environmental impact assessment report notice and...142, ida, phase-ii, cherlapally hyderabad–500...

ENVIRONMENTAL IMPACT ASSESSMENT REPORT

FOR

ANDAMAN & NICOBAR DUAL FUEL POWER PROJECT

(55 MW) AT HOPE TOWN

IN FERRARGUNJ TEHSIL IN SOUTH ANDAMAN DISTRICT,

ANDAMAN & NICOBAR ISLANDS

Prepared by :

M/s. NTPC Vidyut Vyapar Nigam Limited (NVVNL), (A wholly owned subsidiary of NTPC)

Project Proponent

Vimta Labs Ltd. 142, IDA, Phase-II, Cherlapally

Hyderabad–500 051 [email protected], www.vimta.com

(NABL Accredited and ISO 17025 Certified Laboratory,Recognized by MoEF&CC, New Delhi)

February, 2020

EXECUTIVE SUMMARY

Draft Environmental Impact Assessment Report for

Andaman & Nicobar Dual Fuel Power Project (55 MW) at Hope Town

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Executive Summary VIMTA Labs Limited, Hyderabad

1.0 SUMMARY AND CONCLUSIONS

M/s. NTPC Vidyut Vyapar Nigam Limited (NVVNL), (A wholly owned

subsidiary of NTPC) proposes to construct Andaman & Nicobar Dual Fuel Project

of 55 MW capacity at Hope Town in Ferrargunj Tehsil in South Andaman District,

Andaman & Nicobar Islands.

1.1 Purpose of the Report

As per the Environmental Impact Assessment (EIA) Notification dated 14th

September, 2006 and its amendment thereafter, construction of thermal power

plant (>=50 Pet coke diesel and all other fuels) Dual Fuel Power Project of 55 MW

falls under category ‘A’ project Schedule 1(d) and requires Environmental

Clearance (EC) to be obtained from MOEF&CC before the commencement of

ground activity.

Application for approval of Terms of Reference (TOR) for carrying out EIA study

for the proposed Dual Fuel (Re-gasified Liquefied Natural Gas (RLNG) & Diesel)

based power plant of 50 MW capacity at Hope Town, Port Blair, Andaman and

Nicobar Islands was submitted to MOEF&CC on 30.10.2018 and request for

change in capacity for 55 MW was submitted on 14.11.2018.

MOEF&CC vide letter No. J-13012/14/2018-IA II (T) dated 02.08.2019 and its

amendment dated 22.10.2019 & 29.01.2020 accorded the Terms of Reference

(TOR) for carrying out EIA study.

This EIA report has been prepared for assessing the environmental impacts due

to the proposed green field dual fuel (RLNG & HSD) power project and to obtain

Environmental Clearance (EC) from MOEF&CC after public consultation. This

report will be made available to public for comments and concerns. Public hearing

will be conducted through Andaman & Nicobar Pollution Control Committee

(ANPCC) and the Final EIA report will be prepared by further upgrade of the Draft

EIA Report on the basis of public consultation

Vimta Labs Limited, Hyderabad, an accredited agency with Quality Council of

India (QCI) / National Accreditation Board of Education and Training (NABET) vide

Certificate No. NABET/EIA/1720/SA 088 valid up to 19.11.2020 has been

engaged by NVVN to undertake an Environmental Impact Assessment (EIA) study

and preparation of Environment Management Plan (EMP) on various

environmental components, which may be affected due to the impacts arising out

of the proposed duel fuel based power plant.

1.2 Environmental Setting

The project site is located in Hope Town at Ferrargunj Tehsil in South Andaman

District of Andaman & Nicobar Islands. The project site is located at a distance of

3.1 km in N direction from Port Blair city and 4.5 km in NNW direction from Veer

Savarkar International Airport. The highway NH-223 is at a distance of 8.4 km in

WNW direction from the proposed site. The site can be approached from coastal



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road linking Bamboo Flat & Hope Town and through Water Ways. The entire

project area falls in Survey of India (SOI) Toposheet No. C46C10 (87 A/10). The

study area of 10 km radius from the project boundary falls in Survey of India

(SOI) Toposheet No. C46C9 (87 A/9), C46C10 (87 A/10), C46C13 (87 A/13) and

C46C14 (87 A/14).

