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E ' 23 June 2003 AGE-NC Project No 00-0769 ' Page 2 of 13 • Borings MW-4 and MW-5 were advanced to 200 feet bsg on-site, adjacent to CPT-6 and ' CPT-5, respectively, for collection of soil samples and Installation of monitoring wells, Bonngs MW-6 through MW-9 were advanced to 198 feet bsg off-site for monitoring well „ ' Installation, no soil samples were collected Bonng locations are Identified on Figure 2,boring logs with well construction diagrams are provided ' in Appendix C ' 3 1 1 Drilling and Sampling ' The soil borings were advanced using a CME-95HT drill rig equipped with 8 25-inch diameter hollow-stem augers The drill ng and three-man crew were supplied by West Haz Mat Drilling, Corp ' Soil samples from borings B-2 and MW-5 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 Samples were collected at five-foot intervals beginning at 5 feet bsg, using a 140-pound hammer to advance the sampler The number of blows required to advance the split-spoon sampler over each 6-inch Increment of the 18-Inch sampling interval was recorded on the boring logs Soil samples were preserved by-covering both ends of the leading or other selected sleeve with Teflon sheets, capping with plastic and sealing with tape - Continuous-cored soil samples beginning at 5 feet bsg were collected from boring MW-4,utilizing a 5-foot-long continuous core sampler Upon removal from the core sampler, selected soil sections ' were collected by pushing a 2-inch by 6-inch long brass sleeve into the recovered soil,then covering the exposed ends of the sleeves with Teflon sheets, capping with plastic and sealing with tape t The samples sleeves were labeled, stored on ice and transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL), a California Department of Health Services (DHS)-certified analytical laboratory Selected soil samples were analyzed for t • Total petroleum hydrocarbons quantified as gasoline (TPH-g) In accordance with EPA Method 8015 modified, t • Volatile organic compounds (VOCs), including benzene, toluene, ethyl benzene and total xylenes(BTEX)and the fuel additives methyl tertiary-butyl ether(MTBE),di-isopropyl ether (DIPE), ethyl tertiary-butyl ether(ETBE), tertiary-amyl methyl ether (TAME), and tertiary butanol(TBA), 1,2-dibromoethane(EDB)and 1,2-dichloroethane(1,2-DCA)in accordance • with EPA Method 8260B Advanced GeoEnvironmental,Inc