Oil and Natural Gas Corporation Limited
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OIL AND NATURAL GAS CORPORATION LIMITED ENVIRONMENTAL IMPACT ASSESSMENT/ ENVIRONMENTAL MANAGEMENT PLAN FOR Conversion of 37 Exploration Wells & laying of Associated Flowlines, Involving Construction of Well Manifold At Kunjaban And Sundalbari And Pipeline At District North Tripura [ToR Letter: J-11011/60/2017-IA.II(I) dated 31st May 2017] [ToR Amendment Letter: J-11011/60/2017-IA II(I) dated 20th December 2018] [Study Period: 1st October 2018 to 31st December 2018] [Schedule 1 (b) Category–“A” as per EIA Notification 2006] APPLICANT CONSULTANT Oil and Natural Gas Corporation ECO CHEM SALES & Limited SERVICES ONGC, 4th Floor, Tower A, Pandit Deendayal Office floor, Ashoka Pavilion Upadhyay Urja Bhavan, Plot No 5, Vasant ‟A‟, New Civil Road, Surat, Kunj, Nelson Mandela Marg, New Delhi 395001. (QCI/NABET Accredited 110070. No. NABET/EIA/2023/RA 0181) E-mail: [email protected] E-mail: [email protected] Contact No: 0 98682 82200 Contact No: +912612231630 April – 2021 Doc. No: 2018_ECSS_EIAI2_1800007 EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) UNDERTAKING BY PROJECT PROPONENT Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 i EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) UNDERTAKING BY CONSULTANT Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 ii EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 iii EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 iv EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 v EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 vi EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) EXECUTIVE SUMMARY 1. Project Name and Location Name: Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold. Address: At Kunjaban & Sundalbari and Pipeline at North Tripura. 2. Products & Capacities. If expansion proposal then existing products with capacities and reference to early EC. 6.0 MMSCMD Natural gas. 3. Requirement of Land, Raw Material, Water, Power, Fuel with Source of supply (quantitative) Land Requirement: 1.7 ha of land area has been acquired for each wells i.e. total land acquired for 37 wells will be 62.9 ha. PML Name Area (Km2) Agartala Dome (AD-4) 32.580 Agartala Dome 15.75 Agartala Dome Extension II 160.86 Manikyanagar Sonamura Ext I 168.55 Konaban 33.0046 Kunjaban 288 Sundalbari Agartala Dome 301 Tichna 195.410 Raw Material: Not applicable Water: No additional domestic water will be required during the production as during Production manpower will be managed from the existing manpower in the connected installations. Hence no additional load on water sources of Tripura State. Power: The power requirement for production shall be sourced by state electricity board and stand by from 62 kVA DG sets during emergency. Fuel: 5-6 M3 of HSD will be required for DG. Set 4. Process Description in brief, specifically indication the gaseous emission, liquid effluent and solid/hazardous waste Process Description: Conversion of 37 No. Exploratory Wells for Development Construction of 2 pipe manifold at Kunjaban 8‟& 6‟ and Sundalbari 8‟& 6‟ Flow-lines and Gas Grid Network. Flue Gas Emission from Proposed Plant: Flue gas emission from proposed D.G set having capacity 62 kVA in case of emergency and from flaring. Solid and Hazardous Waste generated are as follows: Waste oil and lead acid batteries shall be generated. Solid and hazardous waste will be handled as per the hazardous and other wastes (management and trans boundary movement) rules, 2016. 5. Measures for mitigating the impact on the environment and mode of discharge or disposal No additional generation of wastewater as no drilling activity, produced water will be generated during gas processing which will be treated in ETP. 6. Capital Cost of the Project, Estimated time of completion Rs. 313.76 Crores is estimated for proposed activity and estimated time for completion will be 3-4 months for each wells. 