The environmental setting of the site is given in Table-1. The location map of the

project is shown in Figure-1.

TABLE-1

ENVIRONMENTAL SETTING OF THE SITE

Sr. No Particulars Details

1 LNG FSRU Facility and Power Plant Facilities

Village Hope Town

Tehsil Ferrargunj

District South Andaman

State Union Territory : Andaman & Nicobar Island

2 Geological co-ordinates The corner coordinates are given in Table below:

Sr.

No

Latitude Longitude

1 11°41’47.77” N 92°43’38.65” E

2 11°41’43.82” N 92°43’40.93” E

3 11°41’43.23” N 92°43’40.03” E

4 11°41’43.59” N 92°43’39.22” E

5 11°41’46.15” N 92°43’37.43” E

6 11°41’47.53” N 92°43’37.20” E

3 Elevation above MSL Maximum: 11 m MSL Minimum: 4 m MSL

4a Climatic conditions

As per IMD-Port Blair

Annual Maximum Temp: 32.20C;

Annual Minimum Temp: 21.30C; and Annual Rainfall: 2917.5 mm.

4b Site specific data March-September

2019

Parameters Pre-monsoon

Monsoon Post-monsoon

Temperature ºC 21.1-34.5 20.5-34.0 26.2–32.1

Rainfall (mm) 226.8 2000 355.0

Humidity (%) 36-96 67-98 65 – 90

5 Nearest highway NH-223 (8.4 km, WNW).

6 Nearest railway station Nil.

7 Nearest airport Veer Savarkar International Airport (4.5 km, SSE).

8 Nearest Town/City Hope Town (0.3 km, NW); and Port Blair (3.1 km, SSE).

9 Nearest water bodies Bay of Bengal (Adjacent).

10 Reserve / Protected forest

Mount Harriet Shoal Bay RF (0.7 km, N); Mangrove Swamp (2.5 km, WNW); Namunaghar PF (2.8 km, SW); Port Mouat Brindaban RF-II (4.5 km, WNW);

Port Mouat Brindaban RF-I (5.1 km, W);

Jirkatang RF (5.6 km, NW); South Andaman RF (8.5 km, N); Birch Ganj PF (8.6 km, SSE); and Port Mouat PF (9.1 km, SW).

11 Other historical and Cellular jail (3.1 km, SE)



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Sr. No Particulars Details

archaeological places

12 Ecology sensitive/ Protected areas as per Wild Life Protection Act 1972 (National Park/ Wild life Sanctuary/

Bio-sphere reserves)

Mt. Harriet National Park (3.4 km, NNE); Snake Island-I (7.0 km, SSE); Snake Island-II (7.1 km, SSE); and Loha Barrack crocodile sanctuary (11.2 km, SW).

13 Defence installations Navy's Floating Dry Dock (2.8 km, SW); and Air force Station Prothrapur (9.0 km, S).

14 List of Industries Chatam Saw Mill (0.8 km, SSW); and

Surya Chakra Power Corporation Ltd (1.5 km, NW).

15 Seismic zone Zone-V as per IS 1893, Part-I: 2002. Note: All distances mentioned are aerial distances



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FIGURE-1

STUDY AREA MAP (10 KM RADIUS)



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1.3 Brief Description of Project

1.3.1 Nature of the Project

The capacity of the proposed project would be 55 MW. The power plant will work on

dual fuel technology i.e. through Liquid Natural Gas (LNG) or High Speed Diesel

(HSD).

The Dual Fuel Technology enables reciprocating engine to operate on either LNG or

HSD. Switching between fuels can take place seamlessly during operation, without

loss of power or speed. The engines are designed to have the same output

regardless of the fuel used. The major components of Dual Fuel Power Project are

as follows:

1. Engine and its Auxiliaries

2. Alternators, Transformers and Switchyard

3. Control and Instrumentation Systems

4. Air Pollution Control Systems

5. Water Intake and Treatment Systems

6. Auxiliary Cooling System

7. Fuel Oil Handling and Storage System

8. Site Drainage, Effluent Treatment Systems with facilities for recycle and reuse

1.4 Salient Features

The salient features of the proposed power project are given in Table-2.

