MINUTES OF2ND RECONSTITUTED EXPERT APPRAISAL ...

Water based drilling fluid will be used. Cost of the project is Rs. 75.00 crores. Longitudeand latitude of the proposed wells are as given below:Well No. Longitude (E) Latitude (N)1 72 O 37’6.25” 23 O 20’44.4”2 72 O 36’43.8” 23 O 20’7.23”3 72 O 35’54.25” 23 O 20’5.78”4 72 O 38’26.98” 23 O 21’17.8”5 72 O 38’17.02” 23 O 21’49.42”6 72 O 38’5.62” 23 O 20’46.15”7 72 O 38’40.23” 23 O 19’51.6”8 72 O 36’31.69” 23 O 19’31.48”Additionally, PAs informed the Committee that ambient air quality monitoring wascarried out at 10 locations during February, 2012-March, 2012 and submitted dataindicates PM 10 (36-101ug/m 3 ),SO 2 (8-11.9 ug/m 3 ), NO x (10.0- 17.8 ug/m 3 ) and THCs(NS) (969-1130 ug/m3). Incremental concentration due to proposed project wasestimated to be PM 10 (0.15 ug/m 3 ), SO 2 (0.047 ug/m 3 ) and NOx (26.66 ug/m 3 ).(ii) M/s ONGC Ltd. have proposed for exploratory drilling in NELP – VII Block CB-ONN-2005/10 in District Bharuch in WesternOnshoreBasin in Vadodara. Area of the block is270 km 2 . No national park/wildlife sanctuary/eco-sensitive area is located within thestudy area. Drilling will be done upto depth of 3500-4000m. The approximately land arearequired for each well will be 110m x 110m. Water based drilling fluid will be used. Costof the project is Rs. 100.00 crores.Longitude and latitude of the proposed wells are asgiven below:Well Name Longitude (E) Latitude (N)B-Anor-1 72 O 54’25.875” 21 O 56’44.037”B-Anor-2 72 O 55’9.165” 21 O 53’13.197”B-Anor-3 72 O 54’49.571” 21 O 55’48.316”B-Samni-1 72 O 54’39.233” 21 O 51’19.816”B-Argema- 72 O 55’6.33” 21 O 50’24.833”1Well-6 72 O 54’25.875” 21 O 56’44.037”Well-7 72 O 50’25.00” 21 O 46’1.68”Well-8 72 O 56’35.24” 21 O 46’26.67”Additionally, PAs informed the Committee that ambient air quality monitoring wascarried out at 8 locations during March, 2012-April, 2012 and submitted data indicatesPM 10 (17-102ug/m 3 ),SO 2 (8-27.5ug/m 3 ), NO x (10.0-35.1ug/m 3 ) and THCs (NS) (1002-1430 ug/m3). Incremental concentration due to proposed project was estimated to bePM 10 (0.6ug/m 3 ), SO 2 (0.30ug/m 3 ) and NOx (52.89ug/m 3 ).Fresh water requirement will be 35 m 3 /day, which will be procured from tanker.Water based mud (WBM). Effluent will be generated around 3 m 3 /day. Effluent will betreated in effluent treatment plant (ETP) comprising equalization, chemical coagulation,flocculation and clarification by settling and residual unusable mud will be collected inlined pits and solar evaporated. Drill cutting (DC) will be separated from water basedmud (WBM) and washed properly and unusable drilling fluids (DF) will be disposed off inwell designed lined pit with impervious liner for solar drying. Disposal of drill cuttings and