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i <br /> 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 with an impact (slide hammer) sampler. Soil samples for chemical <br /> analysis were retained in the brass liners, labeled, and capped with Teflon sheets and <br /> plastic end caps. The samples were then 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 /> • Analyses for methanol was performed using EPA Method 8015 (modified). TPHg and <br /> BTEX analysis was performed using the DHS/LUFT method. Analysis for fuel <br /> oxygenates including MtBE were performed by EPA Method 8260A. <br />