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3 <br /> 3 Not' - <br /> a.fy the San Joaquin County Environmental Health Division <br /> (SJEHD) 48 hours prior to work initiation. <br /> 4) Drill three soil borings using truck-mounted continuous- <br /> flight, 8-inch hollow-stem augers in the vicinity of the pump <br /> island in a pattern designed to surround the leak point. <br /> 5) Obtain discrete soil samples at five-foot intervals from 10 to <br /> 40 feet using a split-tube sampler loaded with three brass <br /> tubes. <br /> 6) Decontaminate sampling equipment in a tri-sodium phosphate <br /> solution and rinse twice with water prior to each sampling <br /> run. <br /> 7) Preserve the soil samples in the lead brass tube, seal with <br /> aluminum foil, cap, and store on ice pending analysis by an <br /> on-site state-certified mobile laboratory. <br /> 8) Label and log soil samples on a chain of custody form. <br /> 9) Based on field PID measurements, select specific soil samples <br /> for analysis of total recoverable petroleum hydrocarbons <br /> (TRPH) in accordance with EPA method 8015 and for purgeable <br /> aromatic hydrocarbons (BTE&X) in accordance with EPA method <br /> 8020. <br /> 10) Monitor auger returns and soil sample duplicates for presence <br /> of volatile organics using a photo-ionization detector. <br /> 11) Log auger returns in accordance with the Unified Soil <br /> Classification System. <br /> L12) Convert Boring 1 (Figure 2) to a vapor extraction well in <br /> accordance with the well design depicted in Figure 3 . <br /> 13) Using a tremmie pipe, backfill other borings with cement from <br /> total depth to surface. <br /> 14) Prepare a Preliminary Investigation and Evaluation (PIER) <br /> Report by a Registered California Geologist for submittal to <br /> San Joaquin County EHD. <br /> L <br />