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I <br /> 10 May 2004 <br /> AGE-NC Project No 96-0229 <br />' Page 6of8 <br /> I The boring logs are Included in Appendix B Soil data collected from wells MW-13, MW-14 and <br /> MW-16 through MW-19 are depleted on cross sections B-B' and F-F' (Figures 3 and 4, <br /> respectively) <br /> I <br /> 32 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL <br /> IModerate to faint petroleum hydrocarbon odors were noted in soil samples collected from MW-17 <br /> at depths between 45 and 55 feet bsg,however, vapor concentrations were not detected utilizing an <br />' organic vapor meter using a photo-ionization detector(PID Thermo Environmental 580A, 10 0 eV, <br /> calibrated to isobutylene <br />' No hydrocarbon odor or vapor were detected from any other soil samples Hydrocarbon odor <br /> observations and organic vapor field measurments are recorded on the boring logs contained in <br /> Appendix B <br /> I3 3 SOIL SAMPLE ANALYTICAL RESULTS <br /> A total of twenty-six soil samples were submitted to a State of California Department of Health <br /> Services-certified laboratory(Castle Analytical Laboratory)for analysis of petroleum hydrocarbons <br /> and total lead <br /> I TPH-g was detected in two soil samples collected from MW-13 at 85 and from MW-17 at 45 feet <br /> bsg at concentrations of 7 1 mg/kg and 3 2 mg/kg, respectively <br /> Various BTEX compounds were detected in soil samples collected from MW-13 at depths between - <br /> 75 and 105 feet bsg and from MW-17 at 45 and 50 feet bsg at concentrations as high as 0 59 mg/kg <br /> xylenes in sample MW 13-85, low concentrations of xylenes were detected from MW-14 at 80 feet <br /> at a concentration of 0 0057 mg/kg <br /> MTBE was detected in a soil sample collected from MW-17 at 45 feet bsg at 0 038 mg/kg No other <br /> fuel components were detected from the laboratory analysis Analytical results of soil samples are <br /> summarized in Table 2 The laboratory reports (Castle Analytical Laboratory reference nos 5946, <br /> 5947, 6241, 6242, 6258, 6259) and chain-of-custody forms are included in Appendix E <br /> IThe estimated extent ofp etroleum hydrocarbon-impacted soil is depicted in cross-sectional views <br /> B-B'and F-F' in Figures 19 and 20, respectively <br /> IAdvanced GeoEnvironmental,Inc <br /> I <br />