7. Site selected for the project- Nature of land – Agricultural (Single/double crop), barren, Govt/Private land, status of is acquisition, nearby (in 2-3 km) water body, population, with in 10 km other industries, forest. Eco-sensitive zones, accessibility. Proposed activity will be done on private lease land. Haora River at 1.35 km in SE from Well (KUAC), Gongor River at 5.00 km in W from Well (RODJ), Gomati River 1.00 km in SE from Well (SDAC), Salda River at 2.79 km in S from Well (RODJ), Muhuri River at 0.60 km in N from Well (GOAK), Juri River at 4.96 km in N from Well (KHBJ & KHBE). Trishna WLS at 11.37 km in W from well (GOAK) Sipahijala Wildlife Sanctuary at 5.57 km in SE from well (ROBB). Unakoti Reserve forest at 10 km in NW from well (KHBJ & KHBE), Deo Reserve forest at 10 km in S from Well (KHBJ & KHBE). 8. Baseline environmental data – Air quality, Surface and Ground water quality, Soil characteristic, Flora and Fauna, Socio-Economic condition of the nearby population. As per the baseline study results of study area gaseous parameters (PM2.5: 18.3 – 35.9 µg/m3, PM10: 37.6– 74.3 µg/m3, SOx: 3.8 – 8.6 µg/m3, NOx: 10.9 – 20.9 µg/m3, etc.) are below the standard norms prescribed by NAAQS. Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 vii EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) Surface water COD (8-18 mg/L) and BOD (<4-6 mg/L) values were found more than the expected value. Ground water results of tested parameters (TDS: 84 to 122 mg/L, Total Hardness: 42 -62 mg/L, Total Alkalinity (36 – 56 mg/L) for all locations meet with the standard IS 10500 – 2012. As per soil analysis data (pH: 7.12 – 7.74, Total nitrogen: 0.048 – 0.072 %, Total Phosphorous: 275.5 – 385.3 kg/ha, etc.) it is concluded that surface soils are saline. Almost all the villages have more than 50 % people as non-workers. 9. Identification of hazardous in handling processing and storage of hazardous material and safety system provided to mitigate the risk. After identifying hazards in Conversion of 37 exploration wells. Few recommendation are suggested: BOP must be checked monthly by competent person and tagging system should be adopted. Durability of pipelines shall be ensured by competent person every quarterly as per the IS standards, and reports shall be recorded. Weekly blow-out drills must be conducted to test reliability of BOP and drill team preparedness 10. Likely impact of the project on Air, Water, Land, Flora-fauna nearby population. Negligible impact due to flue gas as operation of DG. Sets during emergency only. No major impact on Land use and land cover. 11. Emergency preparedness plan in case of natural or in plant emergencies. It is recommended that the DMP to be assimilated into the actual operations prior to commencement of the project work. Mock drill should be conducted at periodic intervals to ensure the efficacy of the DMP. ONGC has well developed DMP/ERP assimilated with district and national level Disaster Management Plan, etc. 12. Issues raised during public hearing (if applicable) and response given Public hearing issues is been incorporated in the chapter 7 of EIA/EMP report. 13. CSR/CER plan ONGC shall follow the CSR/CER rules and do the needful after receiving proposal through the District Administration. 14. Occupational Health Measures Personnel protective equipment such as safety shoes, safety goggles, hand gloves, gum boots, safety helmet, and breathing apparatus set kit will be given to all workers and staff. Safety awareness programs will be conducted. 15. Post Project Monitoring Plan Post project environmental monitoring is/will be done as per MoEFCC/CPCB/SPCB guidelines by following recommended/standard method approved by MoEFCC/CPCB/SPCB. Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 viii EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) ANNEXURE S. No. Document Name 1. a. ToR Letter b. Amended ToR Letter 2. a. Existing EC‟s b. Certified EC Compliance 3. Consent to Operate 4. Corporate Environment Policy 5. HSE Policy 6. Corporate E-waste Policy 7. DMP Report 8. Manifold Equipment list and other 9. Public Hearing MoM 10. Nabet Certificate of Consultant 11. MoEFCC Notification dtd. 19/02/2021 for Sepahijala Wildlife Sanctuary Eco Chem Sales & Services, Surat 2018_ECSS_EIAI2_1800007 ix EIA/EMP Report For Conversion of 37 Exploration Wells & laying of Associated Flowlines, involving construction of Well Manifold at Kunjaban & Sundalbari and Pipeline by Oil and Natural Gas Corporation Limited (ONGC) 1 INTRODUCTION 1.1 PRELUDE EIA studies are very important for any developmental activity to be taken into consideration.