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Mr Donald Kirk Page 6 ' September 22, 1997 . Forklift Area Borings ' ERM collected soil samples from three Geoprobe boreholes at each of the two areas around the Forklift Shop identified in the Phase I ESA as warranting ' further investigation according to the ERM Phase I report These areas, shown on Figure 2, are the lube and waste oil storage area on the south side of the forklift shop, and diesel and solvent ASTs and oil/water separator sump on ' north side of the shop Soil borings drilled on the south side of the shop were identified as FS, and those drilled on the north side were identified as FN Drilling logs for these borings are included in Attachment B IERM collected soil samples from Just above the depth of first encountered ground water in each well, which varied from approximately 7 5 to 8 5 feet bgs ' At the time of collection, ERM field screened each sample for relative concentrations of organic vapors using a PID The only PID readings above background in this area (0 3 to 0 6 ppm) were from boring FN2, where a PID ' reading of 46 ppm was noted at the top of the open borehole after 4 feet of core was removed Soils from a depth of 4 feet bgs showed a PID reading of 2 5 ppm ' No hydrocarbon odors or PID readings above background were noticed in any of the other forklift boreholes ' ERM submitted a total of six soil samples from the forklift areas to the laboratory, where they were analyzed for TPH-full range (including gasoline, diesel and motor oil ranges) by EPA Method 8015, and volatile organic ' compounds (VOCs) by EPA Method 8260 Hydrocarbon detections in soil are summarized in Table 1 (Attachment A) Laboratory reports and chain of custody documentation for soil and ground water samples are presented as Attachment C TPH soil results for Forklift Shop area samples show unknown hydrocarbons in the diesel and/or motor oil range from 1,100 to 16,000 ug/kg (ppb) in all samples except sample FN2-7 5 No hydrocarbons in the gasoline range were detected in these soil samples No VOCs were detected above laboratory i reporting limits in any of the samples s Comparison of Soil Results to PRGs Table 1 also presents a comparison of soil sample results to industrial soil EPrelirninary Remediation Goals (PRGs) for BTEX and other VOCs established by the United States Environmental Protection Agency, Region IX (EPA Region IX, August 1, 1996) PRGs are a valuable tool in evaluating industrial sites, in particular, because they combine "current EPA toxicity values with standard exposure factors to estimate contaminant concentrations in environmental media I (soil and water at this site) that are protective of humans, including sensitive groups, over a lifetime " As such, PRGs can be used to screen pollutants in environmental media, trigger further investigation, and provide initial cleanup I