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28 December 2004 AGE-NC Project No. 04-1238 Page 3 of 5 • Boring B-2 was advanced to a depth of approximately 20 feet bsg directly north ofthe former common UST pit; • Boring B-3 was advanced to a depth of approximately 20 feet bsg on the eastern edge of former common UST pit and; • Boring B-4 was advanced to a depth of approximately 20 feet bsg southeast of the former common UST pit. All sampling equipment was washed in an Alconox solution and rinsed twice with water prior to each sampling run. Soil boring locations are depicted on Figure 2. SOIL SAMPLE COLLECTION AND LOGGING Soil samples were collected from the borings at discrete five-foot intervals using a 1.5-inch Geoprobe soil sampling assembly loaded with four six-inch brass sleeves. For each soil sample collected,both ends of the second or other selected sleeve were covered with Teflon sheets, capped and sealed with tape. Each sample was properly labeled and stored on ice for transport to a State of California Department of Health Services (DHS)-certified laboratory for analysis. After soil sample preservation,soil was extruded from the remaining sleeves and described visually in accordance with the Unified Soil Classification System. GROUND WATER SAMPLE COLLECTION A ground water sample was collected from soil borings B-1 through B-4 following soil sample collection. Depth discrete ground water samples were collected using a five-foot section of pre-cleaned,one-inch diameter 0.010-inch slotted PVC well screen attached to blank PVC extended to surface grade. Once the terminal sample was collected,the PVC was inserted into the boring and in-situ ground water samples were extracted using 3/8-inch diameter polyethylene tubing fitted with a check valve which was lowered through the hollow center of the PVC piping into the screened section and manually pumped. Ground water samples were collected into a one-liter amber glass container and into three laboratory-supplied 40-m1 volatile organic analysis(VOA)vials with sample preservative.The samples were labeled and stored on ice for transport to a DHS-certified laboratory for analysis. Advanced GeoEnvicomncntal,Inc.