Environmental Impact Assessment Studies for the Proposed Exploratory Drilling in Aa-Onn-2009/3 Block Nelp-Viii at Teok Village, Jorhat District, Assam
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ENVIRONMENTAL IMPACT ASSESSMENT STUDIES FOR THE PROPOSED EXPLORATORY DRILLING IN AA-ONN-2009/3 BLOCK NELP-VIII AT TEOK VILLAGE, JORHAT DISTRICT, ASSAM REPORT UPGRADED AFTER PUBLIC HEARING Sponsor : M/s. Oil and Natural Gas Corporation Ltd. Assam & Assam Arakan Basin, Dhansiri Bhavan, Cinnamara, Jorhat - 785704 Prepared by : 142 IDA, Phase-II, Cherlapally, Hyderabad–500 051 [email protected], www.vimta.com (NABET - QCI Accredited, NABL Accredited & ISO 17025 Certified Laboratory, Recognized by MoEF, New Delhi) May, 2015 PREFACE M/s. Oil and Natural Gas Corporation Ltd. Assam & Assam Arakan Basin, Dhansiri Bhavan, Cinnamara, Jorhat - 785704 ENVIRONMENTAL IMPACT ASSESSMENT STUDIES FOR THE PROPOSED EXPLORATORY DRILLING IN AA-ONN-2009/3 BLOCK NELP-VIII AT TEOK VILLAGE, JORHAT DISTRICT, ASSAM For and on behalf of VIMTA Labs Limited Approved by : M. Janardhan Signature : Designation : Head & Vice President (Env) Date : May 21, 2015 The report has been prepared inline with the prescribed TOR’s issued vide No. F.No. J-11011/103/2012-IA II (I) dated 13th July, 2012 of Ministry of Environment and Forests, New Delhi. This report has been prepared by Vimta Labs Limited with all reasonable skill, care and diligence within the terms of the contract with the client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by agreement with the client. Environmental Impact Assessment report for Proposed Exploratory Drilling in AA-ONN-2009/3 Block NELP-VIII at Teok Village, Jorhat District, Assam Table of Contents Table of Contents ________________________________________________________________ Chapter Title Page ________________________________________________________________ Table of Contents TC-1 List of Figures TC-4 List of Tables TC-5 1.0 Introduction 1.1 Purpose of the Report C1-1 1.2 Identification of Project & Project Proponent C1-1 1.3 Brief Description of Project C1-2 1.4 Scope of the Study C1-10 2.0 Project Description 2.1 Introduction C2-1 2.2 Type of Project C2-1 2.3 Need for Exploratory Drilling C2-1 2.4 Project Location and Layout Details C2-1 2.5 Size or Magnitude of Operation C2-3 2.6 Proposed Schedule for Project Approval and Implementation C2-8 2.7 Technology and Drilling Process Description C2-8 2.8 Details of Project Utilities C2-11 2.9 Post Drilling Operations – Abandonment and Restoration C2-16 2.10 Sources of Pollution C2-17 2.11 Qualifications, Skills and Training Practice C2-22 3.0 Baseline Environmental Status 3.1 Introduction C3-1 3.2 Hydrogeology and Geomorphology C3-1 3.3 Landuse Studies C3-4 3.4 Soil Characteristics C3-10 3.5 Meteorology C3-13 3.6 Ambient Air Quality C3-25 3.7 Water Quality C3-29 3.8 Noise Level Survey C3-34 3.9 Ecological Studies C3-37 3.10 Demographic and Socio-economics C3-57 4.0 Impact Assessment and Mitigation Measures 4.1 Impact Assessment C4-1 4.2 Anticipated Impacts from the Project C4-2 4.3 Environment Management Plan C4-24 4.4 Monitoring Environmental Performance C4-31 4.5 Emergency Response and Contingency Planning C4-32 VIMTA Labs Limited, Hyderabad TC-1 