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April 19, 1988 <br /> Page 4 <br /> 2. Purging Procedure <br /> Prior to groundwater sampling, the well will be checked for floating <br /> product, sheen and odor using a clean, clear acrylic bailer. If there is <br /> no measurable amount of floating product, the well will be sampled. Prior <br /> to sampling, the well will be purged of a minimum four casing volumes (or <br /> until dryness) using a previously cleaned centrifugal pump or a <br /> submersible bladder pump constructed of stainless steel and Teflon <br /> materials. <br /> 3. Sample Collection Procedure <br /> After the purging, the water sample will be collected and placed into the <br /> appropriate EPA-approved containers. <br /> 4. Chain of Custody <br /> The water samples collected will be labeled, logged onto chain-of-custody <br /> documents, and placed on ice for transport to the laboratory. <br /> IV. RESULTS <br /> A. Laboratory Analysis <br /> 1. Laboratory Used <br /> All groundwater and selected soil samples collected will be analyzed by <br /> IT Corporation of Santa Clara, California, a California State-certified <br /> Laboratory. <br /> 2. Analysis <br /> Selected soil samples will be analyzed for low boiling hydrocarbons <br /> (calculated as gasoline), as well as benzene, toluene, and xylenes (BTX <br /> compounds). Groundwater samples will also be analyzed for the presence of <br /> low boiling hydrocarbons and BTX compounds. In addition, the selected <br /> soil sample(s) from the boring/well located west of the former fuel and <br /> waste oil tanks will be analyzed for high boiling hydrocarbons, including <br /> waste oil and fuel oil compounds along with volatile organic compounds. <br /> Groundwater (if appropriate) from the same location will also be analyzed <br /> for these parameters. <br /> 3. Soil and Groundwater Analytical Results <br /> Soil and groundwater (if appropriate) results will be presented in tabular <br /> form. <br />