields, species of natural plants include Sonneratiaalba, Nypa fruticans, Aglaodorum griffithii, Acanthus ebractea, Derristrifolia. Some places along canals on field and local roass, there are species of


Page 2-29

grass Saccharum arumdinaceum, Phragmites vallatoria, Cyperus spp., andspecies of wood trees Samanea saman, Nauclea officinalis, Ficusmicrocarpa...Almost of the project area are rice pads. Street trees include Eucalyptus sp.,Acacia auriculiformis, ... Shade trees surrounding habitats include Ceibapentandra, Termanalia catappa, Erythrina variegata, Muntingia calabura,..Fruit trees surrounding habitats and in orchards include Cocos nucifera, Arecacatechu, other fruits. Ornamental plants are Hibicus rosa-sinensis, Ochnaintegerrima, Wrightia religiosa, Caesalpinia pulcherrima…

b. The floraAccording to result of the survey in 12/2007, at surrounding/in the proposedproject area, there area about 227 species of plants of 71 families.

Table 2-21 The flora of the proposed project area

TAXON FAMILIES SPECIES

q POLYDIOPHYTA Khuy t th c v t 4 6

q DICOTYLEDONAE Th c v t hai lá m m 56 171

q MONOCOTYLEDON Th c v t m t lá m m 11 50

Total 71 227


b1. Natural vegetationNatural forestIn the project area there is no natural forests, natural forests such as Sonneratiaalba remains on some islets on Hau River, and natural mangrove forestsremains at estuary of Hau River.Natural water-flooding brushsIn the project area, there is not large areas of naturals wetlands, only smallareas scatter on fields as almost areas are rice pads, gardens, habitats andalong canals, river. The species of wetland include Saccharum arumdinaceum,Phragmites vallatoria, Polygonum tomentosum, Scirpus grossus, Cyperuselatus, Cyperus halpan, Cyperus polystachyos, Panicum repens, Acrostychumaureum, Derris trifolia, Aglaodora griffithii, Eleocharis dulcis, Aeschynomeneaspera, Nelumbo nucifera, Nymphaea pubescens, Ceratophyllum dermesum...Natural brushesSome places along riversides, canals, local trails, surrounding rice-pads, ingardens, habitats, and bare lands, there are a lot of brush – patch includingwood trees, grasses and brushes. Dominant species are Nauclea officinalis,Morinda citrifolia, Sonneratia alba, Termanalia catappa, Melaleuca cajuputi,Saccharum arumdinaceum, Erianthus arundinaceus, Lygodium flexuosum,Bulbostylis bacbata, Cyperus halpan, Euphorbia hirta, Cyperus dubius,Ageratum conyzoides, Eupatorium odoratum, Eclipta prostrata,Dactyloctenium aegyptiacum, Cleome chelidonii, Synedrella nodiflora,Centella asiatica, Alternanthera sessilis, Panicum repens, Alternanthera


Page 2-30

tricolor, Sida acuta, Passiflora foetida, Blumea lacera, Cassia alata,Phyllanthus reticulatus, Heliotropium indicum, Phyla nodiflora, Desmosdiumtriforum,..Corridors of natural vegetationAlong Song Hau river and canals in field, there are associations of aquatic andsemi-aquatic plants including Nypa fruticans, Aglaodora griffithii, Acanthusebracteatus, Eichhornia crassipes, Monochoria hastata..On riverside there arenatural wood trees such as Sonneratia alba, Terminalia catappa, Callophylluminophyllum, Samanea saman, Ficus racemosa, Ficus microcarpa, Naucleaofficinalis,..and some of planted trees such as Ceiba pentandra, Eucalyptussp., Acacia auriculaeformis..These corridors have an important role in protecting river/canals banks fromerosion; shading; providing firewood and wood for utility furniture, andhabitats for wildlife such as birds, fishes, reptilia..b2. Artificial vegetationGardens and orchardsOn higher land than rice-pads, farmers plant many kinds of fruits such asguava (Psidium guiava), plum (Syzygium semarangense), mango (Mangiferaindica), longan (Dimocarpus longan), orange (Citrus sinensis), lemon (Citrisaurantifolia), pomelo (Citris grandis), banana (Musa spp.), star apple(Chrysophyllum canito), coconut (Cocos nucifera), jackfruit (Ariocarpusheterophyllus), soursop (Annona muricata)…Besides fruit trees, farmers plant some of shade trees such as Ceiba pentandra,Acacia auriculiformis, Samanea sama, Callophyllum inophyllum, Eucalyptussp., Terminalia catappa for shading and utility furniture, firewood..Vegetable gardenAt wrong time for rice culture, on rice pads and bare lands suroundinghabitats, famers sometimes plant some of vegetable such as tomato(Lycopersicon esculentum), cabbage (Brassica integrifolia), capsicum(Capsicum frutescens), bitter melon (Momordica charatia), cucumber(Zehneria indica), waxy pumpkin (Benicasia hispida), bean (Vigna spp.)..Garden of many fruit treesThis is speific landscape in the Mekong river delta area.Rice fieldsOn rice pads, besides rice, there are many species of grasses such asFimbristylis sieberiana, Cyperus elatus, Commelia paludosa, Echinochloacrus-galli, Echinochloa procera, Polygonum hydropiper and some of aquaticplants Pistia tratiotes, Salvinia cucullata..PondsSurrounding habitats, famers sometimes dig ponds and ditches for aquacultureand keep water for supplying water to planted trees on dry season. Species of


Page 2-31

plants surrounding ponds include Salvinia cucullata, Ceratophyllumdemersum, Myriophyllum dicoccum, Utricularia aurea, Pistia stratioites,Marsilea quadrifolia, Polygonum tomentosum, Nelumbo nucifera, Nymphaeasp., Ludvidgia octovalvis., Aniseia martinicensis, Impomoea aquatica,Eichhornia crassipes, Monochoria hastata.Residential areaAlmost of habitat area located along riverside, canals and local trails, roads.Common species of planted trees for shading and streets include Terminaliacatappa, Samanea saman, Sesbania grandiflora, Cocos nucifera, Arecacatechu, Acacia auriculaeformis, Eucalyptus sp.,Tamarindus indica, Delonixregia, Peltophorum pterocarpum, Nauclea officinalis, Hopea odorata,Dipterocarpus alatus,..and some of ornamental trees such as Hibicus rosa-sinensis, Ochna integerrima, Wrightia religiosa, Caesalpinia pulcherrima…Remarks:- The highest diversity index is at natural brushes and the lowest is at rice

field.- The dominant index is highest at rice field and the lowest is at natural

water-flooding brushs, natural brushes and residential areas.

Rousts of surveys (*) 1 2 3 4 5 6 7

Total of individual 297 292 238 244 251 261 305

Number of species 89 91 78 80 67 78 88

Ordinal number 5 6 2 3 1 2 4

Diversity index 5.164 5.325 5.056 5.121 4.229 4.828 5.039

Ordinal diversity 2 1 4 3 7 6 5

Dominant index 0.013 0.013 0.015 0.016 0.018 0.015 0.013

Ordinal dominant 4 4 3 2 1 3 4

Source: Institute of Tropical Biology, 12/2007.Notes: (*)(1) Natural water-flooding brushs(2) Natural brushes(3) Corridors of natural vegetation(4) Gardens and orchards(5) Rice fields(6) Ponds(7) Residencial area

2.1.4 Natural resources

Mineral resourceMineral in Soc Trang is mainly sand in Hau river, available in islandcommunes at the end reach of Hau river. The amount of sand is exploited forexcavating and filling in construction work, yearly capacity from 200 to 300million cubic meters (m3).


Page 2-32

In construction phase, project does not use mineral resources of area. Inoperation phase, the project will use imported coal resources.

Landuse existing and planningAs specific of an area in Mekong Delta, project area has some certainadvantages in exploitation, processing, aquaculture, especially agriculture etc.This has been shown through the following landuse existing.

Table 2-22 Existing landuse in project area – Long Duc commune

Unit: haLo i hình s d ng t Scale Long Phu district

Total of natural area 100% 2961,78

Agricutural land 69.27% 2051.61

Non-agricutural land 29.11% 862.31

Unused land 1.62% 47.86

Source: Statistic of Long Duc People Committee Commune , 2007.

Analysising existing landuse permits to consider appropriate ability of projectto develop economics and to strengthen environmental protection forecological sensitive area.Land of households in project area have them own rights. Most of them hadland use rights already before liberation; others had land use rights bytransferable purchase from person to person.Region is affected salty in dry season so that agricultural productivity is nothigh. Conversion of land use purpose from agricultural to industrial land is inaccordance with actual conditions and contributes to promote developingeconomic area. However, implementing project will affect lives, economy of afew households with required land.

Water resourceSoc Trang province has quite abundance water resource, including surfacewater and underground water. Surface water is supplied by Mekong Deltasystems, it is ensured sufficiently water for irrigation, domestic animal andliving of the locals. With bayshore advantage, Soc Trang province has veryabundant aquatic resources with fisheries are plenty seafood, with farmingaquaculture and catching, etc., has bought great economic profit for the locals.Besides surface water, underground water has great potential. Although this isa coastal province has large salinity area but underground water at littoral zonefrom the larger 80meter deepth has good quality, ensure for local demand.In operation phase project will collect surface water from Hau river forcooling. It will reduce a small part of capacity and aquaculture resources inHau river.

2.2 SOCIO-ECONOMIC CONDITIONS

2.2.1 Social status of the project area


Page 2-33

Population – labourThe project is located at Long Duc commune, Long Phu district, Soc Trangprovince. According to statistic in November 2007, data of land andpopulation of Long Duc commune are shown as below.Total of natural area: 2,961.78 ha. In there:- Agricultural land: 2,051.61 ha;- Non-agricultural land: 862.31 ha;- Unused land: 47.86 ha.This commune has 2,095 households with 10,551persons, in there 5,378 malesand 5,173 females. Total of group over 14-years-old is 8,740 person.Resident commune earn for living mostly by agriculture (67.9%), trade(12.5%), transport (5.5%) and other industries such as aquaculture, smallindustry, construction and services.From November 5th 2007 to November 11th 2007 and from December 17th

2007 to December 22nd 2007, PECC3 surveyed, investigated socio-economicstatus of PAHs in the proposed area building Long Phu Power Complex(including Long Phu 1 Power Plant), results are listed here:• Sex component

- Male- Female

47.15 %52.85 %

• Age groups

- Under 6 years of age 8.88 %

- From 7 to 17 years of age 17.06 %

- From 18 to 60 years of age 67.54 %

- Over 60 years of age 6.51 %

• Householder

- Male 73.87%

- Female 26.13 %

• OccupationFarmers and hired farmers 40.23 %

Dealers 2.83 %

Small scale industry 19.33 %

Non-stability occupation 1.56 %

Others (jobless, supported special, homemaker, the old,children, etc.) 36.04 %

• IncomeAverage annual income 2,399,018 VND/HH/monthMaximum average income 20,000,000 VND/HH/month


Page 2-34

Minimum average income 100,000 VND/HH/monthAverage income under 1,000,000 VND/month 16.86 %Average income from 1,000,000 to 2,000,000 VND/month 47.27 %Average income from 2,000,000 to 3,000,000 VND/month 15.44 %Average income from 3,000,000 to 4,000,000 VND/month 5.23 %Average income over 4,000,000 VND /month 15.20 %

• AmenitiesWater-closet 49.18 %Well 66.05 %Motorbike 43.95 %Bicycle 44.90 %Power meter 72.94 %Wherry/ Boat 22.81 %Television 68.90 %Fridge 10.22 %Washing machine 2.38 %Telephone 23.05 %

Socio-economic investigating result of 637 PAHs shows people in age of workoccupied mostly (67.54%), main occupation which is affected mostly whenimplementing project is agriculture (40.23%), other jobs are not affected orhave positive impact from the project as traders.According to national standard is enacted by the Prime Minister in Decision170/2005/QD-TTg, income of household which is classified as poor is200,000 VND/ person/month in rural areas. Thus, the number of poorhouseholds in project area is quite large (20% of HHs has average incomelower than 200.000dong/person/month). Implementing project will contributeto develop socio-economic area, improve standards of living and create jobsfor the locals.

HealthThe whole commune has one medical station, is assessed quite quality.Project area has no disease or it is treated well, effective as soon asappearance.

Culture,history, sportUpgradding, reparing 03 broadcasts to serve holidays during year.Surveying, readmiting 03 cultural village, recognizing 01 new advancedresidential area with 1,804 households reach standard of cultural family, 83.9%of the target.The whole commune has 02 communal houses, 01 temple and 03 pagodas.This commune has no historial monument.

EducationCommune has three primary schools and two secondary schools at present.


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According to result of investigating socio-economic project area (November,2007) educational background of the locals are shown as below:

Illiterate 8.47 %

Reading/writing 3.62 %Primary/secondary school 71.63 %High school 14.49 %

Intermediation 0.33 %

University / college 1.45 %

2.2.2 Economic status of the project area

IndustryCurrently, activities of industrial production at Long Duc commune is notreally developed. There are 56 industrial production bases at commune, all areindividual business. Main industrial products in region are brick, husking, cansugar, saw-milling, confectionery, etc.Agriculture- Rice: yearly cultivated area 2,487.7ha, average production 6 tons/ha, reachs

capacity 14.926 tons;- Area of crops: 175 ha;- Area of tree fruits: 470.47 ha;- Other trees: 120.000 trees;- Breeding: commune prevented in time avian influenza outbreaking in

province, supported losses and have had developed breeding. Especiallyaquiculture has high development speed, is mainly intensive fish pond andunintensive one.

TransportationTransport system in region has not developed completed, is mainly waterway.Implementing project will have positive impact on development of roadsystem and waterway in Long Phu district in particular and Soc Trangprovinces in general.

Service, tradeActivities of commerce, trade, service in project area has not really developed.Main products of trade, exchange are agricultural products andvegetables.Therefore, when project is constructed and operated will stimulateto develop trade, services and entertainment. Implementing project will havepositive impact on development industry, agriculture, traffic, service and tradein region.


Page 3-1

CH NG 3CHAPTER 3: ENVIRONMENTAL IMPACT ASSESSMENT

3.1 IMPACT ASSESSMENT

Land clearance and investment of infrastructure (including tenement andstaffs, resettlement area for the project affected peoples or displaced persons,etc.) for Long Phu Thermal Power Complex belong to the Infrastructure ofLong Phu Thermal Power Complex project. Thus, Long Phu 1 TPP isconsidered to be constructed on cleared area, there are no impacts caused byland clearance, resettlement, etc. in pre-construction phaseIn construction and operation phases, the project will cause some impacts onnatural environment and socio-economic situation.

3.1.1 Impact sources

3.1.1.1 Impact sources related to waste

Table 3-1 Impact sources related to waste

No. Causes ofimpacts

Objects ofimpacts Impact assessment

Impactsthat relateto waste

Level ofimpact

1 Construction phase

Airenvironment

Noise, dust and exhaust gas from vehicles,machines and equipments.

Yes Medium

Temporary

1.1 Activities ofmachines andequipmentsforconstructionandtransportation

Waterenvironment

Leakage oil and eliminated oil from vehicles andmachines can cause surface water pollution, inparticularly rainy season.

Yes Low

Temporary

Airenvironment

Reek caused by dredging is from mud containingCO2, H2S, CH4, etc.

Port construction need to be consolidated pilefoundation. A large number of pile foundationswill be drove in river, so noise and vibrationcaused by the activities is considerable (more than110dBA).

Yes Medium

Temporary

Soilenvironment

Quantity of dredging mud is about 500,000m3.

Leakage oil and eliminated oil from vehicles andmachines can cause pollution of soil environment

Yes Low

1.2 River beddredging andportconstruction

Waterenvironment

River bed dredging in large scale will impact onriver water quality as: increase in turbidity andaccumulated matters.

Yes Low

1.3 Constructionworks of theproject

Airenvironment

Construction activities will cause noise and dustwhich impact on air quanlity of the project area.

Yes Low

Temporary


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Level ofimpact

Water and soilenvironments,aquatic life

At construction site, excavation, concrete mixing,… rain water sweep away sand, stone, constructionwaste into adjacent streams. This increasesturbidity, water pollution, soil erosion andsedimentation in downstream, and impact onaquatic ecosystem.

Leakage and residual oil from machines andequipments can cause soil and water pollutions, ifthey are not collected and disposed in appropriateplaces.

Yes Low

Temporary

Naturallandscape

Construction waste is mainly soil, stone, scrapiron, cement bag and scrap timber. If they are notdisposed in appropriate place, they will impact onnatural landscape of the area.

Yes Medium

Temporary

1.4 Workersconcentration

Water and soilenvironments,naturallandscape andpublic health

Domestic solid waste from 1,000 workers atconstruction sites which is not collected anddisposed in appropriate places, will impact onnatural landscape of the area and cause soil andwater environments (water leaks out from dumpinggrounds, be carrier of a disease and difficult totreat).

Average volume of domestic wastewater isestimated by 80% water supply water consumption(about 120liters/day/person). This waste water cancause water pollution if it is not treatedappropriately.

Domestic waste water contains a lot of microbes,in case of discharging directly to the environment(Hau River), it will spread diseases to inhabitantsusing water in downstream.

Yes Medium

1.5 Fire safety,work andtrafficaccident

Constructionworkers,local people

Leakage oil and fuel can cause fire and explosion.However, the risk is very small because functionalpartitions will be planned separately and there arespecific preventive measures.

Yes Low

2 Operation phase

2.1 Cooling waterdischarge

Waterenvironment

There is residual chlorine in cooling water butlower than Vietnamese Standard and automaticallymonitored. So, this impact is insignificant.

Yes Insignificant

2.2 Industrial anddomesticwastewater

Waterenvironment

Wastewater will be collected and treated to meetVietnamese Standard before discharging. So, thisimpact is insignificant.

Yes Low

2.3 Exhaustemission

Airenvironment

Exhaust gas with NOx, SO2, dust and CO by fuelcombustion will impact on air quanlity.Calculation results from emulation of emission ofpolluted air by atmospheric dispersion model wasalso demonstrated that these content of polluted airmeet Vietnamese Standard. So, impacts of exhaustemission are insignificant.

Yes Low

Airenvironment

Coal reception, transportation and storage will emitdust which impacts on ambient air quanlity.

Yes Medium2.4 Coal pick-up,transportationand storage Water Spraying water to limit dust in coal storage and Yes Medium


Page 3-3




Level ofimpact

environment washing coal belt will cause wastewater which willimpact on surface water if it is not collected andtreated appropriately.

2.5 Ash collectionand discharge

Airenvironment

Dust caused by transportation of fly ash (dry ashwill be consumed by cement factories) and ashexploitation activities of local people in the ashpond.

Yes Low

Waterenvironment

Domestic wastewater from activities of workerswill be collected and treated to meet VietnameseStandard before discharge in order to ensure not tocause pollution of water resource.

Yes Medium

2.6 Activities ofoperationworkers

Soilenvironment

Domestic solid waste will be collected disposed atappropriate places in order to ensure not to causepollution of soil environment.

Yes Low

2.7 Productionwastedischarge

Water, soiland airenvironment

Production waste consists of ash, solid residuefrom boiler washing and wastewater treatmentsystem, grease, etc. They will cause seriouslypollution if they are not collected and treatedappropriately.

Yes Medium

Airenvironment

Activities of loading machines, carriers, cargobarge, etc. are sources of noise and vibration.

Coal and equipment unloading could cause dustimpacts on air quality.

Yes Medium

2.8 Activities ofreceiving port

Water and soilenvironment

Waste oil from equipment and machines will bepollution sources for water and soil environment inport area if it is not controlled strictly.

Yes Medium

2.9 Oil spill, oilpipe systembreakdownaccident


Oil spill, oil pipe system breakdown accident arepotential risk, but not serious.

Yes Medium

2.10 Fire andaccident atwork

Operationworkers,people in theproject site

Fire and explosion accident could occur in DOtanks and coal storage areas. However, applicationof morden technical and technological measuresand seriously implementing regulations andoperation procedures as well as regularlymonitoring and maintaining as stipulated willminimize these impacts.

Yes Medium


Page 3-4

3.1.1.2 Impact sources no related to waste

Table 3-2 Impact sources no related to waste




Level ofimpact

1 Construction phase


Local traffic Most of transportation activities are on waterbornetraffic (on Hau River), so impact on local roadtraffic system is unconsiderable.

No Low

River flow Dredging could change current regime, and createrip-currents, etc.,…

No Insignificant1.2 River beddredging andportconstruction Resource of

aquaticproduct

Change of current regim and decrease of waterquality will impact on resource of aquatic product.

Dredging could destroy creatures’s inhabitation.

No Insignificant

Culture,socio-economy ofthe locality

Labour from other areas will disorder traditionallifestyle of indigenous inhabitants, increase the riskof happening contradictions between constructionworkers and local inhabitants. This will alsoincrease the risk of occurring unofficial relationsbetween local women and workers.

Building construction camps will lead to appearshops and inns, and other entertainment services.This is also risk of arising social evils.

No Insignificant1.3 Workersconcentration

Public health Increase pressure on health system of the locality. No Insignificant



Work and traffic accident may occur, howeverexperienced contractors will have mitigationmeasures to limit these risks.

No Medium

2 Operation phase

Surface water In operation phase, the power plant will use waterfrom Hau River for cooling. Flow of cooling wateris inconsiderable in comparison with average flowof Hau River.

No Insignificant

Aquaticproductresources

Shrimp, fish species, etc. will be entrained intocooling water flow at intake area causes losses ofamount of aquatic creatures. However, theselosses are insignificant.

No Low

2.1 Using waterfor cooling

River bedrelief of intakearea

Causes disorder of river flow and river bederosion. However, these impacts are insignificant.

No Insignificant


Aquaticcreaturesnearbydischargepoint

Difference between inlet and outlet of coolingwater system is about 7 - 8oC. Cooling watertemperature is higher than received seawater couldcause to reduce dissolved oxygen content whichimpacts on aquatic life in this area but scope ofinfluence is insignificant.

Yes Low


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Level ofimpact



Yes Insignificant


Could impact on aquatic life. However, wastewaterwill be collected and treated to meet VietnameseStandard before discharge. So, this impact isinsignificant.

Yes Insignificant2.3 Industrial anddomesticwastewater



Yes Insignificant

2.4 Residual heat Airenvironment

Residual heat from operation will impact onambient air temperature. But this impactconsidered is insignificant.

No Low

2.5 Fire andaccident atwork


While operation, maintenance, amendment ofmachine, labour accidents may occur if workers donot execute safety regulations seriously.

No Medium

3.1.2 Impacted objects

3.1.2.1 Impacted objects related to waste

3.1.2.1.1 Impacted objects related to waste in construction phase

3.1.2.1.1.1 Impact on air environment

In the construction phase, ambient air quality will be impacted bytransportation means, construction equipments, earthworking, andtransportation of construction material. Pollutants are mainly dust, exhaustfume with CO, SO2, and NOx.

• DustDuring construction phase, dust can be caused by: (i) earthworking activities;(ii) transportation and unloading of construction material and equipments; inwhich earthworking activities are main source caused dust.Transportation and unloading of construction material and equipments(cement, soil, sand and stone, etc, …), soil and sand from dredging of intake,discharge canal, etc,…will cause dust. Moreover, in construction materialgathering site, unloading will also cause dust impacts on construction workersand ambient air environment.However, construction material and equipment will be carried mainly bywaterborne, so amount of dust and its impacts on surroundings areinconsiderable, interruptive and only occur during transportation time.


Page 3-6

Table 3-3. Volume of excavation and fill for construction

No. Work item Unit Volume

1 Back filling sand m3 3,133

2 Bedding sand m3 98,524

3 Excavated soil m3 6,395,904

4 Back filling soil m3 1,246,664

5 Macadam type I m3 35,425

6 Macadam type II m3 44,281

7 Red boulder m3 17,712

8 Ashlar m3 51,269

Total m3 7,892,912

Source: FS report – PECC3 – June, 2008.

According to Rapid Assessment Guide of WHO, dust emission coefficients ofexcavation and levelling activities are as follows:

Table 3-4 Dust emission coefficients

No. SourceEstimatedemission

coefficient

1 Dust due to excavation and levelling activities and wind (sand dust) 1-100 g/m3

2 Dust due to loading and unloading activities of construction material(cement, soil, sand, stone...) and machines, equipments. 0.1-1 g/m3

3 Sand and soil scattering during material transportation which can causedust 0.1-1 g/m3

Source: Rapid assessment guide of WHO.

Based on emission coefficients in Table 3-4 and construction amount of theproject (table 3-3), dust in the construction phase (4 years) is estimated asfollows:- Dust volume from excavation and levelling in construction areas as:

(6,395,904 + 1,246,664)m3 x (1÷100) g/m3 / 4 years = 0.06 ÷ 6.06 g/sAverage concentration per hour of dust in total construction area (183.7ha)with 5m in emission height is:

(0.06 ÷ 6.06 g/s x 1 hr) / (183.7ha x 5m) = 0.02 ÷ 2.37 mg/m3

- Dust volume from materials transportation

(7,892,912)m3 x (0.2÷2) g/m3 / 4 years = 0.01 ÷ 0.13g/sAverage concentration per hour of dust in the transportation road with 5kmin length and 3m in emission height is:

(0.01 ÷ 0.13 g/s x 1 hr) / (5km x 12m x 3m) = 0.25 ÷ 2.5 mg/m3

So, maximum ambient concentration of dust per hour caused by loading andunloading and transportation activities of construction material is:


Page 3-7

Cdust = Cdust from sources + Cbackground

Cdust = (0.02 ÷ 2.37) + (0.25 ÷ 2.5) + 0.18* = 0.45 – 5.05 mg/m3

Note: * is concentration of dust in the plant area – was measured by Institute ofTropical Biology (ITB) – December, 2007 (Please sea Table 2-9).With above calculation, the maximum dust concentration in construction siteis over permitted value of the Vietnamese Standard 5937-2005 (0.3mg/m3), soit will impact on health of workers, animal and plants in the project area.However construction activities could not occur regularly at the same time andthese activities take place in a short-time, as well as the appropriate mitigationmeasures will be also applied to limit dust concentration.

• ReekRiver bed dredging will release H2S, CO2, etc…, which cause reek. However,port area is located lose to Hau riverside with open space and windy, so theimpact of reek is insignificant.

• Exhaust gasActivities of execution means cause many kinds of exhaust gases as:- Smoke from solder with dust, CO, SO2, NOx, etc.- Exhaust fume of transportation and execution means with dust, CO,

hydrocarbon, SO2, NOx, etc. These means are: excavators, tons self-unloading trucks, etc.

- The project could use stand-by generator which is source of air pollution,such as: SO2, NOx, CO, dust, VOC, etc.

Arccording to Rapid Assessment Guide of WHO, emission coefficient ofpollutants are as follows:

Table 3-5 Emission coefficient of air pollutantsNo. Source Estimated emission coefficient

Exhaust fume of transportation and executionmeans with dust, CO, hydrocarbon, SO2, NOx,etc.(lorry 3,5 – 16 tons, DO with S=0,5%)

Dust: 4.3 kg/ton DO

SO2: 0.1 kg/ton DO

NOx: 55 kg/ton DO

CO: 28 kg/ton DO

VOC: 12 kg/ton DO

Source: Rapid assessment guide of WHO.

Consumption of DO would be estimated about 0.05 tons/day, load ofpollutants are estimated as follows:- Dust: 4.3 kg/ton DO x 0.05 ton DO/day = 0.22 kg/day- SO2: 0.1 kg/ton DO x 0.05 ton DO/day = 0.005 kg/day- NOx: 55 kg/ton DO x 0.05 ton DO/day = 2.75 kg/day- CO: 28 kg/ton DO x 0.05 ton DO/day = 1.4 kg/day


Page 3-8

- VOC: 12 kg/ton DO x 0.05 ton DO/day = 0.6 kg/dayAs above results, impacts on ambient air quality from air pollutants such asNOx, SO2, CO caused by construction activities are low, locally and onlyoccur in construction phase.Like this, in the construction phase, dust is a pollutant impacted on ambient airquality. Because the project area where is close to Hau River and planted byfruit trees and rice field, exhaust gas from earthworking and constructionactivities are mainly workers. However, the project will apply appropriatemitigation measures to reduce these impacts, so the impacts will beinsignificant, local and temporary and will be no longer after finishingconstruction activities.

3.1.2.1.1.2 Impact of noise and vibration

Survey results of Institute of Tropical Biology in December, 2007 showed thatambient air quality of the project area is quite good.During construction phase, sources of noise include:- Construction of receiving port consisting of pile foundation consolidation

may cause high noise level and vibration (about 110dBA).- Machines, equipment for execution (bulldozers, concrete mixers, many

kind of drivers, excavators, air compressors, etc.);- Boat/carriers, mechanical transporters of construction material and

equipment.Table 3-6 Noise from construction machines

No. Machine type Noise level (dBA) at distance of 15m

1 Alarm horn 90

2 Bulldozer 93

3 Rammer 72 – 88

4 Concrete mixer 71 – 85

5 Excavator 72 – 96

6 Power generator 70 – 82

7 Driver 110

Source: Assessment of sources of air, water and land pollution, WHO, 1993

Refer to above table, it is estimated that noise level caused by constructionmachines and equipment could be 70 – 96 dBA within 15m in distance,espicially noise caused by drivers could be 110dBA within 15m.Level of impact on surrounding area can be evaluated by formula:

P1 – P2 = 20log(D2/D1)In which: Pi: level of noise at the distance i (dBA)

Di: Distance from noise source to received point (m)

• Maximum noise level caused by alarm horn of car/van and bulldozer,


Page 3-9

excavator, rammer, etc. at distance of 500m (neareast by residential area)could be calculated as below:

P500 = 96 – 20 log(500/15) = 65.5 dBA

• Maximum noise level caused by air-hammers at a distance of 500m fromconstruction site could be estimated as follow:

P500 = 110 – 20 log(500/15) = 79.5 dBAAlmost noise level is below permitted value in residential area (from 6am to 6pm) of the Vietnamese Standard 5949:1998 (75 dBA), except from air-hammeroperation (79.5dBA).During construction phase, vibration may be caused by drop hammer of drivers.Impacts of equipment of driver are identified as follow:- Drop hammer (8 tons in weight) which are designed input power of 48 KJ

with 5 – 7.5m in length and section of U shape when it was drived todesigned depth could cause a vibration of 12.9 mm/s at a distance of 10m.

- Drop hammer with input power is 30 KJ when drives into mud soil couldcause a vibration of 4.3mm/s at a distance of 10m.

- Diesel hammer drives into clay soil could cause a vibration of 7mm/s at adistance of 10m.

The project is bounded by the confluence of Hau River on two sides, by theagricultural area on surroundings with green space which are probability ofprevention and mitigation of noise and all residential area is furter 500m fromconstruction site, so impacts of noise and vibration caused by constructionmachines are insignificant, except activities of air-hammers. Noise level causedby air-hammer could be 79.5dBA in maximum, higher than TCVN 5949:1998on noise level for residential area. However, the equipment only uses in daytimeand for a short-time, for construction of pile foundation (about 2 – 3 months)and in combination with mitigation measures. So, the impacts will beinsignificant, observable and minimizable.

3.1.2.1.1.3 Impact on water environment

During construction phase, waste water source is mainly domestic wastewater(about 1,000 workers at peak period).Volume of domestic waste water from daily activities of workers is estimatedfor about 1,000 workers as follow:

1,000 persons x 85% x 120liters/person/day = 102 m3/day.Components of domestic waste water consist of suspended solid, grease andoil, high organic substances, scum, dissolved organic matter (indicated byBOD, COD parameters), nutrients (such as: nitrogen, phosphor) and micro-organism. Characteristics of domestic waste water are describled as belowtable:


Page 3-10

Table 3-7 Concentration of pollutants in domestic wastewater

ConcentrationParameter Unit

Raw Treated byseptic tank

QCVN14:2008/BTNMTColumn B, K=1

pH mg/l 5-9 5-7 5-9BOD5 mg/l 450-540 100-200 50SS mg/l 700-1450 80-160 100Nitrate (NO3

-) mg/l 50-100 20-40 50Total coliform MPN/100ml 106-109 5,000

Source: Waste water Treatment, Hoang Hue.

Notes:Column B: applied for domestic waste water discharged into water source which bestipulated as type B1 and B2 in QCVN 08:2008/BTNMT.K=1: applied for Head office of state agencies, corporations, schools, and otheroffices with an area of 10,000 m2.

Hence, if domestic wastewater is not treated, it will be over permited level ofNational technical regulation (QCVN 14:2008/BTNMT) and could attenuateriver water quality and transmit diseases throughout local inhabitant.Moreover, rain water flows over construction site which will carry mud,grease and other matter is also pollution source.There is a drainage system in the project area. A domestic waste watertreatment system will be also built early construction phase in order to limitimpacts of untreated domestic waste water on soil, underground, surfacewater, public health in the project area indirectly.

3.1.2.1.1.4 Impact of solid waste

Solid waste consists of construction waste and daily domestic waste ofworkers in construction phase.

• Construction solid waste consists of:- Mud from dredging is estimated about 500,000m3 including sand, sediment

contain organic matter, bottom-dwelling flora and fauna, etc. The wastewill be reused depending on local authorities’s requirement. Accordingproposal of Long Phu District People’s Committees, the dredging mudcould be used for filling in following areas:§ Tran De commercial zone in Trung Binh commune of Long Phu district

has an area of 40 ha with dumping level is 3m or higher;§ Brickyards in Long Duc commune of Long Phu district has an area of 7

ha with dumping level is over 4m;§ Resettlement area for Long Phu Power Complex project has an area of

65 ha with dumping level is about 3.2m.- Refuse consists: steel scrap, brick, stone, cement, etc. Volume of these


Page 3-11

wastes are estimated about 500kg/day. These waste will be reused forlevelling (for crushed brick, stone, rubble, etc) or for sell (steel, etc).

In general, almost construction waste would be collected for reuse or for sell,so its impact is inconsiderable.

• Domestic solid wasteDomestic solid waste caused by amount of construction workers is about 250-300kg/day (estimated by 0.25-0.3kg/person/day x 1,000 workers). Maincomponents of domestic solid waste are:- Organorgenic compounds as: vegetables, leftover food, etc;- Kind of packages, food and drink wraps, etc;- Inorganic compounds as: plastic, glass, etc;- Metal as: food cans, etc.Everyday, domestic solid wastes will be collected and disposed at a landfill(near ash disposal area). Every week, Urban Environment Company of SocTrang City will collect and transport them to an appropriate sanitationtreatment place, so the impact is considered insignificant.

3.1.2.1.1.5 Impact of hazardous waste

Hazadous waste in the construction phase is mainly eliminated oil frommachines, equipments and means for the construction, vehicles, oily cloutwhich may cause fire-detonation and water, soil pollutions.The project will contract with a hazardous waste treatment professionalcompany (has work permit) to transport and treat hazardous waste types atconstruction sites.The collection, storage and transportation will conform to hazardous wastemanagement regulations in the Circular No.12/2006/TT-BTNMT of Ministryof Resources and Environment on hazardous waste management. So, thisimpact is at low level and able to be controlled.