TABLE-2

SALIENT FEATURES OF PROPOSED POWER PLANT

Sr. No. Particulars Details

1 Capacity of the Plant 55 MW Greenfield project (Dual Fuel Power Project)

2 Total area of the plant At Hope Town Site, about 2 acres of undulated barren land having irregular topography with elevation of 2 m above MSL exists along the Sea Shore.

3 Location of the Plant The project site is located in Hope Town at Ferrargunj Tehsil in South Andaman District of Andaman & Nicobar Islands.

4 Fuel Liquefied Natural Gas (LNG) or High Speed Diesel (HSD).

A Source of Fuel LNG required for 55 MW Dual Fuel Power Project is proposed to be met from Gas Supply Infrastructure being developed at Hope Town. HSD requirement for the power project is to be met from M/s. Indian Oil Corporation Ltd (IOCL)’s existing Oil Depot.

B Fuel Transportation LNG through pipeline and HSD by road

C Fuel Requirement Annual requirement of Fuels when operating on LNG LNG – 0.065 MMTPA HSD – 780 KLPA Requirement of Fuels when operating on HSD alone HSD – 11,000 Kg/Hr LNG will be stored in storage tank of capacity 7500 m3 (Sufficient for 15-20 days). HSD will be stored in 02 (Two) Storage tank of capacity 700 m3

D Expected calorific value range

LNG: Min.- 8994 kcal/Sm3; Max.- 10508 kcal/Sm3 HSD: HHV- 10800 kcal/kg; LHV- 10470 kcal/kg



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Sr. No. Particulars Details

5 Water Requirement About 8 KL/day of fresh water is required to meet the requirement of Plant Cooling Water System & Service Water System.

A Source of water Through desalination plant is proposed to draw 25 KL/day of water from sea.

B Cooling Water System Engine cooling system consisting of Engine driven cooling water pump, HT & LT Pumps (5 Nos. of Sets)

6 Discharge Marine discharge

7 Wastewater Treatment Construction of Water Pump House, Chemical house plant & other associated works. 2 Pumps having Capacity of 2 m3/hr

8 Fire Fighting System Adequate fire fighting systems as per Tariff Advisory Committee (TAC) and OISD guidelines will be provided. Fire water tank of 2 No. with 700 m3 effective capacity each (MS Construction)

9 Noise Levels Equipment are designed to conform to prescribed noise levels [<90 dB(A)]

10 Cost of the Project Rs. 401.65 Crores (as of 1st quarter of 2018)

Source: Feasibility Report

1.5 Resource Requirement

Land Requirement

The proposed site is located at Hope Town, A&N which is about 2 acres of polygon

shaped. The topography of the project site is waste and barren land (Survey No-

41) having irregular topography, along the seashore. The Site is having an

elevation of 2 meters above MSL is flanked between Sea on front side & stiff rock

Hill on backside. The top area of hill is reported to be private allotted land. The

power project is proposed to be accommodated within the available land (2 acres)

located in Hope Town, and no additional land is proposed to be acquired.

The land is Government land & is under physical possession of NVVN. No forest

land is involved. Topography of the site is rocky and undulated terrain. The land

is away from the navigational channel & other marine traffic.

Water Requirement & its Source

The water requirement for the proposed project is estimated at around 8 m3/day

(approx. 0.33 m3/hr) and will be required only for makeup for engine cooling,

yard cleaning, potable water and initial filling of fire water tank. As sea water

desalination will be adopted, around 25 m3/day (approx. 1.04 m3/hr) of water will

be drawn from the sea. The project will be provided with sweet drinking water

supply.

Manpower Requirement

A&N Gas project shall be a mechanized and automated plant, therefore, the direct

opportunities for employment during operation phase are limited. However, due to

increased availability of power, the opportunities for self-employment and

business activities shall increase. About 20 employees shall be employed during

operation phase of the project.



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Power Requirement & Source

The requirement of the construction power supply for the project would be met

from the DG sets.

1.6 Process Description

The proposed 55 MW capacity power plant will work on dual fuel technology i.e.

through Liquid Natural Gas (LNG) or High Speed Diesel (HSD). The Dual Fuel

Technology enables reciprocating engine to operate on either LNG or HSD.

Switching between fuels can take place seamlessly during operation, without loss

of power or speed. The engines are designed to have the same output regardless

of the fuel used.

