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I' <br /> 05 September 2002 <br />' AGE-NC Project No 02-0927 <br /> Page 3 of 6 <br /> S <br /> 3 1 PROBE BOrRING ADVANCEMENT <br />' Soil probe boring P-7 were advanced utilizing a van-mounted Geoprobe 5400 equipped with 1 125-- <br /> inch diameter probe rods with an attached 2 15-inch diameter soil sampler, using "direct push" <br /> technology The probe boring was advanced vertically to a depth of 55 feet bsg <br />' 3 2 SOIL SAMPLING AND ANALYSIS <br /> Discrete soil samples,were collected from the boring at 5-foot intervals, beginning at 20 feet bsg to <br />' a total depth of 50 feet bsg Soil samples were collected using a Geoprobe soil sampling assembly <br /> loaded with four pre-cleaned 1 125-inch by 6-inch brass sleeves One sleeve of each soil sample was <br /> preserved by covering both ends of the brass sleeve with Teflon sheets, capping, and seating with <br />' tape Each sample sleeve was labeled with the soil probe boring location, depth, time, date and <br /> sampler's initials <br />' Each preserved sample was logged on a chain-of custody form, placed in a chilled container and <br /> transported to Cal Tech Environmental Laboratories (CTEL), a State of California Department of <br />' Health Service-certified laboratory Selected samples were analyzed for the following <br /> • TPH-g in accordance with EPA Method 8015 Modified, <br /> tBenzene,toluene, ethylbenzene and total xylenes (BTEX) and fuel additives methyl tertiary- <br /> butyl ether(MTBE), tertiary-butyl alcohol(TBA), di-isopropyl ether(DIPE), ethyl tertiary- <br /> butyl ether(ETBE),tertiary-amyl methyl ether(TAME), 1,2-dibromoethane(EDB)and 1,2- <br /> dichloroethane (1,2-DCA) m accordance with EPA Method 8260B <br /> 33 SOIL LOGGING - <br /> The duphcate sleeves of each soil sample were monitored for the presence of organic vapor using <br /> an organic vapor meter equipped with a photo-iomzahon detector (PID Thermo Environmental <br />' 580A, 10 0 eV, calibrated to isobutylene) and were visually described on boring logs in accordance <br /> with the Unified Soil Classification System(USCS) Boring logs are included as AppendixA <br />' Advanced GeoEnvironmental,Fnc <br />