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ATTACHMENT B FIELD AND LABORATORY PROCEDURES Soil Sampling Soil samples were collected by advancing 2-inch-diameter brass sample liners into undisturbed soil, reached through the center of the drill auger Soil samples for chemical analysis were retained in the brass liners, labeled, and capped with Teflon sheets and plastic end caps The samples were then sealed to zip-lock bags, placed on ice, and transported to the laboratory accompanied by the appropriate chain-of-custody documentation Soil Sampling for Stockpiled Soil Soil samples were collected by advancing 2-inch diameter brass sample liners into the soil stockpile, after removing approximately 6 inches to 1 foot of surface material in the sample location One composite sample was collected per approximately 100 cubic yards of soil Soil samples for chemical analysis were retained in the brass liners, labeled, and capped with Teflon sheets and plastic end caps The samples were then sealed in zip-lock bags, placed on ice, and transported to the laboratory accompanied by the appropriate chain-of-custody documentation Laboratory Analysis for Soil Samples Analyses for TPH-g, benzene, toluene, ethylbenzene, xylenes (BTEX compounds), and MtBE were performed by DHS LOFT Method Fuel Oxygenates were analyzed by EPA Method 8260 Analysis for lead was done using EPA method 6010A Groundwater Sampling Procedures The sampling procedure for each well consists first of measuring the water level and checking for the presence of separate-phase hydrocarbons (SPH), using either an electronic indicator and a clear Teflon® bailer or an oil-water interface probe Wells not containing SPH that do not have submerged screens are then sampled without purging Wells that have submerged screens are purged of approximately three casing volumes of water (or to dryness) using a centrifugal pump, gas displacement pump, or bailer Equipment and purging method used for 7G888-010-03/well install doc B- 1 March 16, 1999