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Ms. Margaret Lagorio <br /> San Joaquin County <br /> July 24, 1995 <br /> Page 3 <br /> This level of investigation is for estimates of volume of potential chemical impact only <br /> and may not be sufficient to request closure of the UST location. <br /> Paint Shop Compressor Area <br /> A compressor, resting on heavily oil-stained asphalt, is located immediately adjacent <br /> to the paint shop discharge area. A utility trench covered with broken asphalt is next <br /> to the compressor. <br /> Soil samples will be collected using the Geoprobe system from one location next to <br /> the utility trench and one location near the compressor. One additional soil sample will <br /> be collected by hand from utility trench backfill. Soil samples will be analyzed for TPH <br /> with characterization of peaks and PCBs. <br /> Paint Shop Discharge Area <br /> Liquid waste from a scrubber-type ventilation system has discharged to the ground <br /> surface behind the paint shop. Water-based paints are currently used at the site and <br /> oil-based paints have been used in the past. A variety of solvents have been used at <br /> this location, including paint thinners and mineral spirits. <br /> Soil gas samples will be collected in two locations along the fence line in the drainage <br /> from the paint shop discharge and will be field screened using a PID. Soil samples will <br /> also be collected using a Geoprobe system from adjacent locations. All soil samples <br /> from this location will be analyzed for 17-Title 22 metals and VOCs. <br /> Roadway Express Fuel Island/Sand Pile <br /> Roadway Express operates a fuel dispenser island immediately west of the project site. <br /> SJCEHD records indicate that a spill has taken place at that location. In addition, <br /> several 55-gallon drums of oils without secondary containment are stored along the <br /> fence separating the two properties. <br /> To evaluate potential impact to groundwater from the nearby spill, a soil gas sample <br /> will be collected from one location near the fence line and will be field screened using <br /> a PID. To evaluate potential impacts due to potential leaks from the fuel dispenser, <br /> one soil boring will be advanced to groundwater (estimated to be approximately 70 <br /> feet deep), and one groundwater sample collected using the Hydropunch technique. <br /> The groundwater sample will be analyzed for TPH with characterization of peaks and <br /> VOCs. <br /> To evaluate potential impact to shallow soils from surface storage and use of <br /> petroleum products, soil samples will be collected using the Geoprobe system from <br /> WIN HYDRD-SEARCH, inG A Tetra Tech Company <br />