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ATTACHMENT C <br /> FIELD AND LABORATORY PROCEDURES FOR SOIL SAMPLING <br /> Soil Sampling <br /> Soil samples were collected by advancing 2-inch-diameter brass sample liners into undisturbed soil, or <br /> soil removed from an excavation by a backhoe bucket. Soil samples for chemical analysis were retained <br /> in the brass liners, labeled, and capped with Teflon sheets and plastic end caps. The samples were then <br /> sealed in zip-lock bags, placed on ice, and transported to the laboratory accompanied by the appropriate <br /> chain-of-custody documentation. <br /> Soil Sampling from Stockpiled Soil <br /> Soil samples were collected by advancing 2-inch diameter brass sample liners into the soil stockpile, after <br /> removing approximately 3 inches of surface material in the sample location. One composite sample (four <br /> sleeves to 1 sample) was collected per approximately 100 cubic yards of soil. Soil samples for chemical <br /> analysis were retained in the brass liners, labeled, and capped with Teflon sheets and plastic end caps. <br /> The samples were then sealed in zip-lock bags, placed on ice, and transported to the laboratory <br /> accompanied by the appropriate chain-of-custody documentation. <br /> Laboratory Analysis of Soil Samples <br /> UST, piping, dispenser, and stockpile samples were analyzed for gasoline range organics (GRO); <br /> benzene, toluene, ethylbenzene, and total xylenes (BTEX); and oxygenates/additives including MtBE by <br /> EPA Method 8260B. All soil samples were also analyzed for total lead by EPA Method 6010B. <br />