part i - owners technical specification - re - rev l- 22dec2013

Musandam Power Project

TECHNICAL SPECIFICATION DUAL FUEL ENGINES

Rev L

December 2013

The SKM logo trade mark is a registered trade mark of Sinclair Knight Merz Pty Ltd.

Musandam Power Project

TECHNICAL SPECIFICATION DUAL FUEL ENGINES

Rev L

December 2013

Sinclair Knight Merz 13th Floor, Cale Cross House 156 Pilgrim Street Newcastle upon Tyne NE1 6SU United Kingdom Tel: +44 191 211 2400 Fax: +44 191 211 2401 Web: www.globalskm.com

COPYRIGHT: The concepts and information contained in this document are the property of Sinclair Knight Merz (Europe) Limited. Use or copying of this document in whole or in part without the written permission of Sinclair Knight Merz constitutes an infringement of copyright.

LIMITATION: This report has been prepared on behalf of and for the exclusive use of Sinclair Knight Merz (Europe) Limiteds Client, and is subject to and issued in connection with the provisions of the agreement between Sinclair Knight Merz and its Client. Sinclair Knight Merz accepts no liability or responsibility whatsoever for or in respect of any use of or reliance upon this report by any third party.

Musandam Power Plant Technical Specification

SINCLAIR KNIGHT MERZ PAGE ii

Contents

1. Project Description 1

1.1. General 1 1.2. Role of Technical Specification 1

2. Scope of Work 2

2.1. Summary of scope 2 2.2. Terminal points 6 2.3. Provision of services during construction 10 2.4. Related Projects and excluded Work 11 2.5. Regulatory approvals 11 2.6. Codes and standards 11

3. Plant Design Criteria 13

3.1. General 13 3.2. Generating unit availability criteria 15 3.3. Site and layout 16 3.4. Site conditions 16 3.5. Fuel 19 3.6. Water management system 19 3.7. Cooling water 20 3.8. Environmental criteria 20 3.9. Noise 24 3.10. Risk assessment 26 3.11. HAZOP studies 26 3.12. Table of key dates 27 3.13. Concurrent work 27

4. General Specification 28

4.1. General requirements 28 4.2. Hardware and software 29 4.3. Access and maintenance 29 4.4. Lubrication 29 4.5. Corrosion protection 30 4.6. Insulation 30 4.7. Chemicals 31 4.8. Buildings 31 4.9. Signage 31 4.10. Degree of automation 32


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4.11. Lay-down areas 32 4.12. Design and standardisation 32 4.13. Prohibited materials 33 4.14. Classification of hazardous areas 33 4.15. Hazardous substances and dangerous goods 34 4.16. Drawings and documentation 34 4.17. Labelling 35 4.18. Operations and maintenance manuals 35 4.19. Inventory control management system 38 4.20. Construction program and progress 38 4.21. Places of manufacture and sub-orders 39 4.22. Quality assurance and quality control 39 4.23. Inspection and test plan 40 4.24. Training 42 4.25. Special tools 44

5. Site, Safety and Environmental Protection 45

5.1. The Site, access and use of Site 45 5.2. Site facilities 45 5.3. Security system 46 5.4. Safety 46 5.5. Fire protection and fire fighting 47 5.6. Environmental management, construction and commissi oning 48 5.7. Construction certificates 49 5.8. Cleaning up by EPC Contractor 49

6. Mechanical Specification 50

6.1. Dual fuel engines 50 6.2. Cooling systems 54 6.3. Air starting system 56 6.4. Control/instrument air system 57 6.5. Inlet and exhaust system 58 6.6. Fuel systems 59 6.7. Water system 68 6.8. Black start and emergency diesel equipment 71 6.9. Mechanical building services 73 6.10. Maintenance facilities and equipment 74 6.11. Spare Parts 75 6.12. Fire protection and detection facilities) 75 6.13. General mechanical requirements 76


SINCLAIR KNIGHT MERZ PAGE iv

7. Electrical Specification 80

7.1. General 80 7.2. Cable sizing calculations 81 7.3. Auxiliary supplies 81 7.4. Load flow and fault studies 82 7.5. Transient and dynamic stability studies 82 7.6. Earthing studies 82 7.7. Protection coordination studies 82 7.8. Insulation coordination studies 82 7.9. Lightning protection studies 83 7.10. Generator and excitation system 83 7.11. Generator main connections 85 7.12. Transformers 85 7.13. Metalclad Switchgear 87 7.14. Medium voltage (MV) switchgear 88 7.15. Generator voltage switchgear 88 7.16. Low voltage switchgear 89 7.17. Battery systems 89 7.18. Black Start / Emergency Generator 90 7.19. Uninterruptible power supply (UPS) systems 90 7.20. Protective system 91 7.21. Motors 93 7.22. Earthing 94 7.23. Alarm equipment 95 7.24. Cabling 95 7.25. Lighting and small power installation 99

8. Control System Requirements 101

8.1. General requirements 101 8.2. Codes and standards 101 8.3. Design and operational requirements 101 8.4. Plant control structure 102 8.5. Safety instrumented shutdown systems 103 8.6. Distributed Control System (DCS) 104 8.7. Station clock system 111 8.8. Instrumentation 112 8.9. Valves 114 8.10. Installation requirements 115 8.11. Plant information management system database (PIMS) 116


SINCLAIR KNIGHT MERZ PAGE v

8.12. Plant instrumentation and wiring system database 11 6 8.13. Communication and security systems 116

9. Civil Requirements 120

9.1. General requirements for civil works 120 9.2. Scope of civil works 125 9.3. Design of the works 128 9.4. Specific building and architectural requirements 13 7 9.5. Materials and workmanship 141 9.6. Auxiliary transformer compounds 146

10. Provisional Acceptance 148

10.1. General 148 10.2. Commissioning plans, procedures and programme 148 10.3. Commissioning coordinating group 149 10.4. Commissioning 150 10.5. Testing 150 10.6. Tests on completion 151 10.7. Acceptance Tests 152 10.8. Test records 165 10.9. Changes after completion of Acceptance Tests 165

Appendix A Fuel Specifications 167

Appendix B Data Sheets Guaranteed Data, Performance Data, Desi gn Data and Inputs into the Bid Evaluation Tool 170

Appendix C Drawings and Documentation 248

Appendix D Specification for Metering System 260

Appendix E Plant System Categories for Spare Parts 289


SINCLAIR KNIGHT MERZ PAGE vi

Document history and status Revision Date issued Reviewed by Approved by Date approved Revision type

1 8th Jan 2012 M Arnold G Taylor 8th Jan 2012 Draft

A 23rd Jan 2012 M Arnold G Taylor 23rd Jan 2012 Client review comments incorporated

B 8th Feb 2012 M Arnold G Taylor 8th Feb 2012 Modifications to reflect RFP requirements

C 4th April 2012 M Arnold G Taylor 4th April 2012 Further modifications to reflect MFS, OPWP clarifications and client feedback

