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13 June 1997 AGE-NC Project No 97-0330 Page 3 of 5 Idepth, time, date and sampler's initials The samples were logged on a chain-of-custody form, stored in a chilled container and transported I to a state-certified laboratory for analysis in accordance with EPA method 8015m for total petroleum hydrocarbons quantified as diesel (TPH-d), and in accordance with EPA method 8020 for volatile aromatics (benzene, toluene, ethyl benzene and xylenes BTE&X) I 3 4 LOGGING During probe boring activities, sample duplicates were monitored for the presence of organic vapor using a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene) and described on boring logs using the Unified Soil Classification System (USCS) Boring logs are summarized in Appendix A 3 5 EQUIPMENT DECONTAMINATION All sampling tools and brass sleeves used for sample collection were thoroughly rinsed with clean water after washing with a solution of Alconox All Geoprobe rods were cleaned prior to advancement in each probing I ' 40 FINDINGS 41 SOIL PROFILE ' Soil encountered at the site consisted primarily of silt, fine sandy silt, and a fine to medium sand Generally, a mottled gray and brown to pale brown, moist, fine sandy silt to silt was encountered from ' 15 to 25 feet bsg A mottled pale green to brown, moist, fine to medium sand was encountered at 30 and 35 feet bsg A mottled brown to dark gray, moist clay was encountered at 40 feet bsg, while a mottled brown to dark brown, moist silty sand was encountered at depths of 45 and 50 feet bsg Boring logs are included in Appendix A ' 4 2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL Faint petroleum hydrocarbon odor was detected in soil probe boring P-1 at depths from 15 and 20 ' feet bsg Organic vapor was detected using a PID in P-1 soil sample duplicates (15, 20 and 25 feet bsg) at concentrations as high as 13 0 parts per nvllion