Environmental Impact Assessment for Sohar-II Independent Power Project
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uez Tractebel S.A. 31st Floor, API Tower, Sheikh Zayed Rd. PO Box 66235, Dubai United Arab Emirates Environmental Impact Assessment for Sohar-II Independent Power Project Project No. HMR/2826 July 2010 HMR Environmental Engineering Consultants PO Box: 1295, CPO Seeb, PC: 111 Sultanate of Oman Tel: (968) 24618800, Fax: (968) 24618811 [email protected] www.hmrenv.com Sohar-II Power Plant Environmental Impact Assessment Suez Tractebel S.A. Consortium Sohar Industrial Port Area Environmental Impact Assessment for Sohar-II Independent Power Project Project No. HMR/2826 July 2010 Issue and Revision Rev Date Prepared by Checked by Approved by Description R1 20.06.2010 AJC, KB BK BK First Draft R2 06.07.2010 AJC BK BK Second Draft This document has been prepared for the above titled project and it should not be relied upon or used for any other project without the prior written authority of HMR Environmental Engineering Consultants. HMR Environmental Engineering Consultants accepts no responsibility or liability for this document to any party other than the client for whom it was commissioned. HMR Environmental Engineering Consultants i HMR/2826 Sultanate of Oman July 2010 Sohar-II Power Plant Environmental Impact Assessment Suez Tractebel S.A. Consortium Sohar Industrial Port Area EXECUTIVE SUMMARY Background The Oman Power and Water Procurement Company SAOC (OPWP) is a government owned company responsible for meeting the demand for electricity and water in the Sultanate of Oman. The demand for electricity and water has been increasing in the Sultanate, especially in areas experiencing industrial and commercial developments, viz., Sohar, Capital Region, etc. OPWP conducts annual reviews and studies to analyse this demand and supply pattern. Presently, such studies have indicated an increased requirement of 1,300 MW electric power from CY 2012 onwards in the Batinah and Capital Regions. OPWP will meet the above demand for additional power by constructing two Independent Power Projects (IPPs), viz., Sohar Phase II (Sohar II) and Barka Phase III (Barka III). Through a competitive tendering process, OPWP has awarded the build-own-operate (BOO) contract for the two IPP projects to a consortium (STSA Consortium) formed by Suez- Tractebel S.A (SSTA), Multitech LLC (Suhail Bahwan Group) (Multitech), Sojitz Corporation (Sojitz), Shikoku Electric Power Co. (Yonden), and Public Authority for Social Insurance (PASI). STSA Consortium will establish a project company which will be responsible for the development, financing, construction, ownership and operation of IPPs. STSA Consortium has awarded the Engineering, Procurement and Construction (EPC) contract to a consortium of Siemens Energy Sector and GS Engineering & Construction (Siemens-GS). As per the categorization of projects by the Ministry of Environment and Climate Affairs (MECA), the proposed projects are classified under Group 1, ‘Industrial Projects’, requiring detailed evaluation of the environmental impacts and identification of appropriate control measures to mitigate significant impacts to obtain the Preliminary Environmental Permit (PEP), prior to commencing construction. Accordingly, STSA Consortium is required to undertake an Environmental Impact Assessment (EIA) study; and has commissioned HMR Environmental Engineering Consultants (HMR) to conduct EIA studies for the Sohar II and Barka III IPPs. The present report discusses the EIA study conducted for Sohar II IPP. Regulations The EIA study has been conducted as per the “Guidelines on Environmental Impact Assessment” issued by Directorate General of Environmental Affairs (DGEA) at MECA. Thus the planning and development of the project will be in compliance with Omani regulations on environmental protection and pollution prevention. In addition, applicable international regulations such as those contained in the environmental directives of World Bank and environmental standards provided by United States Environmental Protection Agency (USEPA) will be used as appropriate to ensure that the technology, equipment and operations selected for the project are capable of meeting national and international HMR Environmental Engineering Consultants ii HMR/2826 Sultanate of Oman July 2010 Sohar-II Power Plant Environmental Impact Assessment Suez Tractebel S.A. Consortium Sohar Industrial Port Area environmental requirements. Further, the project will take into account the World Bank Equator Principles in order to address the significant environmental and social impacts. Furthermore, the project will also follow the requirements of international engineering standards and codes as per contractual agreement with the technology providers. Project Description Overview