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�.emw ,V% e ' <br /> t ¢ <br /> f <br /> E- MI <br /> The,Customer Company <br /> Page 2 <br /> understood that no further work with respect to subsurface hydrocarbons has been <br /> y 5, 1988 groundwater sampling by Kleinfelder. <br /> conducted since the Ma <br /> A geologist from Dames&Moore visited the site on October 24, 1990 tocollect <br /> groundwater samples from the three monitoring wells for laboratory analysis. <br /> Ourmethods for the field work conducted are described in the attached"Field procedures". <br /> The depth to groundwater was measured and water from each well was analyze <br /> subjectively. No subjective;evidence of hydrocarbon product was observed. <br /> Approximately six gallons of groundwater was purged from each well before samples were <br /> collected. Purge water from the wells was stored temporarily on-site in a properly <br /> labeled 55-gallon, 17-H steel drum approved for that use by the Department of <br /> Transportation. Disposal of the water is the responsibility of The Customer Company. <br /> The groundwater samples were submitted to BC Laboratories Inc.in Bakersfield, <br /> California. Samples were analyzed for total petroleum hydrocarbons as gasoline(TPH) <br /> and for benzene,toluene,ethylbenzene and total xylene isomers(BTE&X). Hydrocarbon <br /> constituents were not detected by the laboratory analyses. Copies of the laboratory <br /> analysis reports and the Chain of Custody Record are attached. <br /> The groundwater gradient across the site on the date of the sampling event h s The <br /> ea level were <br /> been evaluated. Casing elevations with respect to mean <br /> vntdepth to water measurements to <br /> Customer Company. These elevations were compared <br /> calculate the elevations of the groundwater surface. The data summarized in Table I <br /> was used to evaluate the groundwater gradient,as illustrated on the Potent <br /> 17161.046-o4 <br />