D 1st Feb 2013 G Taylor A Green Updated with revised project requirements

E 20th Feb 2013 A Green B Ging Revised with OPWP comments

F 15th March 2013

G Cox A Green 15th March 2013

Updated following Consortium/OPWP comments

G 31st March 2013

William Booker/ OOC

OOC 31st March 2013

Updated following Consortium/OPWP comments

H 13 April 2013 William Booker/ OOC

OOC 13 April 2013 Updated following RAECo/OPWP comments

I 26 April 2013 William Booker/ OOC

William Booker/ OOC

26 April 2013 Updated following Ashurst/OPWP comments

J 05 December 2013

William Booker/OOC

OOC 05 December 2013

OOC Update

K 12 December 2013

William Booker/OOC


OOC Update

L 22 December 2013

William Booker/OOC


OOC Update

Distribution of copies Revision Copy no Quantity Issued to

1 Electronic 1 Oman Oil + LGI

A Electronic 1 Oman Oil + LGI

B Electronic 1 Oman Oil + LGI

C Electronic 1 Oman Oil + LGI

D Electronic 1 Oman Oil + LGI

E Electronic 1 Oman Oil + LGI

F Electronic 1 Oman Oil +LGI+OPWP

G Electronic 1 Oman Oil +LGI+OPWP

H Electronic 1 Oman Oil +LGI+OPWP

I Electronic 1 Oman Oil +LGI+OPWP

J Electronic 1 Oman Oil +LGI

L Electronic 1 Oman Oil +LGI+OPWP

Author: G Taylor / B Rose / B Littlewood / K Zachariah / I Gillan / D Hackwell

Project Manager: A Green

Name of organisation: Oman Oil Company and LGI

Name of project: Musandam Power Plant

Name of document: Technical Specification

Document version: Rev L


SINCLAIR KNIGHT MERZ PAGE vii

Project number: VP01278


SINCLAIR KNIGHT MERZ PAGE viii

Nomenclature Abbreviations and symbols AC Alternating current ACI American Concrete Institute AG Available generation AGC Automatic generation control AISC American Institute of Steel Construction ALARP As low as reasonably practical ANSI American Standards Institute API American Petroleum Institute AQG Air Quality Guidelines ASTM American Society for Testing and Materials AVR Automatic voltage regulator BS British Standard CAD Computer aided drafting CCR Central control room CCTV Closed circuit television CD ROM Compact disc read only memory CEMP Construction environmental management plan CFC Chlorofluorocarbon C&I Control and instrumentation COD Commercial operation date CO2 Carbon dioxide CPF Central processing facility CTs Current transformers CV Calorific value DA Degraded airshed dB(A) decibels (absolute) DC Direct current DCS Distributed control system DF Dual fuel DIN Deutsches Institut fur Normung e.g. for example EAF Equivalent availability factor EIA Environmental impact assessment EN EuroNorm ENMP Environmental noise management plan EPC Engineer procure and construct FMS Fuel Metering Skid FOF Forced outage factor FOH Forced outage hours GCF Gas connection facilities GCPC Guaranteed Contract Power Capacity running on Natural Gas GCPFC Guaranteed Contract Power Capacity running on Fuel Oil GCPUC Guaranteed Gross Contract Power Capacity of each Power Unit running on Natural Gas GCPUFC Guaranteed Gross Contract Power Capacity of each Power Unit running on Fuel Oil GIP Good industrial practice GIS Gas insulated substation GPRS Gas pressure regulating station H2 Hydrogen HAZOP Hazard and operability HHV Higher heating value HMI Human machine interface HSEC Health safety environmental and community HV High voltage (132kV)


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HVAC Heating ventilation and air conditioning IEEE Institute of Electrical and Electronic Engineers IEC International Electrotechnical Commission IFC International Finance Corporation IGEM Institute of Gas Engineers and Managers I/O Input / output IP Ingress protection ISDN Integrated services digital network ISO International Organization for Standardization L Length LED Light emitting diode LFO Light Fuel Oil LHV Lower heating value LMT Local mean time LOLH loss of load hours LOLP Loss of load probability LNTP Limited notice to proceed LV Low voltage (below 1kV) MECA Ministry of the Environment and Climate Affairs MCC Motor control centre MDQ Maximum Daily Quantity MGP Musandam Gas Plant MFS Minimum Functional Specification MN Methane number MSL Mean sea level MV Medium Voltage (11-15kV) N Quantity NDA Non-degraded airshed NDIR Non dispersive infrared indicator NDT Non destructive testing NFPA National Fire Protection Association NG Natural Gas NGSA Natural Gas Supply Agreement NOx Oxides of Nitrogen NPSH Net positive suction head NTP Notice to proceed OLTC On-load tap changer OOCEP Oman Oil Exploration and Production Company OEM Original equipment manufacturer O&M Operation and maintenance OPC Open connectivity O2 Oxygen PABX Private automatic branch exchange PC Personal computer PCB Poly chlorinated biphenyl PD Published document PFD Process flow diagram PDF Portable document format PH Period hours PIMS Plant information management system P&ID Process and instrumentation diagram PLC Programmable logic controller PM Particle matter RAEC Rural Areas Electricity Company SAOC RCD Residual current device RDC RAEC load dispatch RH Relative humidity


SINCLAIR KNIGHT MERZ PAGE x

S Sulphur SF6 Sulphur hexafluoride SI Systeme International SKM Sinclair Knight Merz SOE Sequence of events SWG Standard wire gauge SWMP Soil and water management plan UBC Uniform Building Code UHC Unburnt hydrocarbons UL Underwriters laboratories UPS Uninterruptible power supply UPVC Unplasticised polyvinyl chloride VDU Visual display unit VT Voltage transformer WHO World Health Organisation WB World Bank WTP Water treatment plant XLPE Cross linked polyethylene

Units C Degree Celsius dB(A) Decibel (A weighted scale) Euro GWh Gigawatt hours kg kilogram kJ/kWh kilojoules per kilowatt hour kN kilonewton kPa kilopascal kt kilotonnes kV kilovolts kW, kWe Power, Power electrical Lux Illuminance m metre mm millimetres m2 metre squared mg milligram ms millisecond mg/L milligram per litre MMBTU Million British thermal units MJ/Nm3 Megajoule per normal cubic metre MV Megavolt MVA Megavolt ampere MVAr Megavolt ampere reactive MW, MWe Power, Power electrical MWth Heat flow pH acidity / basicity RH Relative humidity rpm revolutions per minute Scf/SCF Standard cubic foot $, USD United States dollar t tonnes %, % vol percentage, percentage volume


SINCLAIR KNIGHT MERZ PAGE 1

1. Project Description 1.1. General

It is the intention of Musandam Power Company S.A.O.C. (hereinafter referred to as The Owner); to install

a Natural Gas fuelled, dual fuel reciprocating engine based Plant with a minimum net firm capacity of 100 MW and with Fuel Oil as the alternative fuel. The plant shall supply electricity to the Musandam Electricity

Grid owned by the Rural Areas Electricity Company (RAECo).

The Site is located approximately 40 km to the south-west of Khasab and approximately 500 metres north of the Ad Darah border between the Sultanate of Oman and the United Arab Emirates in Wilayat Bukha. The

closest settlements within a 2 km radius to the Site are Ad Darah, Tibat and Sall Dawrah.

The Plant will be deemed phase 1 of a possible two phase development. An area has been identified for the

plant layout and provision has been made for future construction of phase 2.

The contract shall be carried out in accordance with the requirements of this OTS (hereinafter referred to as

"Specification"), which provides for the design, manufacture, factory testing, supply, delivery, off loading at site, erection, painting, site testing, setting to work and attention to defects, compliance with local and

national consents, regulations, standards and legislation on a turnkey lump sum contract basis, including all

related civil works, and such other works as the Owner may require, for a 100 MW minimum net firm

capacity Plant at the Musandam site (hereinafter and in the Conditions of Contract referred to as the Site).

The plant shall be optimised to offer a competitive least cost solution and the EPC Contractor shall offer a

unit size that takes due regard of all specified functional and operational requirements. The EPC Contractor

shall support the Owner in the provision of such supporting information as may be required to demonstrate

that the life cycle costs of the plant have been optimised.

1.2. Role of Technical Specification

The role of this Specification is to define the minimum functional requirements of the Works and to provide

site-specific data to the EPC Contractor. The Specification also serves to define the environmental and

regulatory constraints within which the plant must operate and with which the Works shall comply.

It is the intention of this Specification to provide the EPC Contractor the maximum freedom to provide the

most competitive offer based on the EPC Contractors standard plant and equipment though with the design

optimised for the particular scope of the project and taking the Owners requirements into account.

The Works shall be new, modern, proven, and safe and shall be designed for the highest availability factor, start reliability, efficiency and flexibility of starting within an offer that is commercially attractive.



2. Scope of Work 2.1. Summary of scope

The scope of work includes the design, manufacture, supply, factory testing, transporting, installation,

commissioning, acceptance testing, and repair during the defects liability period and all work incidental thereto whether specified in detail or not, necessary for the safe and efficient operation of the plant.

Generally, the main supply shall include, but not be limited to, the following:

1. Dual fuel reciprocating engines providing a total plant with a minimum net firm capacity of 100 MW at

all site ambient conditions on an [N+1] basis where N is the number of engines required to provide

the 100 MW net firm capacity. The minimum net firm capacity of 100 MW must be achieved across

the gas composition range provided under Appendix A of this OTS. The definition of the number of

additional units required may be dependent upon the plant configuration, if engines of different

capacities are offered.

2. Synchronous, 3phase, 50 Hz generators driven by the dual fuel engines and complete with all

auxiliaries.

3. Induced draft radiator cooling water system for main and auxiliary plant cooling.

4. All necessary auxiliary systems including, but not limited to, the following:

Gas Connection Facilities, Gas Metering Facilities and Metering Systems;

Gas conditioning equipment;

Fuel Oil unloading facilities, storage tanks, forwarding pumps and metering systems

Heating, ventilation and air conditioning equipment and systems;

Gas detection systems;

Fire detection and protection systems;

Compressed air system;

Cathodic protection;

Painting;

Tools and tackle for maintenance including special tools;

Workshop and store;

Water supply systems;

Water treatment plant;

Water sampling and dosing systems; and

Connections to off-site services.

