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ATTACHMENT B <br /> FIELD AND LABORATORY PROCEDURES <br /> field testing will be noted on the boring logs The test procedure will involve measuring <br /> approximately 30 grams from an undisturbed soil sample, placing this subsample in a sealed <br /> container (either a zip-lock bag or a mason far) The container will be warmed for <br /> approximately 20 minutes (in the sun), then the head-space within will be tested for total <br /> organic vapor, measured in parts per million as benzene (ppm, volume/volume) PID and <br /> FID readings are useful for indicating relative levels of contamination, but cannot be used to <br /> evaluate hydrocarbon levels with the confidence of laboratory analyses <br /> Soil Sampling for Stockpiled Soil <br /> Soil samples will be collected by advancing a 2-inch diameter brass sample liner into the soil <br /> stockpile, after removing approximately 6-inches to 1-foot of surface material in the sample <br /> location One composite sample will be collected per approximately 100 cubic yards of <br /> stockpiled soil Soil samples for chemical analysis will be retained in the brass liners, <br /> labeled, and capped with Teflon sheets and plastic end caps The samples will then be sealed <br /> in zip-lock bags, placed on ice, and transported to the laboratory accompanied by the <br /> appropriate chain-of-custody documentation <br /> Laboratory Procedures for Soil and Groundwater Samples <br /> Selected soil and groundwater samples will be analyzed for the presence of TPHg using EPA <br /> . Method 8015 modified, and benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl <br /> tertiary butyl ether (MtBE) by EPA Method 8260 <br /> Soil Cuttings and Rinsate Water <br /> Soil cuttings generated during drilling operations will be temporarily stored onsite and <br /> covered with plastic sheeting pending characterization and disposal Soil cuttings will be <br /> removed by Chevron's disposal contractor to an appropriate disposal facility Water <br /> generated during steam cleaning will be temporarily stored in DOT-approved 55-gallon <br /> drums pending transport by Chevron's disposal contractor to an appropriate disposal or <br /> treatment facility Soil cuttings and ansate water drums will be temporarily stored onsite for <br /> approximately 4 to S weeks <br />