OPEN JOINT-STOCK COMPANY “ TEPLOPROEKT ” Pre-Feasibility Study for Investment Project “Construction of the Second CCGT Unit with a Capacity of 450 MW at Navoi TPP” Volume IV. Book 1 Draft Impact Statement (DRAFT EIS) Tashkent 2011 OPEN JOINT-STOCK COMPANY “ TEPLOPROEKT ” Pre-Feasibility Study for Investment Project “Construction of the Second CCGT Unit with a Capacity of 450 MW at Navoi TPP” Volume IV. Book 1 Explanatory Note Technical Director Chief Engineer for the Project T.B. Baymatova K.I. Miralimov Tashkent 2011 Table of Contents Introduction ............................................................................................................................................................. 4 1. Environmental Status in the Location of Navoi TPS ........................................................................................... 6 1.1. Description of Physiographic and Climatic Properties ................................................................................. 6 1.2. Existing Sources of Impact .................................................................................................................... 8 1.3. Analysis of Sources of Environmental Impact from Functional Enterprises ....................................... 10 1.3.1. The Analysis of Hazardous Emitters ................................................................................................... 10 1.3.2. Water Consumption and Drainage ....................................................................................................... 15 1.3.3. Generation and Storage of Solid Waste ............................................................................................... 22 1.4. Atmospheric Air Condition ................................................................................................................. 27 1.6. Soils and Groundwater ........................................................................................................................ 30 1.7. Soils, Vegetation and Fauna .................................................................................................................... 36 1.8. Assessment of the Current Status of the Environment ........................................................................ 38 2. Socioeconomic Aspects of the Second CCGT Unit Construction at Navoi TPS............................................... 39 3. Environmental Analysis of the Design Solution ................................................................................................ 39 4. Analysis of Impact Types Identified by Release of Harmful Substances into the Environment ....................... 46 5. Analysis of Alternative Design Solutions .......................................................................................................... 52 6. Assessment of Impacts due to Withdrawal of Natural Resources from the Environment ................................. 53 7. Emergency Situations ........................................................................................................................................ 53 8. Exposed Facilities .............................................................................................................................................. 57 9. Nature of the Environmental Impact ................................................................................................................. 58 10. Recommendations on the Reduction of Unfavourable Environmental Impact ............................................... 61 11. Forecasted Changes in the Environment ......................................................................................................... 63 Conclusion ............................................................................................................................................................. 64 References ............................................................................................................................................................. 65 Appendices ............................................................................................................................................................ 67 Introduction The goal of this statement is to evaluate the environmental impact from construction of the second combined cycle gas turbine (CCGT) unit with a capacity of 450 MW at Navoi TPS. Pre-feasibility study of the 450 MW CCGT unit construction design at OJSC “Navoi TPS” was developed by OJSC “Teploelektroproekt”. Protocol Instruction No. 439 dated 21 March 2011 of the Cabinet of Ministers of the Republic of Uzbekistan and Terms of Reference issued by SJSC “Uzbekenergo” in May 2011 were the basis for the assessment. This draft EIS has been revised in accordance with requirements of the State Environmental Expertise Committee (Opinion No. 18/978з as of 23 November 2011): - bring the site layout plan in compliance with reality based on the field study findings in partnership with representatives from the State Inspection of Navoi Regional Nature Protection Committee; - to elaborate options for alternative site for the deployment of the second CCGT in accordance with requirements of Sanitary Regulations and Standards (SanPiN) No. 0246-08 of the Republic of Uzbekistan; - to take into account the sequence of operations during dismantlement of functional boiler units and commissioning of planned CCGT units to prevent a sudden increase in the environmental load during their joint operation for calculation of emissions generated by stationary sources at the station upon its reconstruction; - to calculate the impact area and maximum concentration of pollutants for most common scenarios of emergency situations with regard to the location of residential areas; - to calculate environmental assessment of accident consequences; - to develop measures aimed at reducing the concentration of pollutants in the impact area of TPS emissions down to prescribed allowances (quotas); - to hold public hearings regarding the construction of the second 450 MW CCGT unit with residents of “Yangiabad” and “Uyrot” village community assemblies and representatives of local self-governing bodies. Navoi TPS provides electric power to Navoi, Samarkand, and Bukhara Regions and heat to Navoi Region and city of Navoi. The operating life of 12 power generating units is 27-45 years leading to continuous deterioration of equipment and its reliability resulting in low cost-performance ration and greater likelihood of accidents with possible negative environmental consequences. OJSC “Navoi TPS” falls into Environmental Impact Category I (highest risk, para.37 The List of Activities Subject to State Environmental Expert Review, Annex No. 2 to Resolution No. 491 of the Cabinet of Ministers dated 31 December 2001). The construction of the second 450 MW CCGT unit in addition to the earlier designed 478 MW CCGT Unit at Navoi TPS will enable an increase in generating capacity of the station from 1,250 to 1,817.75 MW, a reduction in operational costs, more efficient energy conversion and reliable supply of electric power to customers, improvement in the environmental situation in the impact area of the station through replacement of two power generating units st. No. 3 and No. 8 with the new combined cycle units. The main objectives for this statement included: - assessment of the extent of negative impact of the TPS on the environment before and after construction of the CCGT unit; - environmental analysis of the design solution including identification of types, targets, and nature of the impact; and - a comparative environmental analysis of alternative options. Environmental impact assessment of the second CCGT unit at Navoi TPS was grounded on the analysis of the current environmental status, functional technological equipment, identification of sources of emissions, wastewater, and waste. The level of air pollution with emissions of Navoi TPS after the implementation of the proposed technological solution was calculated and compliance with State Committee for Nature Protection of the Republic of Uzbekistan was verified. “Regulation on the State Environmental Expert Review of the Republic of Uzbekistan” approved by Resolution No. 491 of the Cabinet of Ministers (CoM) of the Republic of Uzbekistan dated 31 December 2001 and stipulating the structure and scope of the environmental impact assessment as well as Resolution No. 152 of the CoM of the RUz dated 5 June 2009 “On Amending and Recognizing Some Decisions of the Government of the Republic of Uzbekistan as Invalid”. 1. Environmental Status in the Location of Navoi TPS 1.1. Description of Physiographic and Climatic Properties OJSC “Navoi TPS” (mailing address: “Yangi-arik” village community assembly, Karmana District, 210600, Navoi Region) is located 6 km northwest of the city of Navoi. The nearest residential buildings are located to the west of the TPS boundaries at a distance of 650m, while this distance decreased to 400m after construction of a 478MW CCGT unit (Figure Item 1,2). Areas bordering the TPS include: - in the north: agricultural land and summer cottages; - in the south: integrated energy service of NMMC, Tashkent-Bukhara highway and residential holdings of “Uyrot” village community assembly; - in the east: holiday village “Michurin”, the Zerafshan River and Navoi-Uchkuduk highways; - in the west: residential holdings of “Yangiabad” village community assembly and agricultural land. The station occupies an area of 100 ha stretching from