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10 January 2005 AGE-NC Project No. 04-1224 Page 4 of 6 profiles are provided in Appendix B. 3.4. GROUND WATER COLLECTION AND ANALYSIS Ground water samples were collected from all soil boring locations following soil sample collection. Depth-discrete ground water samples were collected using a ten-foot section ofpre-cleaned,one-inch diameter 0.010-inch slotted PVC well screen attached to blank PVC extended to surface grade.Once the fifteen foot soil 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.Each ground water sample was transferred into laboratory-supplied 40-milliliter (ml) volatile organic analysis (VOA) vials containing 0.5 ml hydrochloric acid (18%) as a sample preservative.After collection,the samples were properly labeled,placed on ice and transported under chain of custody to CTEL. The samples were analyzed for the same constituents listed in Section 3.2.. On 09 December 2004, a ground water sample was collected from the on-site domestic well. To ensure that formation water was being produced, water was allowed to run out of the well for approximately 15 minutes. Then ground water was poured directly into 40-m1 VOA vials from a faucet at the well head. After collection, the samples were properly labeled, placed in a chilled container and transported under chain of custody to CTEL to be analyzed for: • Volatile organic compounds BTEX and the fuel additives DIPE,ETBE,MTBE,TAME and TBA in accordance with EPA Method 8260B. 4.0. FINDINGS The stratigraphy and ground water hydrogeology underlying the site was characterized from field descriptions. Hydrocarbon-impact to the soil and ground water was assessed by laboratory analysis. 4.1. STRATIGRAPHY At a depth of 5 feet bsg, orange-brown sand was encountered east of the building, whereas green- brown clay was encountered west of the building. Brown to gray-blue clayey silt to silty sand was encountered at 10 feet bsg, and gray-blue to blue-gray sand to silty sand was encountered at 15 feet bsg at all boring locations. A gray-blue silty clay was identified beneath the sand at the west side of the building. The soil boring logs are provided in Appendix B. Advanced GeoEnvironmental,Inc.