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EIA for BMDE Development well in Baramura Field, Tripura Final EIA Report Prepared for: ONGC Prepared by: SENES Consultants India Pvt. Ltd. August, 2015 EIA for BMDE development well in Baramura Field at Tripura Final EIA Report EIA for BMDE, Development Well in Baramura Field, Tripura M/s Oil and Natural Gas Corporation Limited For on and behalf of SENES Consultants India Ltd Approved by Mr. Mangesh Dakhore Signed by NABET-QCI Accredited EIA Coordinator for Offshore & Onshore Oil and Gas Exploration Position held Development and Production Date August 2015 The EIA report have been undertaken in compliance with the approved TOR issued by MoEF vide letter no. F. No. J-11011/313/2012- IA II (I) dated 22nd March, 2013.Information and content provided in the report is factually correct for the purpose and objective for such study undertaken. SENES/K-20233/ Aug 2015 i ONGC EIA for BMDE development well in Baramura Field at Tripura Declaration by Experts contributing to the “EIA for BMDE Development well in Baramura Field, Tripura.” I, hereby, certify that I was part of the EIA team in the following capacity that developed the above EIA. EIA Coordinator EIA Coordinator Name: Salil Das Name: Mangesh Dakhore Signature and Date: April’14-March’15 Signature and Date: March’15 – June’15 Contact Information: SENES Consultants India Pvt Ltd. IIIrd Floor, Tower B, Logix Technopark, Plot No. 5, Sector 127, Noida, UP Functional Area Experts: Involvement (period Sl No Functional Areas Name of expert/s Signature & Date & tasks) 1. Air Pollution (AP), Air Debanjan quality monitoring and Bandyopdhyay modelling (AQ), Noise April’14 - March, 2015 quality (NV) and Land use expert (LU) 2. Risk Assessment Expert Mangesh Dakhore April’14 - March, 2015 3. Socioeconomic Expert Ranjit Mukherjee April’14 - March, 2015 4. Air quality monitoring and Indrani Ghosh modelling (AQ), Noise April’14 - March, 2015 quality (NV),Ecology and Biodiversity (EB) Expert 5. Landuse Expert Dibyendu April’14 - March, 2015 Chakraborty SENES/K-20233/ Aug 2015 ii ONGC EIA for BMDE development well in Baramura Field at Tripura Declaration by the Head of the Accredited Consultant Organization I, MAINAK HAZRA, hereby, confirm that the above mentioned experts prepared the “EIA for BMDE Development well in Baramura Field, Tripura”. I confirm that I shall be fully accountable for any misleading information mentioned in this statement. Name: MAINAK HAZRA Designation: DIRECTOR Name of the EIA Consultant Organization: SENES CONSULTANTS INDIA PVT LTD. NABET Certificate No. & Issue Date: NABET/EIA/RA016/040 on 11th August, 2014 SENES/K-20233/ Aug 2015 iii ONGC EIA for BMDE development well in Baramura Field at Tripura Abbreviations ALARP As Low As Reasonably Practicable BIS Bureau of Indian Standards BOD Biological Oxygen Demand BOP Blow out Preventor Cd Cadmium CGWB Central Ground Water Board COD Chemical Oxygen Demand CPCB Central Pollution Control Board Cr Chromium CSR Corporate Social Responsibility Cu Copper DFO Divisional Forest Officer DG Diesel Generator DO Dissolved Oxygen EC Environmental Clearance EGIG European Gas Incident Group EGIG European Gas Pipeline Incident Data Group EIA Environmental Impact Assessment EMC Environment Management Cell EMP Environment Management Plan EPIs Environmental Performance Indicators EQIs Environmental Quality Indicators ERT Emergency Response Team ETP Effluent Treatment Plant GCS Gas Compressor Station GCS Group Gathering Station GLC Ground Level Concentrations HC Hydrocarbon HFL High Flood Level HDPE High Density Polyethylene HSD High Speed Diesel HSE Health, Safety and Environmental ITOPF International Tanker Owners Pollution Federation IUCN International Union for Conservation of Nature & Natural Resources KLD Kilo Liter per Day SENES/K-20233/ Aug 2015 iv ONGC EIA for BMDE development well in Baramura Field at Tripura KW Kilo Watt LEL Lower Explosive Limits LFL Lower Flammability Limit LOC Level of Concern LOC Level of Concern MoEF Ministry of Environment and Forests MSDS Materials Safety Data Sheets 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 NIHL Noise Induced Hearing Loss NOx Oxides of Nitrogen NRSA National Remote Sensing Agency O&G Oil & Gas OCS Oil Collection Station OGP Oil and Gas Producers ONGC Oil and Natural Gas Corporation Limited OREDA Offshore Reliability Data OSHA Occupational Safety and Health Administration Pb Lead PM Particulate Matter PMP Petroleum & Mineral Pipelines PPAP Pollution Prevention and Abatement Plan PPE Personnel Protective Equipments QCI Quality Council of India QRA Quantitative Risk Assessment RADD Risk Assessment Data Directory RF Reserved Forest RFCC Residual Fluid Catalytic Cracking SAR Sodium Adsorption Ratio SCADA Supervisory Control And Data Acquisition SO2 Sulphur Dioxide SOPs Safe Operating Procedures SPCB State Pollution Control Board SPL Sound Pressure Level SENES/K-20233/ Aug 2015 v ONGC EIA for BMDE development well in Baramura Field at Tripura SWMP Storm Water Management