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11 November 1999 <br /> • AGE-NC Project No 97-0230 <br /> Page 4of7 <br /> amyl methyl ether(TAME), and MTBE by EPA Method 8260 Modified <br /> 3 12 Equipment Decontamination <br /> Prior to sample collection, Geoprobe soil sampling equipment was thoroughly rinsed with clean <br /> water after washing with a solution of Alconox Geoprobe rods were thoroughly cleaned prior to soil <br /> probe boring advancement <br /> 313 Logging <br /> During drilling activities, soil sample duplicates were monitored for the presence of organic vapor <br /> using an organic vapor meter equipped with a photo-ionization detector (PID Thermo <br /> Environmental 580A, 10 0 eV, calibrated to isobutylene) and were visually described on boring logs <br /> in accordance with the Unified Soil Classification System (USCS) Boring logs are included as <br /> Appendix A General lithology beneath the site is depicted in cross sectional view on Figures 3 and <br /> 4 <br /> 4.0 FINDINGS <br /> Soil descriptions were utilized to construct the cross sections presented in Figures 3 and 4 <br /> Laboratory analysis of eighteen soil samples detected total petroleum hydrocarbons in five soil <br /> samples, BTEX compounds were detected in four soil samples, MTBE was detected in nine soil <br /> samples <br /> 41 SOIL PROFILE <br /> Generally, brown/gray, damp to moist, fine sandy silt was encountered from 5 feet bsg to depths of <br /> approximately 10 feet bsg Between 10 feet bsg and approximately 25 feet bsg, a brown/gray, damp <br /> to moist, silty fine sand was encountered A brown/gray, damp to moist, fine sandy silt was <br /> encountered from approximately 25 feet bsg to depths of approximately 35 feet bsg At depths in <br /> excess of 35 feet bsg, a brown, damp to moist, silty fine sand was encountered <br /> Saturated soil was not encountered from borings P-I through P-6 to depths of 35 feet bsg Boring <br /> . logs are included in Appendix A, general lithology beneath the site in cross sectional view is <br /> depicted on Figures 3 and 4 <br /> Advanced GeoEn%iron menial,Inc <br />