3.1.2.1.2 Impacted objects related to waste in operation phase

3.1.2.1.2.1 Impact on air environment

3.1.2.1.2.1.1 Exhaust gas from stacks

a. Estimation of flue gas from stacks during operation phaseLong Phu 1 TPP is expected to use coal imported from Indonesia or Ustraliaas resource of main fuel.Fuel combustion process will cause air pollutants such as SO2, NOx, CO anddust. Concentration of these pollutants depends on combustion technology andconditions, kind and composition of fuel. Thus, the report will consider mainpollutants in the exhaust gas such as dust, NO2, CO and SO2.


Page 3-12

Environmental standards applied for exhaust gasEnvironmental standards applied for exhaust gas of the power plant include:- Vietnamese standard TCVN 5939:2005 – Standard on industrial exhaust

gas (column B) applied for permitted concentration of CO (becauseVietnamese standard 7440:2005 does not stipulate this parameter).

- Vietnamese standard TCVN 7440:2005 – Air quality – Standard on exhaustgas of power plant. This standard is used together with the DecreeNo.07/2005/QD-BTNMT.

Table 3-8 Summarization of applied standards on exhaust gas (mg/Nm3)

No. Parameter TCVN 5939:2005 TCVN 7440:2005 (Cmax=Ctc*Kp*Kv)with Kv=1.2, Kp=0.7

1 Dust - 168

2 CO 1,000 -

3 SO2 - 420

4 NOx (all sources) - 546

Notes: Kv=1.2 (due to the project locates in rural plain region) and Kp=0.85 (the capacityis > 600MW).

Table 3-9 Standard on ambient air quality (TCVN 5937:2005)

Unit: mg/m3

No. Parameter Average 1 hour Average 24 hours

1 Dust 0.3 0.2

2 CO 30 -

3 SO2 0.35 0.125

4 NO2 0.2 -

Calculation of emission rate of Long Phu 1 TPPEmission rate of pollutants from stacks was calculated for the mostunfavourable scenario, that is the plant will be operated with full capacity andcoal is main fuel; so, emission rate of pollutants will reach maximum at thattime.Table 3-10 Parameters used for calculation of emission rate of pollutants

Parameter Proposed import coal

Annual consumption coal (tons/yr) 2,588,430

Average annual operation time (hrs/yr) 6,500

Flow of wet emission gas (Nm3/h) 2 x 1,889,557

Flow of dry emission gas (Nm3/h) 2 x 1,710,137

Air temperature in stack flue (0C) 90

Velocity of emission air (m/s) 20-25


Page 3-13

Parameter Proposed import coal

Stack diameter (m) 2 x 6.2*

% Sulfur in coal (%) 0.86

Coal ash percentage (%) 12

Volatile (%) 42

Notes *: 02 stack of the plant will be located side by side with an inner diameter of6.2m for each.

Table 3-11 Emission rate and concentration of pollutants in exhaust gas

Calculatedparameter

Emission rate(g/s)

Concentration(mg/Nm3)

TCVN 7440:2005(Cmax=Ctc*Kp*Kv) with

Kv=1.2; Kp=0.7)(mg/Nm3)

Dust 12,467.35 13,122.47 168

SO2 2,102.33 2,002.69 420

CO <1,049.75 <1,000 1,000**

NOx 472.39 450* 546

Notes:Concentration of dust and SO2 was calculated by Steam-Pro software which bases ontypical burning process of boiler.* Low NOx technology combined with air staging method will be used in order to ensurethat NOx concentration is less than 450 mg/Nm3which is technical constraint condition inbidding document and contract of equipment suppliers.** Extracted from TCVN 5939:2005, because TCVN 7440:2005 did not stipulate for CO.

Table 3-11 shows that concentration of dust and SO2 is over permitted level asstipulated in TCVN 7440:2005, so dust and sulfur removal systems shall beinstalled with their efficiency are below:

Table 3-12 Efficiency of dust and sulfur removal system

Calculatedparameter

Conc. beforetreatment(mg/Nm3)

TCVN7440: 2005(mg/Nm3)

RequiredEff.(%)

SelectedEff.(%)

Conc. aftertreatment(mg/Nm3)

Emissionrate aftertreatment

(g/s)Dust 13,122.47 168 98.72 99 131.22 124.67

SO2 2,002.69 420 79.03 85 300.40 315.35

Therefore, after installing dust and sulfur removal systems (with the efficiencyare 99% and 85% respectively), concentration of pollutants of exhausted gaswill meet permited level in TCVN 7440:2005 (for dust and SO2) and TCVN5939:2005 (for CO).For NOx, a NOx removal system will not be installed:- The plant is proposed to use bituminous coal imported from Australia or

Indonesia as main fuel. With coal characteristics was described above Table1-1 (as high percentage of volatile matter, low coal ash, etc.) and low NOx


Page 3-14

burner combined with air staging method, NOx concentration of exhaustedgas will be ensured less than 450 mg/Nm3 which meets allowance level ofTCVN 7440:2005 (546 mg/Nm3). This is a technical constraint condition inbidding document and contract of equipment suppliers.§ Low NOx burner:

The combustion air is supplied totally for the burner but only a part of airis mixed with coal during evaporation of volatile matter, the rest air issupplied at the end of the flame to complete the combustion process.Design of low NOx burner can reduce NOx content from 30% to 60% ascomparing to normal burner. However, the reduction of combustion airwill lead to the increase of unburned fuel. Therefore, a method toimprove fuel supply system to minimize unburned fuel to acceptablelevel is required.

§ Air staging method:In this method, to minimize presence of Oxygen at the beginning ofcombustion stage, a part of combustion air is extracted from the burnerand sent to the boiler above the burner. This method is considered as airstaging. In the pulverized coal fired boiler system, exceed air is expectedfrom 10% to 20% at BMCR. In some cases, about 10% air is extractedfrom the burner; it is enough to reduce NOx content to required level butstill helps the burner operate with exceed air from 5% to 10%. Reducingair at the burner under firing critical level can lower NOx emission;however this will also cause more unburned fuel. To completecombustion process of the unburned fuel, part of air extract from burnershall be supplied to the air staging ports above the burner; these airstaging ports are also called NOx ports or over fire air ports (OFA). Airgoing to these ports can reach 25% total amount of air supplied to theboiler. However, with a large amount of air going to the unburned fuelzone will produce NOx. Therefore, ratio of air staging shall have limit tominimize NOx emission.The use of OFA port may increase volume of unburned fuel, causing ashslugging in the furnace and risk of boiler piping corrosion. The risk offurnace piping corrosion will be higher as using coal with high content ofsulfur, high slugging capability. Therefore, the above mentioned coalshould not be used, or the OFA method should be limited due toeconomic reason in minimizing NOx emission.This method is often combined with low NOx burner method to increaseNOx reducing efficiency.

- Estimated results of concentration of air pollutants of air dispersionmodeling software are showed below table (Table 3-15), NOx concentrationin ambient air meets TCVN 5937:2005.

Due to reasons mentioned above, the project will not installed NOx removalsystem.


Page 3-15

b. Calculation of exhausted gas dispersion (from stacks)In operation phase, quality of ambient air will be monitored according toregulations to ensure quality of ambient air which is impacted by operation ofLong Phu 1 TPP meets permitted criteria.Breeze AERMOD GIS Pro software was used for estimation of air pollutantsdispersion. This software was compiled by Trinity Consultant based onAERMOD model which are recommended by U.S Environmental ProtectionAgency (EPA) for calculating or forecasting concentration and dispersion ofair pollutants. AERMOD model is more advanced than ISC3 (IndustrialSource Complex Model).

In which:CTot : Concentration in total (g/m3)CHoriz : Concentration in horizontal plume state (g/m3)

(Please see EPA-454/R-03-004 for more detail)CTerrRes : Concentration in terrain responding plume state (g/m3)

(Please see EPA-454/R-03-004 for more detail)f : The plume state weighting function

φp : The fraction of the plume massMeteorology input data for modeling software is a set of hourly data collectedduring one month which is represented rainy and dry season. The highest 24-hrand 1-hr average concentration values which are calculated by the modelingsoftware (background concentration included) will be compared with ambientair quality standard ones.Assumed calculation dataBased on above conditions, input data for air dispersion modeling softwarewas assumed as follows:


Page 3-16

+ Designed capacity of Long Phu 1 TPP is 1,200 MW (2x600MW) with fuelis imported bituminous coal;

+ Stack height: was designed so that it has to meet technical criteria(dispersion of air pollutants is the best) and economic efficiency. Theminimum calculated stack height was 200m. Long Phu 1 TPP has twostacks with inner diameter is 6.2m. So, velocity of exhausted gas is 20 –25m/s at 900C.

+ Components of exhausted gas:Table 3-13 Input parameters of air dispersion modeling software

Parameter Emission rate(g/s)

Concentration(mg/Nm3)

Dust 124.67 131.22

SO2 315.35 300.40

CO 1049.75 1000

NOx 472.39 450

+ Climate and terrain condition in the project area:

- Main and prevalent wind direction at project area is West – SouthernWest, Northern East and Northern West;

- Meteorology input data for modeling software is a set of hourly datacollected during only January and August from 1979 to 2005, becausetwo months are represented typical seasons in the project area: rainyseason (January) and dry season (August) especially wind direction,temperature and velocity are important factors influenced on dispersionof air pollutants (Please see Fig. 3-2, 3-3 – Windrose in the project area)

Figure 3-1 Windrose in the project area, January(from 1979 – 2005)


Page 3-17

Figure 3-2 Windrose in the project area, August(from 1979 – 2005)

- Map of the project area is devided into 137 x 136 grid cells (each cellhas size of 300x300m), so scope of calculation of pollutants dispersionis 40.7 km x 40.65km;

- System of cartesian coordinate axes is assumed as below:

Figure 3-3 System of cartesian coordinate axes for air dispersion model

x

y


Page 3-18

+ With above coordinate axes, location of the stacks of Long Phu 1 TPP onthe map is (18204.9 ; 19494.2).

Calculated results of air pollutants from dispersion modeling software forLong Phu 1 TPP:

Table 3-14 Calculated results of air pollutants dispersion model of LongPhu 1 TPP by stack height

Calculated highestaverage

concentration valueby (µg/Nm3)

Concentration ofpollutant in ambient

air (backgroundincluded) (*) (µg/Nm3)Calculated

parameter Month Averagein

Stackheight H= 200m

Stackheight H= 210m

Stackheight H= 200m

Satckheight H= 210m

TCVN5937: 2005(µg/Nm3)

1 hr 16.90 16.02 215.36 214.48 300January

24 hrs 4.23 4.06 109.34 109.17 2001 hr 16.79 15.96 215.25 214.42 300

DustAugust

24 hrs 3.71 3.56 108.82 108.67 2001 hr 50.34 47.71 127.52 124.89 350

January24 hrs 12.59 12.09 53.47 52.97 1251 hr 50.03 47.53 127.21 124.71 350

SO2

August24 hrs 11.06 10.61 51.94 51.49 1251 hr 68.36 64.80 134.51 130.95 200

January24 hrs 17.10 16.42 52.14 51.46 -1 hr 67.95 64.56 134.10 130.71 200

NOx

August24 hrs 15.02 14.41 50.06 49.45 -1 hr 151.92 144.00 1,640.38 1,632.46 30,000

January24 hrs 38.00 36.49 826.31 824.80 -1 hr 151.00 143.46 1,639.46 1,631.92 30,000

COAugust

24 hrs 33.37 32.03 821.68 820.34 -

Notes: * C = (Ccalculated + Cbackground) where background concentration is result measured byITB in the project area on December 2007.

Results of Table 3-14 shows that, two alternatives have stack height are 200mand 210m, pollutants concentration in ambient air meet TCVN 5937:2005.However, investment cost of 200m stack alternative is higher than other somuch whereas concentration of pollutants in ambient air is lower thaninconsiderably. Therefore, it is proposed to construct 200m stack alternative.


Page 3-19

Table 3-15 Calculated results of air dispersion model of Long Phu 1 TPP

Calculatedparameter Month Average

in

Calculatedhighest averageconcentration

value by(µg/Nm3)

Concentrationof pollutant in

ambient air(background

included)(µg/Nm3)

TCVN5937: 2005(µg/Nm3)

Location on themap

(m;m)

1 hr 16.90 215.36 300 (12300 ; 19500)January

24 hrs 4.23 109.34 200 (5400 ; 19500)1 hr 16.79 215.25 300 (21900 ; 23100)

DustAugust

24 hrs 3.71 108.82 200 (26400 ; 27600)1 hr 50.34 127.52 350 (12300 ; 19500)

January24 hrs 12.59 53.47 125 (5400 ; 19500)1 hr 50.03 127.21 350 (21900 ; 23100)

SO2

August24 hrs 11.06 51.94 125 (26400 ; 27600)1 hr 68.36 134.51 200 (12300 ; 19500)

January24 hrs 17.10 52.14 - (5400 ; 19500)1 hr 67.95 134.10 200 (21900 ; 23100)

NOx

August24 hrs 15.02 50.06 - (26400 ; 27600)1 hr 151.92 1,640.38 30,000 (12300 ; 19500)

January24 hrs 38.00 826.31 - (5400 ; 19500)1 hr 151.00 1,639.46 30,000 (21900 ; 23100)

COAugust

24 hrs 33.37 821.68 - (26400 ; 27600)

Notes: Pollutants concentration dispersed from stacks was calculated for the mostunfavourable scenario (the plant operates with full capacity and coal is fuel, coal type isused to calculate as coal with worst impact on the environment – Arutmin coal 0.86%S).The results of pollutants concentration in ambient air meet TCVN 5937:2005. So, in cases ofusing coal contained 0.53%S, concentration of pollutants in ambient air also meets TCVN5937:2005.

Contour maps on concentration of dust, SO2, NOx CO calculated from airdispersion modeling software for Long Phu 1 TPP (for the mostunfavourable scenario) are as follows:


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• Dust dispersion:

Figure 3-4 Contour map of 1-hraverage dust concentration of LongPhu 1 TPP on dry season (January)

Figure 3-5 Contour map of 1-hraverage dust concentration of LongPhu 1 TPP on rainy season (August)

Figure 3-6 Contour map of 24-hrsaverage dust concentration of LongPhu 1 TPP on dry season (January)

Figure 3-7 Contour map of 24-hrsaverage dust concentration of LongPhu 1 TPP on rainy season (August)


Page 3-21

• SO2 dispersion:

Figure 3-8 Contour map of 1-hraverage SO2 concentration of LongPhu 1 TPP on dry season (January)

Figure 3-9 Contour map of 1-hraverage SO2 concentration of Long

Phu 1 TPP on rainy season (August)

Figure 3-10 Contour map of 24-hrsaverage SO2 concentration of LongPhu 1 TPP on dry season (January)

Figure 3-11Contour map of 24-hrsaverage SO2 concentration of Long



Page 3-22

• NOx dispersion:

Figure 3-12 Contour map of 1-hraverage NOx concentration of LongPhu 1 TPP on dry season (January)

Figure 3-13 Contour map of 1-hraverage NOx concentration of LongPhu 1 TPP on rainy season (August)

Figure 3-14 Contour map of 24-hrsaverage NOx concentration of LongPhu 1 TPP on dry season (January)

Figure 3-15 Contour map of 24-hrsaverage NOx concentration of LongPhu 1 TPP on rainy season (August)


Page 3-23

• CO dispersion:

Figure 3-16 Contour map of 1-hraverage CO concentration of LongPhu 1 TPP on dry season (January)

Figure 3-17 Contour map of 1-hraverage CO concentration of Long


Figure 3-18 Contour map of 24-hrsaverage CO concentration of LongPhu 1 TPP on dry season (January)

Figure 3-19 Contour map of 24-hrsaverage CO concentration of Long


Remarks:In operation phase, precipitated dust from exhausted gas could impact on soilquality and vegetable cover in the project area; SO2, NOx emission couldcause acid rain which cause soil acidification phenomenon.Calculated results of dispersion model showed that:- On January, pollutants concentration in Hau Thanh, Phu Huu and Long Duc

commune where located in the direction of West, Southern West and Southof the plant is higher than others.


Page 3-24

- On August, pollutants concentration in An Thanh and Long Duc communewhere located in the direction of Northeastern North, North, East and Southof the plant is higher than others.

In general, pollutants concentration is lower than permitted value of ambientair quality standard TCVN 5937:2005. So, impacts of exhausted gas of theplant in operation phase on local people are inconsiderable.c. Impacts of exhausted gas in case of using DO for startingBesides using Bituminous coal as main fuel, the power plant also use DO forboiler starting-up and firing at load lower than 40%. After the unit beingstarted-up and synchronized to the power grid, the boiler will operate bypulverized coal without co-firing by DO.DO burning will also emit pollutants as: SO2, NOx, CO and dust into ambient air.Number of starting:- Average cold starting (with temperature less than 1500C) happens during 30

years: 3.3 times/year x 180 minutes/time;- Average warm starting happens during 30 years: 33 times/year x 120

minutes/time;- Average hot starting happens during 30 years: 133 times/year x 45 minutes.DO consumption rate:Capacity of plant in case of DO using at starting period and low additionalcharge operation equals by 40% designed capacity. Thus, rate of DOconsumption is estimated by:

0.187kg/kWh x 0.4 x 600MW = 33.66 tons/hrTable 3-16 Emission coefficient by DO burning

No. Pollutant Emission coefficient(kg/ton)

1 Dust 0.712 CO 2.193 SO2 20S4 NO2 9.62

Source: Assessment of sources of Air, Water, and Land Pollution.Notes:S: sulfur percentage of fuel, S = 0.25% for DO

Table 3-17 Pollutants concentration caused by DO burning for starting

Pollutant Concentration(mg/Nm3)

TCVN 7440:2005(mg/Nm3)

Dust 10.59 168CO 32.67 1,000SO2 74.60 420NO2 143.52 546


Page 3-25

Results of Table 3-17 showed that in case of DO burning for starting (withsulfur content is 0.25%), pollutants concentration in exhausted gas meetsTCVN 7440:2005.Long Phu 1 power plant will use DO as auxiliary fuel for for boiler starting-upand firing at load lower than 40%. After the unit being started-up andsynchronized to the power grid, the boiler will operate by pulverized coalwithout co-firing by DO.Air pollutants concentration in case of DO burning for starting is less thanpollutants concentration in case of coal burning.Moreover, the plant is proposed to install dust removal system (with removalefficiency reaches 99%) and sulfur removal system (with removal efficiency is85%); and according to the calculated results of air dispersion model in case ofcoal burning, pollutants concentration in ambient air is less than permittedlevel of TCVN 5937:2005. So, in case of DO burning for starting, pollutantsconcentration in ambient air meets TCVN 5937:2005.

3.1.2.1.2.1.2 Dust and emission gas from port areas

In equipment port, activities causing air pollution is very light, only a smallamount of dust and emission gas is generated from transportation andunloading of equipment and machines.All the machines and equipments in the port area use diesel oil for their fuelsource. Thus, all the kinds of the pollutants caused to the air due to theoperation of these kinds of means include: CO, NOx, SOx, hydrocarbon, dust,lead dust, and aldehyde. Concentration of these pollutants depends on thecapacity and operational system of all the types of means. The average totalusing demand is 2,000 - 3,000 liter/month. With the low demand on the use ofoil, impact of the discharging gas due to the ignition of this kind of fuel isinconsiderable. The total volume of pollutants is estimated 0.1ton of dust, 0.25kg SO2, 0.1 ton NOx, 0.05 ton CO per month (the oil density is 0.85 - 0.90kg/l).

3.1.2.1.2.1.3 Dust from coal transportation

Coal transportation will use specialized ship/barge with 10,000DWT. Thus,this impact seems to be none.In coal port area, activities of coal transportation will cause dust. However, thepower plant will use closed-type conveyor system for transportation, so it willminimize amount of dust.

3.1.2.1.2.1.4 Dust from coal storage area

Coal storage of Long Phu 1 power plant will be designed follow 2 options:- Option 1: coal storage is designed as dry coal storage building;- Option 2: coal storage is designed including (i) dry coal storage building,

and (ii) outdoor coal storage.


Page 3-26

a. For option 1:Coal storage area is designed including 2 dry coal storage buildings withcapacity of 214,000 tons, 88m in wide and 35m in high.With this option, amount of dust emissed into the environment isinconsiderable because the power plant will use closed-type conveyor systemand always maintain. However, risk of fire is high.b. For option 2:Designed coal storage includes:- 01 dry coal storage building with capacity of 214,000 tons (size is same

option 1), this capacity is adequate for 15-day full load operation.- 02 outdoor coal storages (50m in wide, 244m in length and 16m in high),

with capacity of 2x107,000 tons, it is adequate for 15-day full loadoperation.

At dry coal storage building, impacts to air environment is insignificant.At 2 outdoor coal storages, impact on air environment being the most care isdust from loading coal to storage and storing.Outdoor coal storage has a area of 244mx50m and capacity of 2x107,000 tonsfor 15-day full load operation.According to M.E.Reinder – Handbook of emission factors Part 2- Industrialsources, emission coefficient in storing and loading process as follow:- Coal storing process: 1-10g/(m2.day)- Coal loading process: 5-20g/tonAccording to average concentration defining method in area sources – “Airenvironmental” – Pham Ngoc Dang, dust concentration at timed t:

Lut

Lut

ins

t eCeCuH

LEC−−

+

−

+= )0()( 1. , g/m3

In there:C(t) – emission concentration at timed t(mg/m3)Es – dust emission – area unit (mg/m2/s)L – length of air case (coal storage along wind direct) (m)Cin – contaminant concentration in wind (g/m3)u – wind velocity (m/s)H – height disturbance (m) (in project area H = 20m)C(0) – foundation concentration of contaminant substance (mg/m3)

Outdoor coal store is considered in 110.45mx110.45m area.Computation parameter:

Es = 10 g/(m2.day) ~ 1.16x10-4 g/m2.s


Page 3-27

u = 1.77 m/sC(0) = 0,18 mg/m3 (according to survey result of Institute technology andmanagement environment resources (ITMER) on December 2007, plantarea).

One our average computing result:

45.110360077.1

345.110360077.14

)( 1018.01.2077.1

45.1101016.1 xx

int exeCxxxC

−−

−−

+

−

+=

Cstoring= 0.000362g/m3 = 0.362 mg/m3

The computing result shows maximum dust concentration of coal storingbeing lower than TCVN 5937:2005 standard (surrounding air quality –0.3mg/m3).

- With discharging coal, maximum dusts concentration in project area asfollow:Computation parameter:

Coal loading is requested: 850 tons/hour (2 storages).Supposed coal store is 244mx50m equivalent with 110.45mx110.45m =52,900m2 area.Discharging coefficient of dusts: 5 – 20g/tonEs ~ 0.0001935 g/m2.su = 1.77 m/sC(0) = 0,18 mg/m3 (according to survey result of Institute technology andmanagement environment resources (ITMER) on December 2007, plantarea).

One our average computing result:

45.110360077.1

345.110360077.14

)( 1018.01.2077.1

45.11010935.1 xx

int exeCx

xxC−

−−−

+

−

+=

Cloading= 0.000604 g/m3 = 0.604 mg/m3

The calculation result shows that maximum dust concentration of coalloading over permited value in TCVN 5937:2005 standard (surrounding airquality – 0.3mg/m3).

Coal storing and loading process will cause dust and impact on surroundingair quality. However, coal loading is not continuous, coal storage isn’t alwaysin full load status and mitigation measures will be applied (barrier, sensor,dust immunity …), so this impact is at low level and minimize.Remark: above calculation and assessments show that with option 1, airquality in coal storage area is not affected, but risk of fire is high; with option2, air quality in coal storage area is affected and mitigated by methods ofinstalling wind field fence and spraying water to reduce dust. Accordinganalysis and comparison of 2 options (Feasibility Study report, Oct. 2008), to


Page 3-28

mitigate investment cost and risk of fire, option 2 is chosen and option 1 isoptional if cost of bidder is interested.

3.1.2.1.2.1.5 Dust from ash removal

The power plant use coal use main fuel. With the pulverized coal fired boilertechnology, ash discharged from the boiler is mainly in two forms: bottomash, and fly ash.a. Bottom ash: occupies 15%, collected by dry ash removal technology, or

hydraulic bottom ash system technology, or of high concentration slurrydisposal technology. Characteristic of them is as follow:

Table 3-18 Characteristics of bottom ash removal technologies

Dry ash removal techonology Hydraulic bottom ash systemtechnology

High concentration slurrydisposal technology

Description:Bottom ash is removed from the boilerbed through furnace hopper, thenfalling into the stainless steel conveyorand partially cooling by air. Conveyoris placed in an enclosed housingconnected to the boiler by a flexible air-tight joint. Ash is conveyed to thecrusher to break large ash lump intostipulated dimensions. Ash is cooledonce more on the post-cooler beltconveyor and milled into small sizeprior to be transported to the silos by apneumatic ash handling system

Bottom ash from the bed offurnace drops into clinkerhopper full of water, fromclinker hopper, mixture ofwater/slag is transported to thecrusher and being crushed intosmall size. Then this slurry willbe pumped to the slurry pit

Main equipment forcondensed slag withdrawntechnique is web plungerpump. Web plunger pump canpump to transport condensedslag with solid content beingfrom 55 – 65%, sometimes80%. Wet slag withdrawnmethod (watery) withcentrifugal pump system canonly pump slag mud with solidcontent being about 15%.

Advantages:⋅ Considerable reduction of carbon

content in the bottom ash due to post-combustion on the conveyor;

⋅ Due to reintroduction of the heat inthe bottom ash into the furnace theenergy loss from sensible heat in thebottom ash is minimized;

⋅ Production of a high quality drybottom ash which is sellable to thecement industry;

⋅ Because of zero cooling waterconsumption and no waste ash so itcan reduce operation cost andenvironmental friendly.

⋅ Ash discharge system isinstalled easily due to it istransported by piping;

⋅ Easy in maintenance andmonitoring.

⋅ Ash discharge system isinstalled easily due to it istransported by piping;

⋅ Easy in maintenance andmonitoring.

⋅ Water quantity of thistechnique is lower thanHydraulic bottom ashsystem technology, sodischarging condensed slaglimits maximize leakingsewage to environment.

Disadvantages:

⋅ This technology requires space forinstalling ash removal equipment atthe bottom of boiler;

⋅ It also requires area to installconveyor from boiler bed to ashsilos;

⋅ Stricken maintenance is required toavoid unexpected stop of boiler.

⋅ It only suits with plan of wetash transportation;

⋅ Quality of by product (ash) isnot high;

⋅ It requires much water fortreatment and transportationof ash.

⋅ It only suits with plan of wetash transportation;

⋅ Quality of by product (ash)is not high;

⋅ It requires much water fortreatment and transportationof ash.


Page 3-29

Through the above analysis on bottom ash removal technologies, themechanical drag system for bottom ash technology is selected since followingadvantages and suitability:- Low heat loss;- Zero water consumption, or small consumption;- Quality of by-product ash is high.Description of dry ash removal system:Main parts of the bottom ash system consist of a stainless steel conveyors towhich the furnace ash falls. Conveyor is installed in an enclosed housingconnected to the boiler by a flexible air-tight joint. The conveyors transportash slowly to its discharge end. The conveyor mainly consists of a highflexible stainless steel mesh with stainless steel plates fixated to it on whichthe ash can be accumulated. The belt is supported by supporting rollers. Thewhole conveyor is designed to withstand high impacts of large ash lumpsfalling down from the furnace without any damages. During transportation onthe steel belt, the ash is cooled by a controlled small flow of ambient air thisflowing in the opposite direction to ash flow and entering the boiler throughthe furnace hopper. The amount of cooling air is limited to about 1% for coalswith normal ash content, a figure which experience has proven to have nonegative impact on the combustion process. The extractor is further equippedwith a drag link chain conveyor arranged below the steel belt to pick-up ashlying on the floor of the housing. The ash is transported to the discharge endof the extractor.At the discharge end of the extractor, a crusher is installed to break larger ashlumps into small pieces. The crusher is specially adapted to crush hot abrasiveash lumps.After being crushed into small pieces, ash is transported to the post-coolerconveyor, then it is transported to the hammer mill.From the hammer mill, ash is led to the two intermediate ash hoppers. Thebottom ash is then transported to the fly ash silos by a pneumatic ash handlingsystem.b. Fly ash: occupies 85%, fly ash accumulates at the hoppers of the

economizer, air heater and ESP, economizer, reheaters. Fly ash is collectedto ash silos with enough capacity for 48h full loads operation. If requiredto consume, ash will be supplied directly from silos.

With dry ash removal technology chosen, the fly ash collection system isdesigned to collect both fly ash and bottom ash into the silos.c. Components of ash


Page 3-30

Table 3-19 Components of ashNo. Component Unit Designed Worst coal Good coal1 SiO2 adb, % 62.23 45 49.42 Al2O3 adb, % 24 29 34.63 Fe2O3 adb, % 5.89 6 6.24 CaO adb, % 0.9 10 2.25 MgO adb, % 1.43 0.5 16 Na2O adb, % 2 0.4 0.37 K2O adb, % 1.03 0.4 0.28 SO3 adb, % 1.2 6.6 2.19 P2O5 adb, % 0.11 0.1 0.1

10 TiO2 adb, % 0.53 2 311 Others adb, % 0.68 0 0.9

Total % 100 100 100Deformation Red oC

Oxid oCNANA

1,4111,411

1,4001,400

Sphere Temp. Red oCOxid oC

NANA

1,4251,425

1,4301,430

Hemsphere Temp. Red oCOxid oC

NANA

1,4341,434

1,4501,450

Flow Temp. Red oCOxid oC

>1,350NA

1,4881,488

1,5701,570

Source: Feasibility Study report, Jun. 2009.Notes:

- Red oC: temperature in condition of reducing controlled atmosphere).

- Oxid oC: : temperature in condition of oxidizing controlled atmosphere).

d. Ash dischargeBy-product ash of bituminous coal is often has high quality and it can be usedas additive for cement. Based on that, the ash handling system is designed asfollows:In case ash is used as additive for cement, ash will be supplied directly underdry form from the silos through an ash pipe of about 300m and thentransported by trucks and 1,000 – 3,000 DWT barges. In case ash is notconsumed, ash will be transported to the ash disposal area and mixed withwater to form an ash slurry. Then it will be pumped to the ash disposal pond.Ash disposal pond:- Ash disposal pond of Long Phu 1 power plant belongs to the Long Phu

Power Complex infrastructure project. It is arranged at the West. Area isabout 35ha.

- To save investment cost, surrounding embankments of the ash ponds can beconstructed in three periods, each period corresponds to ash disposal in 10years. The embankments shall be leveled up according to 4m, 7m and 9.5msteps comparing to natural foundation. The last stage of the embankment is


Page 3-31

expected be raised up to the height of 9.5m comparing to the naturalfoundation elevation (+7.5m comparing to leveled foundation elevation) toincrease storage capacity of the ash pond for further 10 - 12% designedcapacity. So the ash pond will be able to store ash discharged in 30 years incase volume of ash is 30%. In case ash is not consumed, the ash pond willbe able to store total ash discharged in 10 years.

- According to the environmental requirement, ash and waste waterdischarged from ash slurry are not allowed to be discharged to thesurroundings. Therefore the bed of pond is desiged with 4 layers (details ismentioned in article 4.2.2.9).

Ash removal process can generate dust by activities such as:- Transporting ash to consumer (addition material for cement production) by

truck and barge will generate insignificantly dust because the plant usespecialized truck/barge and closed-type conveyors.

- In case of ash is not consumed, ash will be transported to ash disposal pond.Dust can be occured by activities of ash exploitation of local people. Thisimpact is very small, because ash disposal pond is located within area of thepower plant, and project will manage and forbid all exploitation activities oflocal people.

3.1.2.1.2.1.6 Dust from limestone storage area

Limestone dust may be generated from limestone storage area, affects to airquality in project area. However, limestone storing area is covered and thepower plant will apply mitigation mesures, so this impact is not at high level.

3.1.2.1.2.1.7 Emission gases from transportation vehicles in the power plant

This pollution level depends on road quality, traffic density, quality ofvehicles and amount of used fuel. For a gas-based car, when it runs 1 km onroad, it discharges into the air the gases as shown in the following table.

Table 3-20 Emission rate of pollutants due to transportationQuantity of pollutants (g/km)Pollutant

Engine < 1.400cc Engine 1.400 - 2.000cc Engine > 2.000cc

Dust 0.07 0.07 0.07

SO2 1.61xS 1.94xS 2.35xS

NO2 0.2 0.25 0.25

CO 1.71 1.49 1.49

VOC 0.24 0.19 0.19

Source: Rapid Environmental Assessment, WHO, 1995Note: S is content of sulfur in petrol (0.01%)

Traffic activities in this area are mainly transportation of limestone, workers,maintainance experts, and activities of some lifting-trucks.There are approximately 16 10-tons-trucks running 15 km on roads daily. The


Page 3-32

amount of pollutants due to limestone transportation is 10.5g of dust, 3g ofSO2, 30g of NO2, 256g of CO, 36g of VOC.There are approximately 15 30-seats-buses picking-up workers and running 10km on roads daily. The amount of pollutants due to picking-up workers is16.8g of dust, 4.66g of SO2, 60g of NO2, 357g of CO and 45g of VOC.Based on the above data, it could be concluded that impact of vehicles in theplant area to air quality is insignificant because of low traffic density andsmall loading of vehicles. However, the power plant will consider this impactto keep air quality in the area.

3.1.2.1.2.1.8 VOC leakage from fuel tanks

DO is used for boiler starting-up and firing at load lower than 40%.The leakage level of oil in oil tank area depends on tight-fitting of theconveying system and tanks, denpends on the intake structures of the tanks, aswell as temperature and humidity of surrounding air,…. The pollutants thatcan affect to the health of inhabitants in this case are derivative hydrocarbon atcertain concentration.According to the rapid assessment documents of WHO, the quantity of VOCcaused from leakage of fuel in the phase of loading, unloading and storage isabout 1.14 kgVOC/m3.year. So, with fuel storage is 2*1,000 m3, the emissionrate of VOC will be:2*1,000m3 oil x1.14kg VOC/m3.year /(8,760hrs/day) = 0,26 kg/h.This emission rate is at low level. And during operation phase, the power plantwill apply many specific mitigation measures, so this impact is assessed aslow impact.

3.1.2.1.2.2 Impact of noise and vibration

In the port area, noise and vibration generate from follow activities:

- The operations of the machines of the ships, barge, bucket elevatorunloader, … mooring and leaving the ports;

- The operations of the means of stevedoreing and transportation at the wharfof coal, limestone, oil such as the crane truck, forklift truck, trailer, theconveying belts....

- The operation of the DO oil pumping system;- The activities of loading and unloading of the machines and equipments

and the activity of gas and oil supplying station.In there, main sources of noise and vibration are activities of conveyors,stevedoreing equipments, and pumping fuel from barge to storage. Accordingsurvey results at some materials wharfs, noise level can be up to 70 – 80dBA.

