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' 19 March 2001 <br /> AGE-NC Project No 98-0492 <br /> Page 5 of 7 <br /> ' 314 Logging <br /> During drilling, sample duplicates were monitored for the presence of organic vapor using an organic <br /> ' vapor meter equipped with a photo-tomzation detector(PID Thermo Environmental 580A, 10 0 eV, <br /> calibrated to isobutylene) and were visually described on bonng logs in accordance with the Unified <br /> Soil Classification System (USCS) Boring logs are Included as Appendix A <br /> ' 4.0. FINDINGS <br /> ' 41 SOIL PROFILE <br /> Generally, brown to tan, dry to moist, poorly graded sand was encountered from surface grade to <br /> ' approximately 15 feet bsg Brown to tan, moist to saturated, silty sand was encountered at 20 feet <br /> bsg in borings P-7 and P-9 and at 25 feet bsg in P-7, P-8 and P-10 Poorly graded sand was <br /> encountered at 25 feet bsg in bonngs P-9 and P-11 Brown, damp to moist, silty clay to clayey silt <br /> ' was encountered at 20 feet bsg in borings P-8, P-10 and P-11 Bonng logs are included in Appendix <br /> A <br /> ' Hydrocarbon odor was not observed in any of the soil and ground water samples collected Organic <br /> vapor was not detected by the PID in any of the soil samples collected from P-7 through P-11 <br /> ' Organic vapor field measurements are included on the boring logs contained in Appendix A <br /> ' 42 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> TPH-g, TPH-d, BTE&X and fuel oxygenates were not detected above laboratory reporting limits <br /> in any of the soil samples analyzed Analytical results of soil samples are summarized in Table 2 <br /> The laboratory report (MAI Lab I D 58764 through 58772 and 58778) and chain-of-custody are <br /> included in Appendix B <br /> 43 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> ' TPH-g was detected in the ground water sample collected from P-9 at a concentration of 120 <br /> micrograms per liter(ug/1) TPH-d was detected in the ground water samples collected from P-7, P-9 <br /> and P-10 at concentrations of 240 4g11, 170 fcg/l and 140,ug/l, respectively <br /> BTEX compounds were detected in the ground water sample collected from P-9 at concentrations <br /> of 3 2 kzg/l,9 9 mg/l, 1 0µg11 and 7 7 yg/1, respectively Dissolved MTBE was detected in the ground <br /> water sample from P-9 at a concentration of 480,ugn utilizing EPA Method 8020 and confirmed at <br /> ' a concentration of 440 µg/1 utilizing EPA Method 8260 <br /> Advanced GcoEnvironmental,Inc <br />