Chapter-III(59-80) - Pollution Control Board, Assam

EIA & RA STUDY FOR NAPHTHA SPLITTER PROJECT AT NUMALIGARH REFINERY LIMITEDBaseline Environmental StatusTable - 3.41CHARACTERISTICS OF GROUND WATER SAMPLESPeriod : December 2007 to February 2008Sl.No.PARAMETERS(Result are expressed in mg/l, unless otherwise stated)Hand PumpBaruagaonANALYSIS RESULTSHand PumpKomargaonHand PumpRong Bong(Desirable /PermissibleLimit)IS: 10500PHYSICAL1 Temperature, O C 22.2 19.1 25.8 -2 pH 6.5 6.2 6.4 6.5-8.53 Colour,HU 2 2 2 5/254 Turbidity, NTU 2 3 2 5/105 Total Dissolved Solids 223 227 158 500/2000CHEMICAL1 Total Alkalinity as CaCO 3 124 74 70 200/6002 Total Hardness as CaCO 3 82 78 52 300/6003 Calcium Hardness as Ca 20 18 12 75/2004 Magnesium Hardness as Mg 8 8 6 305 Chloride as Cl 10 16 8 250/10006 Sulphate as SO 4 40 70 35 200/4007 Nitrate as NO 3 1.2