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I <br /> 13 June 2003 <br /> • AGE-NC Project No 97-0249 <br /> Page 3 of 8 <br />' minimum of 15 minutes to purge the well, a sample was collected directly from the running water <br /> Into the above sample containers <br /> r2 3 LABORATORY ANALYSIS OF GROUND WATER SAMPLES <br /> Each ground water sample was logged on a chain-of-custody form,placed in a chilled container and <br /> I transported to a California Department of Health Services (DHS)-certified laboratory for analysis <br /> for <br /> I • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) by EPA Methods 5030/8015C, <br /> Benzene,toluene,ethylbenzene and xylene(BTEX)and methyl-tertiary butyl ether(MTBE) <br /> by EPA Method 8021B, and <br /> I • 1,2-Dlchloroethane (1,2-DCA), ethylene dlbromlde (EBD), tertiary butanol (TBA), dl- <br /> Isopropyl ether (DIPE), ethyl tert butyl ether (ETBE), Cert amyl methyl ether (TAME) and <br /> MTBE by EPA Method 8260B, <br /> 3.0. FINDINGS <br /> I Ground water elevations general flow direction and the estimated adient were determined from <br /> g �' <br /> I field data collected on 24 March 2003, the contaminant Impact to ground water was quantified by <br /> laboratory analysis of water samples collected on 25 and 26 March 2003 <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT <br /> The depths to ground water from the purged wells were measured at between 9 04 (MW-6) and <br /> I 12 23 (MW-7E) feet below the top of well casings, ground water elevation was calculated to be <br /> between 2 17 feet (MW-9A/B) feet and 2 62 (MW-1OF) feet below mean sea level Generally, <br /> ground water elevation at the site increased an average 1 8 feet between the December 2002 and the <br /> March 2003 ground water monitoring events <br /> I <br /> Advanced GeoEnvironmental,Inc <br />