Environmental Impact Assessment report for Proposed Exploratory Drilling in AA-ONN-2009/3 Block NELP-VIII at Teok Village, Jorhat District, Assam Table of Contents Table of Contents (Contd.) ________________________________________________________________ Chapter Title Page ________________________________________________________________ 4.6 Waste Management Plan C4-38 4.7 Drilling Site Restoration Plan C4-39 5.0 Analysis of Alternatives 5.1 Alternative for Technology C5-1 5.2 Alternatives for Project site C5-1 6.0 Environmental Monitoring Programme 6.1 Introduction C6-1 6.2 Environmental Monitoring and Reporting Procedure C6-1 6.3 Reporting Schedule of the Monitoring Data C6-3 6.4 Infrastructure for Monitoring of Environmental Protection Measures C6-4 6.5 Environmental Costs C6-4 6.6 Audit and Review C6-4 7.0 Additional Studies 7.1 Public Consultation C7-1 7.2 Risk Assessment Introduction C7-7 7.3 Recommendations to Mitigate Risk/Hazards C7-17 7.4 Disaster Management Plan C7-18 7.5 Emergency Response Action C7-24 7.6 Emergency Response Procedures C7-25 7.7 End of Emergency C7-42 7.8 Communications C7-42 8.0 Project Benefits 8.1 Improvement in the Physical Infrastructure C8-1 8.2 Improvement in the Social Infrastructure C8-1 8.3 Employment Potential C8-2 9.0 Administrative Aspects 9.1 Operational Philosophy C9-1 9.2 Health Safety and Environment C9-2 9.3 Environmental Organization and Personnel C9-4 VIMTA Labs Limited, Hyderabad TC-2 Environmental Impact Assessment report for Proposed Exploratory Drilling in AA-ONN-2009/3 Block NELP-VIII at Teok Village, Jorhat District, Assam Table of Contents Table of Contents (Contd.) ________________________________________________________________ Chapter Title Page ________________________________________________________________ 10.0 Summary and Conclusion 10.1 Location Details of the Project C10-1 10.2 Importance of the Proposed Project C10-1 10.3 Details of Exploration Drilling Operations C10-1 10.4 Baseline Environmental Status C10-2 10.5 Impact Assessment C10-5 10.6 Environment Management Plan C10-7 10.7 Environmental Monitoring Program C10-8 10.8 Risk Assessment and Disaster Management Plan C10-9 10.9 Project Benefits C10-9 10.10 Administrative Aspects C10-9 10.11 Conclusions C10-10 11.0 Disclosure of Consultants 11.1 Introduction C11-1 11.2 Vimta Labs Limited C11-1 List of Annexures Annexure-I Terms of Reference Letter and Compliance Annexure-II Applicable Environmental Standards Annexure-III Methodology for Sampling and Analysis Annexure-IV Land use Pattern Annexure-V Ambient Air Quality Levels Annexure-VI Demographic Details Annexure-VII Emission Calculations Annexure-VIII Public Hearing Proceedings Annexure-IX Pool Fire Calculations Annexure-X Secondary Data for Risk Analysis Annexure-XI Corporate Environment Policy VIMTA Labs Limited, Hyderabad TC-3 Environmental Impact Assessment report for Proposed Exploratory Drilling in AA-ONN-2009/3 Block NELP-VIII at Teok Village, Jorhat District, Assam Table of Contents List of Figures ________________________________________________________________ Figure Title Page ________________________________________________________________ 1.1 Index Map C1-3 1.2 Topographic Map Aa-Onn-2009/3 Block in Jorhat