When running in gas mode, the engine works according to the Otto process,

where the Lean Air Fuel Mixture is fed to cylinders during the suction stroke.

When running in diesel mode, the engine works according to the diesel process,

where the diesel fuel is fed to cylinders at the end of compression stroke. At full

load, efficiency of the engine is in the order of 45% for gas fuel & 42% for liquid

fuel. Engines are optimised for running on gaseous fuels as primary fuel and

diesel fuel is used for back-up fuel operation.

1.7 Baseline Environmental Status

The baseline data monitoring studies have been carried out for nine months from

March 2019 to November 2019 representing pre-monsoon season, monsoon &

post-monsoon seasons. The baseline studies are in progress to cover the

remaining seasons.

1.7.1 Meteorology

The meteorological parameters were recorded on hourly basis during the study

period and comprises of parameters like wind speed, wind direction (from 0 to

360 degrees), temperature, relative humidity, atmospheric pressure, rainfall and

cloud cover. The meteorological parameters have been recorded and are

presented in Table-3.

TABLE-3(A)

SUMMARY OF THE METEOROLOGICAL DATA GENERATED AT SITE

Period Temperature

(0C) Relative Humidity

(%) Atmospheric

Pressure (mb) Rainfall (mm)

Max Min Min Max Min Max

March 21.1 34.0 36 96 1007.1 1015.3 118.8

April 24.2 34.5 42 94 1005.2 1013.4 12.6

May 24.7 32.9 60 95 1004.0 1012.4 95.4

Range 21.1 - 34.5 36 – 96 1004.0 - 1015.3 226.8



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TABLE-3(B)

SUMMARY OF METEOROLOGICAL DATA RECORDED AT PROJECT SITE

DURING MONSOON SEASON

Period Temperature (0C)

Relative Humidity (%)

Atmospheric Pressure (mb)

Rainfall (mm)

Min Max Min Max Min Max

June 22.2 34.0 67 96 1003.4 1009.5 284

July 21.4 33.7 79 98 1004.1 1007.2 548

August 20.5 31.8 73 95 1005.8 1011.7 496

September 24.8 30.6 79 97 1007.3 1011.4 672

Range 20.5 – 34.0 67 - 98 1003.4 – 1011.7 2000

TABLE-3(C)

SUMMARY OF METEOROLOGICAL DATA RECORDED AT PROJECT SITE

DURING POST - MONSOON SEASON

Period Temperature (0C)

Relative Humidity (%)

Atmospheric Pressure (mb)

Rainfall (mm)

Min Max Min Max Min Max

October 26.2 31.4 75 90 1003.1 1009.3 181.4

November 27.7 32.1 65 85 1001.8 1006.7 173.6

Range 26.2 – 32.1 65 - 90 1001.8 – 1009.3 355.0

1.7.2 Ambient Air Quality

Eight ambient air quality locations were established in and around project site.

The minimum and maximum concentrations for PM10 were recorded as 14.7 g/m3

and 45.6 g/m3. The minimum and maximum concentrations for PM2.5 were

recorded as 10.8 g/m3 and 26.5 g/m3. The minimum and maximum SO2

concentrations were recorded as 7.7 g/m3 and 18.8 g/m3. The minimum and

maximum NO2 concentrations were recorded as 11.0 g/m3 and 24.1 g/m3.

Parameters Pre-monsoon Monsoon Post-monsoon

PM10 16.5–45.6 14.7-43.8 15.4-44.6

PM2.5 11.1-26.5 10.8-26.4 11.2-24.4

SO2 7.7-16.9 7.9-18.6 10.6-18.8

NO2 11.0-24.1 11.9-23.2 14.8-23.6

All values are in g/m3

The concentrations of PM2.5, PM10, SO2, NO2, O3, CO, NH3, Pb, Hg, BaP, As, Ni and

C6H6 are observed to be well within the MOEF&CC Gazette Notification dated

NAAQS 16.11.2009 for commercial and rural /residential zone.

The concentration can be attributed due to local industrial activities and also due to

ferry movement for transportation, commercial, rural activities and vehicular

traffic. There are no other major industrial activities in the study area.