In the plant area, noise can be generated from some equipments such asturbine, blower, air compressor, pumping engine, boiler…


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To forecast impact of noise of the power plant, the report refers data on noiselevel in Pha Lai thermal power plant (in operation process) as follows:

Table 3-21 Noise level in some areas in Pha Lai TPPSurvey position The noise (dBA)

1. Boiler- Fan- Grinding machine

84 - 8584 – 8593 – 95

2. Turbin generator- Stop pump- Force-pump (supply-pump)- Oil-pump- Turbin + generator

89 -9491 -9487 -9388 - 90

- Compressed air chamber 101 -1054. Pump fire-station 96 -975. Fuel management center 70 – 866. Central control chamber 70 -777. Administrative house

-Technology room- Production room

63 – 7553 – 65

8. Campus surround 55 - 73

Source: EPC, 2000

According to result table shows that the best noise level is at some areas such ascompressed air chamber, pumps and boiler. Forecasted that the noise level can beup to 90 – 105 dBA.Using the noise concentration calculation formula in article 3.1.2.1.1.2 forcalculation of noise level from activities of the power plant (P1 = 105dBA), at siteabout 500m far (D = 500m) (nearest residential area is over 500m far from theplant area), noise level is calculated as 57dBA.Above result shows that noise level meets allowed value in TCVN 5949:1998standard. This standard stipulates that noise level at production areas interposec inresidential areas from 6 o’clock to 18 o’clock is 75dBA. In fact, this noise levelwill be smaller again because now all international contractors undertake tosupply equipments with the noise level meeting Vietnamese Standard.In all pollution kinds at Long Phu 1 TPP, noise pollution is one of the minorpollution sources. However, impacts from over-allowing noise level can impacton people and labor productivity at the power plant.Residential areas far away from the project area about over 500m and plantingmany trees, it can reduce the noise. Although the noise level still meet allowedvalue of Vietnamese standard but some supported methods of the project willcontribute to reduce impact of the noise to population.

3.1.2.1.2.3 Impact on water environment

Waste water types of Long Phu 1 TPP in operation phase include:


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- Overflow rainwater.- Domestic waste water.- Production waste water (waste water from washing boiler, oil-contained

waste water, waste water from fresh water treatment system, cooling wastewater, etc.).

Table 3-22 Waste water types of the power plant

No. Types of waste water Volume NotesOverflow rainwaterRainwater falling onroofs, road surfaceand other locationswithout spilling ofwaste and oil

3.85m3/s Depending on rainfall, maximum volumeis about 3.85m3/s.It is considered as clean water and notnecessary to be treated. It is dischargeddirectly into the environment.

1

Oil-containedrainwater

0.02m3/s Depending on rainfall, maximum volumeis about 0.02m3/s.It contais oil, be collected, treated andthen dischared into the environment.

2 Waste water from ashremoval system

600 m3/day Waste water is high pH, highconcentration of SS, dissolve heavymetals, some of agent of HCO3

-, Cl-,It is colleced, treated by chemicals andpumped back to the slurry pit to reuse.

3 Domestic waste water 45.9 m3/day Estimated as 85% of domestic waterdemand (120ml/person/day) for 450workers and staffs.It contains organic, suspensoid solid,nutrient (N, P), microorganism, … treatedby septic tank, after led to main wastewater treatment system of the plant.

4 Waste water fromcoal storage area andcleaning coalconveyors

95 m3/day It contains coal dust and solid substances.It will be collected to a deposition tank.A part of collected coal will be utilized.Unutilized coal part will be discharge into ash disposal area.Waste water after the deposition will beled to the main waste water treatmentsystem of the plant.

5 Oil-contained wastewater

13 m3/day It contains oil and dregs, separated oil andled to the main waste water treatmentsystem of the plant.

6 Waste water fromfresh water treatmentsystem

17 m3/day It contains many muds and pH changedLed to the main waste water treatmentsystem of the plant.

7 Waste water from 216 m3/day Concentration of alkali , CaSO3, CaSO4


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No. Types of waste water Volume Notesexhaust gas treatmentsystem

and suspended substances is high.Led to the main waste water treatmentsystem of the plant.

8 Waste water fromchemical cleaningboiler

1.500m3/time

(1-2times/year)

Low pH (pH=2-3), high concentration ofsuspended substances, contained canxidregs, ....Led to the main waste water treatmentsystem of the plant.

9 Boiler blowdown 194.8m3/day It is nearly clean, so not necessary to betreated.

10 Waste water fromwashing Air Heater)

1,000m3/time

(1 time/year)

It contains suspended substances,undissolved solid dregs, …Led to the main waste water treatmentsystem of the plant.

11 Waste water fromwashing boiler

1,000m3/time(1 time/year)

It contains suspended substances.Led to the main waste water treatmentsystem of the plant.

12 General service wastewater

600 m3/day Led to the main waste water treatmentsystem of the plant.

13 Cooling waste water 56m3/s Discharged into the environment.

Note: types of waste water such 8, 9, 10, 11 are occurred in the same time.

3.1.2.1.2.3.1 Overflow rain water

Overflow rain water in operation phase is divided to 2 types:a. Rain water falling on roof, pavement and others un-dissolved, swiping outcontaminant and oil is considered purity regulared water. Rain-water will becollected and discharged on private system, not need to treat. Consequently, atplant area, storage, office, investor will build manhole, sewerage system andhooded beton ditch to facilitate for drainage;b. Rain-water falling and crossing by some special area as fuel storage tub,coal storage, lorry parks, port, storing area domestic waste can be polluted byoil, organic admixture and solid, so need to collect and tend to sewagepurification construction.Due to project area is within area with many canals, drainage is easy. Rainwater swiping out special area, polluted rain water shall be treated beforedischarging to environmental, so impacts of overflow rain water are assessednothing.

3.1.2.1.2.3.2 Waste water from ash removal system

As mentioned in article 3.1.2.1.2.1.5, in case of ash is not consumed oroccurence of problems, ash will be transported to ash disposal pond.


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Ash is transported to ash disposal pond in the form of as ash slurry by a anti-corrosion carbon steel piping with 350 mm of diameter. After into the pond,ash slurry is deposited, causing waste water. This waste water high pH, highconcentration of SS, dissolve heavy metals, some of agent of HCO3

-, Cl-, …Volume is about 600m3/ngày, it will impact on water quality and aquaticorganism if not treated.This water after settling down will be treated by chemicals and pumped backto the slurry pit to reuse.

3.1.2.1.2.3.3 Domestic waste water

Domestic waste water is estimated as 85% of domestic water demand.According to TCXD 33-2006 of Construction Ministry, the domestic waterdemand is 120litres/person/day.With 450 staffs of the plant, total domestic waste water is:

450 persons x 120litres/person/day x 85% = 45.9m3/dayIt contains organic, suspensoid solid, nutrient (N, P), microorganism, …(component of domestic waste water is showed in table 3-7). Quality ofdomestic waste water does not meet QCVN 14:2008/BTNMT. If it isn’ttreated, it would reduce water quality and facilitated developing and spreadingepidemic diseases.Consequently, domestic waste water will be collected and treated to meetQCVN 14:2008/BTNMT before discharged into Hau river. Hence, impact onaquatic organism and water source of Hau river is assessed as at low level.

3.1.2.1.2.3.4 Waste water from coal storage area and cleaning coal conveyors

In coal port, coal is carried by conveyor belt into coal storage. Washing coalconveyors will generate waste water containing coal dust and suspendedsubstances. In coal storage, water is used to spray anti-dust, so it alsogenerates waste water .

Waste water from coal storage area and washing conveyors contains coal dustand suspended substances. It will be collected and treated. Volume of thiswaste water is about 95m3/day.It will be collected to a deposition tank near coal storage. A part of collectedcoal will be utilized. Unutilized coal part will be discharge in to ash disposalarea. Waste water after the deposition will be led to the main waste watertreatment system of the power plant.

3.1.2.1.2.3.5 Oil-contained waste water

Oil-contained waste water is generated mainly from oil tank area, oil pumpstation, substation area, … It contains oil and dregs.Due to portability of oil in water, oil-contained waste water spreads outquickly and creates a thin film covering the surface of water source, it will


Page 3-37

restrict the dissolution and penetration of oxygen into the water source thusinfluencing the capacity self-purification of the water sources as well asimpact on aquatic organism.This waste water is not discharged frequently, it is about 13m3/day in volume,will be collected and treated.

3.1.2.1.2.3.6 Waste water from fresh water treatment system

This waste water is from fresh water treatment system due to washing resinand recycled resin. It contains many muds and pH changed. If not treated, itwill impact on the environment. Volume of it is about 17 m3/day. It will be ledto the main waste water treatment system of the plant.

3.1.2.1.2.3.7 Waste water from exhaust gas treatment system

Exhaust gas treatment system will generate waste water with highconcentration of alkali, CaSO3, CaSO4 and suspended substances. Volume isabout 216 m3/day.

3.1.2.1.2.3.8 Waste water from boiler area

Waste water from chemical cleaning boiler: the boiler is cleaned by chemicalsin maintenance and repairment. This waste water has low pH (pH=2-3), highconcentration of suspended substances (100-1.000mg/l), and many Calciumdregs. This waste water will be collected and treated with frequency of once ortwice per year. Maximum volume is 1,500m3/time.

Waste water from boiler blowdown (194.8m3/day) is nearly clean, so notnecessary to be treated.

Waste water from cleaning APH: 1,000m3/time, washing in 3 hours/time, 1time/year, containing suspended substances and undissolved solid dregs.Waste water from washing boiler: 1,000m3/time, 1 time/year. It containssuspended substances.

3.1.2.1.2.3.9 General service waste: 600 m3/day.

3.1.2.1.2.3.10 Cooling waste water

• Impact of taking cooling waterLong Phu 1 TPP use water from Hau river for cooling. Volume of water forcooling is 56m3/s.Inlet door is designed to ensure take in water with velocity < 0.2 m/s.Therefore, it is not influence on moving and breeding of aquatic animal at thisarea.It is very hard to define losing about economy due to losing apart of aquaticproduct when take in water for Long Phu 1 TPP. If assessing damage base on


Page 3-38

take in volume/ Hau river volume rate, maximum damage rate is about 2%(dry season). Breeding and small young fish season is mainly in early rainyseason (May - July). At this time, Hau river volume was high. Therefore, inearly season, source of income of aquatic product will be lost apart due to takein water for Long Phu 1 TPP. However, losing rate is small, about 2% (0.2%in flood season).According to statistical directory in 2006, maximum fish output exploitedfrom Hau river is about 7,000 tons/year. Maximum damage rate is 2%,correlative 140 tons/year, it means losing 0.65 billion VND/year (35,095USD/year). This is maximum damage; damage rate is lower in reality.Therefore, this impact is assessed insignificant.Take in water process can make erosion and disorder flow at cooling waterintake area. However, this impact is insignificant because take in watervelocity is <0.2m/s and intake door is calculated, reinforced to restrictmaximum erosion at intake area.

• Impacts of cooling water qualityTo protect cooling water system, Chlorine will be add into cooling water toachieve 0,2 – 0,3ppm. Chlorine adding process is controlled by sensor to controlsuperfluous chlorine concentration in water no excess TCVN standard. Thismethod ensures that superfluous chlorine concentration in cooling water meetTCVN 5945:2005 standard. Other components in cooling water are not changecompare with inlet. Therefore, cooling water can discharge directly intoenvironment without treatment.

• Impact of discharging cooling waterCooling waste water discharge system imcludes siphon pit, steel pipelinessystem and open canal with 1.8km in length.In the first phase, the Long Phu Power Complex with operation of Long Phu 1TPP, volume of cooling waste water is 56m3/s. Differential temperature ofcooling water compared with intake water is 7oC. When cooling watertemperature is higher than natural water, dissolve oxygen concentration willdecrease, therefore it will influence on respiration of aquatic organism species.Highest average temperature in many years of Hau river is 27oC – 30.1oC(data 1978 – 2004). With differential temperature of cooling water comparedwith intake water is 7oC, average temperature of cooling waste water is 34oCto 37.1oC. According to industrial waste water standard TCVN 5945:2005,permitted temperature is 40oC (type A), therefore water temperature at outletmeets this standard.However, take in and discharge of cooling water into Hau river are needed tocalculate by imitate modeling to ensure that cooling water spread in aroundenvironment, as well as increasing temperature of water gradually due todischarging cooling water continuously into a section of Hau river will notimpact on cooling effect.Cooling water spreading calculation


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Flowing process can be described by the hydraulic boundary-valued problem,including several partial differential equations, initial and boundary conditionsof the flow domain. Depending on the domain topography these factors of theproblem will be selected. The numerical method for solving the problem wasdetermined with a shallow water region affected by the Coriolis and gravityacelleration. The system of equations that describes this flow process with asimple turbulent model can be written as follows:

qx

HVtH 2

1kk

k =∂

∂+

∂∂ ∑ =

(1)

( ) ( ) 2,1ifVfHgHVHt iibo

ii ==+ζ∇+∇+

∂∂ J

In there, momentum throughput, signed ( )2i1ii J,J=J , is defined by:

2,1k,i,xVDVVJ

k

ikikikiki =

∂∂

−ε=

V1V2 or U V : vertically-averaged velocity vector,H : water depth,go : gravity acceleration,

εij : momentum-adjusted coefficient,f b : bottom friction coefficient,ζ : water elevation.Dki : turbulent coefficients,

ω : the earth angular velocity,

λ : latitude angle,W : wind speed,

ψ : wind angel from the x-direction,Cw : : wind friction coefficient.Coefficients fi are defined by:

ψ+Ω= cosCHVf 2w21 W , ψ+Ω−= sinCHVf 2

w12 W

In which: λω=Ω sin2 ,The heat spreading of cooling water is defined by heat transfer problem in twodimensions. Just as a mass balance can be written for a volume of water, aheat balance can also be developed. The heat balance for a completely mixedsystem can be expressed as:Accumulation = inflow-outflow ± surface heat exchangeFrom there, equation of heat spreading in three dimensions is following:


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TQzTK

zT

yTK

yT

xTK

xT

yTW

yTV

xTU

tTC

zyx

p

β−+

∂∂

∂∂

+

∂∂

∂∂

+

∂∂

∂∂

=

∂∂

+∂∂

+∂∂

+∂∂

In which:

Cp: specific heat capacity(Kcal /oC⋅m3);x,y,z : coordinates (m);U0,V0,W0 : velocity components with respect to x,y,z (m/s);

Kx, Ky, Kz: heat diffusion coefficients (Kcal/oC⋅m⋅s);

Q: heat source/sink (Kcal/m3⋅s);

β : heat loss coefficient (Kcal/o C⋅m3⋅s).Heat transfer calculation due to cooling water of Long Phu 1 on Hau river isdone by Application Mechanics Institute. Calculation process use SW-FAST2D program (Surface Water Flow and Solute Transport in 3Dimensions). In which, it used limited volume methods to define key ofnumerical value for heat transfer process.Data for calculation:- Differential temperature of cooling water and inlet water is 70C, cooling

water volume is 56m3/s.- Wind speed: 1.77m/s- Relative humidity: 80%- Other data: hydrography data of Hau river, flow regulation, bottom terrain

of Hau river at outlet area, elevation and structure of outlet.Calculation option- Discharging 6m in depth, 80m far, and tide is the highest.- Discharging 6m in depth, 80m far, and tide is the lowest.


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Figure 3-20 Calculation gird

Calculation of heat spread of cooling water in the most inconvenient conditionbeing exhaust season.Calculation resultTable 3-23 Heat transfer distribution when river tide rises to tide top

Point 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1610 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0011 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0012 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0013 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0014 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0015 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0016 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0017 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0018 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0019 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0020 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00


Page 3-42

21 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0022 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0023 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0024 0.00 0.08 0.10 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0025 0.00 0.18 0.19 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0026 0.00 0.23 0.30 0.21 0.09 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0027 0.00 0.38 0.43 0.31 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0028 0.06 0.50 0.56 0.47 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0029 0.17 0.67 0.80 0.58 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0030 0.22 0.87 1.07 0.91 0.43 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0031 0.27 1.02 1.20 1.02 0.48 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0032 0.40 1.22 1.30 1.21 0.52 0.22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0033 0.47 1.26 1.37 1.23 0.62 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0034 0.53 1.33 1.43 1.34 0.72 0.32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0035 0.58 1.46 1.55 1.46 0.91 0.40 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0036 0.62 1.64 1.76 1.57 1.10 0.51 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0037 0.86 1.80 1.92 1.77 1.29 0.63 0.21 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

38 1.31 2.09 2.17 1.85 1.53 0.68 0.25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0039 1.57 2.39 2.44 2.00 1.61 0.77 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0040 2.26 3.38 2.92 2.06 1.70 0.85 0.42 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0041 2.21 3.33 2.90 2.04 1.67 0.88 0.36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0042 1.88 2.40 2.41 2.00 1.50 0.78 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0043 1.44 1.98 2.02 1.55 0.91 0.43 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

44 0.68 1.45 1.42 0.95 0.55 0.24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0045 0.24 0.71 0.68 0.49 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0046 0.00 0.25 0.22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0047 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0048 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0049 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0050 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Temperature different of 15 grid lines adjacent riverside of the power plant.Distance of grid cells is 50m.


Page 3-43

Figure 3-21 Contour line on temperature when river tide rises to tide top


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Figure 3-22 Temperature section when river tide rises to tide top


Page 3-45

Table 3-24 Heat transfer distribution when river tide rises from tidebottom to zero

Point 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1620 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0021 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0022 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0023 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0024 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0025 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0026 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0027 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0028 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0029 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0030 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0031 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0032 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0033 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0034 0.00 0.11 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0035 0.12 0.25 0.22 0.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0036 0.25 0.73 0.69 0.50 0.19 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0037 0.70 1.47 1.42 0.96 0.56 0.25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

38 1.44 1.98 2.04 1.57 0.93 0.46 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0039 1.91 2.41 2.42 2.02 1.53 0.79 0.26 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0040 2.22 3.34 2.92 2.05 1.69 0.88 0.38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0041 2.27 3.39 2.94 2.07 1.71 0.87 0.43 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0042 1.59 2.41 2.45 2.01 1.63 0.79 0.35 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0043 1.33 2.10 2.18 1.85 1.55 0.70 0.27 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

44 0.87 1.81 1.94 1.78 1.30 0.65 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0045 0.63 1.66 1.77 1.58 1.11 0.53 0.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0046 0.59 1.47 1.56 1.48 0.92 0.42 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0047 0.54 1.34 1.44 1.36 0.73 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0048 0.47 1.27 1.37 1.24 0.63 0.26 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0049 0.41 1.23 1.32 1.22 0.53 0.22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0050 0.28 1.03 1.20 1.04 0.48 0.17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0051 0.24 0.88 1.09 0.93 0.44 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0052 0.18 0.69 0.81 0.60 0.33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0053 0.05 0.50 0.57 0.48 0.23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0054 0.00 0.39 0.43 0.32 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0055 0.00 0.23 0.31 0.23 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0056 0.00 0.19 0.20 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0057 0.00 0.10 0.12 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0058 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0059 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0060 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Temperature different of 15 grid lines adjacent riverside of the power plant.Distance of grid points is 50m.


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Figure 3-23 Contour line on temperature when river tide rises from tidebottom to zero


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Figure 3-24 Temperature section when river tide rises from tide bottomto zero

Remark result of modeling:- At neighbor of outlet of Long Phu Power Complex, flow at outlet area in

exhaust season have average water level between -2.2m to 1.6m (Hon Daulandmark). Level different is about 3.8m. Maximum flow velocity is about0.5m/s and minimum is 0.35m/s respectively. Salinity has penetrated intocalculation area, but according to surveyor result of Quan Lo – Phung Hiepproject salinity varying under 3ppt didn’t affect to temperature spreadprocess of river water.

- Bottom terrain at outlet area is advantage to discharge cooling water. Ifelevation of bottom at outlet area is designed at -6m compare with zero (Hon


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Dau landmark), exchange heat and diffusion will have a high effect.- According to calculation result in 2 cases, temperature different of water in

outlet is 4oC as maximum. With highest average temperature in many yearsof Hau river is 27oC – 30.1oC (data 1978 – 2004), average temperature ofcooling waste water will be 31oC to 34.1oC, it meets TCVN 5945:2005standard (permitted temperature is 40oC for A type).

- In site 200m far from intake, maximum temperature different of water is0.4oC (when river tide rises to tide top), so discharge of cooling waste waterwill not impact significantly to temperature of water in the intake as well ascooling effect of the power plant.

- Result of calculation show that cooling water volume is not great (about0.2% of every year average volume and 2% of minimum volume of Hauriver), spreaded fairy good even in exhaust season. Therefore fish and otheraquatic organism will not be impacted suddenly by temperature of coolingwater. It will adjust to new environment step by step in the course of time.Thus, this impact is assessed insignificant.

Impacts of increasing temperature of river water due to cooling waterThe Hau river is influenced by haft daily tide. When temperature of river waterincrease, oxygen concentration dissolved in water will be decreased, therefore itmake decreasing density of water, impacts on zooplankton, bottom dwellinganimals, fish, spawn and larva. Impacts as erosion, disorder flow can happen.This matter impact on physical essence of aquatic ecosystem, thus it makesnegative impacts on life of aquatic organism at project area. Impacts on aquaticecosystem due to heat pollution are summarized following:- In condition temperature of river water is rise higher than average

temperature of Hau river, aquatic organism species less impervious to heatwill be annihilate. While, species better impervious to heat will increasequantity, therefore it makes change in structure of organism community. Athigh temperature, respiration and development speed of aquatic organism iseasy to be impacted due to pollutants in water. Thus, decrease in dissolveoxygen concentration in water polluted organic substance will easy to impacton sensitive organism species.

- With poikilotherm aquatic species, its body temperature is often differentialtemperature about 0.5 – 1oC compare with around water temperature, thus,water temperature impact directly on metabolism process of fish. However,in nature, fish is easy to adjust to seasonal changes and it have natural instinctwith change in temperature suddenly. It will avoid itself if it feel this changein temperature. While, water temperature around outlet point will decreaselittle by little along distance due to heat spreading, therefore there is notchange suddenly in temperature in this area, impact on fish and aquaticspecies is assessed insignificant.

- Increasing of temperature also affects to micro-organism, at 16 – 19oCdiversity of micro-organisms is highest. Diversity reduced by the increaseof temperature but increase amount of individuals.


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- Letting out cooling water also has the ability to erode and cause disorder atarea.

However, the difference in temperature not over 30C within 100m from sewerposition is impacts of cooling water systems for the marine and aquaculture onthe Hau River is negligible.

3.1.2.1.2.4 Impact of solid waste

Activities of the power plant can generate production waste and domestic wastesuch as:- Domestic solid waste: generated by activities of operation workers (about

450 persons). Each worker per day will create about 0.25 – 0.3kg of domesticwaste. So, total amout of domestic waste of Long Phu 1 is about 112.5kg –135kg/day. The domestic waste contains high organic substances content,plastic bag, canned food cover...

- Residue amount is discharged by burning coal: 69.88 tons/hour;- Gypsum amount generates after exhaust gas treatment: about 21,735.08

kg/hour.- Solid waste from washing boiler: 0.5 ton/time (periodically 1 year/time). This

waste contents metal, salt, low pH, ...- Solid waste from waste water treatment system: 0.2ton/day. This solid waste

take form by dead body of microorganism, solid waste matter ...Waste wastertreatment system separate hanging solid waste matter and solid wastes beforeit is treated biology or chemical (neutralizing).

All of above solid wastes will be collected and transferred to suitabletreatment place by contracts with related companies. Besides, the project willapply mitigation measures to minimize amount of solid waste, and wasteclassification at sources for reprocessing, reusing and treatment. Hence, thisimpact is at medium level; it can be controled and mitigated.

3.1.2.1.2.5 Impact of hazardous waste

Hazardous waste of the plant is oil sludge and oil-tubs or being infected by oilthings which cause of fire – detonation and water, soil pollutions.Oil sludge takes form from oil-tub cleaning processing period 1 time/3 years. Theestimated oil dreg amount takes form in 1 time cleaning of document “Researchabout treatment technology of some symbolic industry solid waste matters report9/2000”. Oil amount in tub-bottom of one cleaning times of 2 DO oil-tubs 1,000m3 is about 5-7tons. In there, mud oil sludge separate about 6.5%, contain mainlybeing metal oxide. Hence, oil sludge amount eliminate in 1 cleaning times being:7 x 6.5% = 0.455 ton.Following decision No 23/2006/Q -BTNMT about the promulgationhazardous waste list, oil sludge is firing and exploding or chemical convertingenable hazardous waste. Hence, impacts would be very high if usefultreatment methods weren’t applied. However, oil storing area will be planned


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detail, separated with other area and had very strict regulation and flameproof,so denotation combustion isn’t enable.Besides, there are hazardous wastes with small amount as:- Oil from transformer take form in maintaining processing (this oil does not

contain PCB - Polychlorinated Biphenyls).- Lubricating oil take form by maintaining machinery and equipment.- Clouts have waste lubricating oil.Hazardous wastes will be collected, classify, storing and transport followingassign of hazardous waste management regulation. So, its impact on environmentand health, specially be subject to fire-detonation is minor, is controllable.

3.1.2.2 Impacted objects no related to waste

3.1.2.2.1 Impacted objects no related to waste in construction phase

3.1.2.2.1.1 Impacts of river bed dredging

Bed dredging for port route could change river current, cause turbulent flow,etc. However, due to amount of dredging mud is about 500,000m3 in total,there is no considerable impact on river flow.Bed dredging could also increase turbidity significantly and impact on aquaticlife in the port construction area. High turbidity causes decrease of DOconcentration which impacts instantly on aquatic creatures and indirectlyresource of aquatic products. Moreover, high turbidity concentration will alsoimpact on photosynthesis of alga, waterweed, moss and fish living.Dredging could destroy inhabitation and sweep bottom-dwelling creaturesaway in deposit layer, so they have to migrate to new inhabitation.In general, environmental impacts of dredging for port route are consideredinsignificant and will be recovered by morden means of construction, quickconstruction time and environmental quality will be controlled strictly.

3.1.2.2.1.2 Impacts on ecosystem

In construction phase, exhaust gas and dust caused by construction activitieswill impact on photosynthesis process of vegetables in surrouding area.However, the impact is considered low and minimizable.Runoff goes over earthworking area will carry waste, grease which arepollution source of surface water and could impact on ecosystem of the projectarea.

3.1.2.2.1.3 Impacts on landscape in the project area

The landscape will be impacted by construction activities. These activities willmake disorder landscape but the project area do not lie adjacent to protected ortourist area, so the impact is considered low.


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Figure 3-25 Existing and proposed protected areas in the project area

Long Phu 1 Thermal Power Plant


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3.1.2.2.1.4 Impacts on socio-economic situation

Construction activities could impact on local socio-economic status due toconcentration of a large numer of workers (about 1,000 workers at peak hour).Concentration of construction workers could cause social issues.Construction activities will also mobilize a large number of local labours,contribute to employment creation for partial local leisured labour which boostdevelopment of business activities and services in this area.However, apart from positive impacts mentioned above, concentration ofconstruction workers could cause social issues as: uncontrolled emigrationfrom other places, increasing problems of public order and social evils. Inaddition, conflicts between construction workers and local inhabitants couldbe occurred. This is a unavoidable kind of contradiction but could beminimized.Concentration of a large number of construction workers could also pollutewater resource, epidemic of disease, and pressurize into local system health ifmanagement and treatment of solid waste and wastewater was notimplemented sufficiently.Construction activities would also require a large number of material transportvehicles which cause dust, traffic accidents and increasing pressure into localtraffic system.

3.1.2.2.1.5 Impacts on cultural, historical monuments

According field surveys, public consultation and gathered information of localauthorities, the project only impacts a communal house in Thanh Duc hamlet,Long Duc commune.

Figure 3-26 Affected communal house in Thanh Duc hamletClearance for Nam Song Hau road project has affected large parts of thiscommunal house. Survey results showed that it only remains the gate and a


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house category 4th (brick, tile roof) commemoration of heroic martyrs andFarming Queen. This communal house not have historial value, mainly is aplace for commemoration of heroic martyrs and aspiration of harvest.Clearance of Long Phu Power Complex (including Long Phu 1 power plant)will move this communal house. The PMB will combine with local governmentand manager of this communal house to remove and rebuild the communalhouse in other place outside of the project.

3.1.2.2.2 Impacted objects no related to waste in operation phase

3.1.2.2.2.1 Impact on estuary ecosystem

Have rich nutrition at estuarial area, with high diversity, important areas foraquaculture. Includes many ecosystems: mangroves ecosystems, aquacultureecosystems... It focuses a lot of beach with some species breeding of aquaticproducts. So any economic activity in the social area and middle of the riverflows to the sea are likely to impact the environment ecosystem estuaries.Impact's main of Long Phu No.1 TPP to marine living in general (livingaquatic, fish, and shrimp) is water waste in the process of cooling.As described above, the temperature of waste water at flushing gate from 340Cto 37.10C, increasing temperature in water environment will affect to aquaticspecies living, particularly in zooplankton and fish. Although there are somespecies in the group Rotatoria, Cladocera and Copepoda enable distribution,but the threshold temperature higher than 350C many species will die series,the species anti-reproductive ability and development is limited. Individualspecies in the group Rotatoria time grow and develop optimal from 3.4 to 4.4days at 250C, they are sensitive to changes in environmental conditions, whenwater temperature is high, they will release rest-spore, and the mature bodieswill be mass killed.Although the impacts to aquatic living around the plant, but the Hydro on theHau river is able to reduce the temperature of water within 1 km, so the impactof cooling water to the estuaries area is negligible. But need attention to Cloamount, acid amount, the residual oil in the manufacturing process, will be afactor affect aquaculture ecosystems at estuaries area.

3.1.2.2.2.2 Waste heat (heat pollution)

Main waste heat creating source is from gas oven areas. But nowadays all gasovens are covered by insulating skin to sure skin-temperature lower than 50oC.Oven-smoke temperature is about 90oC dispersing at height 200m; then, it isdispersed well.Subject is affected by factory heat pollutions is operating worker. While theyhave to do in high temperature conditions, body temperature of directed workerwill be increased noticeable; because waste heat cause to worker bodymetabolism processing create high biology heat. When direction worker bodybiology can not neutralize waste heat, they will cause tired state, increasing


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trauma danger and can occurs clinical signs of high heat-diseased. When man hasto do in high temperature conditions long time, it will cause body biologytroubled and cause directions to central nervous system. If this processingcontinues, it will cause chronic headache.The project shall execute some measurements in order to reduce affects ofwaste heat to operators, so in general, the affects of the excess heat are small.

3.1.2.2.2.3 Impact on socio-economy

The construction and operation of Long Phu No.1 TPP create positiveefficiencies for socio-economic development as improve the performance ofland exploitation, resolving employment, energy supply full and stability foreconomic development, improve infrastructure system.In the project area has a communal house, besides not have the historical,cultural, religious, and nature so this impacts is negligible.

3.1.3 Risks and problems

3.1.3.1 Risks and problems in construction phase

3.1.3.1.1 Impacted objects related to waste in construction phase

Fire hazard and accident at workWith large construction work quantity and construction time, labour accidentscould happen easily, so it is necessary to be interested in as soon as possibleand done seriously during construction phase. Risk of industrial accidentregularly happen during construction phase consists of equipment installationat high elevation, installation of over-size and over-weight equipments.However, application of morden technical and technological measures andseriously implementing regulations and operation procedures as well asregularly monitoring and maintaining as stipulated will limit these impacts tominimum.Beside, fuel tanks are implicit environmental threat during construction phase.Oil leakage and construction activities as: autogenous welding and electricalshock are threats which could cause fire hazard in construction site. Thus,safety measures applied storages (specially fuel tanks) will be interested in andbe controlled seriously.

3.1.3.1.2 Impacted objects related to waste in operation phase

Risk of collision, shipwreck, bargewreckCollision, shipwreck, bargewreck may be by:- Carry the goods that exceed the loading capacity;- Ships/barges operation don’t meet regulation;- Headlight and alarm lamp system is failed, ship and tank are defect, crack


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or don’t guarantee durability enough;- Ships/barges run at river or come to the port at bad weather;- Ships/barges have the collisions suddently.Risk of depression and erosionReasons make depression and erosion as:- Constructions don’t guarantee design standards;- Managing and making harbor are not invalid with regulations.Oil-overflow problem and oil transportation pipe breaking- detonationDO liquid fuel is used as secondary fuel to start or to burn concomitant. Liquidfuel will be supplied by oil ship 1,000DWT.Source can cause oil-overflow, including:- Colision, shipwreck, bargewrecks;- Leakage of fuel oil when loading or unloading the fuel oil;- Having holes in ships/barges due to collisions;- Tub containing oil breaking: reasonably be not good in quality, manufacture

technique and maintaining processing, checking of factory;- Oil transportation pipe breaking- detonation: main reasonably stopping pipe

system in fitting up period (building) or in operating process;- Oil transported ship have problem at port receiving oil.While they loss in environment, oil and organic matters evaporate easily, switchto gas fast enclosed the specific smell and dispersing into atmosphere. Agentcause air environment pollution in this case is hydrocarbon derivatives – whicheasily harm to people health in a gap of determined concentration.If oil-overflow is not collected and safety eliminated, it will overflow soil andabsorb into underground water. It cause water source and land pollution. Someimpacts include:- While oil-overflow cause surface water pollution, they do reducing shored-

lived organism density significantly, special is Hau river , can change a partof ecosystem structure or fauna in river area, directly effectiveness to qualityof aquatic feeding environment, natural breeding source, food chain ofecosystem. So, multi-biology and water-bird food source will be reduced;

- While oil content in water is higher than 0,2mg/l, water will have a badsmell. The pollution cause reducing ability of water cleaning themselves,because they killed plankton organism and organism living bottom whichjoin in the cleaning themselves processing. Wastewater having oil stillcause exhaustion of Oxy in water source, because it use Oxy for hydrocarbonOxy-ize processing and cover water surface which do not give Oxy recyclefrom air and water source;

- While oil content in water from 0,1-0,5mg/l will cause productivity and fish


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quality reducing. Oil standard in fish breeding sources is not over 0.05 mg/l,Oxy dissolves standard is ≥ 6 mgO2/l;

- Oil in water will be transferred to harmful mix to people and water-organism,such as phenol, Chlorine conductivities of phenol. Allowing phenol standardin life supplying water source (running water) is 0,001mg/l;

- Oil, breaking up products of oil absorb into soil causing directly to plantingor reducing ability breaking up of soil micro-organism. Then, it doesreducing soft and rich of soil, indirectly effect to planting productivity.

Fire – detonation problemFire can occur in storing-tub area and coal storage. Coal fire and HFO, DO oilwill cause serious impact on environment of the plant and surrounded areas.Air temperature is high and low wet in dry season in the project area. Hence, fuelstoring fire can occur easily, special while high hydrocarbon concentration in airand meet lighter source.The modern technologies, techniques is applied by Long Phu No.1 thermal powerplant having assign, operating fit processing along with checking processing,maintaining seriously, right assign; this impact will be limited minimize and isassessed that is minor, can controlled and diminished.

Risk of breaking dike of residue disposal areaRisk of breaking dike of residue disposal area can occur in construction andconsolidation of dike. Some impacts can appear due to breaking dike such as:- Residue waste water has high pH, high SS concentration, contain dissolved

heavy metals and some chemicals origin HCO3-, Cl- ... will cause soil and

water pollutions.- Dust can be occured from scattering residue due to breaking dike.However, the project had a geological survey; and dike of residue disposalarea will be designed following technical requirements in order to minimizerisk of breaking dike..

