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01 July 2004 <br /> AGE-NC Project No 02-0950 <br />' Page 2 of 4 <br /> containing 0 5 ml of hydrochloric acid as preservative, one-liter amber glass containers without a <br />' sample preservative and 16-oz plastic bottles containing 5 milliliters of nitric acid as a sample <br /> preservative After collection, the samples were properly labeled, placed In a chilled container and <br />' transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL), a California <br /> Department of Health Services-certified analytical laboratory, for analysis The samples were <br /> analyzed for <br />' • Total petroleum hydrocarbons as gasoline (TPH-g) and diesel (TPH-d) In accordance with <br /> EPA Method 8015 Modified, <br />' • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and the volatile organic <br /> compounds methyl-tertiary-butyl ether(MTBE), tertiary butyl alcohol (TBA), di-isopropyl <br /> ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), <br />' 1,2-dichloroethane (1,2-DCA) and 1,2-dibromo ethane (EDB) in accordance with EPA <br /> Method 8260, and <br /> t • Total lead In accordance with EPA Method 6010B <br /> i23 PURGE WATER DISPOSAL <br /> On 13 January 2004 American Valley Waste OII, Inc of Delhi, CA collected approximately 210 <br /> gallons of purge water from the site The purge water was transported under non-hazardous waste <br /> manifests to Seaport Environmental of Redwood City, CA an California EPA-approved disposal <br /> facility A copy of the non-hazardous waste manifest can be found In Appendix C <br />' 3.0. FINDINGS <br /> Ground water elevation, flow direction, and gradient were determined from field data collected on <br />' 21 January 2003 The contaminant Impact to soil and ground water was quantified from the <br /> laboratory analytical data <br /> t3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the January 2004 sampling event, depths to ground water ranged from 18 85 (MW-3) <br /> feet to 19 15 (MW-2) feet below the tops of the well casings Ground water elevation at the site <br /> averaged approximately 11 47 feet below mean sea level (MSL) which Indicated an Increase In <br />' groundwater elevation of approximately 1 06 feet between October 2003 and January 2004(Table 1) <br /> Advanced Geo Environmental,Inc <br /> t <br />