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1 • • <br /> IL'rCrI%8RNC <br /> and 5 Analytical results of <br /> yt sample reported 1,500 parts milligrams, per kilogram (mg/kg) <br /> I total petroleum hydrocarbons as dieselH D <br /> �„ ) �1, 0 mg/kg TPH as Jet fuel, sample) <br /> revealed 3,500 mg/kg TPH-D and 5,100 mg/kg TPH as jet fuel No other TPH or BTEX <br /> were reported No records related to the former UST piping are available, but due to the <br /> close proximity of the dispensers to the former USTs, the amount of piping was most likely <br /> minimal and hence no sampling was conducted As soil adjacent to the USTs was impacted <br /> with petroleum hydrocarbons, a Unauthorized Release Form (No 90-U11) was completed and <br /> submitted to the SJPHS on January 31, 1990 Proposition 65 notification (No 90-022) was <br /> also submitted at this time Table 1 summarizes the analytical results as presented by <br /> previous consultants for all of the soil samples collected during the UST removal and <br /> 1 subsequent investigations <br /> 2.2 Delta Em ironmental investigation <br /> 1 On October 24, 1990 Delta Environmental amental collected three soil samples (HB-1, HB-2, <br /> and HB-3) from the UST excavation by advancing a hand auger to a depth of 5 5 feet below <br /> the concrete slab along its northern edge, see Figure 3 Analytical results identified no <br /> Ldetectable concentrations of fuel constituents from samples HB-1 and HB-2 Analytical <br /> results for sample HB-3 identified l I mg/kg TPH-D, 14 mg/kg TPH as jet fuel and no <br /> detectable concentrations of benzene, toluene, ethylbenzene, or total xylenes (BTEX) A <br /> complete list of the analytical results are presented in Table 1 <br /> 2.3 Golden West Environmental hwestigation <br /> In April, 1992, Golden West Environmental supervised the drilling and sampling of <br /> three soil borings (P1, P2, and P3) at the site The location of the borings are shown on <br /> Figure 3 Borings P1 and P3 were dulled to depths of 25 and 40 feet bgs, respectively <br /> Bonng P2, an angled bonng was dnlled to a measured depth of 40 feet A total of 21 soil <br /> samples were collected and analyzed from the three borings Analytical results identified <br /> trace concentrations of fuel constituents in soil samples from borne P1 an P3 Elevated <br /> concentrations of TPH-D, TPH as gasoline (TPH G), TPH as jet fuel and BTEX were <br /> 5 <br />