5. Step up transformers from the generator voltage to the transmission system voltage; the EPC

Contractor shall offer a solution which meets the requirements of the RAECo security standards and takes into account the requirement to maintain load in the event of the sudden loss of one

generating unit. The transformers and associated connections shall be selected to support two

operating conditions as follows:

a) The maximum net output of the generating plant when operating at the Reference Conditions; and

b) The maximum net output of the generation plant when operating at ISO reference conditions.



6. Auxiliary transformers to allow the plant to supply its own auxiliaries.

7. Two auxiliary supply transformers, Aux V / 11kV, rated at 1MVA for connection to Tibat Grid 11kV

board.

8. HV cabling in concrete trenches from HV terminals of step-up transformer to the Tibat grid

substation GIS terminations

9. MV cabling in concrete trenches

10. All necessary auxiliary electrical systems including, but not limited to, the following:

Switchgear;

LV and DC auxiliary supplies systems;

Batteries, chargers and uninterruptible power supplies (UPS);

Emergency/black start diesel generator system;

Auxiliary transformers connected to the medium voltage switchboard, and sized to match the requirements of the Plant LV AC supplies;

Earthing and lightning protection system;

Surge arrestors;

Plant auxiliaries supply, including auxiliary transformers, HV/LV transformers, MV switchgear, LV switchgear, MV/LV busducts and cables, DC and UPS systems, lighting, earthing and

lightning protection systems; and

Protective systems covering all equipment included under this specification

11. An integrated distributed control system including all necessary control and protection

instrumentation, site telecommunications and connections to off-site services including, but not

limited to the following:

interfacing facilities for interchanging data, including Operating Parameters required as inputs to the Plant model between the Plant and the RDC;

I&C, including Plant control and monitoring system, telecommunication, protection systems, environmental monitoring equipment and system , field testing equipment, instrument workshop equipment, metering etc.;

control, indication, protection and telephone cables from the Plant to the new Tibat grid substation and associated marshalling cubicles; and

security systems including perimeter fence monitoring, CCTV system, access control to site and buildings, building intruder detection, gate intercom.

12. All civil and structural works associated with the above equipment including

- Site development which includes removal of material from the mountain on the site, filling and compacting the Site to foundation level and then layering and compacting the site to 15 metres

above mean sea level, with suitable fill material. . Slope protection between the original ground

level to +15m MSL is included by using either rip rap, shotcrete, reinforced concrete retaining

walls or a combination of the methods;

- Approximately 1.5 million cubic metres (the Bidder1 to confirm volume) of excess material from the Site levelling work shall be used for coastal reclamation. The Base Case shall be the

reclamation of land in the area demarcated by the Royal Oman Police and extended area

towards sea side, on the western side of the Khasab highway, southern side of the existing jetty,

1 References to Bidder to be amended to Contractor prior to execution of final form EPC Contract



opposite the Plant site. The Option Case shall be area demarcated on the western side of the

Khasab highway and the northern side of the existing jetty, . The Bidder shall also be

responsible for the relocation of any coral inhabiting the seabed affected by the land reclamation. The size of the coral beds are approximately 0.3 ha in area for the Base Case and

30 ha for the Option Case. The Bidder shall be responsible for the monitoring of the coral during

the construction period and shall undertake mathematical modeling to predict any erosion of the

coastal strip and topography caused by the land reclamation. The relocation recipient site could be up to 3000 metres from the coral donor site, MECA to decide final area. Monitoring will

include daily inspections by divers and bi weekly water sampling. The bidder should include

provision for necessary boat rentals & laboratory costs and execution plan. The reclamation

areas and the Royal Oman Police requirements, in terms of the Base and Option Cases are

detailed in Appendix 6 PART I (g) of the EPC RFP. The Royal Oman Police, the Owner and/or OPWP shall provide the necessary in-principle clearances, including the no objection certificate

from the Ministry of Environment and Climate Affairs to the Owner, and/or OPWP for the same,

prior to the issuance of the Notice to Proceed. The Owners environmental impact statement

shall include the coastal reclamation works as defined in the Base and Option Cases. The

Bidder is responsible for all construction related permits for the reclamation works. On completion of the reclamation works, the reclaimed area shall be handed over to the Owner

and/or the Royal Oman Police. The Base Case and Option Case should each be quoted for

separately and both are identified in Appendix 6.

- The design of the rock armour revetment and land reclamation is included in the scope of services, as is the relocation of any coral inhabiting the reclamation area seabed and monitoring

of the coral during the construction period, adhering to any conditions imposed by MECA. The

coral habitat to be translocated is identified in Appendix 6.

The Bidder should provide include for the cost of Monitoring Process to the translocate Corals

during reclamation phase periodic and till the COD. Monitoring process includes marine water sampling for analysis of TSS;

Any confirmatory Site investigations required (geotechnical, topographical, seismic, hydrogeological, hydrological, contaminated land, meteorological, soil resistivity, bathymetric,

etc). Initial surveys by the Owner are provided in Appendix 6 of the RFP for information. The

Bidder is to carry out their own surveys;

Any confirmatory Site topographical surveys required;

Data collection (including verification of design data provided in the Specification including transmission system technical data);

Site preparation, including preparation of Phase 1 and 2 areas, Phase 2 laydown area, common gas facilities, RAECo substation area, site drainage and sewage systems. Diversion and permanent drainage of the mountain side rainwater run-off to storm water drains is included in

the scope of services. The RAECO substation site area is to be prepared to the same

specification as Phase 1 & 2 in section 9.1.1, the location and the dimensions are indicated on

PDF Krookie of MIPP in Appendix 6 of the RFP;

Modifications to, or the relocation or removal of, existing pipelines, cables, drainage systems or any other facilities, which may be present on the Site;

Bunding around Fuel Oil storage tanks;

Engine foundations and associated work including power house building housing engines, generators and auxiliary equipment;

Auxiliary transformer foundations, steelwork, ground works, slabs, firewalls and finishing works



Central control room (Control Room);

Electrical equipment building;

Administration, workshop and stores building(s);

Water treatment plant and building;

Other ancillary buildings as a specific requirement of the EPC Contractors plant;

Miscellaneous plant foundations;

Pipe and cable bridges/racks, service ways, ducts and trenches;

Oil and water tank foundations, bunds etc.;

Fuel unloading facility

Fire protection building;

Gas reception area and gas pipeline reticulation including the MOG requirement for separate access to Natural Gas fiscal metering system and Natural Gas fiscal metering system building /

enclosure from the perimeter road;

Galleries, staircases and landings for access to the Plant;

Ancillary and temporary buildings (including offices for the EPC Contractor, OPWP and the Owner) and temporary housing camp (as required);

Roads and paved areas including construction of permanent access roads on-Site, construction of the primary access road to have a slope of not greater than 5% and connection to the secondary access road and perimeter roads. All roads to include lighting and barriers.

Site services including fresh water, general station use water, and fire services water

reticulation;

Storm water drainage, reject water and chemical process water systems;

Site wide effluent collection and reticulation system;

Fencing and gates;

Any additional site boundary wall/fencing with lighting;

Site finishing works trimming, grading, protection, hard landscaping; and

Construction of seawater intakes or beach wells (as required) and a water discharge system

13. Temporary fencing, lighting and guarding and all other materials and services necessary for the

safety and security of persons and property at the Site or such other areas used for storage during

construction;

14. Initial fill of lubricant, greases and other consumables (including initial fill of water treatment

chemicals) except fuels (Natural Gas and Fuel Oil) up to handover by the EPC Contractor.

15. Spares as described in this Specification

16. Special Tools as described in this Specification at paragraph 4.25;

17. Factory testing, commissioning and Acceptance Tests

18. Design, procurement, transportation, engineering and project management services

19. HAZOP, safety studies, location risk assessment for air intakes and exhaust stacks in the event of

gas release from MGP, etc

20. All plans, approvals, permits, authorisations, licenses etc in order to complete the Works and any

costs associated with such approvals, etc. The EPC Contractor shall be responsible for obtaining all

construction and building work permits.



21. The EPC Contractor shall be responsible for submitting all statutory and design code calculations for

third party verification, and obtaining such approvals as are required.

22. Comprehensive training of Owners operations and maintenance (O&M) personnel.

23. As-built drawings and comprehensive, fully cross referenced O&M manuals in hard copy and

suitable electronic form with suitable software program to allow ease of use.

24. Warranty as described in the Contract.

2.2. Terminal points

The Plant shall operate as a stand-alone Plant with its own independent systems to ensure security of

supply.

The Plant shall have the following interfaces:

2.2.1. Interfaces with the Licensed Transmission Sy stem Operator

The 132kV interface to the transmission connection shall be the 132 kV GIS cable box(es) located in the

LTSO GIS substation.

