Onshore Oil & Gas Development drilling and production in Dumduma- Pengeri Area in Tinsukia District under PMLs namely Mechaki PML, Borhapjan PML , Dumduma PML and Digboi PML Tinsukia District, Assam Final EIA Report 10 February 2021 Project No. 0426932 www.erm.com NABET Certificate No.: NABET/EIA/1922/RA 0177 dated August 31, 2020 and valid upto October 30, 2022 The business of sustainability Document details The details entered below are automatically shown on the cover and the main page footer. PLEASE NOTE: This table must NOT be removed from this document. Document title Onshore Oil & Gas Development drilling and production in Dumduma-Pengeri Area in Tinsukia District Document subtitle Final Report Project No. 0426932 Date 10 February 2021 Version 1.0 Author Salil Das and Team of FAEs Client Name Oil India Limited www.erm.com Client: Oil India Limited Project No.: 0426932 10 February 2021 Page 2 Signature page 10 February 2021 Onshore Oil & Gas Development drilling and production in Dumduma-Pengeri area in Tinsukia District under PMLs namely Mechaki PML, Borhapjan PML, Dumduma PML and Digboi PML Tinsukia District, Assam Final Environmental Impact Assessment Report Name: Salil Das Name: Debanjan Bandyopadhyay Job title: EIA Coordinator Job title: Partner ERM India Private Limited Building 10 I Tower A I 4th Floor I DLF Cyber City I Gurgaon I INDIA - 122002 +91 124 4170 300 (switchboard) © Copyright 2021 by ERM Worldwide Group Ltd and / or its affiliates (“ERM”). All rights reserved. No part of this work may be reproduced or transmitted in any form, or by any means, without the prior written permission of ERM www.erm.com Client: Oil India Limited Project No.: 0426932 10 February 2021 Page 3 Declaration by expert contributing to the EIA Report for Onshore Oil & Gas development drilling and production in Dumduma-Pengeri area in Tinsukia District under PMLs namely Mechaki PML, Borhapjan PML, Dumduma PML and Digboi PML. EIA Coordinator I, hereby, certify that I was a part of the EIA team in the following capacity that developed the above EIA. I also confirm that the prescribed ToR have been complied with and that the data submitted is factually correct. EIA Coordinator: Salil Das Signature and Date Period of involvement: October 2017--Ongoing Contact Information : ERM India Private Limited, Building No.10, Tower B, 3rd Floor, DLF Cyber City Gurgaon -122002 India,Tel:+91-124-4170300; Fax: +91-124- 4170301 Functional Area Experts (FAEs) S.N Functional Name of the Involvement Signature Area Expert 1 EIA Salil Das Coordination with experts; Coordinator compilation of EIA report. QA/QC of the EIA report. (October 2017-ongoing) 2 Air Pollution Dr. Debanjan Selection of air quality Bandyopadhyay monitoring stations, discussion with client on various air pollution control aspects, inputs for impact assessment from the proposed project and development of EMP. (October 2017-ongoing) 3 Water Dhritiman Ray Selection of water monitoring Pollution stations, interpretation of analysis results, , inputs for impact assessment and development of EMP. (October 2017-ongoing) 4. Air Quality Dr. Indrani Ghosh Modelling. Modelling Model input data related to emissions and micrometeorology interpretation of modelling results and development of EMP www.erm.com Client: Oil India Limited Project No.: 0426932 10 February 2021 Page 4 S.N Functional Name of the Involvement Signature Area Expert 5. Noise Quality Dr. Indrani Ghosh Undertaking Noise Quality Modelling; Selection of noise sampling locations for baseline monitoring, model input data, interpretation of modelling results and development of EMP. (October 2017-ongoing) 7. Socio- Tufail Khan Support for socio economic economic baseline, stakeholder environment consultations and impact assessment. (October 2017-ongoing) 8. Ecology and Dr. Abhishek Roy Ecological survey and Biodiversity Goswami assessment of flora and fauna and related impact assessment and development of EMP. (October 2017-ongoing) 9. Land use Dr. Karunakaran Assessment of land use impacts Nagalingam (October 2017-ongoing) Dibyendu Preparation of all maps Chakraborty including LU/LC and impact assessment. (October 2017-ongoing) 10. Risk Debanjan Conducting risk assessment Assessment Bandyopadhyay including frequency analysis, consequence analysis; development of Disaster Management Plan. (October 2017-ongoing) I, Neena Singh, hereby, confirm that the above mentioned experts prepared the EIA Study for EIA Study for Onshore Oil & Gas development drilling and production in Dumduma-Pengeri Area in Tinsukia District under PMLs namely Mechaki PML, Borhapjan PML, Dumduma PML and Digboi PML. I also confirm that the consultant organization shall be fully accountable for any misleading information mentioned in this statement. Signature: