EIA Studies for Exploratory drilling at Pre-NELP Block AA-ONJ/2 DRAFT EIA/EMP REPORT M/s Oil and Natural Gas Corporation Ltd. EIA Studies for Pre-NELP Block AA- ONJ/2 (for Drilling 9 Exploratory Wells) For on and behalf of SENES Consultants India Ltd Approved by Mr. Salil Das Signed by Position held NABET-QCI Accredited EIA Coordinator for Offshore & Onshore Oil and Gas Exploration Development and Production Date December 10, 2013 The EIA report preparation have been undertaken in compliance with approved ToR issued by the MoEF vide letter no. J11011/91/2012-IAII (I) dated 13th July, 2012. Information and content provided in the report is factually correct for the purpose and objective of the study . SENES/K-20200/December 2013 b ONGC EIA Studies for Exploratory drilling at Pre-NELP Block AA-ONJ/2 Abbreviation ALARP As Low As Reasonably Practicable BOD Biological Oxygen Demand BOP Blow out Preventor Block Khoraghat Extension ML Block Cd Cadmium CGWB Central Ground Water Board COD Chemical Oxygen Demand CPCB Central Pollution Control Board Cr Chromium CSR Corporate Social Responsibility Cu Copper DG Diesel Generator DGH Directorate General of Hydrocarbons DMP Disaster Management Plan DO Dissolved Oxygen EC Environmental Clearance EIA Environmental Impact Assessment EMP Environment Management Plan ETP Effluent Treatment Plant FC Forest Clearance GGS Group Gathering Station GLC Ground Level Concentrations GoI Government of India HC Hydrocarbon HDPE High Density Polyethylene HSD High Speed Diesel HSE Health, Safety and Environmental IMD Indian Meteorological Department IUCN International Union for Conservation of Nature & Natural Resources KLD Kilo Liter per Day SENES/K-20200/December 2013 c ONGC EIA Studies for Exploratory drilling at Pre-NELP Block AA-ONJ/2 KW Kilo Watt MoEF Ministry of Environment and Forests NAAQS National Ambient Air Quality Standards NABET National Accreditation Board for Education and Training NABL National Accreditation Board for Testing and Calibration Laboratories NELP New Exploration Licensing Policy NH National Highway NOx Oxides of Nitrogen OCS Oil Collection Station O&G Oil & Gas ONGC Oil and Natural Gas Corporation Limited OSHA Occupational Safety and Health Administration Pb Lead PEL Petroleum Exploration License PM Particulate Matter PPE Personnel Protective Equipments PSC Production Sharing Contract PUCC Pollution Under Control Certificate QCI Quality Council of India QRA Quantitative Risk Assessment RF Reserved Forest SO2 Sulphur Dioxide SPCB State Pollution Control Board SPL Sound Pressure Level TDS Total Dissolved Solid TG Tea Garden TSS Total Suspended Solids VOC Volatile Organic Compound WBM Water Based Mud WLS Wild Life Sanctuary SENES/K-20200/December 2013 d ONGC EIA Studies for Exploratory drilling at Pre-NELP Block AA-ONJ/2 Table of Contents Executive Summary ................................................................................................................... i 1 Introduction ....................................................................................................................1 1.1 Background ....................................................................................................................1 1.2 Objective of the study ....................................................................................................1 1.3 Scope of the study ..........................................................................................................2 1.4 Structure of the EIA report ............................................................................................2 2 Description of the Project ..............................................................................................7 2.1 Overview ........................................................................................................................7 2.2 Objectives and Benefits of Proposed Exploratory Drilling Activities ...........................7 2.2.1 Project Objectives ..........................................................................................................7 2.2.2 Project Benefits ..............................................................................................................7 2.3 AA-ONJ/2 Field Location & Description ......................................................................7 2.3.1 Location .........................................................................................................................7 2.3.2 Accessibility ...................................................................................................................8 2.4 AA-ONJ/2 Block .........................................................................................................12 2.4.1 Environmental Settings of the Block ...........................................................................12 2.4.2 Existing Activity in Oil Field .......................................................................................15 2.4.3 Environmental Compliance .........................................................................................15 2.5 Well Locations and Environmental Settings................................................................15 2.5.1 Location of Wells .........................................................................................................15 2.5.2 Salient Features of the Wells .......................................................................................15 2.5.3 Environmental Settings ................................................................................................18 2.6 Project Activities And Schedule ..................................................................................36 2.6.1 Pre-drilling Activity .....................................................................................................36 2.6.2 Drilling Activity ...........................................................................................................40 2.6.3 Well Decommissioning ................................................................................................45 2.7 Utilities & Resource Requirements .............................................................................46 2.7.1 Power Supply ...............................................................................................................46 2.7.2 Water Consumption and Supply ..................................................................................46 2.7.3 Fuel Consumption and Storage ....................................................................................48 2.7.4 Manpower / Employment ............................................................................................48 2.8 Pollution Sources and Characterization .......................................................................48 2.8.1 Noise and Vibrations....................................................................................................48 2.8.2 Air Emissions ...............................................................................................................49 SENES/K-20200/December 2013 e ONGC EIA Studies for Exploratory drilling at Pre-NELP Block AA-ONJ/2 2.8.3 Waste water Treatment and Disposal ..........................................................................49 2.8.4 Generation, Treatment and Disposal of Solid Waste (Hazardous and Non- Hazardous) ...................................................................................................................50 2.9 Drilling Hazards ...........................................................................................................51 2.10 Project Cost ..................................................................................................................51 2.11 HSE Policy ...................................................................................................................51 3 Description of the Environment ...................................................................................52 3.1 Physical Environment ..................................................................................................52 3.1.1 Climate & Meteorology ...............................................................................................52 3.1.2 Ambient Air Quality ....................................................................................................54 3.1.3 Ambient Noise Quality ................................................................................................58 3.1.4 Physiography and Geology ..........................................................................................61 3.1.5 Hydrogeology ..............................................................................................................62 3.1.6 Ground Water Quality..................................................................................................63 3.1.7 Watershed and Drainage ..............................................................................................69 3.1.8 Surface water quality ...................................................................................................72 3.1.9 Land-Use ......................................................................................................................74 3.1.10 Soil Quality ..................................................................................................................76 3.1.11 Natural Hazards ...........................................................................................................80