Interconnection of the Plant earthing system and the Tibat grid substation earthing ring

Terminals in interface marshalling cubicles in interface room in the new Tibat grid substation for the

following hardwired signals interchange:

VTs and CTs secondary connections (for step-up transformer protection);

inter-tripping signals (for Plant protection);

interlocking signals;

VT secondary connections (for synchronizing);

paralleling device signals for synchronising of the Licensed Transmission System Operators 132 kV circuit breakers at Tibat grid substation;

protection signals;

control signals;

monitoring signals;

measurements;

metering signals;

signals via IEC 60870-5-101 (serial) or IEC 60870-5-104 (TCP/IP) data communication links (protocol to be finalised at the design stage) to multiplex interface provided by the Licensed

Transmission System Operator in the interface room of Tibat grid substation (according to the

RAEC Code and the Consolidated SCADA List). This should include the signals required by the Licensed Transmission System Operator and the signals required by the Owner from the

Licensed Transmission System Operator; and

voice communication.

Two cable connections up to the circuit breakers of the 11 kV switchboard in the Tibat grid substation to

supply auxiliary power with a capacity up to 1 MVA at 11kV (with (n-1) level of security) to the Tibat grid

substation

Control and protection terminals at 11 kV switchgear in Tibat grid substation



11 kV cable differential protections. The EPC Contractor shall provide the necessary fibre optic cable

and ensure that his relay will be able to co-ordinate with the relay being provided by the Licensed

Transmission System Operator procured for the purpose; and

Direct dial and hotline interface.

2.2.2. Control, metering and protection

Plant synchronisation shall be controlled from the Plant. 132 kV circuit breakers at the Tibat grid

substation shall synchronise using the paralleling device.

In the Tibat grid substation control building, a separate room will be provided for the accommodation of

interface and tariff metering equipment. The room will have direct access from outside the building for access to the interface and metering equipment. All SCADA and metering interfaces from the Plant

shall be installed and connected at the interface cubicles / marshalling panels by the EPC Contractor.

The hardwired signals interchanged to and from the Licensed Transmission system Operator, at the

interface marshalling cubicle shall be exchanged as follows:

4 to 20 mA signals for analogue; and

volt-free change over contacts for digital signals.

There shall be a common signal interface panel, to be supplied, installed and connected by the EPC Contractor, located in the new 132 kV Tibat grid substation.

For all signals from/to the RDC, the Licensed Transmission System Operator will connect them to the

RDC.

Bi-directional tariff quality meters shall be supplied and installed by the EPC Contractor in a metering

panel located in the Tibat grid substation interface room. (Two (2) sets of meters will be supplied the main tariff metering equipment and back-up tariff metering equipment).

All generator transformer protection shall be supplied by the EPC Contractor and shall be located in the

Plant area.

All connection cable protection shall be supplied by the EPC Contractor and shall be located in the Plant area.

2.2.3. Interfaces with RDC:

The Plant shall be incorporated into the Licensed Transmission System Operators SCADA/energy monitoring system (EMS) at the RDC. Necessary multiplexing equipment will be provided by the

Licensed Transmission System Operator and located at the Tibat grid substation.

The SCADA/EMS interface between the RDC and Plant shall be achieved using two independent

gateways for conversion to IEC protocol 60870-5-101 (serial) or IEC 60870-5-104 (TCP/IP), protocol to

be finalised during the design stage. Interoperability between the RDC and Plant shall be ensured. The interface shall be communication ports on the multiplexing equipment provided by the Licensed

Transmission System Operator. The EPC Contractor shall provide all materials required to establish

redundant communication links to the multiplexing equipment, including patch cords, network switches,

fibre optic patch panels and fibre optic cable with accessories.

The data exchange between the RDC and the Plant as given in the RFP Appendix 6, Part I (f) shall be

provided and contain general requirements for different signal categories (measurements, production

metering, status indications, controls, indications/ alarms).

The Consolidated SCADA List as given in the RFP Appendix 6 Part I (e) contains all signals to be

exchanged with the RDC, from/to the Plant as well as from/to the Tibat grid substation:

Section A, substations.



Section B, Plants: The signals are mainly related to the Plant and shall be exchanged with the DCS supplied by the Owner. However, there are some signals related to the HV side of the step-up transformers, which shall be measured within the substation and they will be exchanged as above.

2.2.4. Interfaces to Natural Gas supply

The interfaces to the Natural Gas supply system will be in accordance with Section 6 of this

Specification.

Natural Gas shall be supplied by pipeline from the adjacent gas processing plant to an agreed, metered

terminal point at the gas conditioning facilities at the Plant boundary.

Remote monitoring interface to adjacent gas processing facility terminal point at a signal terminal

cabinet located at the gas pipeline terminal point.

2.2.5. Other service interfaces

The following service interfaces shall also be considered by the EPC Contractor:

Lube oil and Fuel Oil shall be delivered by road tanker. Loading points shall be provided by the EPC

Contractor in close proximity to the inlet to the storage tanks at site

Clean water supply from dedicated sea water connection and water treatment plant

Clean water drains to seas outfall, after treatment, via site drainage system

Sewage connection fitting for trucking offsite

Chemicals will be delivered by road tankers and be unloaded at a dedicated unloading station adjacent

to the chemical storage tanks within the Plant. The terminal point shall be the inlet flanges on the

respective chemical unloading manifolds;

Waste oil will be pumped to the waste oil storage tank, where it will be removed by road tanker;

Plant access road will be from the existing adjacent public highway.

2.2.6. Metering and settlement equipment/measuremen t

The responsibility for the supply and installation of metering shall be as tabled below:



Location Supply Installation

Energy Input/Output

(132 kV level)

Main (Pay) Metering Facilities

CT / VT

Tibat grid substation

Licensed Transmission System Operator (Owner to co-ordinate

his requirements)

Licensed Transmission System Operator

Meter Tibat grid substation

metering Room EPC Contractor EPC Contractor

Gas Metering Facilities

Main (Pay) Metering Facilities

Plant metering room

EPC Contractor EPC Contractor

Fuel Oil Metering Facilities

Plant metering room EPC Contractor EPC Contractor

Location Supply Installation

Energy Input/Output

(132 kV level)

Back-up (Check) Metering Facilities

CT / VT

Tibat grid substation


(Generator to co-ordinate his requirements)


Meter Tibat grid substation

metering room EPC Contractor EPC Contractor

Gas Metering Facilities

Back-up (Check) Metering Facilities


Fuel Oil Metering Facilities


2.2.6.1. Metering of Electrical Energy Delivered

Electrical Energy Delivered from the Plant will be measured at the Electrical Delivery Point on the 132 kV

system. The metering equipment for the above mentioned supply locations shall be provided installed,

maintained, owned and operated by the EPC Contractor according to the Metering and Data Exchange Code

(RAEC Code, RMDEC.5 Electricity Meters). The metering equipment will give, for each direction of flow, the

following quantities:

a continuous automatic record of both MW and MVAr;

an automatic record of the MWh and MVArh according to RMDEC.7.4.1 (RAEC Code); and

a continuous integrating record of the MWh and MVArh.

The system shall have history recording and reporting features. The metering panel shall have a security

sealing arrangement.



One (1) set of the meters shall be used to separately measure the Electrical Energy imported and exported

by the Plant. The second set of the meters measuring in the same manner as the first set, will be used for

verification purposes. Each set of meters shall be connected to a separate set of current transformers.

Provisions shall be made for signalling the above data to the RDC.

The accuracy of meters, current transformers and voltage transformers shall each be within zero point two

per cent (0.2%). All meters shall be sealed.

2.2.6.2. Metering of Natural Gas

The EPC Contractor shall supply and install the gas energy metering equipment at the GCF, including an

independent access to the metering compound. Independent access provisions shall be provided in the

Plant Metering Room supplied for the Ministry of Gas (MOG) to access the fuel gas metering system.

2.2.6.3. Metering of Fuel Oil

The EPC Contractor shall provide and install all necessary Fuel Oil metering equipment including:

flow indication, registration and metering;

automatic record of Fuel Oil quantity consumed over time interval; and

continuous integration record of Fuel Oil consumed.

2.2.6.4. Measurement of Site ambient conditions

The EPC Contractor shall provide and install Ambient Conditions Measurement Facilities for monitoring the

ambient conditions at the Site which shall include instrumentation for measuring ambient air temperature (dry

bulb), ambient barometric pressure and relative humidity.

2.2.7. Terminal point design, management and coordi nation

The EPC Contractor shall be responsible for the design of all its terminal points and the full management of

all its interfaces.

