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I v 1 29 October 1998 AGE-NC Project No 98-0448 ' Page 2 of 9 ' capping and sealing with tape Each preserved sample sleeve was labeled with soil bonng location, depth,time, date and sampler's Initials _ r Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and I transported to a California, Department of Toxic Substances Control (DISC)-certified laboratory, selected samples were analyzed in accordance with • EPA Method 5030/8015M for total petroleum hydrocarbons quantified as gasoilne (TPH- g), ' • EPA Method 8020 for volatile aromatics (benzene, toluene, ethyl benzene and xylene BTEX) with methyl-tertiary butyl ether(MTBE), ' • EPA Method 8260 modified for tertiary butanol (TBA),di-isopropyl ether(DIPS), ethyl tert butyl ether(ETBE) and tert amyl methyl ether (TAME), MTBE, and • ASTM Methods D5084 and D2974 for permeability, porosity, total organic content, bulk ' density and moisture The results of the soil analyses are contained in Tables 1 and 2, and are discussed in section 3 4 ' 2 12 Equipment Decontamination The hollow stem augers were steam cleaned prior to each bore hole advancement Sampling tools ' and brass sleeves used for sample collection were thoroughly washed with a solution of Alconox, and were thoroughly rinsed with clean tap water prior to each sampling run Following drilling ' activities, nnseate generated from decontaminating the equipment was placed in properly labeled D O T model 17H 55-gallon drums and was stored on-site in an area lacking public access Ir 213 Logging During drilling activities, sample duplicates were monitored for the presence of organic vapor using an organic vapor meter equipped with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV,calibrated to isobutylene) and were described on boring logs using the Unified Soil Classification Systdm (USCS) Bonng logs are included as Appendix A General lithology beneath the site in cross sectional view is depicted on Figures 3 and 4 E ` Advanced GeoEnvironmentai,Inc I