Work accident in management and maintainingDuring management, repairment and maintaining, work accidents may happenif officers don’t execute serious safe regulations.Besides, other break – downs as lightning strike, fastening together electriclines, detonating combustion, waterlogged in raining season, are able tohappen to make harmful for plant, human and environments. In moderntechnique environmental, officers have to training methodical, regular, and indesigning process, characteristics of hydrometeorology, area geology,guarantee regulations and closely operating management have to beresearched, so these accidents are very low.


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Table 3-25 Environmental matrix

ENVIRONMENTAL AND SOCIO-ECONOMIC PARAMETERS

Natural resources Ecosystem Socio-economic Living standard of thepeople

Air Soil WaterACTIVITIES

1. CONSTRUCTION PHASE

Transportation of construction materialand equipment -2 -1 -1 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 -2 0 0 -1 0 0 0

River bed dredging and port construction -1 -1 0 0 -1 -1 0 0 -2 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0Construction works of the project -1 -1 -2 -1 0 -1 0 -1 0 -1 0 0 0 0 0 0 0 0 0 -1 0 -1 0 0 -1Workers concentration 0 -1 0 0 0 -1 -1 0 0 -1 0 0 -1 0 0 0 0 0 0 0 1 -1 -1 0 0Fire safety, work and traffic accident -1 0 0 -1 0 -1 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 -2 0 0 0Sub-total 1 -5 -4 -3 -2 -1 -5 -1 -1 -2 -2 0 0 -1 -1 0 0 0 -1 -2 -1 1 -5 -1 0 -12. OPERATION PHASE

Using water for cooling 0 0 -1 0 -1 0 0 0 -2 0 0 0 0 0 0 0 0 -1 -1 0 0 0 0 0 0Cooling water discharge 0 0 -1 0 -1 0 0 0 -1 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0Industrial and domestic wastewater 0 0 -1 0 -1 -1 0 0 -1 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0Exhaust emission -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Coal pick-up, transportation and storage -1 0 0 -1 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0


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ENVIRONMENTAL AND SOCIO-ECONOMIC PARAMETERS

Natural resources Ecosystem Socio-economic Living standard of thepeople

Air Soil WaterACTIVITIES

Ash collection and discharge -1 0 0 -1 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Activities of operation workers 0 0 0 -1 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Production waste discharge 0 0 0 -1 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Residual heat -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Oil spill, oil pipe system breakdownaccident -1 0 0 -1 0 -1 -1 -1 -1 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0

Fire and accident at work -1 0 0 -1 0 -1 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 -2 0 0 0Activities of receiving port -1 -1 0 -1 0 -1 0 0 -1 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0Sub-total 2 -7 -1 -3 -7 -3 -8 -1 -1 -6 0 0 0 0 -1 0 0 0 -4 -2 0 0 -2 0 0 0TOTAL -12 -5 -6 -9 -4 -13 -2 -2 -7 -2 0 0 -1 -2 0 0 0 -5 -4 -1 1 -7 -1 0 -1

Notes:Scale value from 0 to 3; 0: that means no impact or insignificant; 1: low impacts; 2: moderate impacts; 3: strong impacts; sign “-“ is negativeimpacts, “+” is positive impacts.


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Remark:

Based on above environmental matrix, it is defined negative and positiveimpacts for each project’s phase as below:During construction phase, significant negative impacts are public health (-5),air pollution (-5), pollution of surface water (-5). However, activities ofeconomy and small scale business in the project area are positive factors (+1).In operation phase, negative impacts on aquatic life (-6) and surface waterquality (-8) caused by intake and discharge of cooling water into Hau Riverare dominant. In addition, negative impacts on ambient air and soil quality (-7)also need to be considered.

3.2 COMMENTS ON DETAIL AND CONFIDENCE OF ASSESSMENTS

As mentioned in Chapter 1, some methods are used to assess environmentalimpacts of the project including:- FieldSurvey field to collecting environment samples, figures, observation naturalenvironment actual state, social economic.- Laboratory methodsAnalyzing collected quality of environment sample in order to basedenvironment field assessment.- ComparisonBased on survey results, survey at field, and analysis result in laboratory andcalculated result following comparison theory with Vietnamese standard todefine environment quality at the project area.- StatisticsUsing statistics methods in collecting and classification field figures aboutnatural conditions, sociology survey data in leader interviewing processingand local citizen.- Map methodUsing maps define project position, scale and affected level.- Rapid assessmentRapid assessment method of World Health Organization, (WHO) proposes, isapplied in these cases, as:

o Assessing tonnage waste-air pollution and wastewater of factory;o Assessing efficiency of pollution prevention methods.

- Environment modelingModeling methods were applied to reproducing of pollution dispersingprocessing from source to surround. Applied models as:


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o To evaluate the forecast exhaust, using Breeze AERMOD GIS Prosoftware by Trinity company based on the model AERMOD Bureau ofenvironmental protection in the U.S. (U.S. Environmental ProtectionAgency EPA) to export, this software is used to calculate and predictevents spread of cells pollution in the air. Model AERMOD modelsreplaced ISC3 (Industrial Source Complex Model) by EPA (1995), forthe calculation of the concentration of pollution and scope resourcesfrom waste industrial complex.

o Computational simulation of the spread of the water cooling of power on1 Long Phu Hau River is the Applied Mechanics Vietnam made, usingthe system-FAST2D SW (Surface Water Flow and Solute Transport in 2Dimensions), which used methods can limit the property to determine agood number of the process flow and temperature.

These methods were studied and announced on professional documents. Theyare much exacted; supply fairly completed necessary information to doingassessment, forecasted environment impacts. So, they are fairly strong basicinformation to build environment monitoring programming in building andoperational the project periods.However, in calculated processing about exhaust fumes dispersing andspreading heating, figures of entering source (meteorological, hydrographic)were not enough, eliminated figures of factory were not really exactly(because factory does not operate yet). The project does not have necessarydata to adjustment. So, when the project operate, it will continue collectingnecessary data to model adjustment in order to having exactly forecasted moreabout these two processing.


Page 4-1

CH NG 4CHAPTER 4: MEASURES FOR MITIGATING

ADVERSE IMPACTS AND PREVENTINGENVIRONMENTAL PROBLEMS

With impacts as mentioned in the chapter 3 (for all phases of the projectimplementation), measures for mitigating adverse impacts will be carried out.

4.1 FOR ADVERSE IMPACTS

4.1.1 Mitigation measures related to waste

4.1.1.1 Mitigation measures related to waste in construction phase

Mitigation measures in construction phase be included in construction contractin order to ensure that they will be carried out by the contractors andcontrolled by PMB.

4.1.1.1.1 Mitigating impact on air environment

Air pollution is one of important problems in the construction period.Following measures are proposed to mitigate air pollution.- Transportation of devices, materials and heavy equipments must use

specialized vehicles. Transport vehicles must be checked before use.Strings and ropes must be firm and safe. Transportation needs to conform tosafety regulations.

- To adjust vehicle density on the roads in order to reduce affects on thetraffic in the area.

- To salvage existing river traffic.- To monitor air environment in construction site in the project area and

surrounding areas with parameters such as dust, SO2, NO2, CO,hydrocacbon.

Advantage: these measures are feasible, simple and easily done. They are inconformity with capability of construction contractors. They are very efficientin case monitoring is done fully and strictly.Disadvantage: these measures only mitigate the impact. They strictly repairthe impact

4.1.1.1.2 Mitigating impact of noise and vibration

Following measures will be applied:- To equip noise-killer (stopper for ear) for construction workers when they

work at places with high noise level.


Page 4-2

- To build barriers in the project area since the beginning of the constructionphase in order to reduce noise and dust from the project into surroundingarea.

- The project will arrange all noise sources such as arrange concrete mixingstation, electric generator, etc. in appropriate places.

- All construction activities are carried out in daytime and earlier 10pm. To limitconstruction activities causing noise in the evening (after 10pm), if have, thePMB will inform local people in order to avoid impact on health of localpeople.

- To use methods and equipments with low noise and vibration levels- Vehicles for materials transportation are not allowed to cause noise. Drivers

only honk if it is necessary.- Measures relating to construction activities of contractors will be included

in tender document and considered in contractor choice.Advantage and disadvantage:- These measures are simple and easy to do.- To have commitment of construction contractor and control of the PMB.- Only mitigate the impact. Not strictly repair the impact.

4.1.1.1.3 Mitigating impact on water environment

Measures are proposed as follows:- Not discard solid waste (constructed waste, sand, stone, etc.) and sludge oil

of constructed machine into water source. All waste must be collected andtransferred to waste treatment place according to regulations of the local.

- Cooling water discharge and receiving canals are built in the possibleshortest period. To limit devolution and increase of turbidity of surfacewater.

- Not create ponds, pools in construction areas to prevent water contaminationand growth of fly, mosquito and mouse in order to protect health of localpeople.

- To limit overflow rain-water into oil-contained areas, machine andexcavation areas.

- To arrange storehouses of materials in safe sites. To avoid oil overflow andhave timely emergency measures in case of happened risk during theconstruction period in order to limit pollution of surface water andunderground water.

- To not discard domestic wastes (waste water and solid waste) fromconstruction camps into water source. All domestic wastes will be collected,transported and treated by a contract with Urban Environment Company ofSoc Trang city.


Page 4-3

- To arrange outhouses with septic tank for construction workers inconstruction sites.

Advantage and disadvantage:- These measures are simple and easy to do.- These measures mainly depend on environment protection sense of

construction workers. Thus, it is necessary to combine with educationmethods, reward, punish and control of the PMB.

4.1.1.1.4 Mitigating impact of solid waste

In order to mitigate impacts on soil environment from construction solid wasteand domestic waste, waste collection and treatment are as follows:- Domestic solid waste in the construction period will be collected daily and

disposed at a landfill (near the ash disposal area). The project will contractwith Urban Environment Company of Soc Trang city to treat this domesticsolid waste. Every week, the Urban Environment Company of Soc Trang citywill collect and transport them to an appropriate sanitation treatment place.

- Cement bag, barrel and discarded wood log will be collected and/or sold toscrap dealers.

- Discarded soil and mud are not allowed to discard to pond, river, canal.They will be disposed at prescribed places or sold to local people forbackfill at appropriate places. Balance calculation for excavation is done inorder to rationalize soil quantity for transportation and soil use at sites.

- According to proposal of Long Phu district People’s Committee, mud fromdredging river for whart route will be used to aggrade some areas such asTran De Commercial Zone, Brick-kiln of Long Duc commune,Resettlement site of Long Phu Power Complex).

Advantage and disadvantage:- These measures are simple and easy to do.- These measures will bring good effect in case construction contractor and

worker are conscious and educated on environment protection, and controlledby the PMB.

4.1.1.1.5 Mitigating impact of hazadous waste

Hazadous waste in the construction phase is mainly eliminated oil frommachines, equipments and means for the construction, vehicles, oily clout, ...The project will contract with a hazardous waste treatment professionalcompany (has work permit) to transport and treat hazardous waste types atconstruction sites.The collection, storage and transportation will conform to hazardous wastemanagement regulations in the Circular No.12/2006/TT-BTNMT of Ministryof Resources and Environment on hazardous waste management.


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4.1.1.2 Mitigation measures related to waste in operation phase

4.1.1.2.1 Mitigating impact on air environment

4.1.1.2.1.1 Mitigating impact of exhaust gas of the plant

As mentioned in Chapter 3, concentration of dust and SO2 in exhaust gas ofthe plant is over permited value in TCVN 7440:2005. Thus, the plant willinstall a gas treatment system with equipments and treatment efficiency suchas:

Table 4-1 Efficiency of dust and sulfur removal system

Calculatedparameter

Conc. beforetreatment(mg/Nm3)

TCVN7440: 2005(mg/Nm3)

RequiredEff.(%)

SelectedEff.(%)

Conc. aftertreatment(mg/Nm3)

Emissionrate aftertreatment

(g/s)Dust 13,122.47 168 98.72 99 131.22 124.67

SO2 2,002.69 420 79.03 85 300.40 315.35

Therefore, after installing dust and sulfur removal systems (with the efficiencyare 99% and 85% respectively), concentration of pollutants of exhausted gaswill meet permited level in TCVN 7440:2005 (for dust and SO2) and TCVN5939:2005 (for CO).Dust removal (Electrostatic Precipitator – ESP):Electrostatic Precipitator was Oliver Lodge's development in 1885. Until 1907the FG Gottrell manufactured and put into commercial operation in the UnitedStates.The electrostatic precipitator uses electrostatic method to collect dust. The fluegas laden with fly ash is sent through discharge electrodes which give theparticles a negative charge. The particles are then routed past positive plates(grounded collection electrodes), which attract the now negative ash particles.The particles stick to the collection plates until they are collected. Removal isaccomplished by a mechanical rapper system knocking the ash particulatematter off the collecting plates and dropping it into a hopper at the bottom ofthe precipitator. Then the ash particulate will be discharged to the ash and slagdischarge system or the ash silo.Each ESP includes:- Discharge electrode,- Collecting electrode,- Rapping mechanism for cleaning,- Transformer – rectifier,- Ash hoppers.Discharge electrodes are fastened in a support frame. The support frame itselfis suspended from the casing of the electrostatic precipitator by insulators. The


Page 4-5

insulators are heated to prevent condensation in the insulators during start-up/low load operation or shut-down.The earthed collecting electrodes are arranged in parallel rows formingindividual gas passages. The lower ends of the electrodes are firmly attractedto rapper bars.The rapping mechanism consists of an electric motor, the connecting rods andthe hammers.Each electric field is fed by a high-voltage installation. The overall installationfor electrical supply consists of the high voltage rectifier set and the lowvoltage switching cubicle. The precipitator voltage regulator is electronicallycontrolled on the basis of flashover density to achieve maximum flue gascleaning efficiency.The precipitators are equipped with the ash hoppers below them. The hoppersare heated during start-up, low load operation of the system. Level meters areattached to the hopper for high level alarming.The ESP is operated by an own control center with a signal exchange to themain control room.In case, the Electrostatic Precipitator (ESP) has break-down, operationcapacity of the plant will be reduced for the shortest maintenanceSOx removal (Flue Gas Desulfurization – FGD):The plant will apply the chemical absorbing process to treat SOx withlimestones agent. Flue Gas Desulfurization by Wet Limestone Scrubbers isselected because it is in accordance with coal type having high content ofsulphur, not impact on the electrostatic precipitator (ESP), and have a highefficiency.This method is very popular in the world and has been proved throughmanufacture and operation. In this method, the flue gas from boiler carryingSOx will be directed to the wet absorption tower. There, SOx is absorbed bylimestone slurry and turns into Calcium sulphite and calcium sulfate accordingto following reactions:

- SO2 + H2O = H2SO3

- CaCO3 + SO2 + 1/2H2O = CaSO3.1/2H2O + CO2

- CaSO3.1/2H2O + 1/2 O2 + 3/2 H2O = CaSO4.2H2OThe operation process of FGD is as following: the limestone after transport tothe plant being stored in the storehouse with the roofs. Here, it is grindedsmoothly and mixed with the highly pH water from cinder and ejected into theabsorbing tower.The suspension of the limestone is ejected into the tower from the top to thebottom, then the air emission goes up. There are reactions of the chemicalsand the sulfur composition in the tower to reduce the concentration of SOx.The mixed solution of the humid gypsum is pumped to the vacuum filtering


Page 4-6

model to dewater. Right here, the gypsum is dewatered to the humidity of 15%and then keep in the gypsum storehouse. This gypsum product can be packedand supplied for construction materials.When there is no demand of gypsum, the gypsum solution can be dischargedto the holes of the cinder pump station to transport to residue disposal area.The FGD of the 2x600MW Long Phu 1 power plant comprises followingitems:- 02 x 50% limestone conveyors to convey limestone form the berth to the

silos;- 02 limestone silos with storage capacity for 14 days;- 02 x 100% limestone grinding and supplying chains, each chain can supply

limestone for 02 units.- 02 SOx absorber modules, each for one unit,- 03 x 50% vaccum belt filter trains, each for 01 FGD and 01 stand-by;- Valve and piping systems for flue gas;- The gas-gas heater (GGH) for each unit;- Gypsum storage and conveyor system to transport gypsum to the port;- Make-up water tank for FGD;- Port and limestone unloading equipments from barge to silos of each power

plant;- Port and gypsum loading equipments for barge.Required limestones amount of the Long Phu 1 TPP is estimated as 11,676kg/hour.Generated gypsum amout is about 13,752.94 kg/hour (coal Arutmin 0.53%S)and 21,735.08 kg/hour (coal Arutmin 0.86%S).This method has a high efficiency and gives gypsum as a by-product having ahigh commercial value. However, in this method, the absorbent is used onlyonce and then it will be wasted. This SCR is installed behind the ESP.Exhaust gas treatment process:

Exhaust gas of the plant is blowed to the electrostatic precipitator with thetreatment efficiency as 99% so as to reduce the dust concentration to meetVietnamese Standards TCVN 7440:2005. The electrostatic precipitatoroperates according to the principle of the settling equipments under the effectsof the electric field. Dust removed from the electrostatic precipitator is storedin cyclos and periodically transported to the residue disposal area by watercurrent.Air after dust removal containing SO2 is blowed to the SO2 removal system(FGD). The SO2 removal system uses the absorption prosess used thesuspended limestone solution and being circulated. With the treatmentefficiency of the equipment as 85%, concentration of SO2 in the output will


Page 4-7

meet TCVN 7440:2005.Like this, exhaust gas of the plant after this treatment system ensures to meetTCVN 7440:2005, it will be discharge into the environment by the stacksystem, including:- The steel reinforce concrete outer is painted with color as stipulated in

aeronautical notice and it is furnished with access doors for ash removal,equipment transportation as well as the connection with gas passes.

- Two gas passes with inner diameter of 6,280mm with structure as follows:steel pipe trunk made by steel plate with 10-15mm according to positions.Inner of pipe is lined with anti-corrosion layer of inorganic foamedborosilicate glass blocks, they are fixed in the steel pipe and linked togetherby specific glue and mortar. The anti-corrosion blocks with about 40mmthickness including the glue layers are withstand up to 1990C temperature.Inner diameter inside the in the anti-corrosion layer is 6,200mm enough fordesigned flue gas velocity of 20 -25 m/s.

- 01 lightning system designed according IEC standards comprisesconductor, grounding wire, and grounding system.

- 01 aeronautical signal lamp system.- 01 elevator for maintenance with loading capacity of about 500kg;- 01 system of holes for monitoring, controlling flue gas.Calculation results by Breeze AERMOD GIS Pro software show thatconcentration of air pollutants is lower than permited value in TCVN5937:2005.In addition, the project will apply mitigation measures as:- Selecting optimal method of burning and using of fuel with high quality

(low ash, low sulfur, low nitrogen and high heat value).- Planting trees within and around the plant.- Complying with environmental monitoring plan in the plant area and

surrounding area.

4.1.1.2.1.2 Mitigating impact of dust in the port area

- Planting trees and vegetal carpets.- Using the specialized vehicles to spray water frequently twice a day at 11

o’clock and 14 o’clock.- Using closed conveyor to transport coal to the storehouse to reduce dust

pollution inside the ports and the plant area.- Frequently cleaning the port area, conveyor... and collect scattering

materials.- Harmonizing reasonable density of ships, barges on the port.- Using equipments, machines, ships, barges with high quality, saving


Page 4-8

energy, and maintaining periodically.- Monitoring air quality in the port area.

4.1.1.2.1.3 Mitigating impact of dust due to coal transportation

- Using specialized ships to transport coal to the plant area.- Using closed conveyor to transport coal to the storehouses.- Frequently cleaning conveyor.- Periodically maintaining conveyor and other specialized equipments.

4.1.1.2.1.4 Mitigating impact of dust in coal storehouses area

As assessed in article 3.1.2.1.2.1.4, the project has 2 alternatives of coalstorehouse. In order to reduce invetment cost and risk of fire, the alternativeNo.2 is selected, and the alternative No.1 will be selected if price of thecontractor is attractive.With the alternative No.2, storage process and transportation of coal fromconveyor to outdoor storehouse will cause dust and impact on air quality.Calculation result shows that process of coal storage and loaling, averageconcentration per hour of dust in around area is 0.362 mg/m3 or 0.604 mg/m3,it is over permited value in TCVN 5937-2005 on ambient air quality (0.3mg/m3).Hence, the project will apply measures as follows:- Putting correctly the quantities of coal to avoid storage overloading.- Spraying water to reduce dust in outdoor storagehouse.- Using the specialized vehicles to spray water frequently twice a day at 11

o’clock and 14 o’clock.- Installing wind field fence in order to reduce diffusion of dust.- Monitoring air quality in around storagehouse area.With measures such as spraying water and installing wind field fence 18m inheight, it will reduce over 55% dust amount into around area, so concentrationof dust in around area is 0.27 mg/m3 as maximum, meeting TCVN 5937-2005.

4.1.1.2.1.5 Mitigating impact of dust due to coal residue discharge

- Using specialized trucks or specialized barges to transport coal residue,using closed conveyor to transport coal residue (in case of coal residue usedas additive substance for cement production).

- Having management measures in residue disposal area, and forbidingresidue exploitation activities of local people.

- Planting trees within and around the plant.


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4.1.1.2.1.6 Mitigating impact of dust in limestone storehouses area

- Having the roof in limestone storehouses area.- Putting correctly the quantities of limestone to avoid storage overloading.- Spraying water in around area.- Frequently cleaning storagehouse and collecting scattering limestones (if

any).

4.1.1.2.1.7 Mitigating impact of VOC from fuel storage tanks

In order to reduce and solve overflow, evaporation and leakage of oil in the oilstorage tank area, the project will:- The tank must be designed correctly on technology; pipeline, pumps and

valves system have to operate at the designed capacity.- To check regularly the stable operation of oil pump system, valves and

installing the floats against evaporation inside of the tanks.- Checking regularly the tight-fitting level of pumps and pipeline systems.- Maintaining regularly equipments and machines.- Installing water-spraying system to cool the storage tanks in the hot days.- The operation conforms to the regulations.Measures to minimize impact of air environment will bring efficiency to helpreduce impact of the project to the environment and people. However, theimplementation cost is quite high.

4.1.1.2.2 Mitigating impact of noise

To limit noise and vibration, receiving port of the project will apply followingmeasures:- Activities of unloading installation, conveyor belt and petro pumping

equipment from barges to storage were carried out during the day and endbefore 10.pm. In case actual necessary work after 10.pm, the project is verylimited to avoid prolonged affect the area.

- Planting trees around the area to reduce spread of noise.- There are plans to track, maintain (checking lubricate oil, changing failed

details...) for all equipment and operation of port.At the plant, the noise is an important problem when the power plant operates.The noise is generated from activities of machines and equipments in areas ofboiler, turbine, combustion chamber, chimney, etc. Measures for mitigatingimpact of the noise are applied as follows:- Diameter of the chimney is calculated so that exhaust gas rate is from

20m/s to 25m/s to avoid the noise.- To reduce the noise to the minimum at the sources by designing and


Page 4-10

installing dampers for machines and equipments. To check and maintainfrequently these dampers in order to ensure operation of them.

- To isolate the noise-causing areas (boiler, turbine, combustion chamber) bya 100mm brick wall, 10mm plywood ceiling (this measure will reduce noiseby 6 - 8 dBA); or building two 100mm-width brick walls together, betweeninserting glass fibre, husk, coconut fiber, dried sand … and making ceilingof a 10mm plywood layer (this measure will reduced the noise by 12 -15dBA).

- To arrange reasonably machines and equipments to not concentrate thenoise-causing machines in narrow areas.

- To install anti-noise buffer to leg of ventifator and air compressor.- To check machine attrition level, to lubricate periodically or replace the

broken-down machine components in order to reduce the noise to theminimum.

- To obey the operation process.- To equip dampers for workers. To oblige them to use these equipments

frequently.- To plant vegetations in the plant precinct and surrounding area to prevent

and absorb the noise.With these measures, project implementation cost will be higher. But thisproblem is not considerable because the project will meet technicalrequirements and obey environmental regulations.

4.1.1.2.3 Mitigating impact on water environment

To minimize impact of waste water, the project will implement followingmeasures:- Flow division: discharge system of surface water, waste water, cooling

water will be separated. Cooling water, rain water and overflow water willbe not treated. Others will be treated appropriately to economize energy andreduce significantly water volume which needs to be treated.

- All waste waters such as oil-contained water, chemical-contained water,domestic waste water, etc. will be treated to meet Vietnamese standard onenvironment. Because the waste water will be discharged into the Hau riverwhich is a water supply source of life as well as aquatic organismprotection, the Vietnamese Standard 5945 – 2005, type A will be applied indesign of waste water treatment system.

- To unblock always drainage system, arrange soakage pits and residuecollecting baskets at necessary sites. The residue will be collected andgathered together with domestic waste of the power plant. All will betransferred to dumping grounds according to contract with waste collectionservice of the local.

Main waste water treatment system of the plant is shown article 4.1.1.2.3.7.


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4.1.1.2.3.1 Mitigating impact of overflow rainwater

Overflow rainwater of the plant in operator phase is two types:a. For types of rainwater falling on roofs, road surface and other locationswithout spilling of waste and oil is clean conventional rainwater, will becollected and exit in a particular systems, without the period of processing.Therefore, in factory, storage, office, the project will construct soakage spit,concrete drains and ditches system with lid to facilitate drainage of rain to bethoroughly.b. Oil-contained rain water: to prevent oil pollution due to oil leakage and oil-contained rain water, the project will build a dam surrounding the oil storagetanks. The volume of the dam is 1.1 times compared to the volume of thetanks. Oil removal tanks, decantation pit, pipe, pipeline system and valves arearranged as Figure 4.1 to discharge rain water in the oil storage tank area:- Overflow rain water in the oil storage tank area is collected based on the

dam;- At the first 15 minutes of the rain, rain water would be contaminated by oil,

so this water source will flow to the oil removal tank , then it will flow tothe main waste water treatment system for again treatment (please to seeFigure 4-1 for diagram of oil-contained waste water treatment process).According to this diagram, when opening the valve No.1 and closing thevalve No.2, rain water will flow to the oil removal tank. After that, the rainwater will flow to the main waste water treatment system for againtreatment. Collected oil will be stored, reused and reprocessed. After 15minutes of the rain, closing the valve No.1 and opening the valve No.2, therain water will flow directly to the drainage system and Hau river.

- After 15 minutes of the rain, rain water is not necessary to flow to the oilremoval tank, it discharges directly to the drainage system.

Figure 4-1 Diagram of oil-contained rainwater treatment process


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4.1.1.2.3.2 Mitigating impact of waste water from ash removal system

Residue waste water is high pH, high concentration of SS, dissolve heavymetals, some of agent of HCO3

-, Cl-, … Volume is approximately 600m3/day.Water from the ash discharge system often has an amount of acid dissolvedfrom ash so that it can not be discharged to the surroundings withouttreatment. Moreover, to economize water, this water after settling down willbe treated by chemicals and pumped back to the slurry pit to reuse. The re-circulation system includes:- Returned water basin 1,000m3

- Chemical treatment station- Sediment water pump: 3x50% (3x 250m3/h)- Sediment water pipelines: 1x D 200mm pipeline as planned.

Figure 4-2 Treatment waste water from ash discharge system

Capacity of this system is 25 m3/h.To mitigate impact of residue waste water, the ash pond is designed for water-proof applying CMC method around the pond. The bed of pond after beingreinforced by low impermeability as bentonite, it is lined with HDPE.

4.1.1.2.3.3 Mitigating impact of domestic waste water

Domestic waste water is about 180m3/day (85% of domestic water demand). Itcontains organic, suspensoid solid, nutrient (N, P), microorganism, … If itisn’t treated, it would reduce water quality and facilitated developing andspreading epidemic diseases.In Vietnam, domestic waste water is always treated by anaerobic digestionmethod and septic tank. The septic tank has two functions: sedimentation andsediment disintegration with BOD treatment efficiency from 70% to 80%. Thesediment exists in the tank from 6 months to 8 months. With effect of anaerobicmicroorganism, organic substances are disintegrated, a part of them becomesgas, the remains become dissolved inorganic substances. Waste water from theseptic tank flows to the central waste water treatment system for again treatmentbefore discharge into the Hau river. The septic tank is a group of 3 tanks in asump with size 10mx10m.

Waste water fromash disposal area

Reuse forfollowing ash

dischargeReturnedwater tower

Returnedwater basin

Chemical treatment

Outputwater


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Figure 4-3 The septic tank with 3 partitions

Building the septic tank for preliminary treatment of waste water beforeflowing to main treatment system is feasible to reduce pressure of the maintreatment system with low build cost and high efficiency (70 - 80%).

Figure 4-4 Domestic waste water treatment system

4.1.1.2.3.4 Mitigating impact of waste water from coal storage area and washingconveyor

Waste water from coal storage area and washing conveyor contains coal dustand solid substances. It will be collected to a deposition tank near coal storage.Volume of this waste water is about 95m3/day.A part of collected coal will be utilized. Unutilized coal part will be dischargein to ash disposal area.Waste water after the deposition will be led to the main waste water treatmentsystem of the power plant.

Figure 4-5 Coal-contained waste water treatment system

Main waste watertreatment system

Screening

Waste water from coal storage areaand washing conveyor

Deposition tank

Discharge into ashdisposal area

Coal for reuse

Inputwater

Excrement tank Waste water tank

Domestic wastewater

Screening Septictank

General containtank (equalization

tank)


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4.1.1.2.3.5 Mitigating impact of oil-contained waste water

Oil-contained waste water is generated from: washing of oil storage tanks,washing of floors, waste oil, cooling of equipment, transformers, etc.Discharge is about 13m3/day.This waste water contains a relatively great oil quantity (estimated about500mg/liter) will be flowed to a storage tank to be treated before discharge.The oil-contained waste water is collected to a small decantation pit. Then itflows to the oil removal tank. Water from this tank flows to the main wastewater treatment system for again treatment.The project manager will contract to hazardous waste treatment professionalcompany (has work permit) to transport and treat oil deposit to meet thecurrent regulation.

Figure 4-6 Diagram of oil-contained rainwater treatment process

Capacity of the system is 1.5m3/h (operation time 10hrs/day)

4.1.1.2.3.6 Mitigating impact of waste water from supply water treatment system,exhaust gas treatment system, waste waters from the boiler and services

Waste water from supply water treatment system (17 m3/day), air treatmentsystem (216 m3/day), rinsing the boiler (1,500 m3/time, 1-2 time for one year),cleaning of APH (1,000 m3/time, one time for one year), bottom of the boiler(1,000m3/ngày), washing chemical of the boiler (1,000m3/time, one time forone year) and servicing the plant (600 m3/day) will be collected to primarycontain tank, after that collecting to general contain tank of the main wastewater treatment system with other waste sources of the plant.


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Figure 4-7 Waste water treatment from supply water treatment system,gas treatment system and washing boiler

4.1.1.2.3.7 The main waste water treatment system

Waste water from diffirence sources as rain water and oil-contained wastewater after removal oil, domestic waste water, water from waste watertreatment system, exhaust gas treatment system, water from boiler areas,service waste water, … after preliminary treatment, waste water will becollected to the general contain tank of main waste water treatment system andcontinue to treatment process.The treatment capacity of main waste water treatment system is 71m3/h.The waste water in the equalization tank contains suspended solids, crushedcoal, discarded acid and/or alkali solution; thus, this waste water source needsto be settled and neutralized before discharge.It is mixed by air and then analyzed the concentration of acid and alkali toadjust pH. The neutral system of this type consists of main tanks such as acidtank, alkali tank, neutral tank, settling tank, filter tank, etc. In the neutral tank,have to fit stir part. This is the economical alternative but requiring closecontrol.In the neutralization process, sludge is created. Thus, waste water after theneutralization is settled by the settling tank. Settling process only separatessuspended solids but not separates dissolved substances because thesedissolved substances is very small. To increase the settling efficiency, it isnecessary to supplement the flocculators such as FeCl3. In the settling tank,liquid mud discharges to sludge storage tank, the water flows to a intermediatefilter tank and a activated carbon filter tank in order to increase the filterefficiency of the treatment system.In the intermediate filter tank, contaminants will be separated by washingprocess. Firstly, gas is blew into the tank to break the sand layer. Then,

O2

Waste water from supplywater treatment system Fan of

scouring air

Primary containtank

General containtank (equalization

tank)

Waste water from gastreatment system

Waste water from theboiler (washing, cleaningAPH, bottom of theboiler, …)

Waste water fromservices of the plant


Page 4-16

washing water is pumped in a reverse with a enough high speed to raise sandgrains in order to create suspended state. At that time, the contaminants whichadhere to filter sand, will be separated. Then, the washing water will bepumped back to a neutral tank to be treated.In the sludge storage tank, the sludge is pumped continuously into thesedimentation tank with supplementing flocculators to increase settlingefficiency. Finally, the sludge is pumped into the residue storage tank and waitfor collecting and transporting to the landfill. The water from thesedimentation tank is separated and pumped back to the equalization tank.Finally, the treated waste water will meet the Vietnamese Standard 5945-2005,type A and discharge with cooling water to Hau river.Main waste water treatment system of the plant is shown in figure 4-8, 4-9.The above treatment systems were studied and controlled in a lot of otherprojects and in many countries in the world. Therefore, they are feasible andapplicable for the project.