To ensure adequate coordination, the EPC Contractor shall arrange a dedicated interface meeting with the

two other project related contractors (switchyard and gas supply) as soon as possible after the contract is

awarded, but not later than 1 month after Limited Notice to Proceed (LNTP) or Notice to Proceed (NTP) whichever occurs earlier.. At this meeting all terminal point locations, design parameters and physical tie-in

responsibilities shall be determined and agreed in writing.

A point of contact from each contractor shall be nominated to liaise and manage the interfaces between the parties, and the Owner shall be copied on all correspondence.

2.3. Provision of services during construction

The Owner shall provide the following services during construction:

a. Operators and maintenance personnel shall work under the supervision and direction of the EPC Contractor during Plant commissioning.

b. Permits, Licenses and Approvals as outlined herein

The EPC Contractor shall provide the following services during construction:



a. All electricity supplies

b. All construction and potable water

It shall be the EPC Contractors responsibility to obtain and treat all water required to ensure it is suitable for concrete production and for use as potable water.

2.4. Related Projects and excluded Work

The following items are excluded from the scope of the EPC Contractor:

2.4.1. 132 kV Tibat Grid Substation

The construction, operation and maintenance of the Tibat grid substation is outside the scope of the Project

with the exception of connection of four (4) connection lines and associated equipment to connect the new Plant incoming circuits to the new 132kV substation. The grid substation equipment installed by the Licensed

Transmission System Operator shall be suitable for 3 phase, 50 Hz, 132 kV nominal voltage, and the system

shall be a solid neutral earthed system complying with the following:

highest system voltage 145 kV rms

3 phase symmetrical short circuit current 40 kA rms / 3 seconds.

3 phase asymmetrical short circuit 128 kA peak

full wave impulse voltage (BIL) phase to earth 650 kV peak

circuit breaker insulating and interrupting medium SF6

isolation 1050 kV

2.5. Regulatory approvals

The Owner has undertaken a pre-feed environmental assessment and obtained a Preliminary Environmental

Permit (PEP) from Ministry of Environment and Climate Affairs (MECA). The Owner is following a

comprehensive approval process involving planning and environmental issues. The Owner will complete an

Environmental Impact Assessment (EIA) to secure approval for the development based on the selected

technology, design and plant configurations. The copy of the pre-feed environmental assessment report will be provided to the EPC Contractor for information.

The EPC Contractor shall be required to support the Owner by providing necessary information in the EIA

and shall comply with the relevant requirements of the EIA. On completion a copy of the EIA will be provided to the EPC Contractor for information.

2.6. Codes and standards

The codes and standards for the Plant shall be in the following order of precedence:

1. Omani standards e.g. Oman Electrical Standards as defined in the RAEC Code as may be approved by the relevant Competent Authority from time to time;

2. the standards and recommendations of the International Organisation for Standardisation (ISO) and the

International Electrotechnical Commission (IEC); and

3. other standards and codes which are internationally accepted.



The codes, standards and specifications referenced in this Specification shall include addenda and

amendments in force at Notice to Proceed (NTP) and shall govern in all cases where references to them are

made. Other equivalent international standards may only be used with the written agreement of the Owner.

Where specified otherwise, mechanical systems may also be designed, manufactured, constructed and

installed according to the following standards, amongst others:

Engine ISO 3046

Vibrations ISO 8528 part 9

Mechanical design EN-ISO 12100

Stair and platforms ISO

Dimensional standards for installation materials (pipes, beams, etc.) DIN, ISO, SFS and EN

Pipe design calculations EN 13480 and DIN 2413

Tanks API 650 for Design only

Typical material standards DIN, SFS and EN

The EPC Contractor shall comply with all laws and regulations of Oman. All apparatus and material

supplied, and all work carried out and matters arising in fulfilment of the Contract shall conform, at the EPC

Contractor's expense, in all respects to all the laws and regulations, by-laws and requirements of

national/local or other authorities which are applicable to the Works.

The Works shall be designed, constructed, and commissioned in accordance with the Contract and

International Standards. Where no appropriate Standard exists, an alternative Standard may be used,

subject to the agreement of the Owner.

In the event that a conflict arises between codes and standards of practice nominated in the Contract the

more stringent criteria shall govern. Should the difference not be resolved on the criteria of stringency the

Owner shall decide which provision shall apply. The EPC Contractor shall be obliged to comply with all such decisions without any variation to the Contract.

The EPC Contractor shall not depart from the agreed Standards without the written acceptance of the

Owner. The EPC Contractor shall provide information regarding their proposed standards in response to this requirement.

All units of measurement and symbols shall conform to the Systeme International dUnites (SI units) for

basic and derived units or names of units, unless otherwise agreed in writing by the Owner.

SI units shall be used in all correspondence, documentation, calculations, drawings, measurements etc. If

reference has to be made to non-standard items, the SI units shall be quoted followed by the non-standard

units in brackets.



3. Plant Design Criteria 3.1. General

a) The Plant shall be designed to provide a minimum net firm capacity of 100 MW at Site Reference

Conditions across the gas composition range provided under Appendix A of this OTS. Firm capacity shall be established by providing surplus capacity to a minimum generation security standard

equivalent to an N+1, where N is the number of installed units required to meet a demand of 100 MW.

b) The total installed capacity of the Plant and the number of generating units will vary according to the

size and type of units deployed within the plant to meet the net firm capacity requirement. Plant

configurations may comprise a large number of small units, a small number of large units or a hybrid arrangement with a combination of large and small units, where an N+1 redundancy is based upon the

larger of the installed units.

c) Generating units may be grouped in blocks, where each block or bus-section is connected via a step-

up transformer to the 132 kV RAEC substation. The number of 132 kV breakers available at the RAECo substation is 3 (three), and this can be increased up to a maximum of 5 (five).

d) The Plant is required to operate over the entire load range in accordance with RAEC System

requirements and shall be dispatched at all times with spinning reserve sufficient to cover the forced

outage of the largest power infeed loss . The Bidder should demonstrate by way of a single line diagram showing the generating unit , transformer and switchgear arrangements that the Plant can be

operated to ensure that in the event of a Main Equipment failure leading to the loss of power infeed:

the largest power loss is limited to the greater of the output of the largest operating generating unit or the sum of the outputs of generating units connected to the same busbar section;

that at all times the maximum step load available from the generating units that remain in service after the largest power loss does not exceed the maximum permissible step loading

available.

e) The Plant is required to operate over the entire load range and emissions to air must remain within controlled limits :

for the Plant operating above [22 MW], each generating unit shall not be operated at a load less than fifty (50) per cent of its MCR rating within the guaranteed emission limits.

for the Plant operating below [22MW], each generating unit shall not be operated at a load less than thirty (30) per cent MCR rating within the guaranteed emission limits.

f) Each Reciprocating Engine power unit shall be capable of independently operating on either Natural

Gas or Fuel Oil. Individual Power Units or Power Unit Blocks should be able to operate on Fuel Oil

with the remaining Power Units or Power Unit Blocks operating on Natural Gas;

g) Fuel Oil operation is permissible to meet primary response requirements provided the generating units

change back to gas once stable operation is achieved. The maximum recovery time for a step load

increase shall be 5 seconds. Change to Fuel Oil operation shall be automatic, immediate and with no

interruption to load.



h) The primary response of generating units governor system shall increase power output to restore the

generation/demand power balance without the system frequency falling below 45.0Hz.

i) Generating units shall not be dispatched at levels below the minimum output necessary for stable operation and with no restrictions on subsequent loadings within the permissible step loading.

j) Bidder is required to provide evidence that the primary response capability is acceptable taking into

account prime mover speed controllers, air/fuel system dynamics, prime mover dynamics and

generating unit rotating mass inertia.

k) Tenderers may optimise the design of generating units to enhance their ability to accept larger step

load increases in order to meet primary response requirements.

l) The Plant shall have the ability to deliver the minimum net firm power capacity of 100 MW at the

Reference Conditions within the Natural Gas Maximum Daily Quantity of 21,125 MMBTUs (equivalent

to 25 million standard cubic foot per day at a minimum LHV of 845 BTU/scf) across the gas composition range provided in Appendix A of this OTS. Normal operation shall be on Natural Gas with

Fuel Oil providing the alternative fuel.

m) Generating unit switchboards shall be provided such that following a forced outage of any single

generation circuit or single section of busbar, the loss of power In-feed shall not exceed the largest

power in-feed loss. A "single section of busbar" is defined as a section of the switchboard that is either stand alone or connected via busbar section circuit breakers.

n) Generating unit switchboards shall be provided with step-up transformers to the RAECo 132kV

transmission system. The number and ratings of step up transformer shall be such that with the

forced outage of a transformer the loss of generation in-feed shall not be greater than the largest power in-feed loss and all remaining transformers shall not be overloaded.

