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�. Organic Vapor Procedures <br /> Soil samples collected at 5-foot depth intervals during drilling will be analyzed in the field for <br /> ionizable organic compounds using a flame-ionization detector (FID) or a photo-ionization <br /> detector (PID) with a 10 2 eV lamp The test procedure will involve measuring approximately <br /> 30 grams from an undisturbed soil sample, placing this subsample in a ZiplockTM_type bag or in a <br /> clean glass far, and sealing the jar with aluminum foil secured under a nng-type threaded lid <br /> The container will be warmed for approximately 20 minutes (in the sun), then the head-space <br /> within the container will be tested for total organic vapor, measured in parts per million as <br /> benzene (ppm, volume/volume) The instrument will be calibrated pnor to drilling The results <br /> of the field testing will be noted on the boring logs FID/PID readings are useful for indicating <br /> relative levels of contamination, but cannot be used to evaluate hydrocarbon levels with the <br /> confidence of laboratory analyses <br /> Laboratory Procedures <br /> Selected soil samples will be analyzed for the presence of total petroleum hydrocarbons <br /> calculated as gasoline (TPH-g), benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl <br /> tertiary-butyl ether (MtBE) using EPA Methods 8015 Modified and 8020, with MtBE <br /> confirmation of the highest detected MtBE concentration from each bonng using <br /> EPA Method 8260 Groundwater samples will be analyzed for the presence of TPH-g, BTEX, <br /> and for five oxygenates, 1,2-DCA, and EDB using EPA Methods 8015 Modified, 8020 and 8260, <br /> respectively <br /> Soil Cuttings and Purge Water <br /> Soil cuttings generated during drilling operations will be temporarily stored on site and covered <br /> with plastic sheeting pending characterization and disposal A California-certified disposal <br /> contractor will remove soil cuttings to an appropriate disposal facility Water generated during <br /> steam cleaning, development, and sampling of wells will be temporarily stored in DOT-approved <br /> 55-gallon drums pending transport by the disposal contractor to an appropriate disposal or <br /> treatment facility <br /> ►r copoAw"n <br /> SAC 1N IsacDP120411PRJ1PJ81828800 1 a doc-Mit 1 Rev 0,07/06/01 <br /> (01000000) C_2 <br />