District C1-4 1.3 Google Map Showing Well Locations in Aa-Onn-2009/3 Block C1-5 2.1 Typical Layout of Well Site C2-5 2.2 Drilling Rig C2-10 2.3 Drilling Fluid Circulation System at Typical Rig C2-15 2.4 Typical Section View Of Drilling Cut And Drill Mud Collection Pit C2-20 3.2.1 Stratigraphy of North Assam Shelf, A & AA Basin C3-3 3.3.1 Satellite Imagery of the Study Area C3-8 3.3.2 Landuse Pattern Based on Satellite Data C3-9 3.4.1 Soil Sampling Locations C3-11 3.5.1 Wind Rose IMD Golaghat– Pre Monsoon Season C3-18 3.5.2 Wind Rose IMD Golaghat – Monsoon Season C3-19 3.5.3 Wind Rose IMD Golaghat – Post Monsoon Season C3-20 3.5.4 Wind Rose IMD Golaghat – Winter Season C3-21 3.5.5 Wind Rose IMD Golaghat- Annual C3-22 3.5.6 Site Specific Windrose Winter Season C3-24 3.6.1 Air Quality Sampling Locations C3-27 3.7.1 Water Sampling Locations C3-30 3.8.1 Noise Monitoring Locations C3-35 3.9.1 Ecological Sampling Locations C3-40 4.1 Short Term 24 hourly GLCs of SO2 C4-11 4.2 Short Term 24 hourly GLCs of NOx C4-12 4.3 Noise Level Contours C4-20 7.1(A) Notice for Public Hearing – Dainik Janambhumi C7-2 7.1(B) Notice for Public Hearing – Assam Tribune C7-3 7.2(A) Photographs Showing Public Hearing C7-4 7.2(B) Photographs Showing Public Hearing C7-5 7.3 Objectives of Risk Assessment C7-10 7.4 Methodology of MCA Analysis C7-11 7.5 Flow Chart for Evaluation of Consequences of Release of Flammable or Toxic Chemical C7-14 7.6 Emergency Classification C7-20 7.7 Contingency Plan for Onshore Blowout (Drilling Rig) C7-26 7.8 Typical Schematic of BOP Stack C7-29 9.1 Organizational Structure for Environmental Management C9-6 VIMTA Labs Limited, Hyderabad TC-4 Environmental Impact Assessment report for Proposed Exploratory Drilling in AA-ONN-2009/3 Block NELP-VIII at Teok Village, Jorhat District, Assam Table of Contents List of Tables Tables Title Page 1.1 Tentative Well Locations C1-2 1.2 Environmental Setting of Well Teok-C (1 Km Radius) C1-6 1.3 Environmental Setting of Well Teok-A (1 Km Radius) C1-7 1.4 Environmental Setting of Well Teok-G (1 Km Radius) C1-8 1.5 Environmental Attributes and Frequency of Monitoring C1-11 2.1 Tentative Well Locations C2-2 2.2 salient features of the proposed exploratory drilling in aa-onn-2009/3 block of Assam C2-3 2.3 Typical Water Requirements per Well Site C2-4 2.4 Details of DG Sets C2-6 2.5 Constituents of Water Based Mud (WBM) C2-6 2.6 Special Additives and Their Functions In Water Based Mud C2-7 2.7 Composition And Parameters Of Water Based Drilling Mud C2-7 2.8 Hole Size And Casing Details C2-9 2.9 Hazardous Waste Quantities Per Well Site C2-21 2.10 Hazardous Waste from Drilling Operations C2-21 3.3.1 Landuse Pattern in the Study Area C3-4 3.3.2 Landuse /Land Cover Classification System C3-5 3.3.3 Landuse Breakup Based On Irs Resourcesat-2 Liss3 Dated 31st January 2013 C3-7 3.4.1 Details of Soil Sampling Locations C3-10 3.4.2 Soil Analysis Results C3-12 3.4.3 Standard Soil Classification C3-13 3.5.1 Sensitivity of Meteorology Monitoring Equipment C3-14 3.5.2 Climatological Data Station IMD, Golaghat C3-15 3.5.3 Summary of the Meteorological Data Generated at Site C3-23 3.6.1 Details of Ambient Air Quality Monitoring C3-26 3.6.2 Summary of Ambient Air Quality Results C3-28