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� I <br /> through the augers and pouring the water into sterilized 40-m1 glass vials. The samples will be <br /> examined for visual and olfactory evidence of gasoline contamination and tested with an organic <br /> vapor meter, and observations will be recorded on the boring log. The samples will then be placed <br /> in a cooled ice chest and the boring will be backfilled to the surface with a cement slurry. <br /> If soil or groundwater contamination is evident in this field screening, three (3) additional borings <br /> will be drilled in a triangular pattern around the UST cavity(Figure 2). Samples from these borings <br /> will be similarly examined and preserved, and the borings will then be backfilled with cement <br /> grout. The augers will be pressure-washed between borings to minimize the potential for cross- <br /> contamination. Cuttings will be placed on plastic sheeting pending laboratory analysis of the <br /> samples. <br /> All samples will be transported to Excelchem Analytical Laboratories and analyzed for TPH-g, <br /> BTEX, and MTBE. After the laboratory results have been received, Upgradient will prepare an <br /> assessment report describing the investigation and providing recommendations for any further work <br /> that might be needed. II <br /> The field and laboratory procedures are summarized below. <br /> 4.0 PROCEDURES <br /> 1)Notify San Joaquin County EHD at least 48 hours prior to field work. <br /> 2) Drill boring B-1 (Figure 2)to groundwater using gasoline-powered hollow-stem augering <br /> equipment. <br /> 3)Collect discrete soil samples at 5-foot intervals in 3/4"diameter by 2-foot-long clear plastic <br /> sample sleeves. <br /> 4) Screen the sleeves for the presence of organic vapors using a portable photo-ionization <br /> detector(PID) and record the measurement on the boring log. <br /> 5)Record the sample descriptions on the boring log in accordance with the Unified Soil ij <br /> Classification System. <br /> 6)Preserve the sleeves by covering the ends with plastic caps and placing in a cooled ice chest. <br /> 7)Decontaminate the sampling equipment between samples. <br /> �i <br /> 8) Collect a groundwater sample in a clear plastic bailer and pour into sterilized EPA-approved <br /> f 40-m1 vials. <br /> I ' <br /> 9)Place auger returns on plastic sheeting. <br /> 4 <br /> s <br /> i <br />