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1 <br /> ' r - <br />' 25 August 2004 <br /> AGE-NC Prod ect No 01-0877 <br />' Page 2 of 4 <br /> 1 , <br />' analysis (VOA) vials containing 0 5 ml 18%hydrochloric acid as a sample preservative and one 1- <br /> liter amber bottle without preservative After collection, the samples were properly labeled,placed <br /> in a chilled container and transported under chain-of-custody to Cal Tech Environmental Laboratory <br />' (CTEL) a State of California Department of Health Services (DHS)-Environmental Laboratory <br /> Accreditation Program certified (#2424) analytical laboratory, for analysis The samples were <br /> ' analyzed for ' <br />' Total petroleum hydrocarbons as gasoline(TPH-g),diesel(TPH-d)and motor oil (TPH-mo) <br /> in accordance with 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-di chloro ethane (1,2-DCA) and 1,2-dibromoethane (EDB) in accordance with EPA <br /> Method 8260 <br /> 1 <br /> 2 3 WASTE DISPOSAL <br /> On 05 Ma 2004, Slaby Sales of Borrego. Springs, California collected approximately 100 gallons <br />' of purge water and 15 soil drums from the site The purge water and soil was transported under <br /> non-hazardous waste manifests to Filter Recycling Services, Rialto, California an EPA-approved <br /> disposal facility Copies of the non-hazardous waste manifests can be found in Appendix C <br /> 3.0. FINDINGS <br />' Ground water flow direction, elevation, and gradient were determined from data collected in the <br /> field The hydrocarbon impact to ground water was quantified by the laboratory data obtained from <br />' the ground water samples <br />' 3 1 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the April 2004 sampling event, depths to ground water ranged from 26 27 feet to <br />' 26 95 feet below the tops of the well casings (Table 1) The average ground water elevation at the <br /> site was approximately 16 56 feet below mean sea level (MSL) which indicates an increase in the <br /> static ground water elevation of approximately 0 67 feet since the last monitoring event Ground <br />' water flow was inferred to be towards the northeast under a gradient of approximately <br /> . 0 004 foot/foot(Figure 3) During the April 2004 monitoring event, ground water level was within <br />' Advanced GeoEnvironmental,Inc <br />