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n <br /> KEI-P88-0810 <br /> -„September 15, 1988 <br /> Page 3 <br /> 5. samples will be collected with a California modified <br /> split-spoon---sampler with 2”- -by 4" brass liners: _- . The <br /> samples wi-I-I be advanced ahead of the drilling augers <br /> _-- <br /> at- designated depths by dropping a 140 pound hammer 30 <br /> inches. -Blow counts will be . recorded. The samples <br /> will be removed from the sampler, retained in the. brass <br /> liners, and will be sealed with aluminum foil, plastic <br /> caps and tape, and will be- labeled and stored on ice <br /> for delivery to a state certified laboratory. <br /> 6. Finalized- boring logs will be prepared from field logs <br /> and will. be submitted to_ . the San Joaquin County <br /> Department of Health and the to Regional water Quality <br /> Control Board (RWQCB) . <br /> 7. After groundwater -has been intercepted, drilling will <br /> be-terminated. One water sample will be collected. from , <br /> each. boring with a clean Teflon bailer. The samples <br /> } - - will be decanted into ciean .VOA vials .with Teflon-lined <br /> screw caps . and will be labeled and stored on ice for <br /> delivery to' a state certified laboratory for analyses. <br /> 8. After sampling is complete, the boreholes will be <br /> backfilled to the surface with a cement-sand slurry. <br /> ' IV. RESULTS <br /> Laboratory Analyses-: <br /> 1. Either Sequoia Analytical -Laboratory of. Redwood City or <br /> Mobile Chem-Labs of San Carlos,. -both state certified, <br /> will be used. <br /> 2. Soil and ,water samples will be analyzed for .total <br /> petroleum hydrocarbon--.(TPH) as gasoline and as diesel, <br /> benzene toluene xylene and' eth lbenzene <br /> , � Y - y (BTX,,) using. <br /> EPA methods 5:030, 501-0, 801.5, 8020 or 602 . <br /> 3 . Analytical -results will be presented in tabular form, <br /> showing sample location and depth, analytical results <br /> and detection limits. <br /> B. Interpretation ofResults: <br /> The analytical results will be used .to -generally delineate <br /> the vertical and- lateral extent of any possible contaminants <br /> in the soil and groundwater. A cross sectional profile-will <br /> be constructed showing the subsurface soils, groundwater <br /> depth and known extent of contaminants. <br /> _ f <br />