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11/11/98 WED 08:47 FAX 916 964 1889 SECOR-SACRAMEN7U -• <br /> ATTACHMENT A <br /> FIELD AND LABORATORY PROCEDURES <br /> Soil Sampling <br /> Soil samples will be collected by advancing 2-inch-diameter brass sample liners into <br /> undisturbed soil, or soil removed from an excavation by a backhoe bucket. Soil samples <br /> for chemical analysis will be retained in the brass liners, labeled, and capped with Teflon <br /> sheets and plastic end caps. The samples will then be sealed in zip-lock bags, placed on <br /> ice, and transported to the laboratory accompanied by the appropriate chain-of-custody <br /> documentation. <br /> Soil Sampling for Stockpiled Soil <br /> Soil samples will be collected by advancing 2-inch diameter brass sample liners <br /> approximately six inches to one foot into the soil stockpile. One composite sample (4-1) <br /> will be collected per approximately 100 cubic yards of soil. Soil samples for chemical <br /> analysis will be retained in the brass liners, labeled, and capped with Teflon sheets and <br /> plastic end caps. The samples will then be sealed in zip-lock bags, placed on ice, and <br /> transported to the laboratory accompanied by the appropriate chain-of-custody <br /> documentation. <br /> Laboratory Analysis of Soil Samples <br /> Analysis for total petroleum hydrocarbons calculated as gasoline (TPH-g) will be <br /> performed by modified EPA method 8015. Analysis for benzene, toluene, ethylbenzene, <br /> and xylenes (BTEX compounds), and methyl tertiary-butyl ether (MtBE) will be <br /> performed by EPA Method 8020. Fuel oxygenates will be analyzed by EPA Method <br /> 8260. These analytical methods utilize gas chromatography and flame-ionization <br /> detection, photo-ionization detection or mass spectrometry. <br />