Environmental Impact Assessment Mongolia: Darkhan Wastewater
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Environmental Impact Assessment Project Number: 37697-025 July 2014 Mongolia: Darkhan Wastewater Management Project Prepared by Environ LLC for the Asian Development Bank. This environmental impact assessment is a document of the borrower. The views expressed herein do not necessarily represent those of ADB's Board of Directors, Management, or staff, and may be preliminary in nature. Your attention is directed to the “terms of use” section on ADB’s website. In preparing any country program or strategy, financing any project, or by making any designation of or reference to a particular territory or geographic area in this document, the Asian Development Bank does not intend to make any judgments as to the legal or other status of any territory or area. Central WWP extension project in Darkhan county, Darkhan province 2 Central WWP extension project in Darkhan county, Darkhan province Unofficial translation of front page of DEIA Approved: Mr. Enkhbat D., General EIA Expert, MEGD Revision by: Ms. Bayartsetseg S., EIA Expert, MEGD A DETAILED ENVIRONMENTAL IMPACT ASSESSMENT REPORT FOR EXPANSION PROJECT OF CENTRAL TREATMENT PLANT IN DARKHAN-UUL PROVINCE DEIA performed by: DEIA licensed company Mr. Erdenesaikhan N., Director, Environ LLC Project Executing Agency: Ms. Erdenetsetseg R., Director, Apartments and Public Utility Policy Implementation Department, MCUD Local Administration: Mr. Azjargal B., Vice governor of Darkhan-Uul Province and Governor of Darkhan County Ulaanbaatar 2014 3 Central WWP extension project in Darkhan county, Darkhan province Table of Contents CHAPTER 1. DESCRIPTION OF THE PROJECT AND RELATED DATA ................ 11 1.1. General data of the Project ..................................................................................................... 11 1.2. The project description ............................................................................................................ 13 1.2.1. BASIC ACTIVATED SLUDGE PLANT ................................................................................... 13 1.2.2. SEQUENCING BATCH REACTOR (SBR) .......................................................................... 16 1.2.3. MEMBRAINE BIO-REACTOR SYSTEM ............................................................................... 20 1.2.4 THREE-SLUDGE SYSTEM, (A MODULE ORGANISED ACTIVATED SLUDGE SYSTEM) ................................................................................................................................................................ 21 1.2.5 REHABILITATION OF THE EXISTING WWTP .................................................................. 24 1.3. Project capacity ........................................................................................................................... 25 1.4. Project duration ............................................................................................................................... 27 1.5. Infrastructure of Project Area ................................................................................................... 27 CHAPTER 2. ENVIRONMENTAL BASELINE DATA AND ASSESSMENT OF PROJECT AREA ........................................................................................................................... 28 2.1 Geography ................................................................................................................................................. 28 2.2. Baseline indicators of climate and meteorology .............................................................. 28 2.2.1. Climate indicators .................................................................................................................................. 28 2.2.2. Precipitation ............................................................................................................................................. 29 2.2.3. Air pressure, humidity and wind ..................................................................................................... 30 2.2.4. Seasonal climate variations ............................................................................................................. 33 2.2.6. Solar radiation ......................................................................................................................................... 34 2.3. Earth surface and underground ........................................................................................... 34 2.4. Air quality ....................................................................................................................................... 34 2.5. Soil quality ..................................................................................................................................... 39 2.5.1. Record of soil outlook (morphology) ........................................................................................ 39 2.6. Surface and underground water........................................................................................... 45 2.6.1. Surface water ...................................................................................................................................... 45 2.6.2. Resource of ground water and quality .................................................................................... 48 2.7. Vegetation ...................................................................................................................................... 52 2.8. Fauna ................................................................................................................................................ 56 2.9 Historical and cultural items ................................................................................................... 68 CHAPTER 3. INTERMEDIATE PRODUCT AND WASTE................................................ 69 o Solid wastes ....................................................................................................................................... 70 CHAPTER 4. ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES ........ 71 4.1. Scope of the survey ................................................................................................................... 71 4.1.1. Methodology to define environmental potential impacts ............................................... 71 4.2. Potential and main environmental impacts ..................................................................... 71 4.3. Adverse impacts of the project ............................................................................................. 76 4.3.1. Impacts on air quality .......................................................................................................................... 78 4 Central WWP extension project in Darkhan county, Darkhan province 4.3.2. Impacts on soils ..................................................................................................................................... 78 4.3.3. Impacts on surface and ground water ........................................................................................ 79 4.3.4. Impacts on vegetation ......................................................................................................................... 79 4.3.5. Impacts on fauna ................................................................................................................................... 80 4.3.6. Social-economy impacts .................................................................................................................... 80 FIVE. MITIGATION MEASURES AND GUIDANCE ........................................................... 81 5.1. Gguidance on negative impacts mitigation ..................................................................... 81 5.1.1. Air quality ............................................................................................................................................... 81 5.1.2. Impacts on soil .................................................................................................................................... 82 5.1.3. Water quality ........................................................................................................................................ 83 5.1.4. Vegetation ............................................................................................................................................. 84 5.1.5. Fauna ...................................................................................................................................................... 84 5.1.6. Social-economic measures .......................................................................................................... 84 5.1.7 Mitigation measures for health adverse impacts ............................................................... 85 CHAPTER 6. CONCLUSION ..................................................................................................... 86 CHAPTER 7. ENVIRONMENTAL MANAGEMENT PLAN ............................................... 87 7.1 Environmental Protection Plan .............................................................................................. 89 7.1.3 Prevention from water contamination ....................................................................................... 95 7.1.4 Impacts on vegetation ...................................................................................................................... 97 7.2 Environmental monitoring mechanism .............................................................................