o) Generating unit switchboards shall be equipped with switchgear with short circuit ratings capable

withstanding short circuit levels with all generating units synchronised when operating at rated power

output at lagging power factor. To meet this requirement tenderers can provide more than one power

block connected to the RAECo 132kV system in which case the contribution to short circuit levels from the other power blocks shall be taken into account. An allowance shall also be made for increased

short circuit contributions from the RAECo 132kV network when further power plants are connected to

the 132kV network to the extent that the 132kV switchgear short circuit level is 40kA.

p) The RAEC System load growth over the Contract Years as defined in the LTSA together with the seasonal requirements, the daily load cycling and the spinning reserve requirements shall be taken

into consideration when selecting the Power Unit capacity for the Plant. The Bidder shall select the

Power Unit capacity for the Plant such that the selected Power Units result in the lowest Plant life

cycle and security of supply requirements of RAEC are complied with. Bidder shall use the bid

evaluation tool ((herein referred to as BET) as a basis to select a Power Unit configuration which is considered optimum.

q) It is envisaged that the Plant will be required to operate at a high load factor during the Summer

Period as defined in the LTSA and is likely to run at a lower load factor during the Winter Period as

defined in the LTSA. The Plant shall have the flexibility to run with part of the Plant shutdown.

r) The Plant must be designed, manufactured, installed and be suitable in every respect for continuous

operation at the GCPC, as well as at part loads and cyclic duty to meet daily peak loads. The Plant

shall be designed for an operating life of at least 25 years.

s) The Plant shall be designed to permit unconstrained operation over the full range of ambient

conditions.



t) The Plant shall, as a minimum, meet the following technical criteria:

All equipment offered shall be of proven design and new manufacture which can meet the

requirements of performance, reliability and availability specified in this document.

The Plant shall be designed such that the impact of a failure of any single piece of auxiliary

equipment will cause no reduction in the output of the Plant.

The Plant shall be designed such that the impact of a failure of any single piece of Main Equipment will result in a loss of output of not more than the largest single power loss.

u) The control system shall be designed and set up to ensure that one generating unit shall remain on-

load in the event of the loss of the 132 kV transmission grid. This is to ensure that a supply is maintained for house loads and local loads.

v) The electrical generators shall be capable of supplying their rated real output power at rated frequency

and rated power factor over the range 0.8 power factor lag to 0.95 lead for a voltage range of plus or minus 10 per cent from rated voltage at the generator transformer HV terminals. Each generator shall

also be capable of supplying its rated output at rated voltage and rated power factor at a frequency

which may vary between 48 Hz and 51 Hz.

w) The electrical generators shall be capable of continuous operation without injurious effects with an output over the range 0.8 power factor lag to 0.95 power factor lead and capable of generating rated

active power over the above power factor range.

x) The plant shall be designed for automatic, immediate switchover to alternative fuel with no interruption to load in the event of a disruption to the primary Natural Gas fuel supply and the Bidder shall carry

out and provide a design study to ensure that a successful fuel changeover may be achieved together

with a changeover back to Fuel Oil.

3.2. Generating unit availability criteria

Each Power Unit in the Plant shall be designed for an average equivalent availability factor (EAF) of at least 92% and a forced outage factor (FOF) of not more than 3% (as defined by IEEE 762-1987, Standard

Definitions for Use in Reporting Electric Generating Unit Reliability, Availability, and Productivity).

Where:

=

, and =

and,

AG = Available generation

MG = maximum theoretical generation

FOH = forced outage hours

PH = period hours.

The design shall incorporate sufficient redundancy to achieve these goals and where necessary incorporate

automatic start-up of the standby plant in the event of failure of the duty item.



The Bidder shall provide details and references of the recorded operational reliability of the main equipment

and systems to be provided.

3.3. Site and layout

The Site area, location and coordinates of the Site including temporary areas that may be used for construction laydown and area allocated for the future, Phase 2, expansion of the facility are shown

diagrammatically in the RfP. The entire site, as defined by the krookie, shall be levelled and compacted to

the final elevation of +15m MSL with the exception of access roads. The EPC Contractor may propose a

different site elevation provided that it is able to present solutions to retention of the site surface area, road

slope and spoil removal.

The EPC Contractor shall note that OOCEP is constructing the Musandam Gas Plant (MGP) in very close

proximity to this Plant. MGP will process 20,000 bpd of crude oil and 45 MMSCFD of associated gas from

the West Bukha field. MGP will include process units for separation of the well fluids, gas compression, gas dehydration, dew pointing, desalting, crude stabilisation, gas sweetening, a sulphur recovery unit, LPG

bottling area, nitrogen plant, flares, produced water treatment, fuel and chemical storages, etc. The MGP

off-plot facilities include a jetty, well fluid import pipelines, seawater intake pipelines, outfall systems, crude

and gas export pipeline and a single buoy mooring for crude export. The MGP industrial facility presents

potential operational safety hazards that the EPC Contractor must understand and consider in its proposal

and its site arrangement.

The EPC Contractor shall offer its optimised standard design taking into account the conceptual layout and the parameters detailed below:

the Owners requirement to allow space for expansion of the Plant in the future;

the topographical nature of the Site;

the adjacent MGP, switchyard and incoming gas supply pipeline.

The final layout shall allow sufficient space for equipment accessibility and laydown during maintenance

activities such that outages can be completed within the times allowed in the overhaul schedule.

The EPC Contractor shall demonstrate in the layout plan and the design of systems how these goals have

been achieved, to the Owner's satisfaction and agreement.

The final layout shall be to the approval of the Owner.

3.4. Site conditions

The Plant item shall be designed to withstand the most extreme ambient conditions to which it may be

subjected and to continue to function normally whilst operated at its maximum rating.

The Site elevation is approximately 15 m above sea level and the following ambient conditions are provided

for guidance:



Temperatures

maximum ambient temperature in the shade, to be taken as air inlet temperature for air-conditioning and ventilation

C (dry bulb)

50

minimum ambient temperature C (dry bulb)

5

average annual ambient air temperature

C 30

maximum metal temperature in the sun C 85

Barometric pressure

maximum barometric pressure Mbar 1030

minimum barometric pressure Mbar 970

Humidity

maximum ambient relative humidity % 100

average annual ambient relative humidity

% 70

minimum ambient relative humidity % 10

Annual rainfall

maximum annual rainfall mm 1000

minimum annual rainfall mm 5

maximum rate of rainfall mm/min 0.8

average annual rainfall mm 50

Wind

maximum wind velocity km/h 160

design wind velocity km/h 200

Dust concentration

dust concentration in the air under mg/m3 1.02.0



normal conditions

dust concentration in the air approx. under sandstorm conditions

mg/m3 100

The environment shall also be considered as coastal with a salt laden atmosphere. Materials used shall be

suitably selected to resist the environment.

The EPC Contractor shall carry out any air sampling necessary to determine the quality of the ambient air

and use this information in the design of the filtration system for the dual fuel engines and elsewhere in the

design of the plant as required.

The EPC Contractor shall be responsible for confirming the accuracy of all data on climatic conditions at the

site.

Attention is drawn to prevailing severe climatic conditions, such as high ambient humidity at high air

temperatures. A considerable amount of salt is contained in the atmosphere, giving rise to severe corrosion

attack. Protection against dust and sand for outdoor equipment requires special attention. Rainfall is very

erratic but attention must be paid to the fact that sudden heavy downpours can occur. Strong winds are common. Sand and dust storms are frequent. Sandstorms can be severe and can continue for days with the

atmosphere heavily laden with dust particles. Fine dust in these sandstorms can be as small as 2 microns.

Extreme wind and rainfall conditions have been experienced on a number of occasions in recent years, cyclone Gonu (2007) and cyclone Phet (2010) being the most notable extreme weather events.

If the EPC Contractor requires seawater, it shall conduct its own investigations to verify the composition of

the seawater and also determine additional water quality parameters such as sulphate, suspended solids (or turbidity) and boron at the Site for its design purposes. If seawater is required, the Plant must be capable of

operation at a seawater temperature of 36oC.

3.5. Fuel

Information regarding the Natural Gas and Fuel Oil to be consumed on site is included in Appendix A.

The EPC Contractor shall be responsible for providing the complete installation of Gas Connection Facilities and Metering Facilities to conform to the specifications and connection arrangements as detailed in

Appendix D and shall provide appropriate fuel conditioning equipment consistent with the engine

manufacturers requirements.

