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r <br /> Mr. Vidal Pedroza low <br /> March 23, 2000 <br /> Page 4 of 6 <br /> feet and 100 ppm at 14.5 feet. No odors were noted at 19.5 feet bgs, and FID readings were zero. <br /> No petroleum odors or soil discoloration was noted in any samples collected from any other boring. <br /> FID readings were zero. Copies of field logs are included in Attachment A. <br /> 4.2 Laboratory Analysis <br /> Soil samples collected beneath the gasoline UST were analyzed for total petroleum hydrocarbons as <br /> gasoline (TPHg) using EPA method 8015 modified, benzene, toluene, ethylbenzene and xylenes <br /> (BTEX) using EPA method 8020, gasoline oxygenate additives using EPA method 8260, and total <br /> lead using EPA method 60101200.7. Soil samples collected beneath the diesel USTs were analyzed <br /> for BTEX using EPA method 8020 and total petroleum hydrocarbons as diesel (TPHd) using EPA <br /> method 8015 modified. Soil samples collected beneath the product dispensers were analyzed for <br /> TPHg, TPHd, BTEX, and total lead using the methods indicated above, as well as methyl-tert-butyl <br /> ether(MTBE)using EPA method 8020. <br /> The groundwater sample was analyzed for dissolved lead (EPA 60101200.7), TPHg, TPHd, BTEX, <br /> and MTBE by the methods listed above. <br /> 4.3 Soil Analytical Results <br /> No petroleum hydrocarbon constituents were detected above the laboratory detection limit in any <br /> soil boring, except for the samples collected from 14.5 feet bgs in borings SB4 and SB5. TPHd was <br /> detected at 8.6 parts per million (ppm) in boring SB5, located at the south end of the center diesel <br /> UST, at a depth of 14.5 feet bgs. TPHg was detected at 1.4 ppm and xylenes were detected at 0.016 <br /> ppm in boring SB4, located at the south end of the gasoline UST, at a depth of 14.5 feet bgs. <br /> Total lead was detected at levels ranging from 5.3 (parts per million) ppm to 14 ppm. Analytical <br /> results are summarized in Table 1. Laboratory reports and chain of custody documentation are <br /> included in Attachment B. <br /> 4.4 Groundwater Analytical Results <br /> The grab groundwater sample collected from boring SBI contained no detectable TPHg, BTEX, <br /> MTBE, or dissolved lead. However, TPHd was detected at a concentration of 110 parts per billion <br /> (ppb). <br /> Analytical results of the groundwater sample is included in Table 1. Laboratory reports and chain <br /> of custody documentation are included in Attachment B. <br /> 5.8 SUMMARY AND CONCLUSIONS <br /> 5.1 Summary <br /> Soil at the site was classified as lean to silty clay in soil samples collected between 3 and 11 <br /> G:1D"GROUNDZE\Waterfront\Sub=f3=.doe 4 <br />