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• 05 September 20I02 ' AGE-NC Project No 02-0927 " Page 4 of 6 I3 4 GROUND WATER SAMPLING AND ANALYSIS IOne grab ground water sample was collected from the probe boring using a temporary PVC screen The probe rods were advanced to approximately 50 feet bsg The hollow steel rods were then pulled ' out, and a screened casing was inserted into the saturated zone Ground water was allowed to enter the casing, and samples were retrieved using a modified PVC tubing bailer Sufficient sample was collected from each boring to fill four 40-m1 EPA-approved volatile organic analysis (VOA) vials I contammg 0 5 ml 18%hydrochloric acid as a sample preservative Ground water sample containers were labeled with probe boring designation, date,time, and sampler's initials The preserved samples were logged on a chain-of-custody form, placed in a chilled container and transported to CTEL for ' analysts Each grab ground water sample was analyzed for • TPH-g in accordance with EPA Method 8015 Modified, IBTEX and MTBE,TBA,DIPS,ETBE, TAME,EDB and 1,2-DCA by EPA Method 8260B I� 3 5 EQUIPMENT DECONTAMINATION ' Prior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly rinsed with clean water after washing with a solution of Alconox Geoprobe rods were thoroughly ' cleaned prior to soil probe boring advancement ' 4.0. FINDINGS ' Soil descriptions were utilized to construct the site geological model, laboratory analysis of soil and ground water samples were utilized to assess the petroleum hydrocarbon-impact on soil and ground water L - 1 - 4 1 - SOIL PROFILE 1' f Generally,light to moderate yellowish brown,+damp to saturated,silt and silty sand were encountered ' from approximately 20 feet bsg to 50 feet bsg Moderate yellowish brown, damp, silty lean clay was encountered at 30 feet bsg A boring log is included in Appendix A ' Advanced GeoEnvironmenW,Inc