1.7.3 Land Use

As per Satellite imagery, built-up land comprises of 5.6% of settlements/airport,

total water body land comprises of 45.1% of tank/river/sea/bay etc, forest land



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comprises of 25.8% of dense forest and 1.6 % of mangroves, agricultural land is

about 53.3 %, crop land comprises of 3.4% and total waste land of the study

area comprises of 9.2% of land with scrub, 4.1% of land without scrub, 2.8% of

creek, 1.9% of water logged area and 0.5% of jetty.

1.7.4 Soil Characteristics

It has been observed that the pH of the soil in the study area ranged from 7.21 to

8.44. The electrical conductivity was observed to be in the range of 264 µs/cm to

10800 µs/cm. The nitrogen values range between 156.8 to 312.8 kg/ha. The

phosphorus values range between 48.6 to 178.6 kg/ha. The potassium values

range between 48.6 to 325.6 kg/ha. The chlorides were found to be in the range

of 105.6 to 36598 mg/kg of soil.


pH 7.21-8.12 7.34 to 8.24 7.34 to 8.44

Electrical conductivity (µs/cm) 264-10800 350-9860 426- 9860

Nitrogen (kg/ha) 156.8 -306.8 172.8-312.8 168.4-312.8

Phosphorus (kg/ha) 48.6-164.8 54.6-178.6 62.8-168.5

Potassium (kg/ha) 48.6-325.6 52.4-318.4 64.8-296.5

Chlorides mg/kg 106-36598 138-32562 158-32562

1.7.5 Water Quality

The baseline water quality status in the region is established by analysing

samples at 08 locations consisting of four (04) surface water and four (04) ground

water sources covering 10 km radial distance were examined for physico-

chemical, heavy metals and bacteriological parameters in order to assess the

effect of industrial and other activities on surface and ground water. The ground

and surface water samples were analysed and found that ground water quality is

well within the drinking water quality limits.

Surface Water Quality

The analysis results indicate that the pH values in the range of 6.7 to 7.9. The

TDS was observed in the range of 21,971 mg/l to 34,240 mg/l. The chlorides and

sulphates were found to be in the range of 12420 to 17432 mg/l and 1074.2 to

1520.4 mg/l respectively. The surface water quality does not indicate any industrial

contamination.


PH 6.7-7.3 7.14-7.9 7.4-7.9

TDS (mg/l) 28768- 34240 21971- 27445.8 23923- 26753

Chlorides (mg/l) 15800-17432 12420-15430 13520-15210

Sulphates (mg/l) 1110.6-1398 1074.2-1520.4 1214-1457

Ground Water Quality

The analysis results indicate that the pH ranges in between 6.9 to 8.1, which is well

within the specified standard of 6.5 to 8.5. Total dissolved solids was observed to



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be ranging from 97.7 to 287.6 mg/l. Chlorides were found to be in the range of

51.8 mg/l to 135.2 mg/l and Sulphates were found to be in the range of 5.96 mg/l

to 34.2 mg/l.


pH 6.9-7.6 7.1-7.9 7.3 – 8.1

TDS (mg/l) 97.7-231.9 135.3 – 287.2 144.3 – 287.6

Chlorides (mg/l) 51.8-98.8 69.5 – 135.2 71.2 – 131.2

Sulphates (mg/l) 5.96-29.4 12.8 – 34.2 13.8 – 33.8

1.7.6 Noise Levels

The noise monitoring has been conducted for determination of noise levels at ten

locations in the study area. The day time noise levels at all the locations were

ranged in between 40.1 dB (A) to 55.1 dB (A). The night time noise levels were

ranged in between 32.9 dB (A) to 50.0 dB (A).

Parameters Pre-monsoon Post-monsoon

Day Time dB (A) 43.0-55.1 40.1-52.4

Night Time dB (A) 35.8-50.0 32.9-47.3

Noise monitoring results reveal ambient noise levels in all the locations are well

within the limits as per Ambient Air Quality standards with respect to Noise 2000.

The higher range can be attributed to local industrial and commercial activities.

1.7.7 Flora and Fauna

There are no endangered species found in the core zone of the proposed NVVN dual

fuel based power plant. But the buffer zone is rich in endemic flora and fauna.