SLUDGE THICKNER PUMPS

FILTER SUPPLY TANK

HCl tank

Revised according to MOM No. 3430/BB-DKVN dated 14/05/2009 06-2009

09-2008Revised according to MOM No. 444/TB-EVN dated 11/09/2008

07-2008Revised according to MOM No. 242/TB-EVN dated 22/05/2008

3

2

1

TO ASH DISPOSAL SYSTEM SLUDGE SUMP

SLUDGE THICKNER

PUMPSCLARIFIER SLUDGE

CLARIFIERpH ADJUSTMENT TANKPUMPS

RETENTION WATERRETENTION TANKPRE-RETENSION TANK

CHP WASTE WATER PUMPS

WASTEWATER FROM COAL SYSTEM

SLUDGE SUMPTO ASH DISPOSAL SYSTEM

TRANSFER PUMPSSETTLING WASTEWATER

/ DISCHARGE PUMPSSLUDGE RECIRCULATION

SEWAGE TRASFER PUMPSPIT

SANITARY WASTEWATER

NaOH tank

From water treatment plant

API OUTLET PUMPSWATER BASIN

OILY SEPARATING BASINOILY WATER PUMPS

TRANSFER PUMPSBOILER AREA WASTEWATER

OF BOILER AREAWASTEWATER DRAIN PIT

WASTEWATER FROM FGD SYSTEM

WASTEWATER FROM BOILER AREA

FILTER BACKWASH WATER

WASTEWATER FROM PRETREATMENT SYSTEM

WASTEWATER OILY FROM OIL STORAGE AND BOILER AREA

COLLECTING SUMP

SETTLING TANK

OIL PIT

Ó

WATER PUMP

SANITARY WASTEWATER

AERATIONSEWAGE COLLECTING

CHP WASTEWATER

Ó

Designedby

Checkedby

EngineeringManager

ProjectManager

Head of deparrment

PETROVIETNAM

NguyeãnN.HTuaánNguyeãnN.HTuaán

6-2009Scale:

Basic designRev.: 3

VIETNAM ELECTRICITYPOWER ENGINEERING CONSULTING JS COMPANY 3

Nguyeãn N.TröôøngHoà Ñaêng Tieán

Nguyeãn K.Ngaân

27003C-NÑ-CN-23 1/1

BACKWASH PUMPS

DISCHARGE HAU RIVER

ABSORPTION TOWERACTIVATED CARBON

PRESSURE FILTERDUAL MEDIA

TRANSFER PUMPSFILTER WATER

COAGULANT DOSING PUMPS

COAGULANT DOSING TANK

Coagulant tank

WATER TREATMENT SYSTEM

WASTE WATER TREATMENT SYSTEMFLOW DIAGRAM

TREATED WATER TANK

Reinforced concrete, epoxy layer

Reinforced concrete, epoxy layer

Reinforced concrete, anti-chemical layer










PETROVIETNAM

HC: 35-2009

Nguyeãn N.H.TuaánNguyeãn N.H.Tuaán

Traàn Leâ Minh

Engineering Manager

3 05/2009Revised according to MOM No. 3430/BB-DKVN dated 14/05/2009

Revised according to MOM No. 444/TB-EVN dated 11/09/2008 15-09-20082

11-07-2008

ISSUED IMPLEMENTATIONCHECKREV. REV. CONTENTS

Revised according to MOM No. 242/TB-EVN dated 22/05/20081Nguyeãn N.Tröôøng

Designed by Hoà Ñaêng Tieán

Nguyeãn K.Ngaân

Checked by

Head of deparrmentHead of project

Vice director

1/1T.L:

D.A.Ñ.T

SITE PLAN

27003C-NÑ-CN-24

POWER ENGINEERING CONSULTING JS COMPANY 3VIET NAM ELECTRICITY

WASTE WATER TREATMENT STATION

6mW x 11.55mL

15mW x 11.55mL

16

15

14 13

1211

1098

7

6

5

4

3

2

4mW x 8mL x 4mH

12mW x 8mL x 4mH

6.5mW x 8mL x 5.8mH

10mDi x 6mH

10mDi x 6mH

4mW x 4mL x 3.5mH

2mW x 2mL x 4.5mH

16mW x 32mL x 4.5mH

8mW x 32mL x 4.5mH

1

320

320

1

1

5.5mW x 2mLHOUSE FOR AIR-BLOWER16

CHEMICAL STOREHOUSE 1

12013

14

15

TREATED WATER TANK 1

PUMP HOUSE 1

FILTER BACKWASH TANK12

FILTER SUPPLY TANK11

300SLUDGE THICKNER 1


STRUCTURE

4mW x 32mL x 4.5mH

6mDi x 5.5mH

7mW x 7mL x 5mH

3mW x 5mL x 5mH

2000

1000

500

40

170

20

170

30

300

DIMENSIONNO.

1

DESCRIPTION

PRE-PRETENTION TANK 1

QUANTITY VOLUME (m3)

2 RETENTION TANK 1

3

4

5

OILY SEPARATING BASIN 1

6

SEWAGE COLLECTING PIT 1

7

AERATION TANK 1

8

COLLECTED OIL TANK 1

9

10

SANITARY WASTEWATER SETTLING TANK 1

pH ADJUSTMENT TANK 1

CLARIFIER 1

1


Page 4-17

4.1.1.2.3.8 Mitigating impact from cooling waste water discharge

• Mitigating impact of water use for coolingIn order to mitigate losses of aquatic organism due to water use for cooling,below measures will be done:- To design suitable intake: intake is designed to ensure take water with a

velocity < 0.2 m/s in order to not impact on moving and breeding of aquaticanimal at this area.

- To install screens to prevent aquatic organism into the intake.Habit screenHabit screen uses one or some stimulant elements to direct fish to proposeddirection. It is designed based on habit of fish such as reflection with sound,light, flow and electric field. Screens with gas flow from compressed air sourceare very useful (power plant near Michigan lake). Fish is in a tendency to avoidunexpected change of the flow towards horizontal direction, but it adapts tochange of the flow towards vertical direction. This principle can be applied todesign flow change pieces or shields to mitigate knock of fish in the intake.In general, habit screens depend a lot on aquatic organism species and physicalelements such as temperature, radiation, sound and stratification.The Long Phu 1 power plant will install screens (traveling screens, fish bucketscreen) to prevent aquatic organism into the system. Besides, flow of water forcooling is not significant in comparison with flow of Hau river area, so aquaticorganism into intake is not significant as compared to plenty of aquaticorganism in the region.Screen installing alternative is very feasible and efficient in similar thermalpower projects. It makes sure technical particularities of water use for cooling ofthe project.

• Mitigating impact of cooling waste water dischargeLong Phu 1 power plant will use and discharge flow of cooling water is 56m3/s, temperature difference of discharged cooling water and input water is70C. The average temperature of Hau river is from 270C to 30,10C. Thetemperature difference between cooling water and input water is 70C, averagetemperature of cooling water at discharge site is from 340C to 37.10C. Accordingto the Vietnamese Standard 5945:2005, permitted discharged water is 400C (typeA), so temperature of cooling water at outlet meets this standard.According to results cooling water spread calculation in both 2 alternatives, atposition 200m far from the intake, maximum temperature difference due todischarge of cooling waste water is 0.40C. Thus, discharge of cooling wastewater does not increase significantly temperature of water at intake site as wellas cooling efficiency of the power plant.Chlorine will be added to cooling water for concentration of from 0.2ppm to0.3ppm. Chlorine adding process is operated automatically in order to control


Page 4-18

Chlorine concentration in water so as to not over permitted volume. With thismethod, Chlorine concentration in cooling water at outlet will meet theVietnamese Standard 5945:2005, type A.

4.1.1.2.4 Mitigating impact of solid waste

4.1.1.2.4.1 Mitigating impact of domestic solid waste

As mentioned above, domestic solid waste is from 112,5 kg/day to 135 kg/dayfrom activities of operation worker.All places in the power plant are equipped waste baskets to collect and classifythe waste at the sources:- Recyclable wastes such as discarded paper, carton, plastic, wood, etc. will

be collected and sold to waste-recycling units.- Biodegradable organic wastes such as leaf, food residue, etc. will be

collected daily and disposed at a landfill (near the ash disposal area). Theproject will contract with Urban Environment Company of Soc Trang cityto treat this domestic solid waste. Every week, the Urban EnvironmentCompany of Soc Trang city will collect and transport them to an appropriatesanitation treatment place.

These measures are feasible. It meets existing waste collection and treatment ofthe environment field. Implementation cost is low. Efficiency is high. However,abidance sense of workers is a key role in efficiency of this measure.

4.1.1.2.4.2 Mitigating impact of cinder

Yearly volume cinder of the plant is expected 69.88 tons/hour.Long Phu Power Complex has a ash disposal area with 35ha in area for LongPhu 1 power plant).Exploitation and use cinder of power plant as follows:a. Use cinder for cement plantsPECC3 send surveyed document to cement plants in South and Centralregions as: Ha Tien cement company - Kien Giang provine, Ha Tien No.1cement company, Ha Tien No.2 cement company, Holcim Viet Nam cementjoint-venture company, Lafarge cement joint-venture company fto ask opinionabout using ash and cinder. Results showed that:- Ha Tien No.2 cement company: if satisfy the standard of puzolan's natural,

capacity used fly ash about 150,000 ton/year (17% fly ash in PCB40cement).

- Lafarge cement joint-venture company: fly ash with good quality that willbe take care by the company. Now, the company has design capacity ofgrind cement being 500.000 ton/year PCB40 and will extend in the future.

- Other plants: do not give request.


Page 4-19

With ash and cinder are used as additive matter for cement production with10% - 20% of materials and total capacity of cement plants in Kien Giangprovince in period of 2010 later is 2.6 million tons cenment and 7.2 milliontons Clinker, total amount of ash and cinder used of cement plants in KienGiang province will be about 260,000 – 520,000 tons/year (for cementproduction) and about 720,000 tons/year (for clinker production), total is980,000 – 1,340,000 tons/year. It is a number of encouragement in comparisonwith the total amount of ash and cinder of the power complex 1.35 milliontons/year.b. Ability to use cinder to make concrete additivesIn concrete, fly ash is used to replace about 30% of cement, other thanreducing the amount of cement used for the hydropower but also greatlyincrease the durability of the works.Nowadays, fly ash is used to make concrete additives for the hydropowerproject.Volume of fly ash needed for concrete additives is no predictions, however thevolume of constructions for hydropower projects, ports, hydro projects arenow relatively lots, capacity of used cinder is relatively high.Conclusion: Long Phu power complex in general and Long Phu 1 power plantin particular in could condition, will supply direct the cinder to cement plantsin The Mekong River delta, at the same time establish storage area anddistribution cinder.

4.1.1.2.4.3 Mitigating impacts of gypsum, solid sediment from washing the boiler andwaste water treatment system

- Gypsum has been separated water, can be bread and supplying tomanufactory that product building material or transferred to the cinder yardof the plants.

- The residue from washing he boiler will be collected whenever thewashing. It is contained in tanks with cap and transferred to a sanitarylandfill by appropriate units.

- The sludge from water treatment process is transferred to the drying groundto create dry sludge, then, it is used to backfill at appropriate places ortransferred to the ash disposal area.

4.1.1.2.5 Mitigating impact of hazardous waste

As mentioned, hazardous waste of the power plant is oil sludge from washingof the oil storage tank, wrapping and oily clout.The project will contract with a hazardous waste treatment professionalcompany (has work permit) to transport and treat hazardous waste types of theplant. The collection, storage and transportation will conform to hazardouswaste management regulations in the Circular No.12/2006/TT-BTNMT ofMinistry of Resources and Environment on hazardous waste management.Implementation cost is from operation cost of the Long Phu 1 power plant.


Page 4-20

As domestic solid waste, classification and collection at sources of solid wastefrom production and hazardous waste is reasonable and feasible. Forimplementation, cost of the project is higher, but it is acceptable cost.

4.1.2 Mitigation measures no related to waste

4.1.2.1 Mitigation measures no related to waste in construction phase

4.1.2.1.1 Mitigating impact on soil environment

Erosion is an important problem and needs to be considered in the design andconstruction periods. Erosion is prevented by measures such as:- To design suitable water discharge system to avoid erosion.- To pave stone and pour concrete at drainage ditches along roadsides.- To build drainage ditches in sloping surfaces so that rain water flows into

these ditche.- To restore temporary affected area as initial status by plants.These measures will be detailed in design report of the project. In theconstruction period, soil erosion will be monitored to have necessaryadjustment methods of drainage ditch in order to minimize soil erosion.

4.1.2.1.2 Mitigating impact on ecosystem

In the construction period, the project nearly does not impact on ecosystembecause the clearance was fully done. However, the project still carries outnecessary measures in order to sure to avoid another clearance and randomclearance in unnecessary areas.- To have construction regulations and punish forms.- To appoint staffs to monitor.- To have an agreement of affected households and satisfactory compensation

in case of another clearance for temporary land use, and it is necessary tocommit to restore initial status after finished use.

Besides, transportation and construction will cause exhaust gas and dustaffecting on vegetation, so the project will carry out mitigation measuresmentioned in items 4.1.1.1.1 và 4.1.1.2.1.Advantage and disadvantage: these measures are efficient, feasible and easilydone. They need to have combination of construction contractors.

4.1.2.1.3 Mitigating impact on local landscape

The construction with activities such as concentration and transportation ofmaterials and machinery will affect to local landscape. The PMB will combinewith construction contractors to do measures such as: (i) collection at site, (ii)having barrier in construction sites, and (iii) restoring landscape after finished


Page 4-21

construction.

4.1.2.1.4 Mitigating impact on socio-economic status

In order to guarantee living conditions of construction workers and limitspread of communicable diseases due to concentration of workers (one of risksfor pressure increase of local health system), it is necessary to proposefollowing contents in the contract with construction contractors.- To build construction camps for workers in construction site.- To ensure hygiene requirement in construction camps.- Eat and drink must be hygienic.- To have hygienic bathrooms and toilets with septic tank for a large mount of

worker in construction site.- To have specific staffs to guide on environmental sanitation, labour safety

and labour technique for worker.- Construction contractors are responsible for environmental sanitation and

labour safety of worker at construction sites.- To have discipline for all workers, including temporary workers. The project

will inform and combine with local authorities to manage all employees ofthe project in order to avoid social evils and mitigate conflicts betweenworkers and local inhabitants.

Advantage and disadvantage: these measures are feasible efficient. However,it is necessary to have close combination between local authorities andcontractors (organizations directly manage all construction workers).

4.1.2.1.5 Mitigating impact on cultural, historical monuments

As mentioned in Chapter 3, the project only impacts on a communal house(Thanh Duc hamlet, Long Duc commune).However, due to affected from clearance of Nam Song Hau road project, thiscommunal house only has a gate and a house category 4th now (brick wall,tiled roof). This communal house not have historial value, mainly is a placefor commemoration of heroic martyrs and aspiration of harvest.The BMB will combine with local government and manager of this communalhouse to remove and rebuild the communal house in other place.

4.1.2.2 Mitigation measures no related to waste in operation phase

4.1.2.2.1 Mitigating impact on estuary ecosystem

- To design suitable intake: intake is designed to ensure take water with avelocity < 0.2 m/s in order to not impact on moving and breeding of aquaticanimals at this area.

- To install screens to prevent aquatic organism into the intake.


Page 4-22

- Monitoring periodically to identify and have timely measures to restore theliving environment of aquatic animals.

4.1.2.2.2 Mitigating impact of redundant heat

Impact on human and environment due to redundant heat of the project isinsignificant. However, the project will intensify ventilation methods toimprove working conditions for worker.Ventilation and air-conditioning systems will be installed in offices, machinerooms and powerhouse to create appropriate working environment for human,equipments and machines.When designing the ventilation and air-conditioning systems, risk of fire isconsidered to mitigate damages on human and property.The ventilation system is installed in places without the air-conditioningsystem to ensure that temperature at site is not higher than environmenttemperature 10oC and always less than 35oC.The ventilation system can be have appropriate screens to stop dust.All areas with electric devices and electronic equipments will be attemperature of about 200C in all environmental conditions.All areas with continuous presence of worker, temperature will be keptbetween 200C and 250C.The ventilation and air-conditioning systems are designed according toaverage of maximum environmental conditions in the summer and minimumenvironmental conditions in the winter.Outdoor design conditions:- Temperature: 330C- Humidity: 80%Indoor design conditions:- Temperature at areas of turbines, auxiliary equipments, hydrogen

production (if any): is higher 50C than environment temperature.- Temperature at areas of main control, internal control, relay, office, electric

devices, etc. is 250C, its humidity is 80%.Ventilation and air-conditioning is necessary to ensure a best workingenvironment for workers, equipments and machines. Cost of investment andoperation is not high, so this measure is feasible and easy to do.

4.2 FOR ENVIRONMENTAL PROBLEMS

4.2.1 Measures of preventing and treating environmental problems in theconstruction phase

4.2.1.1 Risk of fire


Page 4-23

In order to mitigate risks of fire, the project will:- To arrange materials storehouses with barrier. To water during hot, dry,

windy conditions.- To always control and maintain equipments and machines to avoid oil

leakage.- Oil collected area is designed to collect total oil volume in case of risk- Emergency reaction alternatives and means shall be available in case of

occurred fireThere is a special report on fire. This report is agreed by fire police before theconstruction and operation periods. Hence, these measures are very feasible.However, for high efficiency, these measures need to combine with senseenhancement and education for worker.

4.2.1.2 Work accidents

In order to ensure safety for worker, the project will have safety regulations andlabor regulations. These regulations are disseminated and required to do forworker.- Before loading and unloading steel structures, it is necessary to check

carefully hook sites and ensure that cables are fully taut. To pay attention tosafety distance with electrical wire.

- When using hand-held devices which operated by electricity or compressedair, the workers do not stand at stairs for manipulation; they must stand atthe support for safety guarantee. With heavy devices, it is necessary to havea support or other safety guarantee devices.

- To conform strictly safety regulations on installation and operation ofelectrical devices. Installation workers are trained safety regulations ontransportation and installation of electrical devices.

- Transportation and installation of electrical devices will use specializeddevices to fasten; not use steel wire and chain cable to fasten insulatedcomponents and tangential points.

- Installing equipments at the top will conform safety regulations on safetyworking clothing and safety belt.

- Before connecting to electrical network and devices, it is necessary to stopall related works. Besides, all persons in distributing-room must get out ofdanger area.

- All construction equipments must be cut off the power in case of unuse,electrical problem, loss of the power from source in order to avoidaccidents.

- All steel equipments and structures will have earth connection system andbe connected to earth connection system of the plant, then it is necessary tomeasure some points for the control.


Page 4-24

- In case of fire due to electrical problems, first of all, it is necessary to cutoff the power, then conforming normal fire fighting process.

- To install notice boards at necessary sites (the substation site, tower site,...).

- To have specific staffs to control execution on safety regulations atconstruction site.

Above measures are feasible and efficient if they are entirely conformed. Butthey depend a lot on sense and execution of worker.

4.2.2 Measures of preventing and treating environmental problems in theoperation phase

4.2.2.1 Planning layout of the project

Prevention and solution of breakages are considered as soon as the project isplanned because they help to reduce the risk of breakage and create conditionsto solve easily breakages. Thence, they reduce impact on neighboring projectsto the minimum. Hence, the project will carry out measures as follows:- To study meteorological conditions of the project area in order to choose

sensible aspect for the power plant, and use natural ventilation condition ina best way to improve working environment inside the power plant;

- To arrange sensibly works of the power plant to ensure optimal ventilation,reduce pollution spread, prevent and fight fire and mitigate impacts due towaste on human and neighboring projects;

- Vegetation rate in the plant precinct is 15%. Surrounding area of the planthas a vegetation belt. This belt helps to improve climate, landscape andcreate industrial hygiene distance between Long Phu 1 power plant andneighboring plants;

- Production steps, auxiliary areas, storehouses and administrative buildingsare arranged sensibly to operate in optimality and safety, and solve timelyin case of happened problems.

- Gas emission system, chimney and areas of supply water and waste watertreatments are commodious to supervise and control easily.

- The project uses advanced technology of the world, so it reduces wastequantity.

- To operate exactly equipments and technology. Materials and fuel aredetermined amount in automation, so it is very exact owing to reduce wastequantity and stabilize component and quality of the waste in order to createadvantageous conditions to manage and treat the waste.

4.2.2.2 Preventing problems touch and shipwreck, bargewreck

For ensuring that the port is working normal and avoid the risk of unfortunatehappening, the transport ships go in and out the ports that must comply with


Page 4-25

strict regulations on the law of the sea traffic and ensure:- Do not carry overload.- Control ships to move in the regulation way.- Turn right the ship is true technique in the roadstead scope, when need to be

support by guided ship.- Regularly check and service headlight system, lights on the ship. Equip

available backup devices to timely replace when have problems- Regularly monitor the notices of Department of Sea route management to

know the changes in line flow regulation.- Regularly monitor hydrometeorology forecast to arrange suitable ship’s

schedules.- The port will arrange the floats of flow line and signal board, signal lights

in the roadsteads.

4.2.2.3 Controling the depression and erosion

To control the depression and erosion in the operation phase of the port andplant, measures below to apply:- Geological survey of the region in full and correct technical requirements

before construction.- The process of construction to comply with proper design and regulations,

technical process of construction.- Always check the technical elements of projects, along the sea walls of the

port ... and timely treatment problems that occur suddenly.- Close control of complying with regulations about the flow line, indicator

light, billboards and safety regulations in/out the port for all ships.

4.2.2.4 Preventing and rescuing the problem of oil spills

a. Measure to prevent the problem of oil spills: the impact caused by theproblem is very large, so necessary measures to prevent and rescueproblem with principles is the mainly prevention, the auxiliary rescue. Tocontrol this problems, the following measures are implemented:

- Construct management system and environmental protect in intervalwarehouse of the post.

- Always check out the vehicle from the tank to the jetty, the pipe system andopen/close valves in the jetty.

- Request to ships to the port that have to obey the norm of Shippingdepartment.

- Always practice for the situations that could lead to problems with oil spillsand fire periodically.

b. Measure the problem of oil spills:


Page 4-26

- Comply with Circular No.2262-TT/Mtg dated 29/12/1995 of Ministry ofScience, Technology and Environment guidance on overcoming theproblem of oil spills.

- For repairing the problem that use of measures of technical, organizedtraining, propagandize education and legislation.

c. The notice:- When detect problems to notice urgent to local government, Department of

Natural Resources and Environment of provinces.- Coordinate with relevant units such as prevention of fire, the police force,

local army, ... join to rescue problems.- In case of serious problem, have to notify to the Ministry of Natural

Resources and Environment, timely rescued measures.d. Steps to implement when the problem of oil spills happen:- Step 1: find all measures to rescue the people from the danger area.- Step 2: concentrate manpower, material and equipment to rescue.- Step 3: use the turn buoy to prevent oil spills, spreading to the surrounding

area.- Step 4: use pump to collect oil spills.- Step 5: oil film, oil sludge and materials with oil must be collect to one area

that be isolated with surround environment, and will be guide to treat byspecially agency.

4.2.2.5 Prevention of the breakage of storage tanks

- The storage tanks must be designed to meet the high safety standards,implemented by professional units and controlled by appropriate authoritiesbefore use.

- In the operation phase, the project will apply the suitable maintenanceregimes, periodically cleaning and discharging sediment of fuel oil in thetanks.

- In the use period, the oil storage tank will be checked periodically on safetyin order to detect timely the breakage and have appropriate methods.

4.2.2.6 Prevention of the breakage of oil pipelines

As above-mentioned analysis, the causes that can make the breakage of fueloil pipelines are pipe clog. Therefore, the project will:- The project will collaborate with the appropriate authorities to design and

install the pipeline system to meet the standards and issue the detailedoperation guides.

- All workers will be educated the awareness of safety regulations.- The project will have labor safety rules and control the conformation.


Page 4-27

- Before working, the pipeline system will be checked the pressure and safetylevel.

- In the working time, the workers have to be at the right position to timelydetect incidents and solve problems in the most suitable ways.

4.2.2.7 Prevention of evaporation and leakage in oil storage tank area

In order to reduce and solve overflow, evaporation and leakage of oil in the oilstorage tank area, the project will:- To build a dam surrounding the oil storage tank area. The volume of the

dam is 1.1 times compared to the volume of 2 tanks (please to see thedrawing of project layout).

- The tank must be designed correctly on technology; pipeline, pumps andvalves system have to operate at the designed capacity.

- To check regularly the stable operation of oil pump system, valves andinstalling the floats against evaporation inside of the tanks.

- To check regularly the tight-fitting level of pumps and pipeline systems.- To maintain regularly equipments and machines.- To installing water spraying system to cool the storage tanks in the hot

days.- The operation conforms to the regulations.

4.2.2.8 Prevention of fire

Safety on fire of the power plant is very important. In order to reduce damageson man and property in case of fire, these measures will be applied:- To design a fire fighting system that is agreed by the fire police before

construction and operation of the power plant.- To arrange the oil storage tanks in blank place with over 50m far from the

power plant. To build a wall surrounding the tank to prevent fire and reduceaffected area in case of fire.

- All electric equipments must be calculated with the reasonable cablesections, and have protection equipments for overloading. Places having hightemperature, cable lines must be conducted underground or be protected. Allmachines must be connected to the ground to ensure the ground touchingresistance below 2 m.

- Machines and equipments must have the curriculum vitae enclosed and bemeasured, watched frequently for the technical parameters.

- To install good fire alarm system and flash lights.- Workers must be trained and practiced accurately tasks in case of happened

problems, and always be present at the positions of themselves in order tomanipulate and check correctly.


Page 4-28

- To repair periodically machines and equipments. In case of happenedproblems, workers must be guided and solved according to the safetyregulations.

4.2.2.9 Preventing breaking problem of dike of ash disposal area

- Have a full geological survey of the project area.- Design and build dike of the ash disposal area according to technology.- Monitoring and timely detection of cracks to have measures for repair and

prevention of dike breaking.

4.2.2.10 Earth connection system

Earth connection system is a net grid made by wires (or bars) to be grounded andearthed stakes which are connected together with each gap is not over 6m, shouldbe fixed 0.8m in depth in the ground. The material of this net may be copper orzinc-plated steel.The parameters of the earth connection system will be defined on basis ofcalculations of thermo-mechanics durability, contact voltage, step voltage inIEEE 80-1986 and earth value of system is not more than 0.5 in VietnameseNorms. Safe and worked earth connections are associated in one system of earthconnection of the plant.

4.2.2.11 Lightning prevention system

The lightning rod and lightning prevention wires system will protect buildingsand equipments. The layout and size of this system is calculated to achieve thescope of protection needed and other requirements of the plant. The scale andlayout of this system will be calculated to protect all plants, 500 kV substation, oilstorage tanks, chimney, …The vans for lightning prevention will be installed to create 03 phase of thetransmission line in the air, the 220 KV and the transformers to protectspreading of lightning prevention.The lightning prevention system will be combined with the earth connectionsystem.These measures are based on operation of existing power plants, so they arefeasible and high efficient. The efficiency of these measures depends on abidancesense of the concerned people.

4.2.2.12 Prevention of problems of waste water treatment system

Problems of waste water treatment system occur due to breakdowns of pump,air compressor, measuring devices. Hence, in order to prevent and repair thesebreakdowns, the project will install parallel two systems of pump, aircompressor, measuring devices so that they operate in shifts to createadvantageous conditions for repairing, maintenance and operation in case of


Page 4-29

happened breakdowns.

4.2.2.13 Safety and hygiene at work

To monitor microclimate elements twice a year together with environmentalsupervision. The plant will conform to environmental standard on workplaceof Ministry of Public Health.The plant needs to have a medical periodically to detect timely diseases(including occupational diseases).Workers and staffs working at places with high noise level will be equippedsafety clothing and other safety equipments (including noise-killer). Workersand staffs working at places with high and medium voltage lines and risk ofelectric shock will be equipped specialized equipments such as clothing, shoe,glove and helmet.Educating and checking periodically safety techniques.


Page 5-1

CH NG 5CHAPTER 5: ENVIRONMENTAL MONITORING AND

MANAGEMENT PLAN

5.1 ENVIRONMENTAL MANAGEMENT PLAN

5.1.1 Organization structure

Long Phu 1 thermal power project management board is project owner andtake charge of executing mitigation methods (mentioned in chapter 4), andguarantees that regulations and standards of Viet Nam law are executed inconstruction and operation processes.

Table 5-1 Organization structure

Vai trò Trách nhi m T ch c

Project owner • Highest responsibility is taken to project and environmentmanagement

• Constructing and executing environment protectingcontracts in managing and monitoring environment.

Long Phu –Song HauPetro-PowerProjectManagementBoard

Development,operation andmanagementinstition

Detail development responsibility consist of:

• Planing and managing project

• Operating include environmental managementprogramme, monitoring in operation phase.

• Distributing partners on environmental managementaspect

• Organizing environmental monitoring

• Give budget for observation action.

• Reporting on environment information

Long Phu –Song HauPetro-PowerProjectManagementBoard

Consulting • Taking charge of report of EIA, executing consultation PECC3

Monitoringcontractor

• Taking charge of monitoring institution that constructdirectly, execute protecting environment, includingenvironment management and monitoring

Monitoringinstitution ischosen byinvestor

Contractor • Taking charge of constructing and complying regulationsfor them in management and monitoring project

i. Applying mitigation methods in construction

ii. Guaranting safe for employee and lacal residentialin construction

iii. Complying law, policy of state on environmentprotection in construction

Contractor ischosen byProject owner


Page 5-2

5.1.2 Established specialized department of environmental protection at PMBand Long Phu 1 thermal power project

Department on environment (environmental group/environmental department,etc.) will be established in PMB and management units of Long Phu 1 TPP.This department will be organized, tracking and monitoring all activitiesrelated to environmental protection during construction and operation of LongPhu 1 TPP.Department expert on the environment will perform the following:- Organize, track, checking the implementation of measures to reduce

pollution during the construction and operation;- Cooperate with environmental pollution monitoring specialized unit during

construction and operation;- Write a environment monitoring report during construction and operation,

submitted to Soc Trang province Department of Environment & Resources,and perform other activities related to environment.

5.1.3 Environmental management and reporting system

In the construction phase, PMB will assign staffs in charge of environmentalmanagement activities. These staffs will organize, supervise and control thecontractors on monitoring and implementation of environmental protectionmeasures. These staffs will also report periodically to competent levels (pleaseto see table 5.2).In the operation phase, environmental department will assign a unit or somestaffs in charge of environmental management activities. The most importantfunction of them is organization, supervision and monitor of environmentalpollution control systems, especially exhaust gas and cooling water. They willreport periodically to competent levels (please to see table 5.2).The power plant will combine with Department of Resources andEnvironment in environmental management. By means of close coordinationbetween operation teams and authorities will be positive influence onenvironmental protection and socio-economic development.


Page 5-3

Table 5-2 Environmental reporting system

PRIMARY REPORTING LEVEL SECONDARY REPORTING LEVELREPORT

TYPE Prepared by Submittedby

Frequency Preparedby

Submittedby

Frequency

Environmentalperformancemonitoring:construction

Environmentaldepartment ofPMB

PMB 6months/time PMB

Soc TrangprovinceDONRE

6months/time

Environmentalperformancemonitoring:operation

Environmentaldepartment ofthe plant

Long Phu 1TPP

1month/timein the firstoperationyear3months/timefrom thirdoperationyear

Long Phu 1TPP

Soc TrangprovinceDONRE

1month/timein the firstoperationyear3months/timefrom thirdoperationyear

5.1.4 Training and capacity improvement of environmental management forofficials and operation workers

During the construction and operation phases, PMB and operationmanagement unit will organize short training programs on theory and practiceof environmental protection activities. Training cost is included in investmentcost of the project (for the construction phase) or operation cost of the project.Training cost is shown in below table:

Table 5-3Cost of capacity improvement program for safety andenvironmental protection

Type of training Contents Cost Total (VND)

Construction phase

Number of trainees: 05persons

05 persons x 7 days x100,000 VND/day 3,500,000

Hiring consultant expert 01 person 5,000,0001Training forenvironmental staffs ofthe PMB and contracts

Cost of the course 3,000,000VND/course 3,000,000

Operation phase

Number of trainees: 10persons

10 persons x 7 days x100,000 VND/day 7,000,000

Expert employing 01 person 5,000,0001

Training fortechnicians andenvironmental staffs ofthe plant Other cost (classroom,

teaching instrument, etc.) A course 3,000,000

2 Tour to get experienceon environmentalprotection

Number of trainee: 05persons

05 persons x 2 days x300,000 /day 3,000,000

Total 29,500,000


Page 5-4

5.1.5 Enironmental management plan

Environmental management plan is shown in below table:


Page 5-5

Table 5-4 Environmental management plan


Objects ofimpacts Impact assessment Mitigation measures Responsibility Supervision

organization

Airenvironment

Noise, dust and exhaust gas from vehicles, machinesand equipments.

- Transportation of devices, materials andheavy equipments must use specializedvehicles. Transport vehicles must be checkedbefore use. Strings and ropes must be firm andsafe. Transportation needs to conform tosafety regulations.

- To adjust vehicle density on the roads in orderto reduce affects on the traffic in the area.

- To salvage existing river traffic.

- To monitor air environment in constructionsite and surrounding areas with parameterssuch as dust, SO2, NO2, CO, hydrocacbon.

ContractorsPMB

PMB/DoNRE/

local government


Waterenvironment

Leakage oil and eliminated oil from vehicles andmachines can cause surface water pollution, inparticularly rainy season.

- To collect and discharge oil sludge accordingto regulations.

Contractors PMB/DoNRE/

local government

Airenvironment

Reek caused by dredging is from mud containingCO2, H2S, CH4, etc.

Port construction need to be consolidated pilefoundation. A large number of pile foundations willbe drove in river, so noise and vibration caused by theactivities is considerable (more than 110dBA).

- Dredging process is done in a short time.

- All construction activities are carried out indaytime and earlier 10pm.


local government

Soilenvironment

Quantity of dredging mud is about 500,000m3.

Leakage oil and eliminated oil from vehicles andmachines can cause pollution of soil environment

- Dreging mud is used to aggrade other areas.


Contractors/PMB

PMB/DoNRE/

local government

1.2 River beddredging andportconstruction

Waterenvironment

River bed dredging in large scale will impact on riverwater quality as: increase in turbidity andaccumulated matters.

- Dreging mud is used to aggrade other areas.

- To control closely dredging process.


local government


Page 5-6



organization

Airenvironment

Construction activities will cause noise and dustwhich impact on air quanlity of the project area.

- To build barriers in the project area since thebeginning of the construction phase in orderto reduce noise and dust from the project intosurrounding area

- To equip noise-killer (stopper for ear) forconstruction workers when they work atplaces with high noise level.

- To use methods and equipments with lownoise and vibration levels.

- To monitor air environment in constructionsite.


local government

Water and soilenvironments,aquatic life

At construction site, excavation, concrete mixing, …rain water sweep away sand, stone, constructionwaste into adjacent streams. This increases turbidity,water pollution, soil erosion and sedimentation indownstream, and impact on aquatic ecosystem.

Leakage and residual oil from machines andequipments can cause soil and water pollutions, ifthey are not collected and disposed in appropriateplaces.

- Not discard solid waste (constructed waste,sand, stone, etc.) and sludge oil of constructedmachine into water source. All waste must becollected and transferred to waste treatmentplace according to regulations of the local.

- Not create ponds, pools in construction areasto prevent water contamination and growth offly, mosquito and mouse in order to protecthealth of local people.

- To arrange storehouses of materials in safesites. To avoid oil overflow and have timelyemergency measures in case of happened riskduring the construction period in order to limitpollution of surface water and undergroundwater.



local government

1.3 Constructionworks of theproject

Naturallandscape

Construction waste is mainly soil, stone, scrap iron,cement bag and scrap timber. If they are not disposedin appropriate place, they will impact on natural

- Collection at site.

- Having barrier in construction sites.

- Restoring landscape after finished


local government


Page 5-7



organizationlandscape of the area. construction

Water and soilenvironments,naturallandscape andpublic health

Domestic solid waste from 1,000 workers atconstruction sites which is not collected and disposedin appropriate places, will impact on naturallandscape of the area and cause soil and waterenvironments (water leaks out from dumpinggrounds, be carrier of a disease and difficult to treat).

Average volume of domestic wastewater is estimatedby 80% water supply water consumption (about120liters/day/person). This waste water can causewater pollution if it is not treated appropriately.

Domestic waste water contains a lot of microbes, incase of discharging directly to the environment (HauRiver), it will spread diseases to inhabitants usingwater in downstream.

- Domestic solid waste in the constructionperiod will be collected daily and disposed ata landfill (near the ash disposal area). Theproject will contract with Urban EnvironmentCompany of Soc Trang city to treat thisdomestic solid waste. Every week, the UrbanEnvironment Company of Soc Trang city willcollect and transport them to an appropriatesanitation treatment place.

- To arrange outhouses with septic tank forconstruction workers in construction sites.

Contractors/PMB

PMB/DoNRE/

local government

1.4 Workersconcentration

Culture,socio-economy ofthe locality

Labour from other areas will disorder traditionallifestyle of indigenous inhabitants, increase the risk ofhappening contradictions between constructionworkers and local inhabitants. This will also increasethe risk of occurring unofficial relations betweenlocal women and workers.