Name: Neena Singh Designation: Managing Director Name of the EIA consultant organization: ERM India Private Limited NABET Certificate No. & Issue Date: NABET/EIA/1922/RA 0177 valid upto 30th October 2020. www.erm.com Client: Oil India Limited Project No.: 0426932 10 February 2021 Page 5 Compliance of Approved Terms of Reference (ToR) for EIA Study The terms of reference (ToR) for conduct of EIA study as approved by EAC of MoEF&CC are included in Annexure 1.1. The ToR requirements and their inclusion in the EIA study have been described in Table 0.1. Table 0.1 ToR Compliance Sl ToR Point Compliance Reference Section No. in the EIA Report Standard ToR 1. Executive summary of a Incorporated at the beginning of the report. - project. 2. Project description, project Project Description- Drilling of 26 onshore exploratory Project Description: objectives and project and developmental wells, 3 nos. of production Refer Chapter 2 benefits. installations and laying of interconnecting pipelines in Dumduma-Pengri Area (DPA). The land required for the well sites and production facility will be procured from the local villagers through direct purchase. Generally, OIL will procure the required land through private negotiation. In few cases, OIL may request district authority to acquired land under LARR act 2013, if private negotiation is not successful. Land procurement will be done including crop compensation. No physical displacement will occur. Site Preparation & Construction of Drill site Site preparation will involve levelling, filling and consolidation of the site for staging equipment and machinery. Individual sites will be duly fenced. Preparation and construction of drill sites and production facilities will involve top soil scraping and storage for future use, elevating the drill platform by excavated material from the site and material brought from authorized quarry area. Reinforced Cement Concrete (RCC) will be used for the construction of foundation system. For making foundations of the main rig structure, cast in-situ bored under- reamed piles of specified lengths will also be used. Drilling & Testing The wells will be drilled upto 3900 m using a standard land rig or a “Mobile Land Rig” with standard water based drilling fluid treatment system. During drilling operations, drilling fluid (or ‘mud’) is pumped through the drill string down to the drilling bit and returns between the drill pipe–casing annulus up to surface back into the circulation system after separation of drill cuttings /solids through solids control equipment. www.erm.com Client: Oil India Limited Project No.: 0426932 10 February 2021 Page 6 Sl ToR Point Compliance Reference Section No. in the EIA Report Drill cuttings and wash wastewater generated will be stored on-site in HDPE lined pits. There will be other ancillary facilities like Drilling mud system, Effluent Treatment System (ETP), Cuttings disposal, Drill Cementing, equipment etc. and utilities to supply Power (DG sets), water, fuel (HSD) to the drilling process and will be set up as a part of the project. Logging operations will be undertaken to provide information on the potential type and quantities of hydrocarbons present in the target formations. Production Installations Three Production installations are planned within the Dumduma-Pengeri Area. The production installation will include Oil Collection System (OCS), Gas Compressor Station (GCS), Field Group Gathering Station (FGGS) or Early Production System (EPS). Project Objectives- Project Objectives- To explore and produce hydrocarbons’ safely Refer Section 2.2 To augment national production of oil and gas Project benefits- Project benefits- Provision of more royalty to Assam Government Refer Chapter 8 and more cess to Govt. of India Provision of more employment opportunity to local people Development of infrastructure (roads, culverts, bridges, schools etc.) in the area Increase in business opportunity for the local people Energy security for the country 3. Cost of project and period Total cost of the project would be Indian Rupees The cost of Project is of completion. 1109.40 crore. provided in Section 2.12. Drilling of a well at each location is expected to take Project timeline is three to four months. After development phase the provided in Section wells if converted to production wells will continue till 2.11. the life of the well. The production facilities are permanent facilities. The developmental drilling, construction of production facilities and pipelines would be conducted within 7 years. 4. Site details within 1 km of Site Details within 1 km of wells and production Site details provided the each proposed well, installations were identified interpretation of satellite in Section 2.4. any habitation, any other