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08 November 2002 AGE-NC Project No.02-0918 Page 3 of 9 3.1. DRILLING On 26 and 27 June 2002, four soil borings B1 though B4 were advanced to a depth of 50 feet bsg utilizing a CME-75HT drill rig, equipped with 8.25-inch diameter hollow-stem augers for the collection and analysis of soil samples and installation of three ground water monitoring wells.The drill rig and crew were supplied by West Haz Mat Drilling of Rancho Cordova, California. Auger returns generated by drilling were containerized in properly labeled DOT-approved model 17H 55-gallon drums and was stored on-site pending laboratory analysis and disposal at a licenced facility or aeration. Soil borings BI and B2[MW-1] were advanced in the former UST excavation (Figure 2). Soil borings B3[MW-2] and B4 [MW-3] were established near the northeast and southeast corners, respectively,of the former UST dispenser area. 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS Soil was collected continuously from boring B i using a split tube,3-inch diameter core sampler.The sampler was advance with the progression of the boring and soil sample were collected in clean, 2 x 6-inch brass sleeves. Samples were collected from the remaining borings at five-foot intervals using a California-modified split spoon sampler loaded with three clean, 2 X 6-inch brass sleeves. A 140-pound hammer was used to advance the sampler 18 inches; the number of blows required to advance the sampler over each 6-inch increment was recorded on the boring logs. All sampling equipment was washed in an Alconox solution and rinsed twice with water prior to each sampling run. For each soil sample collected,both ends of the leading or other selected sleeve were covered with Teflon sheets,capped and sealed with tape.The samples were labeled,stored on ice and transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL) a State of California Department of Health Services (DHS)-certified analytical laboratory. Selected samples were analyzed for: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) by EPA Method 8015 Modified; and • Benzene,toluene,ethylbenzene and total xylenes (BTEX) and Oxygenated fuel additives - methyl-tert-butyl ether (MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether(ETBE), tertiary amyl methyl ether (TAME),ethylene dibromide Advanced GeoEnvironmenfal,Inc.