Building construction camps will lead to appearshops and inns, and other entertainment services. Thisis also risk of arising social evils.

- Use and train local labours.

- To have discipline for all workers, includingtemporary workers.

- The project will inform and combine withlocal authorities to manage all employees ofthe project in order to avoid social evils andmitigate conflicts between workers and localinhabitants

Contractors/PMB

PMB/DoNRE/

local government



Leakage oil and fuel can cause fire and explosion.However, the risk is very small because functionalpartitions will be planned separately and there arespecific preventive measures.

Work and traffic accident may occur, howeverexperienced contractors will have mitigationmeasures to limit these risks.

- To arrange materials storehouses with barrier.To water during hot, dry, windy conditions.

- To always control and maintain equipmentsand machines to avoid oil leakage.

- Emergency reaction alternatives and meansshall be available in case of occurred fire

- Have safety regulations and labor regulations.

Contractors/PMB

PMB/DoNRE/

local government


Page 5-8



organizationThese regulations are disseminated andrequired to do for workers.

Surface water In operation phase, the power plant will use waterfrom Hau River for cooling. Flow of cooling water isinconsiderable in comparison with average flow ofHau River.

Aquaticproductresources

Shrimp, fish species, etc. will be entrained intocooling water flow at intake area causes losses ofamount of aquatic creatures. However, these lossesare insignificant.

- To design suitable intake: intake is designedto ensure take water with a velocity < 0.2 m/sin order to not impact on moving and breedingof aquatic animals at this area.

PMB DoNRE/local government

2.1 Using waterfor cooling


Causes disorder of river flow and river bed erosion.However, these impacts are insignificant.

- - -

Waterenvironment

There is residual chlorine in cooling water but lowerthan Vietnamese Standard and automaticallymonitored. So, this impact is insignificant.

- Chlorine adding process is operatedautomatically in order to control Chlorineconcentration in water so as to not overpermitted volume. With this method, Chlorineconcentration in cooling water at outlet willmeet the Vietnamese Standard 5945:2005,type A.



Difference between inlet and outlet of cooling watersystem is about 7 - 8oC. Cooling water temperature ishigher than received seawater could cause to reducedissolved oxygen content which impacts on aquaticlife in this area but scope of influence is insignificant.

- - -



Causes disorder of river flow and river bed erosion.However, these impacts are insignificant.

- - -

2.3 Exhaustemission

Airenvironment

Exhaust gas with NOx, SO2, dust and CO by fuelcombustion will impact on air quanlity. Calculationresults from emulation of emission of polluted air by

- Installing dust and sulfur removal systems(with the efficiency are 99% and 85%respectively)



Page 5-9



organizationatmospheric dispersion model was also demonstratedthat these content of polluted air meet VietnameseStandard. So, impacts of exhaust emission areinsignificant.

- Monitoring exhaust gas of the power plantand ambient air quality

Airenvironment

Coal reception, transportation and storage will emitdust which impacts on ambient air quanlity.

- Using specialized ships to transport coal to theplant area.

- Using closed conveyor to transport coal to thestorehouses.

- Frequently cleaning conveyor.

- Periodically maintaining conveyor and otherspecialized equipments.

- Putting correctly the quantities of coal toavoid storage overloading.

- Spraying water to reduce dust in outdoorstoragehouse.

- Installing wind field fence in order to reducediffusion of dust.

- Monitoring air quality in around storagehousearea.


2.4 Coal pick-up,transportationand storage

Waterenvironment

Spraying water to limit dust in coal storage andwashing coal belt will cause wastewater which willimpact on surface water if it is not collected andtreated appropriately.

- Waste water from coal storage and washingcoal belt will be treated meeting the standardbefore discharge to the environment.


2.5 Ash collectionand discharge

Airenvironment

Dust caused by transportation of fly ash (dry ash willbe consumed by cement factories) and ashexploitation activities of local people in the ash pond.

- Using specialized trucks or specialized bargesto transport coal residue, using closedconveyor to transport coal residue (in case ofcoal residue used as additive substance forcement production).

- Having management measures in residuedisposal area, and forbiding residue



Page 5-10



organizationexploitation activities of local people.

- Planting trees within and around the plant.

Waterenvironment

Domestic wastewater from activities of workers willbe collected and treated to meet Vietnamese Standardbefore discharge in order to ensure not to causepollution of water resource.

- Domestic wastewater from activities ofworkers will be collected and treated to meetVietnamese Standard before discharge


2.6 Activities ofoperationworkers

Soilenvironment

Domestic solid waste will be collected disposed atappropriate places in order to ensure not to causepollution of soil environment.

- All places in the power plant are equippedwaste baskets to collect and classify the wasteat the sources.

- Recyclable wastes such as discarded paper,carton, plastic, wood, etc. will be collectedand sold to waste-recycling units.

- Biodegradable organic wastes such as leaf,food residue, etc. will be collected daily anddisposed at a landfill (near the ash disposalarea). The project will contract with UrbanEnvironment Company of Soc Trang city totreat this domestic solid waste. Every week,the Urban Environment Company of SocTrang city will collect and transport them toan appropriate sanitation treatment place.


2.7 Productionwastedischarge


Production waste consists of ash, solid residue fromboiler washing and wastewater treatment system,grease, etc. They will cause seriously pollution if theyare not collected and treated appropriately.

- Ash will be supplied directly as additive forcement under dry form. In case ash is notconsumed, ash will be transported to the ashdisposal area and mixed with water to formash pond.

- Gypsum has been separated water, can bebread and supplying to manufactory thatproduct building material or transferred to thecinder yard of the plants.

- The residue from washing he boiler will becollected whenever the washing. It is



Page 5-11



organizationcontained in tanks with cap and transferred toa sanitary landfill by appropriate units.

- The sludge from water treatment process istransferred to the drying ground to create drysludge, then, it is used to backfill atappropriate places or transferred to the ashdisposal area.

2.8 Residual heat Airenvironment

Residual heat from operation will impact on ambientair temperature. But this impact considered isinsignificant.

- Ventilation and air-conditioning systems willbe installed in offices, machine rooms andpowerhouse to create appropriate workingenvironment for human, equipments andmachines.


Airenvironment

Activities of loading machines, carriers, cargo barge,etc. are sources of noise and vibration.

Coal and equipment unloading could cause dustimpacts on air quality.

- Planting trees and vegetal carpets.

- Using the specialized vehicles to spray waterfrequently twice a day at 11 o’clock and 14o’clock.

- Using closed conveyor to transport coal to thestorehouse to reduce dust pollution inside theports and the plant area.

- Frequently cleaning the port area, conveyor...and collect scattering materials.

- Harmonizing reasonable density of ships,barges on the port.

- Using equipments, machines, ships, bargeswith high quality, saving energy, andmaintaining periodically.

- Monitoring air quality in the port area.


2.9 Activities ofreceiving port

Water and soilenvironment

Waste oil from equipment and machines will bepollution sources for water and soil environment inport area if it is not controlled strictly.




Page 5-12



organization

2.10 Oil spill, oilpipe systembreakdownaccident


Oil spill, oil pipe system breakdown accident arepotential risk, but not serious.

- Having measures to prevent and resolve theproblem of oil spills and

- The storage tanks must be designed to meetthe high safety standards, implemented byprofessional units and controlled byappropriate authorities before use.

- In the operation phase, the project will applythe suitable maintenance regimes, periodicallycleaning and discharging sediment of fuel oilin the tanks.

- In the use period, the oil storage tank will bechecked periodically on safety in order todetect timely the breakage and haveappropriate methods.


2.11 Fire Operationworkers,people in theproject site

Fire and explosion accident could occur in DO tanksand coal storage areas. However, application ofmorden technical and technological measures andseriously implementing regulations and operationprocedures as well as regularly monitoring andmaintaining as stipulated will minimize theseimpacts.

- To design a fire fighting system that is agreedby the fire police before construction andoperation of the power plant.

- To arrange the oil storage tanks in blank placewith over 50m far from the power plant. Tobuild a wall surrounding the tank to preventfire and reduce affected area in case of fire.

- Machines and equipments must have thecurriculum vitae enclosed and be measured,watched frequently for the technicalparameters.

- To install good fire alarm system and flashlights.

- Workers must be trained and practicedaccurately tasks in case of happenedproblems, and always be present at thepositions of themselves in order to manipulateand check correctly.



Page 5-13



organization

- To repair periodically machines andequipments. In case of happened problems,workers must be guided and solved accordingto the safety regulations.

2.12 Accident atwork


While operation, maintenance, amendment ofmachine, labour accidents may occur if workers donot execute safety regulations seriously.

- The plant needs to have a medical periodicallyto detect timely diseases (includingoccupational diseases).

- Workers and staffs working at places withhigh noise level will be equipped safetyclothing and other safety equipments(including noise-killer). Workers and staffsworking at places with high and mediumvoltage lines and risk of electric shock will beequipped specialized equipments such asclothing, shoe, glove and helmet.

- Educating and checking periodically safetytechniques.



Page 5-14

5.2 ENVIRONMENTAL MONITORING PLAN

In the construction phase, requirements of contents on mitigation measuresand environmental quality monitoring will be mentioned in contract withconstruction contractors. The PMB will assign some staffs to superviseenvironmental protection performance and environmental monitoring of thecontractors. Besides, PMB will combine with specialized agencies to executeenvironmental monitoring program in the construction phase and assess theefficiency of mitigation measures.In the operation phase, PMB will be in collaboration specialized agencies toperform environmental monitoring plan in order to monitor impacts onenvironment and assess efficiency of environmental treatment and mitigationmeasures.

5.2.1 Monitoring waste

5.2.1.1 Objects, parameters and frequency

Table 5-5 Monitoring waste

No. Parameters Monitoringlocation Devices

Numberof

sampleFrequency

A CONSTRUCTION PHASE

B OPERATION PHASE

B.1 Exhaust gas of the plant

- CO- SO2

- NOx

- Total dust(TSP)- To

- Stack system - Exhaust gas measurement andmonitoring system (Ozsat) (*)

continuously(period 1-24hours)

B.2 Waste water from main waste water treatment system

- pH

- Turbinity

- BOD5

- COD

- Oil

- To

- Coliforms

- - Input and outputsites of main wastewater treatmentsystem

(monitoringpositions shown infigure 6-1)

- pH meter with glass electrode

- Turbidity meter

- Oxygen is dissolved after 5 days at200C

- Oxidation by K2Cr2O7

- Gas chromatography (Vietnamesestandars 5070:1995)

- Thermometer

- To filter by membrane and grow at430C

02 3months/time

B.3 Cooling waste water


Page 5-15


Numberof

sampleFrequency

- pH

- To

- Cooling wastewater dischargecanal


- Thermometer

01 1 day/timein first

operationmonth

Notes:(*) For exhaust gas of the plant, because of exhaust gas feature and stackheight, the plant will install a exhaust gas measurement and monitoring system(Ozsat) as:- General:

⋅ Supervision system is capable working condition at site and haveselectable period from 1 to 24 hours and be able to self-diagnosis.

⋅ Equipment must synchronize with each other, includingsupervision/sampling devices, detecting heads, power sources, dataprocessing devices, filters, fans to feed non-dust air to supervisiondevices.

⋅ Output signal of supervision device is DC current 4-24mA for DCS. Theamplitude is proportional to smoke concentration.

⋅ Supervision shall display the gas concentration on a LCD or a normalscreen which is based on a microprocessor and automaticallystandardizes zero point.

- NOx/SO2 monitor:

⋅ The plant shall be provided instrumentation to measure and monitorSO2, NO and NO2 concentration. Measured concentration of gas shall becompensated for different working conditions and the absorptioncharacteristics of elements of smoke, for example steam. Supervisorsshall synchronize with gas-standardized cylinder, regulator and shall beplaced at the inlet of smoke path to stack, behind smoke fan.

- CO/CO2 monitor:

⋅ Instruments that are used for supervising CO and CO2 shall includeinfrared analysis (sender and receiver). Gas concentration measuredshall be compensated for different working conditions and for theabsorption characteristics of other elements in smoke such as steam.Equipment shall be placed at a place that can be easily accessed on thepath to stack.

- Dust concentration monitor

⋅ Equipment to measure dust concentration is a monitor that be able tomeasure the fogginess of flue gas due to soot and dust. Dustconcentration shall be compensated for different temperature mode andthe absorption characteristics of smoke, such as team.

N

KT : AIR SAMPLING POINT

Figure 5-1:SAMPLING LOCATION

NOTES:

NT : WASTEWATER SAMPLING POINT

NTLM : COOLING WASTEWATER SAMPLING POINT


Page 5-16

⋅ Three dust-concentration supervisors shall be provided and installed.One is placed smoke inlet of each precipitator and one on the commonoutlet of precipitators.

5.2.1.2 Monitoring locations

Sampling positions of monitoring waste are shown in figure 5-1.In which:- KT 1: 9o42’43,31”N – 106o5’6,59”E.- NT 1: 9o42’38,07”N – 106o5’4,59”E.- NT 2: 9o42’37,58”N – 106o5’5,38”E.- NTLM 1: 9o42’11,34”N – 106o5’9,53”E.

5.2.1.3 Standards in comparison

- Standards of exhaust gas: Vietnamese Standards such as 5939:2005, and7440:2005 applied together with the decision No.07/2005/QD-BTNMT.

- Standard of industrial waste water quality: Vietnamese Standard 5945:2005, class A.

5.2.2 Monitoring ambient environment

5.2.2.1 Objects, parameters and frequency

Table 5-6 Monitoring ambient environment


Numberof

sampleFrequency

A CONSTRUCTION PHASE

A.1 Ambient air environment

- Total dust(TSP)

- SO2

- NOx

- CO

-Hydrocacbon

- Noise

- Construction site(concrete mixingstation) (02positions)

- Road for materialtransportation

- Aroundresidential area (02positions)

- Sampling device: DESAGE GS 312(1hr.); analysis method: Griss-Saltmanaccording to ISO 6768/1995

- To measure amount according toVietnamese standard 5067: 1995

- Integral noise meter

05 6 months/time in

constructionphase

A.2 Underground water

- pH- SS- Fe- As- NH3

Underground waterin housholds inaround residentialarea (02 samples)

- pH meter with glass electrode- To measure amount according toVietnamese standard 5067: 1995- Atomic absorption spectrophotometry- Ultraviolet/ visible spectrophotometry

02 6 months/time in

constructionphase


Page 5-17


Numberof

sampleFrequency

- NO3

- NO2

- Coliforms


A.3 Surface water

- pH- Turbinity- BOD5

- COD- Oial- Coliforms

River water inaround project area(02 samples)

- pH meter with glass electrode- Turbidity meter- Oxygen is dissolved after 5 days at200C- To oxidate by K2Cr2O7

- Gas chromatography (Vietnamesestandars 5070:1995)- To filter by membrane and grow at430C

02 6months/time

inconstruction

phase

B OPERATION PHASE

B.1 Ambient air environment

- CO- SO2

- NOx

- TSP- VOC- To

- Humidity- Noise

- DO storage- Boiler area- Stack base area- Plant precinct atwind direction- Port area- Coal storage area- Outlet of coolingwaste water- Residential aresat wind direction (5points)

- Sampling device: DESAGE GS 312(1hr.); analysis method: Griss-Saltmanaccording to ISO 6768/1995


- Thermometer

- Humidity meter- Integral noise meter

12 1 month/time in thefirstoperationyear

3 months/time fromthe secondoperationyear

B.2 Underground water

- pH

- SS

- Fe

- As

- NH3

- NO3

- NO2

- Coliforms

Underground waterin housholds inaround residentialarea (03 samples)




- Atomic absorption spectrophotometry

- Ultraviolet/ visible spectrophotometry


03 6 months/time

B.3 Surface water

- pH

- Turbinity

- BOD5

- COD

- Cooling wastewater intake canal

- Cooling wastewater dischargecanal


- Turbidity meter

- Oxygen is dissolved after 5 days at200C

- To oxidate by K2Cr2O7

05 3 months/time


Page 5-18


Numberof

sampleFrequency

- Oil

- To

- Coliforms

- Position 100m farfrom cooling wastewater outlet

- Surface water inHau river (2samples)


- Gas chromatography (Vietnamesestandars 5070:1995)

- Thermometer


5.2.2.2 Monitoring locations

Sampling positions of monitoring embient environment in construction phaseare shown in figure 5-2. In which:- KK 1: 9o42’28,94”N – 106o4’57,98”E.- KK 2: 9o42’8,10”N – 106o5’8,95”E.- KK 3: 9o42’22,74”N – 106o5’6,51”E.- KK 4: 9o41’23,11”N – 106o4’57,59”E.- KK 5: 9o43’39,66”N – 106o4’38,57”E.- NM 1: 9o43’46,6”N – 106o4’41,4”E.- NM 2: 9o42’26,62”N – 106o4’45,99”E.- NN 1: 9o43’0,48”N – 106o4’28,18”E.- NN 2: 9o43’34,25”N – 106o4’40,20”E.Sampling positions of monitoring embient environment in operation phase areshown in figure 5-3a,b. In which:- KK 1: 9o42’42,76”N – 106o5’30,39”E.- KK 2: 9o42’38,63”N – 106o4’59,39”E.- KK 3: 9o42’43,31”N – 106o5’6,59”E.- KK 4: 9o42’38,62”N – 106o5’6,53”E.- KK 5: 9o42’32,07”N – 106o5’22,79”E.- KK 6: 9o42’26,41”N – 106o5’8,51”E.- KK 7: 9o42’6,26”N – 106o5’31,02”E.- KK 8: 9o44’57,66”N – 106o7’56,79”E.- KK 9: 9o43’55,03”N – 106o5’59,37”E.- KK 10: 9o42’45,29”N – 106o7’0,11”E.- KK 11: 9o42’24,70”N – 106o2’55,04”E.- KK 12: 9o40’20,15”N – 106o2’43,94”E.


Page 5-19

- NM 1: 9o43’46,6”N – 106o4’41,4”E.- NM 2: 9o42’40,4”N – 106o5’18,6”E.- NM 3: 9o42’9,56”N – 106o5’40,23”E.- NM 4: 9o42’11,34”N – 106o5’9,53”E.- NM 5: 9o42’47,86”N – 106o5’8,12”E.- NN 1: 9o43’0,48”N – 106o4’28,18”E.- NN 2: 9o43’34,25”N – 106o4’40,20”E.- NN 3: 9o43’58,79”N – 106o4’20,97”E.

N

KK : SAMPLING AIR LOCATION

Figure 5-2: SAMPLING LOCATION

NOTICE :

NN : SAMPLING UNDERGROUND WATER LOCATION

NM : SAMPLING SURFACE WATER LOCATION

MONITORING SURROUNDINGCONSTRUCTION PERIOD

KK 1

KK 2

KK 3

KK 4

N

KK : SAMPLING AIR LOCATION

FIGURE 5-3a: SAMPLING LOCATION

NOTICE :

NM : SAMPLING UNDERGROUND WATER LOCATION

NM : SAMPLING SURFACE WATER LOCATION

MONITORING SURROUNDINGOPERATION PERIOD


Page 5-20

Figure 5-3b Sampling positions of monitoring embient environment inoperation phase

5.2.2.3 Standards in comparison

- Standards of ambient air: Vietnamese Standards such as 5937:2005, 5938:2005, 6438:2001, 5948:1995, 5949:1998.

- National technical regulation on underground water quality: QCVN09:2008/BTNMT.

- National technical regulation on surface water quality: QCVN08:2008/BTNMT.


Page 5-21

5.2.3 Other monitoring

5.2.3.1 In construction phase

- Collection and treatment of waste types in construction site (frequency of 3months/time).

- Hygiene and safety of employees in construction site (frequency of 3months/time).

- Depression and erosion in construction site (frequency of 6 months/time).

5.2.3.2 In operation phase

Soil quality monitoring:Monitoring parameters: heavy metal, N, P, Ca, pH.Monitoring positions: inside plant, residue disposal area, residential areaaround the plant, port area, conveyor and coal storage.Number of sample: 05 samplesFrequency: 6 months/timeElectric field monitoring:Electric field will be monitored in the operation phase of the project.Monitoring positions: generator area, substation area, nearest residential area(2 samples).Number of sample: 04 samplesFrequency: 1 year/time.

Other monitorings:- Monitoring annual health for employees (1year/time).- Statistic of rate of respiration, metronidazole dissease.- Usually watch for maintenance equipments of plant.- The economic and social local annual (1 year / time).- Regularly check and try to operate alarm system problems and

automatically stop the system to ensure they can work when there is aproblem.

- Regularly check and try to operate the system automatically reports the firedrill and response activities of the problem.

- Moitoring regularly operation of the port.- Monitoring periodically quality and performance of treatment systems of

exhaust gas and waste water. Timely detect problems and fixing problems.

5.2.4 Estimated cost of environmental monitoring


Page 5-22

5.2.4.1 In construction phase

Cost of sampling and analysis:- Air quality:

05 samples/time x 300,000VND x 2 times/year = 3,000,000VND/year- Surface water quality:

02 samples/time x 500,000VND x 2 times/year = 2,000,000VND/year- Underground water quality:

02 samples/time x 400,000VND x 2times/year = 1,600,000VND/yearCost of other monitorings = 5,000,000VND/yearCost of setting up and appraising the environmental monitoring report =10,000,000VND/yearTotal cost of environmental monitoring in construction phase:21,600,000 /year (included in investment cost).

5.2.4.2 In operation phase

Cost of sampling and analysis:- Exhaust gas of the plant (exhaust gas measurement and monitoring system

–Ozsat is invested in construction phase)- Ambient air:

In the first operation year: 144 samples/year x 300,000VND =43,200,000VND/yearFrom the second operation year: 48 samples/year x 300,000VND =14,400,000VND/year

- Underground water: 06 samples/year x 400,000VND = 2,400,000VND/year- Surface water: 20 samples/year x 500,000VND = 10,000,000VND/year- Waste water: 8 samples/year x 500,000VND = 4,000,000VND/year- Cooling waste water: 01 sample/day x 50,000VND x 30 days =

1,500,000VND/year- Soil: 10 samples/year x 700,000VND = 7,000,000VND/year- Electric field: 04 samples/year x 500,000VND = 2,000,000VND/yearCost of other monitorings = 10,000,000VND/yearCost of setting up and appraising the environmental monitoring report =20,000,000VND/yearTotal cost of environmental monitoring in operation phase:

- 100,100,000VND/year for the first operation year.- 71,300,000VND/year from the second operation year.


Page 5-23

In case of funding project, there will be other costs of independent monitoringin construction and operation phases, allowances, compensation for lossesonaquatic organism and fish … shall be considered and supported that basing onagreement of investor and funder.

5.3 LIST OF ENVIRONMENTAL TREATMENT WORKS, COST ANDSCHEDULE

Table 5-7 List of environmental treatment works, cost and schedule

No. ItemsCost

(USD)Construction

beginConstruction

finish

A Construction phase

1 Outhouse system in construction siteIncluded in

construction cost

2010(beginning

construction)

03/2010

2 Solid waste dump in construction site - - -

B Operation phase

1 Ventilation and air conditioning system 1,307,320 2010(in

constructionphase)

2013(before

operation)

2 Fresh water treatment system 4,000,000 2010(in

constructionphase)

2013(before

operation)

3 Waste water treatment system 2,000,000 2012(in

constructionphase)

2013(before

operation)

4 Exhaust gas treatment system (ESP andFGD)

60,000,000 2012(in

constructionphase)

2013(before

operation)

5 Environmental monitoring system 50,000 2012(in

constructionphase)

2013(before

operation)

6 Exhaust gas dispersion system and stacksystem

10,905,274 2012(in

constructionphase)

2013(before

operation)

7 Solid waste dump - - -


Page 6-1

CH NG 6CHAPTER 6: PUBLIC CONSULTATION

According to instruct of Decree No.80/2006/ND-CP date 9/8/2006 ofGovernment about guiding details of article of Law of environmentalprotection, Investor’s (the former is No.3 thermal plant manage board) officialdispatch No 0150/CV-AND3-KTGS date 29/01/2008 about “Suggestionsabout implement Long Phu 1 thermal plant project” (enclosure EIA summaryreport of Long Phu 1 thermal plant) inside, highlight impact of project area,environment impact and socio-economic, measures to minimize and someother terms had been sent to Long Duc commune and received comment ofPeople’s committee and Fatherland Front committee.

6.1 COMMENTS OF COMMUNE PEOPLE’S COMMITTEE

Advice to environment matters of Long Phu 1 thermal plant project of LongDuc commune People’s committee, Long Phu district, Soc Trang province,according official dispatch No 011/UBND date 15/02/2008 (enclosed inappendix 1) collected and classify:- Long Duc commune People’s committee researched EIA’s summary report

of project and agreed with report;- Propose Investor implement measures to minimize and environment

manage in construct and working period of project;- Long Duc commune People’s committee within authority will support to

Investor and appropriate authorizes implement measures to minimize forenvironment impacts in project develop process;

- Long Phu 1 thermal plant project, except specific negative impacts toenvironment of thermal plant projects, have no any special negativeimpacts, while active impacts is considerable and significant to Soc Trangprovince and region, hence implement project is necessary.

- Not cause environmental pollution, exhaust gas and waste water of theplant not exceed allowed value as stipulated.

- Waste water have to be treated before discharge.- Have the cover order to not affect to residential area.

6.2 COMMENTS OF COMMUNE FATHERLAND FRONT COMMITTEE

Comment contribution to environment matters Long Phu 1 power plant ofLong Duc commune Fatherland front committee, Long Phu district, Soc Trangprovince, according official dispatch No 012/UBMTTQ date 15/02/2008(enclosed in appendix 1) collected and classify:- Long Duc commune Fatherland front committee researched EIA’s

summary report of project and agreed with report;


Page 6-2

- Propose Investor implement measures to minimize and environmentmanage in construct and working period of project;

- Long Duc commune Fatherland front committee within authority willsupport to Investor and appropriate authorizes implement measures tominimize for environment impacts in project develop process;

- Long Phu 1 thermal plant project, except specific negative impacts toenvironment of thermal plant projects, have no any special negativeimpacts, while active impacts is considerable and significant to Soc Trangprovince and region, hence implement project is necessary.

- The power plant needs to preserve good hygiene, not cause environmentalpollution. Waste water discharge of the plant needs to conform to currentregulations.

6.3 PUBLIC CONSULTATION

Project Management Board and the consultant were held meetings on publicconsultation in the project area in Nov. 2007. Participants are representativesof PAPs, People’s Committee, non-government organizations (veteransorganization, women organization, farmer organization, etc.). In thesemeetings, related issues and target of the project, impacts on environment andsocio-economic status, environmental management plan, resettlement andcompensation plan, etc. were discussed. All feedbacks of PAPs were recorded.Summarized information were also delivered to PAPs in the forms ofpamphlet and announced at places which are easily seen and readable so thatthe PAPs could catch essential information.Consultant cost is estimated as 15,000,000 VND.

Table 6-1 Public consultation

Consultationmethod

Details of activities Consultation outcomes

Date(s) of notice 15 days

November 2007

Public Notice

Location of notice Long Duc CPC

Yes

Date(s) of noticeNewspaperNotification Name of newspaper

No

Date(s) ofannouncement

Publicannouncement/ radio Time(s) of

announcement

No

Date(s) sent 5-11/11/2007

Number sent 400

Numberreceived

Newsletter/questionnaire

Area of distribution Long Duc commune Main • Economic situation


Page 6-3

Consultationmethod

Details of activities Consultation outcomes

Feedback sought (Yes /No)

Yes issuesraised

of household

• Situation of house,land, trees and crop

• Chose compensated,resettlement project

Date(s) held 10/11/2007 Meetingminutesattached:Yes

Content of discuss:

• Impact onenvironmentalquality

• Impact on socio-economic activities

• Mitigation measures

• Compensation andResettlement plan

Location(s) held Long Duc CPC

Invitees Long Duc CPC

Fatherland frontcommittee

Land survey official

Women’s association

Farmer‘s association

DPs

Methods of invitation Letter of invitation

Publicmeeting

Agenda attached Yes

Attendees: - Representation ofCommune People'sCommittee

- Representation ofFatherland frontcommittee

- Land survey official

- Representation ofFarmer’s Association

- Representation ofWomen’s Association

- Deputy Communecommittee Secretary

- DPs

Publicannouncement after theEIAapproved

Location ofannouncement

Offices of Long DucCPC

Date held(proposed)

04/2008

Opinions are contributed in meetings:- Compensation price of the project needs in accordance with the market

price at the time of clearance.- Setting up resettlement area of the project before clearance. The

resettlement area must be invested as a new urban area with a adequateinfrastructure system such as markets, schools, roads system, electricity,water, ... and cemeteries.

- Suggesting the project support food during the 12 months.- After the project put into operation, expecting the project gets local

workers to work in the power plant.


Page 6-4

Meeting minutes attached in Appendix 1.

6.4 INVESTOR’S COMMITMENT TO COMMUNE PEOPLE’SCOMMITTEE AND FATHERLAND FRONT COMMITTEE

Explain suggestions of Long Duc commune People’s committee andFatherland front committee, Investor has the following comments:- Commitment implement measures to minimize environment impacts in

construct and working period, in EIA’s report;- Ensure measures to minimize for polluted surrounding and local’s standard

living;- Ensure implement environment standard supervise program to discover

and measures to minimize project impacts to local people.- Affected people will be recieved compensation for damage due to the

project and supported according to the state regulations;- Investor ensures to raise the standard of basis for people who were

removed.Related documents of investor and People’s Committee and Fatherland FrontCommittee of Long Duc commune attached in Appendix 1.


7-1

CONCLUSION AND PROPOSITION

1. CONCLUSION

After researching, it can be conclusion as belows:1. Implementing Long Phu 1 Thermal Power Plant project is very necessary,

creating multi-benefit for national economy:- Helping to increase electricity production of the whole country, solving

progressive energy demand in the Mekong Delta, improving safetyenergy and quality of electricity for Soc Trang province and MekongDelta;

- Power plants of Long Phu Power Complex, included Long Phu 1 PowerPlant, will be important contributing source to development of MekongDelta by providing stable and realiable electricity for industrial zones,creating jobs and attracting investment for region;

2. Location of Long Phu 1 Power Plant project is appropriate because:- Located near load which is lack of electricity;- Located on side Hau river therefore advantage of transporting fuel,

collecting water and wasting cooling water;- Located in the center of Long Phu Power Complex so it is far away

from residential areas, thereby affecting population is very small.3. Project area has a communal house, besides there is not any a historical,

cultural monument or natural reservation. Clearance and infrastructuralinvestment (domitary, resettlement for PAHs, etc.) in proposed Long Phu1 Power Plant area in particular and entire Long Phu Power Complex ingeneral are included in "Long Phu - Soc Trang Power CenterInfrastructure” project. Therefore, Long Phu 1 Power Project is consideredbuilding on the land has been liberated and levelled, impact of resettlementis not available.

4. Environmental forecast models show that operation of collecting andwaste cooling water of Long Phu 1 Power Plant do not cause impact onaquiculture as well as water quality in Hau river systems.Process of distributing cooling water reaches TCVN 5945:2005, type A(340C to 38.10C compared with 400C), industrial wastewater standards andguidance of World Bank for new thermal power plant (1998) (ThermalPower - Guidelines for New Plants, Pollution Prevention and AbatementHandbook - Part III, July 1998) therefore does not affect water quality aswell as marine system of area.

5. Waste water of this plant is treated by concentrative wastewater treatmentsystem which reachs TCVN 5945:2005, type A before flows toenvironment.


7-2

6. Main fuel is coal, Long Phu 1 Power Plant has some impact on air quality.Because concentrations of dust and SO2 in exhausted gas are higher thanallowed limits in TCVN 7440:2005, the plant will be installed dusttreatment system with efficient 99% and SO2 treatment system withefficient 85%. Exhausted gas at stack flue (after processing) reachesTCVN 7440:2005. According to calculating exhausted gas emission,concentration of pollutants in region with lower than allowed limits ofambient air standard TCVN 5937:2005, thus, impacts on air quality andthe locals are small.

7. Solid waste of project will be collected, classified, recycled, removedfollowing local systems. For hazardous waste, the project will contractwith a hazardous waste treatment professional company to treat understipulation. The process of collection, storage, transportation, treatmentand trade are complied with the current regulations of solid waste andhazardous waste management.

8. Negative impacts of project can be recovered completely and controlled byminimized measures which mentioned in the report. Environmental targetsat output of technological process of the plant reach the currentenvironmental standards, to help to protect environmental region andstable production.

9. Investor committed implementing minimized impacts measures,environmental management and monitoring in construction and operationphases as presented in the report, complied seriously Vietnamese legal andthe International Convention on environmental protection in managementand treatment of waste from production of plant.

2. PROPOSITION

Because impacts of production electricity of Long Phu 1 Power Plant projecton environment can be controlled and minimized concurrent with constructingproject is very necessary and creating multi-benefit for the national economy.It is played an important role to promote development of the region. Investorsuggests the Ministry of Natural Resources and Environment to consider andapprove for EIA of project to create advanced conditions for implementingproject.

3. COMMITMENT

1. Project owner committees implementing minimized measures negativeimpacts which described in chapter 4; concurrently, project ownercommittees implementing all measures, regulations on environmentalprotection related to developement and implement project.

2. Standards are applied in environmental impact assessment report such as:- National technical regulation on underground water quality QCVN

09:2008/BTNMT.- National technical regulation on surface water quality QCVN


7-3

08:2008/BTNMT.- National technical regulation on domestic waste water QCVN

14:2008/BTNMT.- National technical regulation on the allowable limtis of heavy metals in

the soils QCVN 03:2008/BTNMT.- Ambient air quality standards: TCVN 5937:2005- Air quality standards at sources: TCVN 7440:2005- Acoustics – Noise in public and residental areas TCVN 5949:1998- Decree No.169/2003/N -CP of Government dated 24/12/2003 on

electricity safety.3. Treatment works will be constructed in construction work process and

ensured completely before operation phase.4. Environmental supervising, monitoring and environment safety training

programmes will be implemented in construction and operation phases;and their budget will be ensured by the project owner.

5. Project owner committees not to use prohibited chemicals, microbiologyunder regulations of Vietnam and international conventions.

6. Project owner committees to manage, collect, transport solid waste andhazardous waste meeting current regulations.

7. Project owner committees during operation phase, if the project violatesany international convention or Vietnamese environmental standards andtakes place any environmental issue, the project owner will take fullresponsibility before the law of Socialist Republic of Vietnam.


