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5 <br /> ' 5.2 Drilling and Sampling of Soil Borings <br /> FREY personnel oversaw the drilling of soil borings BI through B4 on May 20,2004 in the locations <br /> ' illustrated on Figure 2. Soil boring B1 was drilled in the approximate location as previously <br /> collected soil sample D8-2. Soil borings B2, B3 and B4 were drilled approximately 20 feet to the <br /> ' north/northeast, southeast and west of boring B 1, respectively. <br /> FREY manually excavated each borehole to 5-feet bgs to locate and avoid subsurface obstructions. <br /> ' Soil borings B1 through B4 were advanced to final depths of 40 feet bgs with a CME 75 limited <br /> access drill rigusing 8-inch diameter hollow stem augers.Soil samples were collected at 5-foot depth <br /> intervals between 5 and 40 feet bgs in borings B 1 through B4.A soil sample could not be collected <br /> ' at 5 feet bgs in boring B1 due to the presence of concrete and base rock. Groundwater was not <br /> encountered in soil borings B1 through B4. <br /> ' Soil samples collected as part of this investigation did not contain visual evidence or exhibit <br /> petroleum hydrocarbon odors. In general,subsurface soils encountered during the drilling ofborings <br /> BI through B4 consisted predominantly of silts and clays from below the concrete surface to the <br /> ' bottom of each boring at approximately 40 feet bgs. Soil borings B1 through B4 were backfilled <br /> with neat cement and resurfaced with concrete. Field procedures used in the advancement ofborings <br /> and collection of soil samples are presented in Appendix B. <br /> Soil lithologies encountered at the Site during drilling operations, and explanations regarding the <br /> format,terms, and soil classification system used to describe the soil conditions are depicted on the <br /> ' boring logs included in Appendix C. <br /> 5.3 Laboratory Analyses and Results <br /> Soil samples collected from borings Bl through B4 were analyzed for TPH-g and TPH-d in general <br /> accordance with EPA Method No. 8015M and for BTEX and fuel oxygenates in general accordance <br /> with EPA Method No. 8260B. <br /> ' Concentrations of TPH-d, TPH-g, BTEX and fuel oxygenates were not detected in any of the soil <br /> samples collected and analyzed as part of this investigation. Soil sample analytical results have been <br /> summarized in Table 2. <br /> ' Laboratory analytical and quality control/assurance reports have been attached in Appendix D. Soil <br /> samples were analyzed on Site by Baseline On-Site Analysis, a certified hazardous waste testing <br /> ' laboratory based in Huntington Beach, California. <br /> 1 <br /> ' FREY <br /> 1 <br />