Plan TDS Total Dissolved Solid TSS Total Suspended Solids UEL Upper Explosive Limits UKOPA UK Onshore Pipeline Operators Association VOC Volatile Organic Compound WBM Water Based Mud WLS Wild Life Sanctuary WMP Waste Management Plan WOAD Worldwide Offshore Accident Databank SENES/K-20233/ Aug 2015 vi ONGC EIA for BMDE development well in Baramura Field at Tripura Executive Summary INTRODUCTION ONGC is to undertake an Environmental Impact Assessment (EIA) study for a single development well in Baramura Field in Tripura. The development and testing of hydrocarbons, constructing GCS and laying pipeline for hydrocarbon transportation proposed in Tripura is included under activities specified in Schedule (Activity 1b) of the new EIA Notification dated 14th September 2006. It requires Environmental Clearance (EC) is a pre-requisite from the Ministry of Environment and Forests (MoEF). SENES Consultants India Pvt Ltd – a NABET-QCI accredited firm has been entrusted with the task of preparing the EIA report for the proposed activities due to development drilling of wells BMDE in Boramura field in Tripura by ONGC. PROJECT DESCRIPTION Field Locations and Accessibility Baramura Field is concentrated in the Northern part of Tripura. National Highway-44 (NH- 44) is the lifeline of Tripura that begins from Sabroom in South and runs Northward through major towns and muffassils like Manu Bazaar, Santir Bazaar, Udaipur, Bisramganj, Bishalgarh, Hafania. It takes a turn from Agartala in the West towards Shillong in the East through Jirania and Teliamura. Different roads branching from this highway is used for accessing the different fields. The only airport in the State is at Singerbhil 12 km North-West of Agartala City that caters to the domestic sector. EXISTING ACTIVITY IN THE BLOCK Baramura, is a producing field of ONGC. LAND LEASE Development Well Drilling A total of 1.7ha of land is required for drilling each development well. The process of land acquisition differs with ownership. The proposed drilling point lies in the Baramura Debatamura Reserve Forest. Forest Land & Forest Clearance Land belonging to the Forest department is acquired for diversion through necessary permission i.e forest clearance. If land forms a part of the patta land granted to tribals as per The Scheduled Tribes and other Traditional Dwellers (Recognition of Forest Rights) Act, 2006, the adequate permission is obtained as per the Forest Rights Act, 2006. However, as per Amendment issued in Oct, 2014, no forest rights are likely to be recognized in case of plantations notified as forests less than 75years prior to Dec 2005 and located in villages SENES/K-20233/ Aug 2015 vii ONGC EIA for BMDE development well in Baramura Field at Tripura having no recorded population of Scheduled Tribes as per 2001, 2011 Census, even if the process stipulated in the FRA 2006 Act is initiated and completed. Approach Road Construction The land required for building approach road to the wells is bought from the private owners or leased from the Government authorities. The roads are handed over to the community once the drilling phase is completed. Human Settlement and R&R Issue R&R issues are not applicable to this project as habitations are not falling in the proposed site, which lies in forested area. PROJECT ACTIVITIES The proposed activity for a typical development well drilling involves Well site preparation, construction of access roads, Well drilling and testing. Site closure and decommissioning of wells not indicative of potential hydrocarbon reserves. The above activities will be completed within a time schedule of 6 months. The water consumption, generation of drill cuttings and drilling fluid is determined by depth and type of well. It is estimated that the wells will be drilled till a minimum depth of 2400- 2500m for which 900-1000m3 water will be consumed; 250-300m 3 of drill cutting and 1000- 1250 m3 of drilling fluid will be generated. It has been decided that uniform water-based mud system will be used during drilling of the wells. Eco-friendly synthetic based mud will be used only where water-based mud will not be suitable. Cuttings will then be stored in the HDPE lined pits and after completion of the drilling activities, cuttings will be tested for the content of hazardous nature. Based on nature of the drill cuttings, final disposal pathway will be finalized by ONGC. Drill cuttings and drill mud will be treated as per G.S.R 546 (E) dated 30th August 2005 to render them harmless. BASELINE ENVIRONMENTAL STUDIES The study area shows that the ambient air quality resembles rural settings where the parameters monitored (PM2.5, PM10, NO2, SOx) doesnot deviate from National Ambient Air Quality Standards. The mean values of methane and non-methane hydrocarbons ranged between 6-14 ppm and 2-5 ppm, respectively. The ambient noise measured does not exceed the stipulated daytime and night time Standard for Residential Areas. North Baramura range lies in West Tripura, Khowai and Sipahijala District and is almost 47 km (avg.