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I10 January 2001 AGE-NC Project No 98-0533 Page 2 of 6 " _ 32 SOIL SAMPLE COLLECTION AND ANALYSIS Discrete soil samples were collected ahead of the drill bit using a California-Modified split-spoon sampler loaded with three pre-cleaned 2-inch by 6-inch brass sleeves The samples were collected at five-foot intervals beginning at 5 feet bsg in borings B-3 and B-4 and at 15 feet bsg in B-1 and B- 2, using a 140-pound hammer to advance the sampler 18 inches The number of blows required to advance the sampler in 6--inch Increments (blow counts) was recorded on the boring logs Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets, Icapping and sealing with tape Each preserved sample sleeve,was labeled with soil boring location, depth, time, date and sampler's initials and was stored in a chilled container under ice Soil encountered in the borings were visually classified by an AGE geologist in accordance with the Unified Soil Classification System (USCS) Additionally, soil samples were field screened for the presence of volatile organic compounds using an organic vapor meter(OVM) Selected soil samples ' were transported under chain-of-custody to McCampbell Laboratories, Inc , a State of California Department of Health Services (DHS)-certified laboratory and were analyzed for 0 Total petroleum hydrocarbons quantified as aviation gasoline (TPH-ag)in accordance with EPA Method 5030/8015M, C Volatile aromatic hydrocarbons benzene, toluene, ethylbenzene and xylene (BTEX) with methyl. tertiary-butyl ether (MTBE) in accordance with EPA Method 8020, and Fuel oxygenates tertiary butanol (TBA), di-isopropyl ether (DIPE), ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME), and MTBE in accordance with EPA Method 8260B I 3 3 LOGGING } IThe soil sam le duplicates were utilized for field characterization The soil was screened for the presence op p f organic vapor using an organic`vapor ineter equipped with a photo-Ionization detector I (PID Thermo Environmental 580A, 10 OeV, calibrated to isobutylene), and the readings were recorded on the boring logs Soil was visually described in accordance with the Umfied Soil _ Classification'System (Boring Logs, Apprendix A) One grab ground water sample(B-2-75'-85')was collected from boring B-2 at between 75 to 85 feet bsg Samples from the grab ground water were collected into 40-m1 vials, labeled, placed in the chilled container and transported along with the soil samples to McCampbell Laboratories, Inc under chain-of-custody for analysis Advanced GeoEnvironmentai,Inc