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City of Stockton A6810ZOIB <br /> July 18, 1997 <br /> Page 6 <br /> P>reparatioa and �alyt>:cal Methods <br /> Thm of Aulpfis ftw arauam Method Analytical Method Method Detoce m U=k <br /> LWattr Sample Analyses <br /> Benzene,Toluene, 50301 6029 0S#g/L <br /> Ethylbenzene,and Xylenes <br /> L (BTEX) <br /> Total Petroleum 35101 GC/FIDS 50µg/L <br /> Hydrocarbons-Diesel Range <br /> Constitaeuts(TPH-D) <br /> Methyl Tertiary Butyl Ether 5030 602 5 jig/L <br /> (MTBE) <br /> LSoil Sample Analyses <br /> Benzene,Toluene, 5030 80201 0.005 mg/kg <br /> Ethylbenzene,and Xylenes <br /> (BTE <br /> Total Petroleum 5030 GC/FID 10 mg/kg <br /> Hydrocarbons-Diesel Range and <br /> 1 Constituents(i'PH-D) 1311 <br /> Methyl Terti"Butyl Ether 5030 8020 0.05 mg/kg <br /> GC/M Gas Chromatography/Mme Ionization Detection <br /> mg/kg milligrams per kilogram <br /> N8/L micrograms per liter <br /> 1 United States Environmental Protection Agency(U.S.EPA),1986 <br /> 2 U.S.EPA, 1982 <br /> 3 California State Water Resources Control Board,1988 <br /> L ! <br /> Twining is a California Department of Health Services certified hazardous waste laboratory <br /> (Certificate No. 1371) for the analyses outlined herein. A description of laboratory quality <br /> L assurance/quality control procedures used for the analyses are described in the SOPS. <br /> 5.0 RESULTS AND FINDMS <br /> Results of the field investigation and laboratory testing are summarized in the following <br /> subsections. <br /> 5.1 Soil Profl�g: The soil profile beneath the site consisted of strata of: poorly graded, <br /> L medium to coarse grain sand with silt and clay, slightlyplastic cls • and medium to fine <br /> P Y, <br /> t .00, grain poorly graded sand to a depth of 48 feet BSG, the greatest depth explored. <br /> L <br /> L <br />