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r <br /> r <br /> ATTACHMENT A <br /> FIELD AND LABORATORY PROCEDURES <br /> r <br /> Soil Sampling <br /> Soil samples were collected by advancing 2-inch-diameter brass sample liners into undisturbed <br /> soil, or soil removed from an excavation by a backhoe bucket. Soil samples for chemical <br /> analysis were retained in the brass liners, labeled, and capped with Teflon sheets and plastic end <br /> caps. The samples were then sealed in zip-lock bags, placed on ice, and transported to the <br /> laboratory accompanied by the appropriate 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 <br /> r stockpile, after removing approximately 6 inches to 1 foot of surface material in the sample <br /> location. One composite sample (four sleeves to 1 sample) was collected per approximately 100 <br /> cubic yards of soil. Soil samples for chemical analysis were retained in the brass liners, labeled, <br /> r and capped with Teflon sheets and plastic end caps. The samples were then sealed in zip-lock <br /> bags, placed on ice, and transported to the laboratory accompanied by the appropriate chain-of- <br /> custody documentation. <br /> r <br /> Laboratory Analysis of Soil Samples <br /> UST samples were analyzed for TPHg, benzene, toluene, ethylbenzene, xylenes (BTEX <br /> compounds), and MtBE by EPA Method 8015/8020, and fuel oxygenates by EPA Method <br /> 8260B. Stockpiled soil samples were analyzed for TPHg, BTEX, and MtBE by EPA Methods <br /> L 8015/8020,and total lead by EPA Method 6010B. <br /> L <br /> V <br /> L <br /> r. <br />