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ATTACHMENT A <br /> FIELD AND LABORATORY PROCEDURES <br /> Soil Sampling <br /> Soil samples were 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 were retained in the brass liners, labeled, and capped with Teflon <br /> sheets and plastic end caps The samples were then sealed in zip-lock bags, placed on ice, <br /> and transported to the laboratory accompanied by the appropriate chain-of-custody <br /> documentation <br /> Soil Sampling for Stockpiled Soil <br /> • Soil samples were collected by advancing 2-inch diameter brass sample liners into the <br /> soil stockpile, after removing approximately 6 inches to 1 foot of surface material in the <br /> sample location One composite sample (four sleeves to 1 sample) was collected Soil <br /> samples for chemical analysis were retained in the brass liners, labeled, and capped with <br /> Teflon sheets and plastic end caps The samples were then sealed in zip-lock bags, placed <br /> on ice, and transported to the laboratory accompanied by the appropriate chain-of-custody <br /> documentation <br /> Laboratory Analysis of Soil <br /> Soil samples were analyzed for total petroleum hydrocarbons calculated as gasoline <br /> (TPHg) and total petroleum hydrocarbons calculated as diesel (TPHd) by EPA Method <br /> 8015, hexavalent chromium by EPA Method 7196, cadmium, chromium, lead, nickel, <br /> and zinc by EPA 6010, volatile organic compounds (VOC's) by EPA Method 8260, <br /> polychlorinated biphenyls by EPA Method 8082, and total recoverable petroleum <br /> hydrocarbons (TRPH) by EPA Method 418 1 <br /> i <br />