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LEVINE•FRICKE <br /> Task 1: Further Definition of the Extent of <br /> Petroleum-Affected Soils <br /> To supplement existing soil-quality data obtained by TTI and <br /> Levine-Fricke, approximately 15 exploratory soil borings are <br /> planned (Figure 2) . The exact number and depth of the soil <br /> borings may vary depending on the conditions encountered. The <br /> maximum depth of the soil borings will be approximately 20 <br /> feet. They will be drilled using a hollow stem auger rig <br /> subcontracted by Levine-Fricke. After sampling, the borings <br /> will be backfilled with cement-bentonite grout. Excess <br /> petroleum-affected soils will be stockpiled on polyethylene <br /> sheets, and non-affected soils will be left adjacent to the <br /> borings. <br /> A Levine-Fricke geologist will monitor the soil samples and <br /> cuttings for visible indication of petroleum and for volatile <br /> organic compounds (VOCs) using a field photoionization <br /> detector (PID) . Additionally, the soil lithology, ground <br /> water encountered, and VOC measurements in soils encountered <br /> will be recorded. Soil samples will be collected by using a <br /> modified California sampler. This sampling method consists of <br /> driving a hammer with 2-inch diameter brass tubes into native <br /> soil encountered. The ends of the tubes will be covered with <br /> plastic caps over aluminum foil and sealed with cloth tape and <br /> labeled. The soil samples will be placed in a chilled ice <br /> chest for delivery to the on-site laboratory. <br /> Levine-Fricke will subcontract a mobile analytical laboratory <br /> to analyze the soil samples for total petroleum hydrocarbons <br /> (TPH) using modified EPA Method 8015 and extraction method <br /> 3550 on site. The field work and analyses will be conducted <br /> concurrently. <br /> Permits to conduct the soil sampling will be required from the <br /> San Joaquin County - Public Health Services. Levine•Fricke' s <br /> Health & Safety Plan (HSP) for site work will be implemented. <br /> All workers at the Site will be required to read and sign the <br /> HSP and addendum. <br /> The field and analytical results will be formalized on <br /> exploratory boring logs, tables, and a plan figure .indicating <br /> the horizontal extent of petroleum-affected soils along the <br /> northern boundary of the Site. These results will be used to <br /> estimate the volume of petroleum-affected soil present on the <br /> Site. <br /> Task 2: Laboratory Biotreatability Studies <br /> Treatability studies will be conducted in the Levine-Fricke <br /> laboratory to evaluate the biodegradability of the petroleum <br /> 3 - C, <br />