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LAO 02 October 2000 AGE-NC Project No. 00-699 Page 6 of 8 - 3.7. COLLECTION OF GROUND:WATER SAMPLES Water samples were collected from the purged well using new a disposable plastic bailer.Each water sample was transferred into 40-m1 VOA vials containing 0.5 ml 18%hydrochloric acid as a sample preservative, and into one f-liter amber bottle without sample preservative. After collection, thee- samples were properly labeled,placed in a chilled container and transported under chain-of-custody to y to Alphal Analytical Laboratories, Inc. (AAI), and were analyzed for: • TPH-g in accordance with GCFID 5030A; Los • TPH-d in accordance with EPA Method 8015M; • BTEX in accordance with EPA Method 8260B; and DIPE, ETBE, MTBE, TAME and TBA in accordance with EPA Method 8260B, - ry 4.0. FINDINGS 6 Stratigraphy observed during advancment of MW 1 at the site was found to be generally silts and sands with gravel encountered at approximately 30 feet to 40 feet bsg. Ground water levels were within the screen interval of the monitoring well; laboratory analysis of soil and ground water samples indicate no hydrocarbon impact to the samples analyzed. 2 ,A 4.1. STRATIGRAPHY Generally brown, damp silt was encountered between approximately 5 feet and 20 feet bsg. At 20 feet bsg the lithologywas damp,poorly-graded fine sand.Between 30 feet and 37 feet bsg,a medium sand with gravel graded downward to a gravel with coarse sand.Alternating silty sand and sandy silt were found from approximately.40 feet to 70 feet bsg. A boring log is included as Appendix A. Organic vapor was not detected in MW L PID data is included'on the boring log (Appendix A). 4.2. DEPTH TO GROUND WATER For the July 2000 sampling event,the depth to ground water was 59.04 feet below the top ofthe well casing. The ground water in well MW1 was'within the screened interval (49 feet to 69 feet bsg). Advanced GeoEnvironmental,Inc.