The EPC Contractor will also be responsible for providing the complete installation on the Plant side of the

Gas Delivery Point, downstream of the Gas Connection Facilities, Gas Metering Facilities and the Metering

Systems, including but not limited to, the emergency shutdown system, equipment for the provision of

Natural Gas pressure, conditioning and quality control as required by the reciprocating dual fuel gas engine generators.

3.6. Water management system

The EPC Contractor shall design the Works to minimise the use of water. Effluent streams shall be reused

wherever practical. Maximum emission levels of effluent discharges from the works shall not exceed the

limits stated by the MECA Ministerial Decisions and/or the IFC 2008 Environmental Health and Safety

Guidelines for Thermal Power Plants. The EPC Contractor shall provide a preliminary water balance for various operating conditions in its tender.



3.6.1. Water supply

The EPC Contractor shall be responsible for the design and installation of the complete water treatment and

reticulation system for the Works.

3.6.2. Clean storm water

Clean, non-contaminated storm water shall be discharged to an agreed nearby location outside the plant

boundary (likely to be the sea) as per the environmental permit.

The EPC Contractor shall be responsible for the design and installation of the complete storm water system

for the Works.

3.6.3. Reject water

The EPC Contractor shall design and install a complete reject water system for the Works, including a

collection pit system to collect the reject water runoff. The design shall be complete with an interception system capable of separating any oil contained in the reject water prior to the water being discharged off-

site. The collection pit system shall also be sized to capture, retain and process a total oil spill from the

largest oil containing vessel from within the Plant facility and any associated fire protection or storm water

captured with the oil.

3.6.4. Sewage

All sewage from the Works shall be directed by underground pipe work to an on-site sewage treatment system.

The EPC Contractor shall be responsible for the design and installation of the complete sewage system for

the Works and shall provide any additional sewage handling and/or treatment necessary during construction.

3.6.5. Potable water quality

Potable water produced for the Works shall meet current World Health Organisation (WHO), PAEW and the Musandam Govenorate Drinking Water Guidelines.

3.7. Cooling water

The plant shall be cooled using fin fan radiators and water for make-up purposes shall be supplied from the

treatment plant designed and installed by the EPC Contractor.

3.8. Environmental criteria

3.8.1. General

The EPC Contractor shall design and construct the Works such that it complies with all applicable

environmental laws and regulations and meets the requirements of the Ministry of Environment and Climate

Affairs (MECA). All practicable measures shall be taken to prevent harm to the environment as a result of

the construction and operation of the Works. This shall include all relevant Omani standards and guidelines. An illustrative, non-exhaustive list of regulations is listed below:

Ministerial Decision 17/93 Regulations for the Management of Solid Non-Hazardous Waste;

Ministerial Decision 18/93 Regulations for the Management of Hazardous Waste;

Ministerial Decision 79/94 Issuing Regulations for Noise Pollution Control in Public Environment;



Ministerial Decision 80/94 Issuing Regulations for Noise Pollution Control in Working Environment;

Ministerial Decision 145/93 Regulations for Wastewater Re-use and Discharge (under Review);

Ministerial Decision 140/93 Regulations for Chemical Materials Registration and Related Permits;

Ministerial Decision 248/97 Regulations for Handling of Toxic Substances;

Ministerial Decision 421/98 Regulations for Design of Septic Tanks

Ministerial Decision 281/2003 Regulation for the Control and Management of Radioactive Materials;

Ministerial Decision 118/2004 Regulations for Air Pollution;

Ministerial Decision 316/2001 Barring of Circulation and Usage of Some Hazardous Chemical

Substances including Polychlorinated Biphenyls (PCBs);

Ministerial Decision 286/2008 Occupational Health and Safety Precautions;

Ministerial Decision 243/2005 Regulation for the Control and management of Ozone Depleting

Substances;

Ministerial Decision 187/2001 Regulation Organising Issuance of Environmental Approvals and the Final

Environmental Permit;

Ministerial Decision 18/2012 Regulations on Management of the Climate Affairs;

Ministerial Decision 68/2004 Amendment to Articles of Regulation Organising Issuance of

Environmental Approvals and the Final Environmental Permit; and

Royal Decision114/2001 - Law on Conservation of the Environment and Prevention of Pollution.

The EPC Contractor shall design the plant and provide all environmental monitoring plant, equipment and

systems such that, when operational, it shall be possible to confirm that the Works meet the requirements of

this Specification

Specific requirements are identified below.

3.8.2. Emissions to air

a. Reciprocating Engines (REs) specified for the Plant shall employ the best available technology

(BAT) not entailing excessive cost to minimise air emissions including lean burn technology. b. A Preliminary Environmental Approval has been obtained from MECA for the Plant subject to the

approval/ detailed findings of the Owners EIA. With respect to air emissions, the Preliminary

Environmental Approval is contingent on the Plant design meeting/ Owners EIA demonstrating that

resulting ground level concentrations of pollutants do not exceed the provisional Omani Ambient

Air Quality Standards (OAAQS). An Air Dispersion Modelling Study provided to MECA has demonstrated the OAAQS are achieved, provided the requirements (c) to (e) are fulfilled.

c. The Bidder shall ensure stacks are designed to aid efficient plume rise. Stacks from individual

engines are to be collected into two clusters (segmented stacks). The stacks are to be located as

close to each other as practically possible and in essence form one-a single stack cluster for the

purposes of plume rise. d. Stacks shall be not less than 50 meters above ground level.

e. Bidder shall provide an online flue gas monitoring system (Continuous Emissions Monitoring

System (CEMS)) to MECA requirements

f. The Bidder shall provide guarantees with respect to emissions to air from each engine stack after the engine. Table A provides data derived from the Air Dispersion Modelling Study that ensures the

OAAQS are achieved

Table A: Emissions Concentrations meeting OAAQS using Natural Gas with Reciprocating Engines:

30% MCR 50% MCR 100% MCR



Nitrogen dioxide mg/Nm3 150 150 150

Unburned hydrocarbons (NMNEHC as C3H8)

1 mg/Nm3 715 365 220

Particulates (PM10) mg/Nm3 50 50 50 1 For Natural Gas the concentration of propane may be assumed at max 3.03 mol %, butane & higher hydrocarbons at max 0.11 mol% and silicon and aromatic hydrocarbons absent. Note: all emissions concentrations are expressed as Nm3 @15% O2, dry, 0 deg C, 1 atm

The Bidder shall provide manufacturers information on all emissions details at given site reference conditions

and fuel specification from the stacks so that the Owner may complete any further air dispersion modelling

required. Such information may include typical VOC (NMNEHC)/NMHC emission concentrations and mass flow rates such that the Owner may confirm that the stack height is adequate.

3.8.3. Other emissions to air

All other emissions to air shall be minimised if it is not possible to contain them completely.

The following minor air emissions are permissible:

Natural Gas combustion products from gas heating units;

Combustion products from the emergency/black start diesel generator

The use of ozone depleting substances shall only be permitted with the agreement of the Owner, again

subject to any required regulatory approval.

The emission of greenhouse gases shall be minimised.

No offensive odours shall be emitted from the Works.

A Project Surrounding Air Quality Monitoring Station shall be provided in order to monitor the components of

carbon monoxide, carbon dioxide, Nitrogen dioxides (Nitrogen dioxide and Nitrogen dioxide), hydrocarbons

(methane and non-methane hydrocarbons) and suspended particles (PM 10 & PM 2.5) in addition to weather

forecasting elements (i.e. wind speed, wind direction, air temperature and humidity ratio); The information

obtained including the results of such monitoring shall be submitted monthly to the Ministry.

Selective catalytic reduction (SCR) (Option)

The Contractor shall review the project requirement to comply with the Oman regulatory requirements and

IFC guidance limits for emissions of pollutants to air, as outlined in section 3.8.2 of this specification, and if

appropriate provide a selective catalytic reduction (SCR) system to reduce NOx emissions below the

applicable limits. The Contractor shall also take into consideration the range of main and pilot fuel compositions, engine loads, and operating conditions when considering the requirement for such SCR

equipment. The Bidder shall supply an optional price for the provision of the SCR system.

The SCR equipment shall include the complete operating system, including the covered storage for dry materials, all materials handling requirements, mixing tanks (if required), forwarding and dosing pumps,

reagent bulk tank, catalyst, controls, instrumentation, air compressor plant (if required), interconnecting

pipework and safety related equipment.



The contractor shall include for a 90 days supply of all reagents in his offer, based on the continuous operation of all reciprocating engines station at full load.

3.8.4. Emissions of dust

The EPC Contractor shall control and monitor the emissions of dust during construction activities.