Endemic flora is represented such as Dalbergiapaniculoides (Paduak trees,

Mystricaandmanica and Mangiferaandamanica, and such as mangrove associates

and parasitic plants such as Hoya species. Wild ginger, Carissa andamanenisare

native species among those listed in the enumeration of the South Andaman. The

survey in the Mount Harriet National Park was under taken after taken prior permit.

The habitat fragmentation and destruction of the mangrove swamps were observed

near Dundaspoint and near Kantajungle in Dundaspoint, in South Andaman’s and

other creek areas for inland fishing.

1.8 Anticipated Environmental Impacts and Mitigation Measures

1.8.1 Impact on Land Use

The land selected for proposed dual fuel power plant project is an undeveloped

barren land which is categorized as undeveloped area, which will be converted to

industrial area. Since, the land area is small & rocky, there will not be much

impact on land use due to the proposed project.

In addition, the project will be in the socio-economic development of the region.

The project site will not be having any adverse impact on the surrounding land use



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during the operation period. However, the change in land use pattern due to

proposed power project and its secondary effects shall be permanent.

1.8.2 Impact on Soil

The impact on soil during operation of the project could result due to gaseous

emissions and washout of gases (SO2 and NO2) during the rains. The impacts on soil

due to operation of the power plant and gaseous emission are likely to be negligible

as the power plants using R-LNG and Liquid fuel are environmentally clean.

1.8.3 Impact on Air Quality

The impacts on air quality is assessed based on emissions from the proposed 55

MW Dual Fuel Power Project which works on dual fuel technology using R-LNG

and HSD as fuel.

Natural gas being a clean fuel, Sulphur dioxide (SO2) release to atmosphere will

be negligible. In order to keep NOx level within the stipulated limit Dry Low NOx

(DLN) combustion system is envisaged. Emission of particulate matter will also be

negligible. Adequate stack height of 30 m will be provided to suitable disperse the

emissions over a wide area.

The major air pollutants from the proposed power project while using HSD as fuel

are SO2, NOx and CO which are emitted continuously from the stacks (point

sources) attached with gas engines. The impacts on air environment from stacks

depend on the quality of HSD fuel used and can extend to far distances

depending on prevailing meteorological conditions.

Prediction of impacts on air environment has been carried out employing

mathematical model based on a steady state Gaussian plume dispersion model.

The incremental concentrations of the proposed project are super imposed on the

maximum baseline data to arrive at resultant concentrations during operational

phase of the proposed project. The comparisons between four scenario’s resultant

concentrations are given in Table-4.

TABLE-4

RESULTANT CONCENTRATION

Pollutant Baseline (max)

(g/m3)

Incremental Concentration

(g/m3)

Resultant Concentration

(g/m3)

Distance/ Direction

NAAQS Limits (Ecologically

Sensitive Areas) (g/m3)

Scenairo-1 (99% RLNG+ 1% HSD)

SO2 18.8 0.00008 18.80008 1.0 km, NE

80

NOx 24.1 0.34 24.44 80

Scenairo-1A (90% RLNG+ 10% HSD)

SO2 18.8 0.00072 18.80072 1.0 km, NE

80

NOx 24.1 0.51 24.61 80


SO2 18.8 0.00154 18.80154 1.0 km, NE

80

NOx 24.1 0.81 24.91 80


SO2 18.8 0.0030 18.803 1.0 km, 80



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Pollutant Baseline (max)

(g/m3)

Incremental Concentration

(g/m3)

Resultant Concentration

(g/m3)

Distance/ Direction

NAAQS Limits (Ecologically

Sensitive Areas) (g/m3)

NOx 24.1 1.32 25.42 NE 80


SO2 18.8 0.008 18.808 1.0 km, NE

80

NOx 24.1 2.99 27.09 80

The incremental concentrations when superimposed over the existing maximum

baseline concentrations, the resultant concentrations are observed to be within

the permissible levels for residential/rural conditions.

The mitigative measures recommended for control of air pollution in the plant

are:

Adoption of combustion control for NOx (Low NOx burner);

Provision of stack with a height of 30 m each for wider dispersion of gaseous

emissions;

Provision of continuous online flue gas monitors to measure PM, SOx, NOx and

CO as well as flue gas flow rates and temperature measurement shall be

provided for all stacks; and

Asphalting of the roads within the plant area.

