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I <br /> 17 April 2000 <br /> AGE-NC Project No 00-0696 <br /> Page 4 of 7 <br /> The hollow steel rods were then pulled out, and a screened casing was inserted Into the saturated <br /> zone Ground water was allowed to enter the casing, and samples were retrieved using a modified <br /> PVC tubing bailer Sufficient sample was collected from boring B-1 through B-4 to fill three 40-m1 <br /> I EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as a preservative Ground water <br /> sample containers were labeled with probe boring designation, date, time, and samplers Initials <br /> I The preserved sample was logged on a chain-of-custody form, placed in a chilled container and <br /> transported to a DHS-certified laboratory, selected samples were analyzed for <br /> • TPH-g by EPA Method 8015 Modified, <br /> • BTEX by EPA Method 602, and <br /> • TBA, DIPE, ETBE, TAME and MTBE by EPA Method 8260 Modified <br /> I3 1 3 Equipment Decontamination <br /> 1• Prior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly <br /> rinsed with clean water after washing with a solution of Alconox Geoprobe rods were thoroughly <br /> cleaned prior to soil probe boring advancement <br /> 1 <br /> 314 Logging <br /> During drilling activities, sample duplicates were monitored for the presence of organic vapor using <br /> an organic vapor meter equipped with a photo-ionization detector (PID Thermo Environmental <br /> I580A, 10 0 eV, calibrated to isobutylene) and were visually described on boring logs in accordance <br /> with the Unified Soil Classification System (USCS) Boring logs are included as Appendix A <br /> 4 0. FINDINGS <br /> Soil descriptions were utilized to construct the vertical and lateral soil model, laboratory analysis of <br /> soil and ground water samples were utilized to assess the hydrocarbon-impact on the two media <br /> 41 SOIL PROFILE <br /> Black, moist peat was encountered from surface grade to 5 feet bsg Generally, gray, damp to very <br /> . moist, fine sandy silt and silty clay was encountered from 10 feet bsg to depths of approximately 20 <br /> feet bsg Brown, saturated, silty fine sand was encountered from 20 feet bsg to 30 bsg Boring logs <br /> Advanced GeoEnvironmental,Inc <br />