APPENDICES

Appendix 1: Public consultation – related documents

Appendix 2: Legal documents related to project approval

Appendix 3: Questionnaires on socio-economic condition andenvironmental impact assessment

Appendix 4: List of fauna and flora species, and photos of someflora species in project area

Appendix 5: Analysis results of background environment inproject area

Appendix 6: Calculation on spreading temperature of Hau riverdue to discharge cooling waste water of the plant


APPENDIX 1

PUBLIC CONSULTATION – RELATED DOCUMENTS


APPENDIX 2

LEGAL DOCUMENTS RELATED TO PROJECT APPROVAL


APPENDIX 3

QUESTIONNAIRES ON SOCIO-ECONOMIC CONDITIONAND ENVIRONMENTAL IMPACT ASSESSMENT


APPENDIX 4

4.1 LIST OF FAUNA AND FLORA SPECIES INPROJECT AREA

4.2 PHOTOS OF SOME FLORA SPECIES IN PROJECTAREA

Long Phu 1 Thermal Power Plant EIAConstruction investment project

App 4-1

APPENDIX 4.1 LIST OF FAUNA AND FLORA SPECIES IN PROJECT AREA

Table App4-1: Species composition of zooplankton in Hau Giang riverSampling position

No. Scientific nameTS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS10

Rotatoria1 Brachionus plicatilis *2 Brachionus calyciflorus *3 Platyias quadricornis *4 Polyathra vulgaris 500 10005 Asplanchna priodonta 1000 500 1000 5006 Filinia brachiata 500 25007 Hexathra mira 5008 Lecane luna * *9 Lepadella patella *

Cladocera10 Bosmina longirostris 4000 7000 10000 4000 1000 8000 4000 2500 3000 550011 Bosminopsis deitersi 500 5000 6500 3000 * 4000 1500 1000 1000 *12 Ceriodaphnia rigaudi 500 * 2500 * * 500 500 500 150013 Diaphanosoma sarsi 500 500 1000 3000 1000 * *14 Moina dubia * 1500 * * * * *15 Kurzia longirostris * 100016 Chydorus sphaesicus 50017 Ilyocryptus halyi 500 * 500 *

Copepoda18 Mesocyclops leuckarti 5000 6000 10500 8000 2500 5000 3000 3000 3500 4000


App 4-2

Sampling positionNo. Scientific name

TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS10

19 Tropocyclops sp 500 * * * 50020 Neodiaptomus botulifer * 1500 500 * * * 500 350021 Attheyella sp *22 Pseudodiaptomus incisus * * 500 1500

Ostracoda23 Heterocypris anomala 500 500 * *

Larva24 Copepoda nauplius 12000 1000 1500 33000 5000 10500 7000 * 500 150025 Gastropoda larva 1000 1000 500 2000 500 * 1000 100026 Bivalvia larva 500 500 * 500 *27 Polychaeta larva * * *28 Mysis larva * * *29 Fish yourng (cá con) * *

Total of species 10 14 14 16 10 11 12 14 15 12Total (unit/m3) 25000 21000 37500 55500 9000 30000 18500 10000 9500 20500

Source: Institute of Tropical Biology, Dec. 2007


App 4-3

Table App4-2: Species composition of Phytoplankton in Hau Giang riverSampling position

No. Scientific nameTS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS10

PHYLUM : CYANOPHYTA (t o Lam)GENUS: NOSTOCALES

FAMILY: NOSTOCACEAE1 Anabaena sp. * 653 1820 840 5602 Anabaena sp1 448 1080 26 1250 1280 2253 11043 Anabaena sp2 560 733 200 3204 Anabaena spiroides 192 1000 520 623 440 4805 Cylindrospermopsis raciborskii 4200 2940 2520 2947 2926 3150 3400 2513 3648 41046 Pseudanabaena mucicola 2400 1820 15127 Pseudanabaena sp. 616 784 849 * * * 336 112

GENUS: CHROOCOCCALESFAMILY: CHROOCOCCACEAE

8 Aphanocapsa delicatissima 960 2800 2480 3380 3080 1800 1680 1213 480 *9 Chrorococcus sp. 40 * * 35 4010 Merismopedia glauca 11211 Microcystis aeruginosa 99840 263667 258000 246133 177833 470000 392000 225333 350000 14600012 Microcystis botrys 3120 1120 4320 10487 3080 1200 2720 2253 5440 240013 Microcystis panniformis 960 * *14 Microcystis wesenbergii 1512 8960 5280 9100 2933 6100 9600 9577 7040 960015 Snowella sp. 648

GENUS: OSCILLATORIALESFAMILY: OSCILLATORIACEAE

16 Arthrospira sp. 4144 2483 1368 1387 3227 2520 2600 2643 19200 1040017 Lyngbya sp. 88 *18 Oscillatoria splendida 520


App 4-4


TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS1019 Oscillatoria subbrevis 640 *20 Oscillatoria perornata 5040 6720 3380 4107 4960 2080 12960 224021 Planktothrix sp. 528 *

PHYLUM: BACILLARIOPHYTA(t o Silic)

GENUS: ACHNANTHALESFAMILY: ACHNANTHACEAE

22 Achnanthes sp. 9 16 17 * * 20GENUS: COSCINODISCALES

FAMILY: COSCINODISCACEAE23 Coscinodiscus lineatus * 14 * 4 *24 Coscinodiscus radiatus *25 Coscinodiscus subtilis * *26 Coscinodiscus radiatus 5 * 9 * * * *27 Coscinodiscus gigas *28 Cyclotella comta * 14 * 22 * * 9 20

GENUS: CLIMACOSPHENIALESFAMILY: CLIMACOSPHENIACEAE

29 Climacosphenia moniligera C.G. Ehrenberg * * *GENUS: NAVICULALES

FAMILY: NAVICULACEAE30 Cymbella sp. 5 * * *31 Gyrosigma acuminatum 5 7 *32 Gyrosigma sinensis * *33 Navicula elegans * * * 4 * 4 1234 Pinnularia major * * *

GENUS: FRAGILARIALES


App 4-5


TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS10FAMILY: FRAGILARIACEAE

35 Fragilaria capucina 16 15 8 1736 Fragilaria crotonensis *37 Synedra acus 4 5 22 * * 20 30 *

GENUS: MELOSIRALESFAMILY: MELOSIRACEAE

38 Melosira granulata 168 373 240 312 220 250 288 303 192 14439 M. granulata var. angustisima 216 112 56 104 264 80 80 78 216 120

GENUS: PENNALESFAMILY: NITZSCHIACEAE

40 Nitzschia sp. 5 541 Pinnularia major * 4

GENUS: SURIRELALESFAMILY: SURIRELLACEAE

42 Surirella cf. capronii 4 13 * 4 4 2043 Surirella elegans 4 14 32 * 11 * * *

PHYLUM: CHLOROPHYTA (t o L c)GENUS: ZYGNEMATALESFAMILY: DESMIDIACEAE

44 Closterium gracile * * 5 16 4 4 445 Closterium intermedium 4 846 Closterium moniliferum 4 * 13 1647 Hyalottheca mucosa 48 * *48 Staurastrum curvatum 1749 Staurastrum paradoxum * 9 26 20 32 17 * 850 Staurastrum sexangulare 4


App 4-6


TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS10GENUS: CHLOROCOCCALESFAMILY: MICRACTINIACEAE

51 Micractinium pusillum *FAMILY: HYDRODICTYACEAE

52 Pediastrum duplex 336 224 384 156 264 280 240 277 320 57653 Pediastrum simplex 192 * 32 52 293 180 48 104 48054 Pediastrum tetras 48 40 184

FAMILY: SCENEDESMACEAE55 Actidesmium hookerii * 2656 Coelastrum cambricum 38457 Coelastrum microsporum 56 52 330 * * 40 8058 Crucigenia lauterbornei 2059 Scenedesmus acuminatus 96 112 192 260 147 20 24 35 224 9660 Scenedesmus perforatus * 35 10361 Scenedesmus bijugatus *62 Scenedesmus quadricauda * 37 176 59 20 32 52 64 48

GENUS: CLADOPHORALESFAMILY: CLADOPHORACEAE

63 Ankistrodesmus fusiformis 1664 Chodatella subsalsa 5 12 30 18 5 * 13 * 3665 Tetraedron gracile * * 4 *

FAMILY: ZYGNEMATACEAE66 Spirogyra ionia *67 Spirogyra prolifica * *

GENUS: VOLVOCALESFAMILY: VOLVOCACEAE


App 4-7


TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TS1068 Eudorina elegan 56 87 440 40 32 12069 Pandorina charkoviensis 200 392 1280 693 880 360 240 303 480 32070 Volvoc aureus * *

PHYLUM: EUGLENOPHYTA (t o M t)GENUS: EUGLENIDA

FAMILY: EUGLENACEAE71 Euglena acus 12 5 24 43 4 60 40 30 48 1272 Euglena spirogyra 4 5 40 22 5 * 13 8 1673 Phacus acuminatus Stokes * *74 Phacus caudatus 5 4 15 25 12 475 Phacus curvicauda 5 * * 1276 Phacus longicauda 4 14 4 13 7 5 8 13 24 *77 Phacus pleuronectes 5 7 15 9 20 478 Phacus tortus 4 5 4 22 * 4 17 *79 Strombomonas australica * 15 12 * 880 Strombomonas napiformis * 13 15 4 4 881 Strombomonas sp. * *82 Trachelomonas sp. 4 56

PHYLUM: DINOPHYTA (t o Giáp)GENUS: GONYAULACALES

FAMILY: CERATIACEAE83 Ceratium hirundinella * 16 13 11 * 22 4 28

Total of species 41 40 38 41 40 49 42 46 39 43Total of cells/liter 117080 290775 286552 282044 202191 490050 420176 251125 404856 178936

Source: Institute of Tropical Biology, Dec. 2007* Species found only in qualitative analysis samples, not found in quantitative analysis samples


App 4-8

Table App4-3: Species composition of Zoobenthos in Hau Giang riverSampling position

No. Scientific nameTS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TSS10

MOLLUSCAGastropoda

Thiaridae1 Melanoides tuberculatus Muller, 1774 1 1 1 72 Thiara scabra Muller 2 1 43 Antimelania costula 14 Sermyla tornatella Lea 3

Neritidae5 Neritina sp 16 Nerita sp 5

Buccinidae7 Clea helena 1

Naticidae8 Natica stellata Hedley, 1913 1

Stenothyridae9 Stenothyra glabrata A.Adams 3

Lymnaeidae10 Lymnaea swinhoei Adams 1 2

Littoridinidae11 Pachydrobia messageri Bavay et Dautzenberg, 1912 5

BivalviaCorbiculidae

12 Corbicula leviuscula Prime, 1864 1 1 1 1 1 413 Corbicula lamarckiana 1 114 Corbicula baudoni Morlet, 1886 1 2 1


App 4-9


TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TSS1015 Corbicula moreletiana Prime 116 Corbicula cyreniformis Prime 217 Corbicula tenuis Clessin 5

Mytilidae18 Limnoperna siamensis 119 Limnoperna sp 120 Scaphula pinna Benson 1

POLYCHAETANereidae

21 Namalycastis longicirris Takahasi, 1933 1 4 2 6 2 2Orbiniidae

22 Haploscoloplos elongatus Johnson, 1901 3 2 1 2 423 Scoloplos armiger Muller 4

Opheliidae24 Ophelia cf. limacina Rathke 1

Cirratulidae25 Chaetozone setosa 1

Nereididae26 Neanthes japonica Izuka 227 Ceratonereis erythraeensis Fauvel 1

Sabellidae28 Branchiomma cingulata Grube 1

OLIGOCHAETANaididae

29 Dero sp 3 2 3ISOPODA


App 4-10


TS1 TS2 TS3 TS4 TS5 TS6 TS7 TS8 TS9 TSS1030 Idothea baltica Pallas, 1772 231 Idothea sp 1 132 Idothea sp1 133 Cyathura carinata 1

AMPHIPODAAmpeliscidae

34 Byblis sp 2 335 Ampelisca sp 2

AQUATIC INSECTAChironomidae

36 Cricotopus sp 6Diptera

Chaoboridae37 Chaoborus sp 1

LARVA38 Amphipoda larva 2 2039 Polychaeta larva 540 Gastropoda larva 3

Total of species 6 7 7 3 3 6 7 10 2 13

Total (unit/m2) 110 120 130 60 40 270 120 220 50 510Source: Institute of Tropical Biology, Dec. 2007


App 4-11

Table App4-4: List of fish species in project area (Dec. 2007)

NotesNo. Vietnamese name Scientific name Kinh

TNg t L -

m nI B CÁ THÁT

LÁTOSTEOGLOSSIFORMES

1 H cá thát lát Notopteridae1 Cá thát lát Notopterus notopterus (Pallas, 1780) *

II B CÁ TRÍCH CLUPEIFORMES2 H cá trích Clupeidae

Phân h cá c msông

Ð»´´±²«´·²¿»

2 Cá c m sông Corica sorbona Hamilton, 1822 * *3 H cá tr ng Engraulidae

3 Cá m gà Coilia lindmani Bleeker, 1858 *III B CÁ CHÉP CYPRINIFORMES

4 H cá chép Cyprinidae4 Cá mang Puntius orphoides (Valenciennes, 1842) *5 Cá mè vinh Barbonymus gonionotus (Bleeker, 1850) *

Phân h cá trôi Ô¿¾»±·²¿»

6 Cá mè hôi Osteochilus melanopleurus (Bleeker, 1852) *Phân h cá chép Ý§°®·²·²¿»

7 Cá d nh Puntioplites proctozysron (Bleeker, 1865) *5 H cá ch ch Cobitidae

Phân h cá ch ch Ý±¾·¬·²¿»

8 Cá khoai Acantopsis choirorhynchos (Bleeker, 1854) *IV B CÁ NHEO SILURIFORMES

6 H cá l ng Bagridae *9 Cá ch t v ch Mystus rhegma Fowler, 1935 *10 Cá ch t s c Mystus vittatus (Bloch, 1794) * *

7 H cá tra Pangasiidae11 Cá tra nuôi Pangasius hypophthalmus (Bleeker, 1878) *12 Cá bông lau Pangasius krempfi Fang and Chaux, 1949 * *13 Cá sát s c Pangasius macronema Bleeker, 1851 *

8 H cá trê Clariidae14 Cá trê tr ng Clarias batrachus (Linnaeus, 1785) *

9 H cá úc Ariidae15 Cá úc tr ng Arius sciurus Smith, 1931 * *

10 H cá ngát Plotosidae16 Cá ngát Plotosus canius (Hamilton, 1822) * *

V B CÁ CÓC BATRACHOIDIFORMES


App 4-12


TNg t L -

m n11 H cá m t qu Batrachoididae

17 Cá m t qu Allenbatrachus grunniens (Linnaeus, 1758) *VI B CÁ NHÁI BELONIFORMES

12 H cá lìm kìm Hemiramphidae18 Cá lìm kìm Zenarchopterus clarus Mohs, 1926 *19 Cá lìm kìm sông Zenarchopterus ectuntio (Hamilton, 1822) *

VII B CÁ MANGLI N

SYNBRANCHIFORMES

13 H cá l ch ng Synbranchidae20 L n ng Monopterus albus (Zuiew, 1793) * *

14 H cá ch ch sông Mastacembelidae21 Cá ch ch lá tre Macrognathus siamensis Gunther, 1861 *VIII B CÁ V C PERCIFORMES

15 H cá ch m Centropomidae * *22 Cá ch m Lates calcarifer (Bloch, 1790)

16 H cá s n Ambassidae23 Cá s n x ng Ambassis gymnocephalus (Lacepède, 1802) *

17 H cá s u Sciaenidae24 Cá s u Nibea soldado (Lacepede, 1802) *

18 H cá nh Polymenidae25 Cá phèn vàng Polynemus paradiseus Linneus, 1758 * *

19 H cá h ng Coiidae26 Cá h ng Datnioides microlepis (Bleeker, 1853) *

20 H cá rô phi Cichlidae27 Cá rô phi r n Oreochromis niloticus niloticus (Linnaeus,

1758)* *

21 H cá b ng en Eleotridae28 Cá b ng d a Oxyeleotris urophthalmus (Bleeker, 1851) *

22 H cá b ng tr ng GobiidaePhân h cá b ngtr ng

Gobiinae

29 Cá b ng cát t i Glossogobius giuris (Hamilton, 1822) *30 Cá b ng cát tr ng Glossogobius sparsipapillus Akihito & Meguro,

1976*

Phân h cá b ngkèo

Oxudercinae

31 Cá b ng kèo Pseudapocryptes elongatus (Cuvuer, 1816) * *32 Cá thoi lòi Periophthalmodon schlosseri (Pallas, 1770) *33 Cá b ng sao Boleophthalmus boddarti (Pallas 1770) *

23 H cá rô ng Anabantidae


App 4-13


TNg t L -

m n34 Cá rô ng Anabas testudineus (Bloch, 1792) * *

24 H cá lóc Channidae35 Cá lóc Channa striata (Bloch, 1797)

IX B CÁ B N PLEURONECTIFORMES25 H cá b n s c Soleidae

36 Cá l i lá mít Euryglossa panoides (Bleeker, 1851) *26 H cá b n cát Cynoglossidae

Phân h Cynoglossinae37 Cá b n l i trâu Cynoglossus lingua Hamilton, 1822 *

11 21 16Source: Institute of Tropical Biology, Dec. 2007

Table App4-5: List of flora species in project areaNo Species Family Vietnamese name

POLYDIOPHYTA KHUY T TH C V T1 Acrostichum aureum L ADIANTACEAE Ráng i2 Azolia pinata Br. SALVINIACEAE Bèo dâu3 Lygodium flexuosum (L.) Sw. SCHIZEACEAE Bòng bòng d u4 Marsilea quadrifolia L. MARSILEACEAE Rau b5 Salvinia cucullata Roxb. SALVINIACEAE Bèo tai chu t6 Stenochiaena palustris (Burm.f) ADIANTACEAE Dây cho i

DICOTYLEDONAE TH C V T 2 LÁM M

7 Abelmoschatus moschatus Medicus. MALVACEAE B p vang8 Abutilon indicum (L) Sweet. MALVACEAE C i xay9 Acacia auriculiformis Willd FABACEAE Keo lá tràm10 Acanthus ebracteatus ACANTHACEAE Ô rô11 Adenostemma macrophyllum (BL) ASTERACEAE Tuy n hùng lá to12 Aeschynomene aspera FABACEAE i n ma13 Ageratum conyzoides L ASTERACEAE C c t heo14 Alternanthera paronichioides AMARANTHACEAE Di u15 Alternanthera sessilis (L) A. DC. AMARANTHACEAE Rau di c16 Alternanthera tricolor var. splendens

BaiAMARANTHACEAE D n c m

17 Anacardium occidentale L. ANACARDIACEAE i u18 Ananas comosus (L) Merr. BROMELIACEAE Khóm19 Aniseia martinicensis (Jacq.) Choisy CONVOLVULACEAE Bìm n c20 Annona muricata l. ANNONACEAE Mãng c u xiêm21 Annona squamosa L. ANNONACEAE Mãng c u ta22 Anona glabra L ANNONACEAE Bình bát23 Ariocarpus heterophyllus Lamk. MORACEAE Mít nhà24 Artocarpus altilis (Park) Fosk. MORACEAE Xa kê25 Artocarpus integer (Thunb) Merr. MORACEAE Mít t n26 Averrhoa carambola L. OXALIDACEAE Kh27 Avicennia alba Blume VERBENACEAE M m tr ng


App 4-14

No Species Family Vietnamese name28 Basella rubra L. BASELLACEAE M ng t i29 Benicasia hispida (Hunb.) Cogn. CUCURBITACEAE Bí ao30 Blumea lacera (Burm. F.) DC. ASTERACEAE C i tr i31 Blumea megacephala (Rand.) Chang ASTERACEAE C m c32 Brassica integrifolia (Willd)

O.F.Schultz.BRASSICACEAE C i ng t

33 Caesalpinia pulcherrima FABACEAE i p cúng34 Callophyllum inophyllum L. GUTTIFERAE Mù u35 Capsicum frutescens L. SOLANACEAE t36 Carica papaya L. CARICACEAE u37 Carmone microphylla (Lam) Don. BORAGINACEAE Cùm r m38 Cassia alata L. FABACEAE Mu ng trâu39 Cassia grandis L.f FABACEAE Mu ng ô môi40 Cassia mimosoides L. FABACEAE Mu ng trinh n41 Cassia tora L. FABACEAE Mu ng hôi42 Cassytha filiformis L. LAURACEAE T xanh43 Cayratia trifolia (L.) Domino VITACEAE Vác44 Ceiba pentandra (L) Gaertn BOM BACACEAE Gòn45 Celosia argentia L AMARANTHACEAE M ng gà46 Centalia asiatica (L.) Urb. APIACEAE Rau má47 Ceratophyllum dermesum CERATOPHYLLACEA

ERong uôi ch n

48 Chrysophyllum canitoL. SAPOTACEAE Vú s a49 Citris aurantifolia (Chitm.) Sw. RUTACEAE Chanh50 Citris grandis (L) Osb. var. grandis RUTACEAE B i51 Citrus nobilis Lour. RUTACEAE Cam sành52 Citrus reticulata Blco. RUTACEAE Quít ta53 Citrus sinensis (L) Osb. RUTACEAE Cam54 Cleome chelidonii Lf CAPARACEAE Màng màng tím55 Clerodendrum inerme VERBENACEAE Ng c n56 Clerodendrum palmatilobatum VERBENACEAE Mó dò57 Combretum quadragulare Kurz. COMBRETACEAE Ch n b u58 Cryptolepis balansae iH. Baill. APOCYNACEAE Hu nh anh lá h p59 Cucumis sativus L. CUCURBITACEAE D a leo60 Delonix regia (Hook.) Raf. FABACEAE Ph ng v61 Derris trifolia Lour. FABACEAE Cóc kèn62 Desmosdium triforum FABACEAE Tràng qu ba hoa63 Dimocarpus longan Lour. SAPINDACEAE Nhãn64 Dipterocarpus alatus DIPTEROCARPACEA

ED u rái

65 Dolichandrone spathacea (L.f) K. BIGNONIACEAE Quao n c66 Dracaena sanderiana Forma. AGAVACEAE Phát tài67 Durio zibethinus Murr. BOMBACACEAE S u riêng68 Eclipta prostrata ASTERACEAE C m c69 Erythrina variegata FABACEAE Vong nem70 Eucalyptus sp. MYRTACEAE B ch àn71 Eupatorium odoratum L. ASTERACEAE C hôi72 Euphorbia antoquorum L. EUPHORBIACEAE X ng r ng73 Euphorbia cyathophora EUPHORBIACEAE Tr ng nguyên74 Euphorbia heterophylla EUPHORBIACEAE C m75 Euphorbia hirta L. EUPHORBIACEAE C s a lông76 Euphorbia milii EUPHORBIACEAE Bát tiên


App 4-15

No Species Family Vietnamese name77 Ficus hirta Vahl. var. hirta MORACEAE Ngái lông78 Ficus hispida L. f. var hispida MORACEAE S p79 Ficus microcarpa f.f. MORACEAE G a80 Ficus racemosa L. MORACEAE Sung81 Ficus superba var. japonica Miq. MORACEAE Ngái phún82 Glinus oppositifolius (l.) DC. SCROPHULARIACEA

ERau ng t

83 Glochidion littorale Bl. EUPHORBIACEAE Trâm b t84 Gmelia asiataca L. VERBENACEAE Tu hú85 Grangea maderaspatana (L.) Poir. ASTERACEAE C i ng86 Grewia sinuata Wall. TILIACEAE Cò kè n87 Gymnopetalum conchinchinensis CUCURBITACEAE C t qu88 Heliotropium indicum L BORAGINACEAE Vòi voi89 Hibicus rosa-sinensis L. MALVACEAE Giâm b t90 Hibicus schizopetalus (Mast.) Hook.f MALVACEAE B p rìa91 Hibicus tiliceus L. MALVACEAE B p tra92 Hopea odorata Roxb. DIPTEROCARPACEA

ESao en

93 Hura crepitans L. EUPHORBIACEAE Mã u94 Impomoea aquatica Forssk. CONVOLVULACEAE Rau mu ng95 Impomoea batatas (L.) Lamk. CONVOLVULACEAE Khoai lang96 Indigofera spicata Forssk. FABACEAE Chàm gié97 Ixora chinensis RUBIACEAE Trang98 Lantana camara L. VERBENACEAE Th m i99 Leea rubra Bl ex Spreng LEEACEAE G i h c100 Lindernia antipoda (L.) Alston SCROPHULARIACEA

EMàn t

101 Ludvidgia adscendens (L) Hara ONAGRACEAE Rau d a n c102 Ludvidgia octavalvis (Jacq.) Raven ONAGRACEAE Rau m ng ng103 Ludvidgia octovalvis ONAGRACEAE Rau m ng104 Ludvidgia prostrata Roxb. ONAGRACEAE Rau m ng n m105 Luffa cylindrica (L.) M. J. Roem CUCURBITACEAE M p h ng106 Lycopersicon esculentum (L) Mill. SOLANACEAE Cà chua107 Malpigia glabra L. MALPIGHIACEAE S ri108 Mangifera indica L ANACARDIACEAE Xoài109 Manihot esculenta Crantz. EUPHORBIACEAE S n110 Melaleuca cajuputi L. MYRTACEAE Tràm111 Melastoma affine D. Don MELASTOMATACEA

EMuôi a hùng

112 Merremia hederacea (Burm. f) Hall CONVOLVULACEAE Bìm hoa vàng113 Michelia alba DC. MAGNOLIACEAE Ng c lan tr ng114 Momordica charatia L. CUCURBITACEAE M p ng115 Monochoria cyanea F.Muell. PONTEDERIACEAE Rau mác lam116 Monochoria vaginalis (Burm.f) Presl. PONTEDERIACEAE Rau mác bao117 Morinda citrifolia L. var. bracteata RUBIACEAE Nhàu n c118 Muntingia calabura L ELAEOCARPACEAE Tr ng cá119 Myriophyllium dicoccum HALORAGACEAE Rong uôi chó120 Nauclea officinalis (Roxb) Ridsd. RUBIACEAE Gáo n c121 Nelumbo nucifera Gaertn. NELUMBONACEAE Sen122 Nymphaea pubescens NYMPHAEACEAE Súng tr ng123 Nymphaea rubra Roxb.ex. Salisb. NYMPHAEACEAE Súng124 Ochna integerrima (Lour.) Merr. OCHNACEAE Mai vàng


App 4-16

No Species Family Vietnamese name125 Ocimum basilicum L. LAMIACEAE Húng qu126 Orthosiphon spiralis LAMIACEAE Râu mèo127 Oxalis corniculata L. OXALIDACEAE Me t nh128 Paederia consimilis Pierre ex. Pit RUBIACEAE Thúi t129 Passiflora foetida L. PASIFOLIACEAE Nhãn l ng130 Peltophorum pterocarpum FABACEAE Lim x t131 Phasealus vulgaris L FABACEAE u ve132 Phyla nodiflora VERBENACEAE Dây l c133 Phyllanthus acidus (l.) Skeeis. EUPHORBIACEAE Chùm ru t134 Phyllanthus amarus Schum. & Thonn. EUPHORBIACEAE Di p h châu135 Phyllanthus reticulata Poir. EUPHORBIACEAE Phèn en136 Phyllanthus urinasia L. EUPHORBIACEAE Chó137 Physalis angulata L. SOLANACEAE Thù lù c nh138 Piper betle L. PIPERACEAE Tr u139 Piper nigrum L. PIPERACEAE H tiêu140 Pluchea indica (L.) Lees ASTERACEAE Lúc n141 Plumeria obtusa L. APOCYNACEAE i142 Polygonum hydropiper L. POLYGONACEAE Ngh143 Polygonum odoratum Lour. POLYGONACEAE Rau r m144 Polygonum tomentosum Wild. POLYGONACEAE Ngh lông145 Psidium guiava L. MYRTACEAE i146 Psophocarpus tetragonolobus L. FABACEAE u r ng147 Rhizophora apiculata Bl. RHIZOPHORACEAE c ôi148 Ruellia tuberosa L ACANTHACEAE Trái n149 Samanea saman (Jacq.) Merr. FABACEAE Còng150 Sauropus androgynus (L.) EUPHORBIACEAE Rau ngót151 Scoparia dulcis L SCROPHULARIACEA

ECam th o nam

152 Sesbania grandiflora (L.) Pers. FABACEAE So a153 Sesbania javanica Miq. FABACEAE i n i n phao154 Sesbania sesban (L.) Merr. FABACEAE iên i n155 Sida acutaL. MALVACEAE Ch i c156 Solanum melogena L. SOLANACEAE Cà tím157 Sonneratia alba J. E. SONNERATIACEAE B n tr ng158 Spondias cythera Sonn. ANACARDIACEAE Cóc159 Synedrella nodiflora (L.) Gaertn. ASTERACEAE B xít160 Syzygium cinereum (Wight.) Walp MYRTACEAE Trâm161 Syzygium semarangense (Bl) Merr &

Perry.MYRTACEAE M n

162 Tagetes erecta L. ASTERACEAE V n th cao163 Tagetes patula L, ASTERACEAE V n th nh164 Tamarindus indica FABACEAE Me165 Termanalia catappa COMBRETACEAE Bàng166 Thespesia lampas (Cav.) Daiz. MALVACEAE Tra nh167 Urena lobata L. MALVACEAE Ké hoa ào168 Urena procumbens L. MALVACEAE Ké khuy t169 Utricularia aurea LENTIBULARIACEAE Nh cán170 Vernonia cinerea (L) Less. ASTERACEAE B ch u ông171 Vigna doichoides Bak. FABACEAE u lông172 Vigna luteola (Jacq.0 Benth. FABACEAE u vàng173 Vigna unguiculata subsp. sesquipedalis FABACEAE u a174 Vigna unguiculata subsp. unguiculata FABACEAE u en


App 4-17

No Species Family Vietnamese name175 Wedelia biflora ( L.) D. C. ASTERACEAE Rau mui176 Wrightia religiosa (Teijim & Binn.) APOCYNACEAE Mai chi u th y177 Zehneria indica (Lour.) Keyr. CUCURBITACEAE D a chu t

MONOCOTYLEDON TH C V T 1 LÁM M

178 Achyranthes aspera L. CYPERACEAE C x t179 Aglaodorum griffithii (Schott.) ARACEAE Mái d m180 Alocasia odora C. Koch. ARACEAE B c hà181 Areca catechu L. ARECACEAE Cau182 Bambusa tuldoides Munro POACEAE Hóp183 Bambusa. vulgaris Schrader POACEAE Tre tàu184 Bulbostylis bacbata CYPERACEAE B m râu185 Caryota mitis Lour. ARECACEAE ng nh186 Chrysalidxacarpus lutescens Wendl ARECACEAE Cau ki ng vàng187 Cocos nucifera L ARECACEAE D a188 Colocasin esculenta (L.) Schott. ARACEAE Môn n c189 Commelia commonis L. COMMELINACEAE Rau trai th ng190 Commelia paludosa Bl. COMMELINACEAE Rau trai n c191 Costus speciosua (Koenig) Smith. ZINGIBERACEAE Cát l i192 Cymbopogon citratus (DC.) Stapf. POACEAE S193 Cyperus compactus Retz. CYPERACEAE U du tía194 Cyperus dubius CYPERACEAE C b c u195 Cyperus elatus L CYPERACEAE U du cao196 Cyperus grandis C. B. CL CYPERACEAE U du to197 Cyperus halpan CYPERACEAE Cú c m198 Cyperus polystachyos CYPERACEAE Cú ma199 Dactyloctenium aegyptiacum POACEAE C chân gà200 Echinochloa crus-galli (L.)Beauvorr POACEAE C l ng v c201 Echinochloa procera (Retz.) Jeswiel. POACEAE C m t202 Eichhornia crassipes (Maret) Solms PONTEDERIACEAE L c bình203 Elausine indica (L) gaertn. POACEAE C m n tr u204 Eleocharis dulcis CYPERACEAE N ng kim205 Erianthus arundinaceus (Retz.) POACEAE C206 Fimbristylis sieberiana Lamk CYPERACEAE Mao th 5 c nh207 Flagellaria Indica L. FLAGELLARIACEAE Mây n c208 Languas galanga (L.) Stuntz. ZINGIBERACEAE Ri ng n p209 Licuala spinosa Wurmb. ARECACEAE M t c t gai210 Limnocharis flava (L.) Buch. LIMNOCHARITACEA

EKèo nèo

211 Maranta arundinacea L. MARANTACEAE Hu nh tinh212 Monochoria hastata (L.) Solms. PONTEDERIACEAE Rau mác213 Musa bakeri Hook. MUSACEAE Chu i214 Musa nana Lour. MUSACEAE Chu i già lùn215 Musa paradisiaca L. MUSACEAE Chu i tây216 Nypa fruticans Wurmh. ARECACEAE D a n c217 Oryza sativa L. POACEAE Lúa218 Panicum repens POACEAE C ng219 Paspalum commersonii Lamk. POACEAE San tr ng220 Paspalum paspaoides (Michx.) POACEAE San n c221 Paspalum scrobiculatum L POACEAE San tròn222 Phragmites vallatoria ( L) Vedk. POACEAE S y223 Pistia stratioites L. ARACEAE Bèo cái


App 4-18

No Species Family Vietnamese name224 Saccharum arumdinaceum POACEAE Lau225 Saccharum officinarum L. POACEAE Mía226 Schumannianthus dichotomus (Benth

& Hook) Gagn.MARANTACEAE Lùn n c

227 Scirpus grossus Lf CYPERACEAE Lác h nSource: Institute of Tropical Biology, Dec. 2007


App 4-19

APPENDIX 4.2 PHOTOS OF SOME FLORA SPECIESIN PROJECT AREA

Photo App4-1 Sonneratia caseolarisB n chua

Photo App4-2 Aniseia martinicensisBìm n c

Photo App4-3 Lygodium flexuosumBòng bong

Photo App4-4 Hibiscus tiliaceusB p tra

Photo App4-5 CitrusCam

Photo App4-6 Costus speciosusChóc


App 4-20

Photo App4-7 Sida acutaCh i c

Photo App4-8 Achyranthes asperaC x c

Photo App4-9 Cananga odorataCông chúa

Photo App4-10 Psophocarpus tetragonolobusu r ng

Photo App4-11 Hygrophila salicifoliaình l ch

Photo App4-12 Hyptis rhomboideaÉ u l n


App 4-21

Photo App4-13 Zingiber officinaleG ng

Photo App4-14 Urena lobataKé hoa ào

Photo App4-15 Limnocharis flavaKèo nèo

Photo App4-16 Echinochloa colonaLòng v c c n

Photo App4-17 Passiflora foetidaNhãn lòng

Photo App4-18 Morinda citrifoliaNhàu


App 4-22

Photo App4-19 Phyllanthus reticulatusPhèn en

Photo App4-20 Dolichandron spathacea Quaon c

Photo App4-21 Ipomoea aquaticaRau mu ng

Photo App4-22 Commelina diffusaRau trai

Photo App4-23 Wendalia triloba 2 Photo App4-24 Mangifera indicaXoài


APPENDIX 5

ANALYSIS RESULTS OF BACKGROUND ENVIRONMENTIN PROJECT AREA


App 5-1

APPENDIX 5ENVIRONMENTAL PARAMETERS AND SURVEY METHODS

TT Environmentalcomponents Parameter Monitoring methods Implemented by

1 Surface water - Temperature- pH- EC- TSS- BOD5- Cl-- Total Fe- NH4+- NO3-- Total P- Total lubricant- Total coliform

Sension 156 (Hach – USA)Sension 156 (Hach – USA)Sension 156 (Hach – USA)TCVN 4560:90

TCVN 6194-96TCVN 6177-96TCVN 5988-95TCVN 6180-96TCVN 6202-96

SMEWW 9221

Institute ofTropical Biology

2 Undergroundwater

- Temperature- pH- EC- Turbidity- DO- Cl-- Total Hard- Ca- Mg- SO4- NO2-- NH4+- HCO3-- Silicate- Silicat (glue)- Mn- Fe

SenSion156 (Hach – USA)SenSion156 (Hach – USA)SenSion156 (Hach – USA)SMEWW 2130BSenSion156 (Hach – USA)TCVN 6194-96TCVN 6224-96SMEWW 5530-Ca – BSMEWW 4500-Mg – BTCVN 6200-96TCVN 6178-96TCVN 5988-95

SMEWW 4500-Si

TCVN 6002-95TCVN 6177-96


3 Soil - pH- Cu- As- Cr- Pb- Cd

TCVN 6496-99TCVN 6496-99TCVN 6496-99TCVN 6496-99TCVN 6496-99TCVN 6496-99


4 Air - Temperature- Humidity- Wind speed- Noise- Light-Dust concentration- Others

Equipments:- Japan scales SHINKODENSI, sensitivity 1 x 10-4gr.- Spectrophotometer-

UNICO–USA-CHINAmodel 1100RS. ShimadzuUV VisibleSpectrophotometer (UVmini-1240 – SHIMADZU



App 5-2

TT Environmentalcomponents Parameter Monitoring methods Implemented by

CORPORATION –KYOTO, JAPAN)- Center 329 Mini soundlevel meter (TAIWAN)Temperature and humidity

meter 635 (TESTO-GERMANY). HTM- 1004with sensor Pt -1000 DINClas B (German) andPolymer Thin-film(German)- Light meter model 401025(EXTECH-TAIWAN)Method for analyzing:Measure by weighconcentration. Gas andsteam are sampled byabsorbed method.Analysing method followby Vietnamese standard

INSTITUTE OF TROPICAL BIOLOGYDEPARTMENT OF ENVIRONMENTAL TECHNOLOGY AND MANAGEMENT

85 Tran Quoc Toan St. – Dist.3 – Ho Chi Minh CityTel: 08 9326 084 Fax: 08 9320 671

RESULTS OF SURFACE WATER QUALITYProject: Long Phu 1 Thermal Power Plant Project Date of sampling: Dec. 18th, 2007

TCVN 5942:1995No Parameter Unit NM1 NM2 NM3 NM4 NM5 A B1 To oC 27.5 27.4 27.2 27.7 28.1 - -2 pH 6.95 6.76 6.83 7.44 7.45 6-8.5 5.5-93 EC µS/cm 62.3 55.2 52.6 58.5 56.0 - -4 TSS mg/l 77 102 97 80 96 20 805 BOD5 mg/l 2 1 2 2 2 4 256 Cl- mg/l 15.27 10.86 7.53 10.30 7.99 - -7 Total Fe mg/l 1.80 2.16 2.17 2.12 2.38 1 28 NH4

+ mg/l 0.02 0.05 0.05 0.06 0.05 0.05 19 NO3

- mg/l 0.79 0.62 0.58 0.63 0.54 10 1510 Total P mg/l 0.10 0.13 0.12 0.15 0.15 - -11 Oil and grease mg/l 0.062 0.040 0.048 0.073 0.039 0 0.312 Coliform MPN/ 100ml 4300 9000 2400 7000 9000 5000 10000

Sampling position: NM1- in temple of Loi Duc hamlet, NM2, NM3, NM4– in junction of Ba Sam canal and Dai Ngai river, NM5 –in Ba Sam canal.