The proposed Sohar II IPP will be a combined cycle plant with a capacity of about 745 MW. The plant will mainly comprise two Gas Turbine (GT) Units, two Heat Recovery Steam Generators (HRSG) Units and one Steam Turbine (STG) Units. The GT Units and HRSG Units will be designed for enhanced thermal efficiency with each GT Unit having an independent HRSG Unit, which will be provided with supplementary firing facilities. The primary fuel for the project will be natural gas, with diesel oil as the back up fuel. In the GT Units, the fuel will be burned with excess air. The resulting exhaust gases will be passed through the HRSG Units, wherein the waste heat of the exhaust gas will be recovered to generate steam. The HRSG Units will be fed with demineralised seawater for steam generation. The steam generated in the HRSG Units will be routed to the ST Unit to generate additional electricity. The exhaust gases leaving the HRSG Units will be released to the atmosphere through the attached main stack (two main stacks for two GT-HRSG trains). Each GT Unit will be provided with a bypass stack through which the exhaust gases may be released to the atmosphere during upset / emergency conditions. Facility Location The proposed Sohar II IPP will be located within Sohar Industrial Port Area (SIPA), on Plot # 19B, (about 94,000 m2 land area), which lies adjacent to the existing Sohar I Independent Water and Power Project (IWPP). The temporary laydown area (TLA) for the Sohar II IPP construction phase will be located on a 60,000 m2 area located south of Plot#23 (Sohar Aluminium Power and Desalination Plant) and northeast of Plot#21A. Manpower and Construction Camps The peak labour requirement during project construction is estimated to be about 900. Most of the employees will be sub-contractor staff engaged by the EPC contractor for executing various civil, mechanical and electrical works. The manpower required during normal operation of the facilities will be about 40, working in 3 shifts. The plant operations will be mostly controlled by Distributed Control System or other remote control systems and therefore, will not require frequent manual interventions on the field for control of the plant HMR Environmental Engineering Consultants iii HMR/2826 Sultanate of Oman July 2010 Sohar-II Power Plant Environmental Impact Assessment Suez Tractebel S.A. Consortium Sohar Industrial Port Area operations. The control room will be typically manned for monitoring plant operations and for necessary operational control. In addition, inspection and maintenance personnel will be required for periodic inspection and maintenance of the plant. The accommodation for plant personnel during both the construction and operation phases will be arranged by the contractors/STSA Consortium at existing/available local apartments or rented accommodation facilities in Sohar. No new accommodation camps/facilities will be installed as part of the project development. Environmental Baseline Site Characteristics The project site is located within SIPA, which covers an approximate land area of 2,000 hectare (20 km2), located on the Batinah coast. SIPA is situated about 20 km from Sohar town and 240 km northwest of Muscat. A number of industries are planned to be put up in the industrial area, which currently features fully operational businesses along with large scale construction activities. Topography The proposed project site is relatively flat and featureless. The site has a ground elevation of 2 to 4 m above mean sea level. Prior to the development of SIPA, the area was flat and similar to other undeveloped areas along the Batinah coast. The industrial area was built-up to the present elevation using dredged material, recovered during development of coastal facilities of the industrial area. Climate Like the rest of the country, the Batinah region experiences a hot and humid climate. The nearest meteorological station to the site is at Majis, which is located about 1 km southeast of the site. The data recorded from Calendar Year (CY) 2006 through 2008 shows higher mean ambient temperature varies between 15 and 35 ºC. The maximum temperature occurs during the months from May to August with the peak temperature touching up to 38 ºC; while the minimum occurs during November to February going as low as 13 ºC. The mean relative humidity in the area varied between 45 and 80 % during the three years from 2006 to 2008. The minimum and maximum relative humidity recorded during the three years were 27 % (May 2008) and 87 % (August 2007), respectively. The mean wind speed ranged between 5 and 6 knots, with the predominant wind direction being towards east during summer, and towards west-southwest during winter. Most of rainfall occurred during the winter months between December and April/May. HMR Environmental Engineering Consultants