1.8.4 Impact on Water Resources

Water Resources

The water requirement for the proposed project is estimated at around 8 m3/day

(approx. 0.33 m3/hr) and will be required only for makeup to engine cooling, yard

cleaning, potable water and initial filling of fire water tank. As sea water

desalination will be adopted, around 25 m3/day (approx. 1.04 m3/hr) of water will

be drawn from the Andaman sea.

Impact on Ground Water

As no ground water is proposed to be used for plant during operation phase,

there will be no impact on ground water resources during operation of the plant.

Impact on Drainage

The proposed power project area is located adjacent to the Andaman sea and

there are no natural drainage streams flowing within the proposed project area.

Andaman and Nicobar Islands is having good amount of rainfall all throughout the

year. Hence, suitable measures for conserving rain water through rain water

harvesting mechanism will be adopted.

The proposed storm water drainage network will be designed in such a way that

there will be no disturbance of natural drainage system. Hence, no major adverse

impact is envisaged on the drainage and hydrology.



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Water Pollution Mitigation Measures

An effluent management scheme, consisting of collection, treatment, recirculation

and disposal of effluents shall be implemented in order to optimize the makeup

water requirement as well as liquid effluent generation. The detail of water

system for the project is described as below:

The filter backwash water of primary treatment plant shall be collected and

recycled back to the DM clarifier;

The treated effluents conforming to the prescribed standards shall be re-

circulated and reused within the plant;

Service water effluents from various areas shall be separately routed to a

sump. From the sump the waste service water shall be pumped up to lamella

clarifier/tube settler for treatment;

Oil water separation system will be provided for oily wastes. Treated service

water shall be sent back to service water tank to the extent possible for re-

use;

Treated effluents shall be collected in Central Monitoring Basin (CMB) and shall

be recycled & re-used /discharged to sea;

An independent plant effluent drainage system shall be constructed so as to

ensure that plant effluents do not mix with storm water drainage;

Efficient operation of various treatment schemes shall be ensured so that the

quality of treated effluent from CMB conforms to relevant standards,

prescribed by regulatory agencies. The treated effluents shall be

recycled/reused to the extent possible and the remaining will be discharge into

sea; and

The sewage from plant shall be treated in a sewage treatment plant. The

treated effluent conforming to prescribed standards shall be utilized for

plantation to the extent possible.

1.8.5 Impact on Marine Environment

The proposed project will be developed on land and no marine waters will be

disturbed. Fisheries is one of the most important aspect as far as coastal

developmental impacts are concerned. Many coastal villages are highly dependent

on the marine fisheries for their livelihood. It has also been seen that many of the

coastal developmental activities may impact the fish community distribution. As

the present construction activity is confined to land side and will be of shorter

duration, the impact will be less significant.

1.8.6 Impact of Solid Waste

As R-LNG and HSD will be used as fuel for the proposed power project, there will

be no generation of solid waste from the power generation process. The general

solid waste generated from the plant employees and contractors will be collected

and segregated in a designated area and will be disposed through authorized

agency.

Further, various hazardous wastes which will be generated during the operation of

the power plant are the waste oil/used oil, lubricants, paints, chemicals, empty



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containers and used batteries. These wastes will impact on the soil, water and

odour if not properly segregated, stored and disposed.

1.8.7 Impact on Noise Levels

The main sources of noise and vibration during operations will be:

Operation of generators and turbine inside the power house; and

Operation of various pumps, fans and motors.

Scheduling deliveries to daytime as much as possible would minimize noise

generation by truck movement. Turbines, cooling towers, transformers,

compressors, pumps, vehicles and miscellaneous equipment during plant

operation, will generate noise. However, proper acoustic enclosures would be

provided to control the noise level within 80 dB (A), as per the requirement of

Occupational Safety and Health Administration Standard (OSHA).

Noise Pollution Mitigation Measures

The noise impact on the surrounding population during the construction phase will

be within the acceptable limits. High noise generating equipment, if used, shall

not be operated during the night to eliminate any possible discomfort to the

nearby residents. Community noise levels are not likely to be affected because of

the vegetation and likely attenuation due to the physical barriers. The following

recommendations shall be implemented:

Provision for insulating caps and aids at the exit of noise source on the

machinery;

The use of damping materials such as thin rubber/lead sheet;

Shielding the work places like compressors, generator shed;

Adoption of shock absorbing techniques to reduce impact;

Provision of inlet and outlet mufflers which are easy to design; and

Provision of earmuffs to the workers and enforcement of its use by the

workers.

