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26 September 1997 <br /> AGE-NC Project No 97-0330 <br />' Page 4 of 7 <br />' 3 5 EQUIPMENT DECONTAMINATION <br /> The hollow stem augers were steam cleaned prior to advancing each boring Sampling tools and brass <br /> I sleeves used for sample collection were thoroughly washed with a solution of Alconox and were <br /> rinsed twice with clean water prior to each sampling run <br /> 3 6 BORING LOGS <br /> During drilling activities, sample duplicates were described on boring logs using the Unified Soil <br /> Classification System (USCS), and were monitored for the presence of organic vapor using an <br /> organic vapor meter equipped with a photo-ionization detector (PID Thermo Environmental 580A, <br /> 10 0 eV, calibrated to isobutylene) Boring logs are summarized in Appendix A <br /> 4.0. FINDINGS <br /> 4 1 SOIL PROFILE <br /> Soil encountered at the site consisted primarily of silt, fine sandy silt, and fine to medium sand <br /> Generally, a mottled gray and brown, damp, firm to stiff, fine sandy silt was encountered at depths <br /> between 15 and 20 feet bsg A brown to mottled gray and brown, damp, medium dense, silty, fine to <br /> coarse sand was encountered at depths between 20 and 40 feet bsg Dark brown to mottled gray and <br /> brown, damp to moist, firm to stiff, fine sandy silt was encountered at depths between 40 and 55 feet <br /> bsg, and a mottled brown and gray, moist to saturated, medium dense silty fine sand was encountered <br /> at depths between 55 and 65 feet bsg Boring logs are included in Appendix A General lithology <br /> beneath the site in cross sectional view is depicted on Figure Nos 3 - Geological Cross Section A - <br /> A ' <br /> 4 2 FIELD EVIDENCE OF PETROLEUM HYDROCARBON-IMPACTED SOIL <br /> INeither petroleum hydrocarbon odor nor petroleum hydrocarbon vapor were detected from soil <br /> boring P-4 during drilling activities <br /> r <br /> 4 3 ANALYTICAL RESULTS OF SOIL, SAMPLES �� <br /> A total of four soil samples from P-4 were submitted to(a:MAI franalysis of TPH-d and BTEX <br /> Additionally, three soil samples were collected from the sto - soil cuttings and composited into <br /> Advanced GeoLnviromnenlni,luc <br /> I <br />