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5.0 LABORATORY ANALYTICAL TESTING <br /> All soil and groundwater samples obtained during the field exploration were delivered under <br /> chain-of-custody documentation to Del Mar Analytical Laboratory, located in Calton, <br /> California. The laboratory is certified by the State of California Department of Health <br /> ] Services Environmental Laboratory Accreditation Program to perform the testing reported <br /> herein. Collected soil samples were analyzed for total petroleum hydrocarbons (TPH), and <br /> volatile organic hydrocarbons benzene,toluene,ethylbenzene,and xylene(BTEX)using EPA <br /> ] Test Methods 8015 (modified for gasoline), and 8020 respectively. A composite soil sample, <br /> one from each soil boring, was mixed in the laboratory and analyzed. All retained soil <br /> ` samples from each boring were used for the composite soil sample. All groundwater samples <br /> were evaluated for the presence of TPH and BTEX and selected samples (MW-2 and <br /> MW-3)were evaluated for volatile organic compounds/chlorinated solvents by EPA Method <br /> 8260. Additionally, all soil and groundwater samples were analyzed for methyl tertiary butyl <br /> ether (MTBE) by EPA method 8020. <br /> .J <br /> 7 <br /> 7 <br /> J <br /> _ J <br /> J <br /> dec-96\arcateu.eu 5-1 <br />