1.8.8 Impacts on Socio-Economics

The requirement of unskilled manpower will be met from nearby villages during

construction phase. The proposed project will result in considerable growth of

service sector and will also generate new industrial and business opportunities in

the area. Hence, the project will help in generation of the indirect employment

apart from direct employment. This will also help in reduction of out migration for

employment due to better economic opportunities available in the area.

In addition, migration of person with better education and professional experience

will result in minor increase of population and literacy in the study area. This will

be a positive socio-economic development for the region. There will be a general

upliftment of standard of living in the region.

Department of Fisheries Andaman & Nicobar Administration has informed that

Fishery activities are not being undertaken around proposed site for Dual fuel

power project. However a formal conformation in this regard is being obtained



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from Department of Fisheries and their recommendations if any will be

implemented.

1.9 Environmental Monitoring Program

Post project environmental monitoring is important in terms of evaluating the

performance of pollution control equipment installed in the project. The sampling

and analysis of the environmental attributes will be as per the guidelines of CPCB/

Andaman & Nicobar Pollution Control Committee. The frequency of air, noise,

surface water and ground water sampling and location of sampling are detailed in

Chapter-6.

1.10 Environmental Cost and CER

All the environmental measures shall be integral part of main plant EPC package,

hence item wise cost of Chimney, SCR/SNCR , Effluent control system, emission

and effluent monitoring system are not available individually. However it is

estimated that the cost of environmental protection measures would be about Rs.

25 crores out of total project cost of Rs 401.65 Crores.

In addition to the above budget an amount of Rs 6.02 crores has been envisaged

towards Corporate Environment Responsibility (CER).

1.11 Risk Assessment and Disaster Management Plan

Risk assessment has been carried out to quantify the extent of damage and

suggest recommendations for safety improvement for the proposed expansion

project. Risk mitigation measures based on consequence analysis and engineering

judgments are incorporated in order to improve overall system safety and

mitigate the effects of major accidents.

An effective Disaster Management Plan (DMP) to mitigate the risks involved will be

prepared for proposed power plant. This plan defines the responsibilities and

resources available to respond to the different types of emergencies envisaged.

Training exercises will be held to ensure that all personnel are familiar with their

responsibilities and that communication links are functioning effectively.

1.12 Project Benefits

Commissioning of the proposed Andaman & Nicobar Gas power project will

improve the power supply position in Andaman & Nicobar Islands, which is vital

for economic growth as well as improving the quality of life. The improved power

supply will reduce the dependence of general public and commercial

establishments on DG sets thereby reducing the noise pollution as well as air

pollution at local levels.

Unskilled people and limited skilled people (depending on availability) shall be

hired from local population. People expected to come to the study area from

outside are expected to be educated and specially skilled. In addition, some

secondary developments like opening of new schools, shops may take place in



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view of the increased family population due to the proposed employment. These

factors will be beneficial to locals residing in the study area.

The beneficial impact of proposed power project on the civic amenities will be

substantial after the commencement of project activities. As corporate social

responsibility various activities will be started like welfare for

poor/widows/physically challenged persons. Capacity building programs, sports

events, assistance to government schools, scholarships will be done. For

community development trainings will be provided for woman for self

employment, community toilets, drinking water facilities etc. A separate budget

will be made for these activities during operation of plant. Medical camps/health

awareness camp will be organized in nearby villages.

1.13 Conclusions

The proposed power project would add significant value to the economy of A&N

islands. The project will not only help ensure the island by becoming self-

sufficient in terms of power generation, but will also drive macro-economic

growth.

The proposed project would have minimal impacts on the environment. However,

with proper and judicious implementation of the mitigation and environment

management measures, the impacts can be further minimized and can be

maintained well within the permissible limits specified by the regulatory

authorities.

Thus, it can be concluded that with the strict implementation of the pollution

control and mitigation measures, with proper environment management system

in place the proposed power project will be beneficial to the society and will

contribute to the economic development of the island.

environmental impact assessment report notice and...142, ida, phase-ii, cherlapally hyderabad–500...

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