The EPC Contractor shall provide a plan detailing the measures it intends to implement in order to achieve zero visible dust emissions from the Site. The Work shall be undertaken in such a way as to prevent the

release of dust from the Site and shall be monitored using an agreed localised dust monitoring program, and

the dust concentrations shall be compared with OAAQS.

The area of disturbance shall be minimised. Mobile water carts shall be used to dampen any areas of

exposed soil.

3.8.5. Emissions to water

The Works shall be designed such that they comply with the recommendations of the EIA and IFC 2008

Environmental Health and Safety Guidelines for Thermal Power Plants.

Reject water shall be free of oils and solids and drainage systems shall be designed such that no flooding of

the Project or adjacent facilities will result from Construction or operation of the Project.

Oily wastes shall be led to a treatment system prior to discharge. Contaminated, or potentially contaminated,

waste streams shall be collected and treated prior to discharge. Contaminated waste water shall be treated

so that the effluent emissions do not exceed the limits specified by the IFC 2008 Environmental Health and

Safety Guidelines for Thermal Power Plants, as listed: are met

Parameter Maximum concentration mg/L

pH 6-9

Total Suspended Solids 50

Oil and grease 10

Total residual chlorine 0.2

Chromium (Total) 0.5

Copper 0.5

Iron 1.0

Zinc 1.0

Lead 0.5

Cadmium 0.1

Mercury 0.005

Arsenic 0.5

Temperature increase Not more than 1C within 300 m eters of the discharge(as per MECA

requirement 159/2005)

The EPC Contractor shall provide a suitable testing kit which will allow the Owner to regularly take samples and test the quality of all discharges. Facilities shall be provided where necessary to prevent the discharge of

liquid effluents not meeting the requirements of this specification.



3.8.6. Hazardous and industrial waste

The entire Plant must be designed, operated and maintained in such a way to prevent any soil

contamination. Hazardous or industrial waste shall be stored and disposed of in a manner to minimize its

impact on the environment including appropriate segregation for storage and separate disposal by a waste

transporter agreed by the Owner.

Hazardous or industrial waste shall not be buried on site.

A comprehensive plan shall be prepared and submitted to Hazardous and Non-Hazardous Waste Department of Different Types (i.e. liquid and solid wastes) of the Ministry, including full details about

procedures taken in order to decrease, recycle and treat such wastes, compliance with the correct

environmental management with regard to the storage and handling of raw material, The plan shall include

non-storage of raw material and wastes in open places or on grounds that are not lined with leakage-

prevention materials. Environmental license applications related to the same shall be submitted to the component departments of the Ministry.

3.9. Noise

3.9.1. General

The EPC Contractor shall design the Works such that the specified noise criteria are met under all operating conditions including start-up, shutdown, and normal operation and unit trips.

The sound levels shall be measured according to ISO standards and warning notices shall be provided at all

entrances to rooms or areas where the noise level may exceed 75 dB (A). The wording of these notices shall be subject to the agreement of the Owner.

All single frequencies generated may be significant and require abatement. Noise shall be free of tones,

special audible characteristics or impulsiveness. Subjective assessment of such characteristics shall be

supported by objective evidence (e.g. frequency analyses), where appropriate. When any noise has such

special audible characteristics a minimum 5 dB penalty shall be applied.

To meet the noise level requirements, the Plant is required to be equipped with standard noise attenuation features. All machinery which exceeds the permissible noise limits shall be equipped with silencers or with

lagging or specially designed acoustic enclosures.

3.9.2. Noise impact

The limits of noise emitted from the Plant shall not exceed the relevant limits of the Oman regulation MD

79/94; Regulations for the control of noise pollution control in public environment:

Article 2(b): industrial plants and public works - power plants:

type of district

Leq, T, dB(A)

Over time period

A B C

Rural residential recreational 60 55 50

Suburban residential 65 60 55

Urban residential 65 60 55

Urban residential with some workshops or business; city hub 65 60 55



type of district Leq, T, dB(A)

Industrial and commercial 70 65 60

The applicable time periods are defined in the regulations as;

A - workdays - daytime; after seven a.m. up to six p.m. LMT

B - evenings - evenings; after six p.m. up to eleven p.m. LMT

C - holidays and nights; after eleven p.m. up to seven a.m. LMT

For noise of tonal or impulse character, an adjustment shall be made to the measured or calculated value of

the equivalent continuous A -Weighted sound pressure level of the noise.

This shall be as follows:

For tonal noise, the adjustment shall be 5 dB (A).

For impulse noise, the adjustment shall be 5dB (A).

For the noise of combined tonal and impulse character the adjustment shall be 7 dB (A).

3.9.3. Noise in working environments

The noise levels in the following rooms shall not exceed:

Offices, cafeteria, rest rooms, and any other area of common personnel use - 60 dB(A);

Control room - 55dB(A);

Workshops, maintenance garages, and inside all other buildings with extended occupancy by operation and maintenance staff - 55 dB(A).

3.9.4. Noise design and reporting

The EPC Contractor shall submit to the Owner interim noise design reports within three months of Notice to

Proceed (NTP) demonstrating compliance with the MECA requirements and as to how the specified noise

limits shall be met. Reporting shall include equipment noise levels, details of noise control measures and

preliminary calculations for environmental and on-site noise. The use of engineering controls to reduce workplace noise shall be used as the primary control mechanism wherever it reasonably possible to do so.

A final noise design report shall be submitted to the Owner within 6 months of Notice to Proceed. This report

shall include but not be limited to the following:

All equipment suppliers noise guarantees and supporting data.

Details of all noise control measures.

Calculations of in-plant and environmental noise level to demonstrate compliance with the specified limits.

Provision shall be made in the Plant facilities for monitoring and control over the noise resulting from the

operation of the different units and facilities of the Plant subject to regulations regulating Noise Pollution issued as per Ministerial Decrees Nos. (79 and 80 / 94) on the Control of Noise Pollution Existing in the

Public and Workplace Environments.



3.10. Risk assessment

The EPC Contractor shall note that a Location Risk Assessment (LRA) has been undertaken for the Site and

this assessment has identified potential risks arising from the proximity of this site to the nearby Musandam

Gas Plant and most specifically the risks associated with releases of potentially flammable or toxic gases.

The EPC Contractor must be able to demonstrate compliance with all safety requirements to address

possible hazards. The potential safety hazards may include, but not necessarily be limited to, release of

explosive gases, release of toxic gases and proximity risk in case of explosion from MGP. The EPC

Contractor shall demonstrate that its designs take due account of these and any other identified Site specific

hazards and shall include risk assessments and provisions for avoidance of unnecessary evacuation of essential facilities such as control rooms following an unplanned event on the neighbouring site.

The design shall ensure safety of personnel and plant is paramount and shall include appropriate gas

detection and protection facilities. To the maximum extent practical, and without comprising safety, the plant shall be designed also to avoid unnecessary and spurious shutdowns.

3.11. HAZOP studies

The EPC Contractor shall run HAZOP studies once the preliminary designs (including P&IDs, PFDs and

SLDs) for all systems are complete.

These studies shall examine the design of the Works and determine whether the design during operation,

including abnormal modes of Works operation, complies with this Specification and GIP in terms of hazards

and operability.

Drawings and documents for HAZOPs shall be issued no later than six weeks prior to the date of the

HAZOP.

The scope of the studies shall include the configuration of the control system and the provision of adequate safeguards to permit safe operation.

The EPC Contractor shall give due consideration also to MGP requirements during the construction and

operation of the Plant. The design of the seawater intake/outfall, if required by Owner, must take into consideration potential marine movements, the off-shore gas export pipeline from MGP as well as any

impact on the seawater intake of the MGP facility.

The layout of plant and equipment within the Site boundary will be an important factor in ensuring compliance with safety hazard management. The EPC Contractor must satisfy itself that adequate

information is gathered to address any potential land and marine exclusion zone requirements.

3.11.1. Main power train and proprietary auxiliarie s

For the engine generators and their immediate proprietary auxiliaries, the EPC Contractor may satisfy this

requirement by providing details of the process followed to demonstrate that this has been done in the past

and that the design incorporates the outcomes of that process.

The Owner need not have been involved in this process.

3.11.2. Remaining Plant

For the remaining plant, the scope of the studies shall include the Works and its integration with off-site

services.



The Owner may participate in these remaining plant HAZOP studies and the designs shall be modified at

the EPC Contractors cost to incorporate the recommendations of the studies.

The EPC Contractor shall track and report on progress associated with resolving actions raised during the

HAZOP studies and present the Owner with a complete dossier showing the original minutes and the actions

taken to resolve issues raised.

3.12. Table of key dates

The key dates for the submission of plans, drawings, O&M manuals, general information, train

part i - owners technical specification - re - rev l- 22dec2013

Documents