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1 <br />' I 1 November 1999 <br /> AGE-NC Project No 97-0230 <br />' Page 5 of 7 <br />' 42 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL <br /> Faint to intense hydrocarbon odor was noted in duplicate soil samples collected from P-3 at depths <br /> between 5 feet bsg and 15 feet bsg and boring P-4 at 15 feet bsg Petroleum hydrocarbon odor is <br /> noted on boring logs contained in Appendix A <br />' Organic vapor was detected in soil sample duplicates from P-1, P-3 and P-4, using a PID, at <br /> concentrations as high as 844 parts per million (ppm) Organic vapor field measurements are <br /> summarized on the boring logs contained in Appendix A <br /> 43 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> A total of eighteen soil samples were submitted to a DHS-certified laboratory (Castle Analytical <br /> Laboratory and McCampbell Analytical Inc ) for analysis as noted above TPH-g was detected in <br /> soil samples collected from probe bonngs P-1, P-3 and P-4 at concentrations ranging as high as 60 <br /> mg/kg TPH-d was detected in soil samples collected from P-1, P-3 and P-4 at concentrations <br />� . ranging as high as 110 mg/kg <br /> BTEX compounds were detected in soil samples collected from P-3 and P-4 at concentrations <br /> ranging as high as 4 4 mg/kg, MTBE was detected in soil samples collected from P-1 P-3, P-4 and <br /> P-5 at concentrations ranging as high as 39 mg/kg <br /> MTBE was confirmed from borings P-1, P-3, P-4 and P-5 utilizing EPA Method 8260 at <br /> concentrations ranging as high as 32 mg/kg No other fuel oxygenated compounds were detected <br /> I during the laboratory analysis of selected soil samples Analytical results of soil samples are <br /> summarized in Table 2 The laboratory reports ( Castle Analytical Laboratory Reference No 2464 <br /> and McCampbell Analytical Inc Lab ID 18497 through 18512) and chain-of-custody forms are <br /> included in Appendix B <br /> The estimated extent of petroleum hydrocarbon-impacted soil is depicted in cross sectional views <br />' A -A 'and B- B'in Figures 5 and 6, respectively The estimated extent of petroleum hydrocarbon- <br /> impacted soil is depicted in plan view in Figure 7 <br /> 5.0. SUMMARY AND CONCLUSIONS <br /> O S <br /> The following Is a summary based on the findings of this preliminary investigation <br /> • Regional ground water elevation reaps published by the SJCFCD give an Inferredrevailin <br /> p g <br /> Adtianced GeoEnNironmental,Inc <br />