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' 29 November 2001 <br /> • AGE-NC Project No 95-0111 <br />' Page 2 of 4 <br />' without a sample preservative Additionally, water samples from each well were transferred into <br /> three chilled 40-m1 volatile,organic analysis (VOA)vials containing 0 5 ml 18%hydrochloric acid <br /> (HCI) as a sample preservative <br />' The_ samples were then labeled and placed in a chilled container for transportation. under <br /> _ chain-of custodyto McCampbell Analytical,Inc (MAI),a Cali fomia Department of Health Services <br />' (DHS)-certified analytical laboratory located in Pacheco,California Each sample was analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel(TPH-g and TPH-d)by EPA <br />' Methods 5030/8015 Modified and 3550/8015 Modified, respectively, <br /> • Volatile aromatic compounds-benzene,toluene,ethylbenzene and total xylenes(BTEX)and <br />' methyl tertiary-butyl ether(MTBE) by EPA Method 8020, and <br /> • Oxygenated compounds - di-isopropyl ether (RIPE), ethyl tertiary-butyl ether (ETBE), <br />' MTBE, tertiary-amyl methyl ether (TAME) tertiary-butyl alcohol (TBA) by EPA Method <br /> 8260 Modified <br />'• Samples collected from MW-1 and MW-4 were transported to BioJet Laboratory in Ione and <br /> analyzed for physicochemical properties and microbiological enumeration <br />' 3.0 FINDINGS <br />' Ground water elevation, flow direction, and gradient were determined from field data collected on <br /> 22 June 2001, the contaminant impact to ground water was assessed from the laboratory analytical <br />' data <br />' 3 1 GROUND WATER FLOW DIRECTION AND GRADIENT <br /> The elevation of ground water in each well was calculated by subtracting the depth to ground water <br />' from the surveyed well casing elevations (Table 1) I <br /> The depth to ground water ranged from 6 48 feet to 9 67 feet below the tops of the well casings <br /> Ground water elevations at the site ranged from 9 55 feet above mean sea level(MSL)in well MW-6 <br /> to 10 78 feet above MSL in well MW-3. Ground water elevations at the site decreased an average <br /> of 0 03 feet between the June 2001 and September 2001 sampling events Ground water levels were <br /> within the screened intervals ofwells MW-2,and MW-4 through MW-8 and approximately 0 33 feet <br /> and 1 33 feet above the screened intervals in wells MW-1 and MW-3, respectively <br /> Advanced GeoEnviroalnental Inc <br />