HCM city, Dec. 28th, 2007Institute of Tropical Biology

(Signed)

Hoang Nghia Son



RESULTS OF UNDERGROUND WATER QUALITY

Project: Long Phu 1 Thermal Power Plant Project Date of sampling: Dec. 18th, 2007

No Parameter Unit NN1 NN2 NN3 TCVN 5944:1995

1 To oC 26,2 26,5 26,3 -

2 pH 6,45 6,23 6,75 6,5-8,5

3 EC µS/cm 221 250 240 -

4 Turbidity NTU 11,5 7,1 20,1 -

5 DO mg/l 4,58 4,92 4,67 -

6 Cl- mg/l 22,33 2,56 9,87 200-600

7 Hardness mgCaCO3/l 191 202 220 300-500

8 Ca mg/l 32,2 35,8 37,8 -

9 Mg mg/l 26,5 26,9 30,2 -

10 SO4 mg/l 46,38 30,82 42,59 200-400

7 NO2 mg/l 0,01 0,01 <0,01 -

8 NH4+ mg/l 1,14 0,89 1,11 -

9 HCO3 mg/l 267 310 329 -

10 Total Silicat mg/l 23,4 23,5 21,3 -

11 Colloidal Silicat mg/l 23,0 21,7 18,7 -



No Parameter Unit NN1 NN2 NN3 TCVN 5944:1995

12 Mn mg/l 0.22 0.16 0.07 0.1-0.5

13 Fe mg/l 1.53 1.16 0.46 1-5

Sampling position: NN1 and NN3: wells in project area, NN2: well outside project area.HCM city, Dec. 28th, 2007Institute of Tropical Biology

(Signed)

Hoang Nghia Son



RESULTS OF SOIL QUALITY


No Parameter Unit 1 2 3 4 5 TCVN7209:2002

1 pH 7.35 7.31 7.60 7.38 7.18 6-8.5

2 Pb mg/kg 19.18 19.96 18.01 19.19 18.64 120

3 Cu mg/kg 16.84 18.48 16.72 20.17 18.23 70

4 As mg/kg 6.35 6.19 9.00 6.22 7.07 12

5 Cr mg/kg 19.68 17.02 15.67 19.01 15.24 -

6 Cd mg/kg 0.20 0.24 0.15 0.29 0.18 5Sampling position: 1- temple of Loi Duc hamlet, 2, 3, 4– in junction of Ba Sam canal and Dai Ngai river, 5 – in Ba Samcanal


(Signed)

Hoang Nghia Son



RESULTS OF AIR QUALITY


Dust NO2 SO2 CO Temperature Humidity Wind velocity Noise levelParameter

(mg/m3) (mg/m3) (mg/m3) (mg/m3) oC % m/s dBA

KK1 0.18 0.07 0.08 1.2 29.6 52.8 0.3 – 0.9 42 – 44

KK2 0.15 0.06 0.09 1.3 31.5 53.8 0.2 – 0.8 40 – 42

KK3 0.23 0.07 0.05 1.5 31.8 56.2 0.5 – 1.1 41 – 45

KK4 0.16 0.05 0.06 1.4 32.1 58.6 0.4 – 0.9 40 – 43

TCVN 5937:2005 0.3 0.2 0.35 30 - - - 60 *

Sampling position: KK1, KK2 – in Long Phu 1 power plant area, KK3 – in Long Phu 2 power plant area, KK4–– in Long Phu 3power plant area


(Signed)

Hoang Nghia Son

INSTITUTE OF TECHNICAL AND SCIENCE ON RESOURCES AND ENVIROMENT MANAGEMENTOffice: 308/29 Hoang Van Thu St., Tan Binh Dist., HCM CityTel: 08-2750409, 08-2145057, 0977 888 777, fax: 08-8458410

RESULTS OF SURFACE WATER QUALITYProject: Long Phu 1 Thermal Power Plant Project Date of sampling: March 03rd, 2008

TCVN 5942:1995No Parameter Unit NM6 NM7 NM8 NM9 NM10 A B1 To oC 26.5 27.5 27.7 27.4 28.2 - -2 pH 6.90 6.66 6.74 7.45 7.55 6-8.5 5.5-93 EC µS/cm 63.3 56.5 54.6 58.0 56.5 - -4 TSS mg/l 76 105 96 85 90 20 805 BOD5 mg/l 1 2 1 1 2 4 256 Cl- mg/l 14.27 10.75 7.40 11.20 7.90 - -7 Total Fe mg/l 1.85 2.20 2.15 2.10 2.30 1 28 NH4

+ mg/l 0.04 0.03 0.04 0.05 0.04 0.05 19 NO3

- mg/l 0.70 0.65 0.55 0.60 0.52 10 1510 Total P mg/l 0.12 0.11 0.14 0.12 0.13 - -11 Oil and grease mg/l 0.052 0.045 0.040 0.070 0.035 0 0.312 Coliform MPN/ 100ml 3300 7000 3400 5600 8000 5000 10000

Sampling position: NM6 – in resettlement place area, NM7 – in Project Management Board Building, NM8 – in Operation Housing Estate Place,NM9, NM10 – along Ba Sam canal.

HCM city, March 15th, 2008Deputy Director

(Signed)

Huynh Tien Dat


RESULTS OF UNDERGROUND WATER QUALITYProject: Long Phu 1 Thermal Power Plant Project Date of sampling: March 03rd, 2008No Parameter Unit NN4 NN5 TCVN 5944:19951 To oC 26.2 26.4 -2 pH 6.35 6.45 6.5-8.53 EC µS/cm 225 245 -4 Turbidity NTU 11.0 7.5 -5 DO mg/l 4.60 4.85 -6 Cl- mg/l 22.35 2.50 200-6007 Hardness mgCaCO3/l 195 200 300-5008 Ca mg/l 32.5 35.5 -9 Mg mg/l 26.6 26.9 -

10 SO4 mg/l 45.30 30.80 200-4007 NO2 mg/l 0.01 0.01 -8 NH4

+ mg/l 1.15 0.85 -9 HCO3 mg/l 270 305 -

10 Total Silicat mg/l 23.5 23.5 -11 Colloidal Silicat mg/l 23.0 22.9 -12 Mn mg/l 0.20 0.18 0.1-0.513 Fe mg/l 1.50 1.20 1-5

Sampling position: NN4 – in well of householder Le Van Kich, NN5 – Dai Ngai water supply station.HCM city, March 15th, 2008

Deputy Director

(Signed)

Huynh Tien Dat


RESULTS OF SOIL QUALITYProject: Long Phu 1 Thermal Power Plant Project Date of sampling: March 05th, 2008

Sampling position TCVNNo Parameter Unit 6 7 7209:20021 pH - 7.40 7.36 6-8.52 Pb mg/kg 19.20 19.80 1203 Cu mg/kg 17.50 18.40 704 As mg/kg 6.50 6.30 125 Cr mg/kg 18.55 16.50 -6 Cd mg/kg 0.18 0.25 5

Sampling position: 6- in resettlement place area, 7- in Project Management Board Building.


(Signed)

Huynh Tien Dat


RESULTS OF AIR QUALITYProject: Long Phu 1 Thermal Power Plant Project Date of sampling: March 05th, 2008

Dust NO2 SO2 CO Temperature Humidity Windvelocity Noise levelParameter

(mg/m3) (mg/m3) (mg/m3) (mg/m3) oC % m/s dBAKK5 0.17 0.06 0.10 1.3 29.5 52.5 0.3 – 0.8 42 – 43KK6 0.15 0.07 0.07 1.2 31.5 53.6 0.2 – 0.9 40 – 41KK7 0.16 0.09 0.06 1.1 31.0 52.5 0.2 – 0.8 40 – 41KK8 0.24 0.2 0.07 1.4 31.5 56.7 0.3 – 1.0 40 – 45KK9 0.17 0.05 0.8 1.6 32.4 58.6 0.2 – 0.9 40 – 42TCVN5937:2005 0.3 0.2 0.35 30 - - - 60 *

Sampling position: KK5 - near Dai Ngai river, KK6, KK7,KK8 – in Operation Housing Estate Place, KK9 – near Ba Sam canal.


(Signed)

Huynh Tien Dat


APPENDIX 6

CALCULATION ON SPREADING TEMPERATURE OFCOOLING WASTE WATER OF THE PLANT


App 6-1

APPENDIX 6

CALCULATION ON SPREADING TEMPERATURE OFCOOLING WASTE WATER OF LONG PHU 1 TPP

1. CALCULATION TOPOGRAPGY

Long Phu 1 Thermal Power Plant locates at Loi Duc and Thanh Duc hamlets,Long Duc commune, Long Phu district, Soc Trang province. Figure 1 showslocation of the plant, intake and outlet of cooling water, areas of calculating flowand temperature spread of water.

Figure 1. Location of the power plant and calculation area.

Calculation gird includes 123 horizontal lines, 45 vertical lines, total 5535 nodesin calculation data. Step in the vertical line is approximately 50m, step in thehorizontal line is approximately 40m. Based on data on longitudinal section,depth of river was interpolated and shown in Figure 2. Figure 3 shows shape ofcross sections of designed outlet (node 21, 22) and outlet after ash disposal area(node 38, 39).


App 6-2

According to Reports on environmental status of Cuu Long River Delta andSouth-east Vietnam - Southern of Institute for Water Resources planning,elevation of the power plant is 1-1.5m, average temperature of river water is 28-30oC, and it is 31-32C in dry season. Relative humidity is about 85%. Averagewind velocity is 5.4km/hour or 1.5m/s. According to Master plan of Cuu LongRiver Delta Project, April is driest month in year. In dry season, tide of East Seacan influence to Phnom Penh by average volume of 10,000m3/s, meanwhilevolume from upstream into Hau river is 1,500-1,600 m3/s. Tidal flow of theserivers is influenced by semidiurnal tide regime of East Sea. In April, highest tidalwater level can be 1.6m, lowest tidal water level can be -2.2m, and amplitude ofoscillation can be up to 3.8m. Table 1 shows data on water levels following tidalflow and flow regime in calculation area, and Table 2 shows average velocity offlow in outlet.

Table 1. Average water level in 5 consecutive days

Hour S C S C S C S C S C1 -1.67 0.61 -1.76 -0.19 -2.03 -0.16 -1.64 0.08 -0.90 0.20

2 -1.02 0.91 -1.79 -0.25 -2.21 -0.45 -1.97 -0.42 -1.29 -0.31

3 0.14 1.18 -1.20 -0.04 -1.97 -0.66 -2.21 -0.78 -1.61 -0.69

4 0.97 1.30 -0.07 0.35 -1.05 -0.75 -2.21 -1.05 -1.85 -1.02

5 1.45 1.15 0.76 0.56 -0.04 -0.69 -1.64 -1.14 -1.76 -1.26

6 1.59 0.79 1.27 0.44 0.67 -0.42 -0.54 -0.93 -0.99 -1.23

7 1.42 0.38 1.51 0.08 1.15 -0.13 0.32 -0.28 0.08 -0.75

8 1.06 -0.01 1.54 -0.31 1.42 -0.01 0.88 0.38 0.82 0.17

9 0.73 -0.39 1.30 -0.69 1.48 -0.19 1.21 0.67 1.27 0.79

10 0.50 -0.78 0.82 -1.05 1.27 -0.54 1.33 0.53 1.45 1.00

11 0.41 -1.17 0.35 -1.40 0.79 -0.93 1.18 0.02 1.33 0.76

12 0.44 -1.49 0.02 -1.73 0.26 -1.29 0.67 -0.48 0.85 0.17


App 6-3

Figure 2. Terrain of river bed in calculation area


App 6-4

Figure 3. Shape of cross section in outlet area


App 6-5

Table 2. Average velocity of flow (m/s) in 5 consecutive days

Hour S C S C S C S C S C1 0.55 0.52 0.58 0.55 0.58 0.57 0.58 0.55 0.53 0.55

2 0.53 0.50 0.55 0.53 0.55 0.55 0.58 0.58 0.57 0.58

3 0.49 0.46 0.51 0.50 0.53 0.53 0.55 0.56 0.56 0.56

4 0.45 0.45 0.45 0.44 0.48 0.48 0.50 0.53 0.53 0.53

5 0.48 0.53 0.49 0.50 0.46 0.44 0.45 0.48 0.48 0.48

6 0.50 0.55 0.54 0.53 0.53 0.49 0.49 0.46 0.47 0.46

7 0.54 0.57 0.56 0.57 0.58 0.55 0.55 0.53 0.51 0.53

8 0.53 0.58 0.55 0.57 0.57 0.58 0.58 0.56 0.58 0.56

9 0.50 0.51 0.50 0.53 0.55 0.55 0.58 0.56 0.58 0.56

10 0.44 0.48 0.46 0.46 0.50 0.50 0.53 0.53 0.53 0.53

11 0.50 0.55 0.50 0.50 0.44 0.45 0.49 0.46 0.49 0.46

12 0.53 0.59 0.53 0.58 0.53 0.50 0.48 0.48 0.48 0.48

2. FLOW OF HAU RIVER IN PROJECT AREA

Hydraulic calculation of flow was carried out in dry season for 02 scenarios: tiderising was at 1.59m (peak) and low tide with minimum current velocity was 0.35m/s. Heat will be dispersed adjacent to grid node No. 21, 22 and 38, 39. Waterand current velocity will be simulated during 120 continuously calculated hourscorresponding to these scenarios and showed in Figure 4, 5 where blue linesindicate water level or velocity and red dots indicate hourly data.According to input data, maximum velocity of current reaches 0.5 m/s and waterlevel from (- 2.22m) to (+ 1.59m). Figure 4 showed that distance between lowesttide and peak tide in every time-step was uneven. The current velocity field atdischarge point of Alternative 1 is showed in Figure 5.a and 5.b. The results areadequate to formerly study of hydraulic regime of rivers and estuaries in CuuLong river delta as: Report on Environmental Status of Cuu Long river delta andEastern South - Southern of Institute For Water Resources Planning – HCM City2004 and Proceedings of the International Workshop - The Mekong Delta –Thailand 1998.


App 6-6

Figure 4. Water levels at the node in 120 consecutive hours of 5 days in April


App 6-7

Figure 4. Velocities at the node in 120 consecutive hours of 5 days in April


App 6-8

Figure 5.a Velocity field in outlet area,when river tide rises to zero (Hon Dau landmark)


App 6-9

Figure 5.b Velocity field in outlet area,when river tide rises to zero (Hon Dau landmark)


App 6-10

3. HEAT DISPERSION FROM COOLING WATER OF LONG PHUTHERMAL POWER COMPLEX (WITH TOTAL COOLING WATERFLOW OF 205m3/s)The warm water will be discharged by drainage canal, so there is a partial loss ofits thermal energy due to exchange with conduit wall, conduit bed and its surfacespreading. In accordance with Raudkivi (1979), the loss of heat due to heatexchanging with environment [1, page of 560] is determined:

Esat = 0.85*4.596*exp(17.27*27.5/[237.3+27.5]) = 23.480982 mmHg

On the other hand, saturation vapour pressure (Es) correspond to mean seawatertemperature is 290C, the surface temperature of warm water is 80C and itspressure is:

Esvp = 4.596*exp(17.27*37/[237.3+37]) = 47.215209 mmHg

Length of reinforced concrete culvert from Long Phu 1 TPP to discharge pointwhich was measured on design drawing is about 2,200m.The loss of heat, according to Dalton [1, page of 564-581], dependens on ratecoefficient of Bowen and statistical function with mean wind (w):

Je = - k*f(w)*(Esvp-Esat) = –1587.107 Joule/m2/s

As heat balance principle, with discharge flow, the designed warm waterdischarge pipe, the heat loss of warm water will be estimated in outlet:

δT = 6450*J/(15.84*24*3600*998.2*4182) = -2.135OC

In which: specific weight of water equals 998.2 kg/m3, and its heat capacity is4,182 J/(kg.0C). Apart from heat exchanging with environment, there is also themixing diffusion in the sea bed, the area of the heat exchanging surface, the heatdispersion due to t

he eddy turbulence and advection.Heat conduction coefficient Q0 at discharge point, Q0 = 530cal/m2/s and Q1 =13cal/m2sOC. Results of simulation of heat dispersion for 6 scenarios are showedas below:


App 6-11

Table 3. Heat transfer distribution in nodes with 205m3/s of volume of cooling waste,6m of discharge depth, 80m far from riverside, when river tide rises to tide topNode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

21 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

23 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

24 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

25 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

26 0.00 0.04 0.06 0.00 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

27 0.00 0.11 0.15 0.12 0.07 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

28 0.05 0.15 0.18 0.18 0.16 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

29 0.10 0.21 0.24 0.30 0.20 0.12 0.06 0.03 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

30 0.16 0.26 0.28 0.37 0.25 0.21 0.12 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

31 0.20 0.33 0.35 0.45 0.32 0.27 0.18 0.13 0.08 0.04 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

32 0.25 0.40 0.43 0.52 0.40 0.38 0.30 0.21 0.12 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

33 0.32 0.48 0.51 0.63 0.48 0.45 0.37 0.29 0.22 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

34 0.40 0.56 0.62 0.75 0.55 0.54 0.45 0.35 0.25 0.16 0.07 0.05 0.00 0.00 0.00 0.00 0.00 0.00

35 0.48 0.67 0.74 0.88 0.65 0.64 0.52 0.41 0.29 0.20 0.11 0.08 0.04 0.00 0.00 0.00 0.00 0.00

36 0.58 0.75 0.86 0.94 0.76 0.75 0.63 0.49 0.35 0.27 0.18 0.14 0.06 0.02 0.00 0.00 0.00 0.00

37 0.70 0.80 0.94 1.08 0.89 0.84 0.75 0.61 0.46 0.38 0.30 0.23 0.09 0.05 0.00 0.00 0.00 0.00

38 0.83 0.93 1.08 1.24 1.03 0.98 0.88 0.72 0.54 0.47 0.38 0.29 0.15 0.08 0.03 0.00 0.00 0.00

39 0.89 1.03 1.24 1.44 1.17 1.24 1.08 0.90 0.67 0.56 0.45 0.36 0.28 0.19 0.10 0.00 0.00 0.00

40 1.03 1.18 1.37 1.47 1.32 1.30 1.16 0.98 0.73 0.63 0.52 0.44 0.35 0.27 0.18 0.00 0.00 0.00

41 1.19 1.33 1.51 1.56 1.47 1.36 1.24 1.05 0.79 0.68 0.58 0.49 0.41 0.32 0.24 0.05 0.00 0.00

42 1.27 1.41 1.60 1.65 1.55 1.43 1.30 1.11 0.85 0.74 0.63 0.55 0.46 0.38 0.30 0.09 0.00 0.00

43 1.36 1.50 1.69 1.84 1.63 1.51 1.36 1.18 0.92 0.81 0.69 0.60 0.51 0.42 0.33 0.12 0.00 0.00

44 1.39 1.55 1.78 1.88 1.71 1.63 1.43 1.27 0.99 0.87 0.75 0.65 0.56 0.46 0.37 0.18 0.00 0.00

45 1.43 1.61 1.88 1.91 1.80 1.67 1.47 1.31 1.12 1.00 0.88 0.77 0.67 0.56 0.45 0.26 0.00 0.00

46 1.61 1.78 2.08 1.98 1.95 1.72 1.52 1.35 1.15 1.03 0.91 0.80 0.70 0.59 0.49 0.29 0.00 0.00

47 1.70 1.87 2.15 2.04 2.04 1.77 1.56 1.41 1.18 1.06 0.94 0.83 0.73 0.63 0.52 0.33 0.06 0.00

48 1.80 1.96 2.22 2.12 2.10 1.82 1.61 1.47 1.26 1.14 1.01 0.90 0.79 0.68 0.58 0.39 0.10 0.00

49 1.90 2.06 2.31 2.23 2.17 1.89 1.68 1.55 1.34 1.21 1.08 0.97 0.85 0.74 0.63 0.44 0.14 0.00

50 2.00 2.16 2.39 2.33 2.25 1.96 1.75 1.62 1.42 1.28 1.13 1.02 0.91 0.80 0.69 0.49 0.20 0.00

51 2.06 2.25 2.45 2.45 2.33 2.06 1.88 1.73 1.49 1.34 1.19 1.08 0.97 0.86 0.75 0.53 0.25 0.00

52 2.12 2.34 2.56 2.51 2.41 2.14 1.95 1.81 1.58 1.43 1.27 1.15 1.03 0.91 0.79 0.58 0.29 0.00

53 2.23 2.42 2.62 2.60 2.48 2.22 2.03 1.87 1.68 1.52 1.36 1.23 1.10 0.96 0.83 0.62 0.36 0.00

54 2.33 2.50 2.71 2.67 2.56 2.30 2.12 1.93 1.71 1.55 1.39 1.25 1.12 0.99 0.86 0.64 0.43 0.00

55 2.40 2.57 2.78 2.75 2.67 2.45 2.24 2.04 1.75 1.58 1.41 1.28 1.15 1.01 0.88 0.67 0.46 0.00

56 2.47 2.64 2.83 2.80 2.75 2.56 2.43 2.12 1.85 1.68 1.51 1.36 1.22 1.08 0.93 0.73 0.52 0.12

57 2.61 2.77 2.96 2.94 2.82 2.67 2.51 2.27 2.02 1.81 1.61 1.46 1.32 1.18 1.03 0.81 0.58 0.27

58 2.72 2.91 3.10 3.11 2.91 2.75 2.60 2.37 2.14 1.93 1.73 1.57 1.42 1.27 1.11 0.88 0.64 0.30

59 2.96 3.46 3.95 3.48 3.00 2.84 2.69 2.47 2.25 2.05 1.85 1.69 1.52 1.36 1.19 0.94 0.70 0.34

60 3.03 3.75 4.47 3.70 3.05 2.88 2.72 2.49 2.27 2.06 1.86 1.70 1.53 1.37 1.21 0.96 0.73 0.38

61 3.11 4.04 4.98 3.91 3.10 2.92 2.75 2.51 2.28 2.07 1.86 1.71 1.55 1.39 1.23 0.98 0.71 0.36

62 3.08 3.97 4.85 3.81 3.08 2.90 2.73 2.49 2.25 2.06 1.86 1.70 1.53 1.37 1.20 0.96 0.59 0.32

63 2.79 3.54 4.29 3.73 3.02 2.86 2.70 2.40 2.09 1.87 1.65 1.49 1.34 1.18 1.03 0.81 0.48 0.28

64 2.50 3.12 3.74 3.65 2.95 2.82 2.68 2.31 1.93 1.68 1.43 1.28 1.14 1.00 0.86 0.67 0.37 0.11

65 1.93 2.43 2.93 3.01 2.77 2.57 2.36 2.05 1.74 1.46 1.18 1.06 0.93 0.80 0.68 0.52 0.28 0.06

66 1.63 2.20 2.77 2.81 2.46 2.31 2.16 1.87 1.58 1.29 1.00 0.89 0.77 0.65 0.53 0.40 0.19 0.00

67 1.32 1.96 2.60 2.61 2.15 2.05 1.96 1.69 1.42 1.13 0.83 0.72 0.60 0.49 0.38 0.29 0.00 0.00

68 1.12 1.48 1.83 1.75 1.51 1.36 1.22 1.05 0.93 0.74 0.53 0.44 0.34 0.25 0.15 0.08 0.00 0.00

69 0.86 1.09 1.32 1.19 0.96 0.81 0.65 0.59 0.53 0.39 0.24 0.18 0.12 0.06 0.00 0.00 0.00 0.00

70 0.54 0.67 0.80 0.75 0.59 0.50 0.40 0.33 0.26 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

71 0.29 0.40 0.50 0.48 0.34 0.24 0.14 0.07 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

72 0.14 0.22 0.25 0.23 0.11 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

73 0.00 0.07 0.08 0.10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

74 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

75 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00


App 6-12

Table 4. Heat transfer distribution in nodes with 205m3/s of volume of cooling waste,6m of discharge depth, 80m far from riverside, when river tide rises from tide bottom

to zeroNode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

51 0.11 0.18 0.20 0.16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

52 0.34 0.37 0.40 0.37 0.24 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

53 0.43 0.53 0.64 0.62 0.48 0.37 0.27 0.14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

54 0.68 0.81 0.94 0.89 0.73 0.63 0.54 0.46 0.39 0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

55 1.00 1.23 1.46 1.33 1.10 0.94 0.79 0.73 0.67 0.52 0.37 0.28 0.19 0.00 0.00 0.00 0.00 0.00

56 1.26 1.61 1.97 1.89 1.74 1.50 1.26 1.09 0.93 0.80 0.67 0.57 0.47 0.28 0.14 0.00 0.00 0.00

57 1.36 1.85 2.35 2.31 2.01 1.84 1.67 1.46 1.24 1.03 0.81 0.71 0.61 0.40 0.28 0.16 0.00 0.0058 1.46 2.09 2.73 2.74 2.28 2.19 2.09 1.82 1.56 1.26 0.96 0.85 0.74 0.51 0.42 0.33 0.00 0.00

59 1.95 2.46 2.97 3.05 2.81 2.60 2.39 2.07 1.76 1.48 1.20 1.07 0.95 0.69 0.54 0.38 0.12 0.00

60 2.52 3.14 3.77 3.68 2.99 2.85 2.71 2.33 1.95 1.70 1.44 1.30 1.16 0.87 0.68 0.49 0.27 0.00

61 2.81 3.56 4.31 3.76 3.04 2.89 2.73 2.42 2.11 1.88 1.66 1.51 1.35 1.04 0.83 0.61 0.28 0.00

62 3.10 3.97 4.85 3.84 3.09 2.92 2.75 2.51 2.27 2.07 1.88 1.71 1.55 1.22 0.97 0.72 0.29 0.00

63 3.14 4.07 5.00 3.95 3.11 2.95 2.79 2.55 2.31 2.10 1.89 1.74 1.58 1.26 1.01 0.76 0.33 0.00

64 3.06 3.78 4.50 3.74 3.08 2.92 2.76 2.53 2.30 2.09 1.89 1.73 1.56 1.24 0.99 0.74 0.32 0.00

65 2.99 3.49 3.85 3.52 3.05 2.89 2.73 2.51 2.28 2.08 1.88 1.72 1.55 1.22 0.97 0.73 0.30 0.0066 2.75 2.93 3.10 3.11 2.87 2.66 2.50 2.25 2.00 1.81 1.61 1.46 1.32 1.03 0.81 0.58 0.25 0.00

67 2.70 2.87 3.05 3.06 2.85 2.63 2.46 2.22 1.98 1.78 1.59 1.44 1.30 1.01 0.80 0.58 0.23 0.00

68 2.64 2.85 2.99 3.00 2.80 2.54 2.36 2.13 1.90 1.72 1.54 1.39 1.25 0.96 0.76 0.55 0.17 0.00

69 2.50 2.67 2.85 2.87 2.61 2.44 2.28 2.06 1.84 1.64 1.44 1.31 1.18 0.91 0.70 0.49 0.10 0.00

70 2.43 2.60 2.78 2.81 2.52 2.33 2.13 1.96 1.78 1.60 1.42 1.28 1.15 0.89 0.67 0.46 0.00 0.00

71 2.36 2.53 2.70 2.74 2.44 2.26 2.08 1.89 1.71 1.55 1.39 1.26 1.13 0.86 0.65 0.43 0.00 0.00

72 2.26 2.45 2.65 2.63 2.36 2.19 2.03 1.82 1.61 1.46 1.30 1.18 1.06 0.82 0.61 0.39 0.00 0.00

73 2.15 2.37 2.59 2.52 2.28 2.10 1.93 1.72 1.52 1.37 1.22 1.11 1.00 0.78 0.56 0.35 0.00 0.0074 2.03 2.19 2.36 2.41 2.20 2.01 1.83 1.60 1.37 1.24 1.11 1.00 0.88 0.66 0.47 0.28 0.00 0.00

75 1.93 2.09 2.26 2.37 2.13 1.93 1.73 1.51 1.29 1.17 1.04 0.93 0.82 0.61 0.41 0.21 0.00 0.00

76 1.83 1.99 2.15 2.32 2.07 1.85 1.64 1.42 1.21 1.09 0.97 0.86 0.76 0.55 0.34 0.13 0.00 0.00

77 1.73 1.90 2.07 2.24 1.97 1.76 1.55 1.36 1.18 1.06 0.94 0.83 0.73 0.52 0.29 0.07 0.00 0.00

78 1.64 1.81 1.98 2.15 1.87 1.66 1.46 1.30 1.15 1.03 0.91 0.80 0.70 0.48 0.24 0.00 0.00 0.00

79 1.55 1.73 1.90 2.03 1.78 1.60 1.42 1.25 1.09 0.96 0.84 0.74 0.64 0.44 0.22 0.00 0.00 0.00

80 1.46 1.64 1.83 1.91 1.68 1.54 1.39 1.21 1.02 0.90 0.78 0.68 0.59 0.40 0.20 0.00 0.00 0.00

81 1.42 1.58 1.74 1.81 1.59 1.46 1.33 1.14 0.95 0.84 0.72 0.63 0.54 0.36 0.18 0.00 0.00 0.0082 1.39 1.53 1.66 1.72 1.50 1.39 1.27 1.08 0.88 0.77 0.66 0.58 0.49 0.33 0.17 0.00 0.00 0.00

83 1.30 1.44 1.58 1.63 1.47 1.33 1.19 1.01 0.82 0.71 0.61 0.52 0.44 0.27 0.14 0.00 0.00 0.00

84 1.22 1.36 1.50 1.54 1.44 1.27 1.11 0.93 0.76 0.66 0.55 0.47 0.38 0.21 0.11 0.00 0.00 0.00

85 1.06 1.21 1.35 1.40 1.27 1.12 0.97 0.83 0.70 0.59 0.48 0.39 0.30 0.11 0.06 0.00 0.00 0.00

86 0.92 1.06 1.20 1.27 1.11 1.01 0.91 0.75 0.65 0.54 0.44 0.35 0.25 0.00 0.00 0.00 0.00 0.00

87 0.86 0.96 1.06 1.11 0.97 0.87 0.78 0.64 0.59 0.49 0.40 0.30 0.20 0.00 0.00 0.00 0.00 0.00

88 0.73 0.83 0.92 0.97 0.91 0.78 0.66 0.52 0.49 0.41 0.33 0.25 0.17 0.00 0.00 0.00 0.00 0.00

89 0.61 0.70 0.79 0.89 0.78 0.67 0.55 0.42 0.38 0.30 0.21 0.16 0.11 0.00 0.00 0.00 0.00 0.0090 0.51 0.59 0.68 0.77 0.66 0.57 0.48 0.36 0.28 0.20 0.11 0.08 0.06 0.00 0.00 0.00 0.00 0.00

91 0.43 0.51 0.58 0.65 0.55 0.48 0.41 0.27 0.25 0.12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

92 0.35 0.43 0.51 0.54 0.48 0.41 0.33 0.17 0.12 0.06 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

93 0.28 0.36 0.43 0.46 0.39 0.30 0.21 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

94 0.23 0.29 0.35 0.38 0.33 0.22 0.10 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

95 0.19 0.24 0.28 0.31 0.21 0.11 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

96 0.11 0.17 0.23 0.21 0.09 0.05 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

97 0.00 0.10 0.19 0.18 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0098 0.00 0.05 0.10 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

99 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

100 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00


App 6-13

Figure 6a. Contour line on temperature with 205m3/s of volume of cooling waste, 6mof discharge depth, 80m far from riverside, when river tide rises to tide top


App 6-14

Figure 6b. Temperature section with 205m3/s of volume of cooling waste, 6m ofdischarge depth, 80m far from riverside, when river tide rises to tide top


App 6-15

Figure 7a. Contour line on temperature with 205m3/s of volume of cooling waste, 6m ofdischarge depth, 80m far from riverside, when river tide rises from tide bottom to zero


App 6-16

Figure 7b. Temperature section with 205m3/s of volume of cooling waste, 6m ofdischarge depth, 80m far from riverside, when river tide rises from tide bottom to zero

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