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07 January 1998 <br /> AGE-NC Project No 95-0128 <br /> Page 5 of 7 <br /> to each sampling run / <br /> 6 Obtain discrete soil samples at depths of 30, 35 and 40 feet using a Geoprobe soil sampler <br /> assembly loaded with pre-cleaned 1125-inch by 6-inch brass sleeves <br /> 7 Preserve soil in the second brass sleeve by covering both ends with Teflon sheets, capping, <br /> and sealing with tape Label and log samples on a chain-of-custody farm <br /> 8 Store the samples under ice and transport the samples in a chilled container to a state- <br /> certified laboratory for analysis <br /> 9 Screen soil sample duplicates for the presence of volatile organics using an organic vapor <br /> analyzed equipped with a photo-ionization detector (PTD) pre-calibrated to isobutylene <br /> 10 Log borings in accordance with the Unified Soil Classification System <br /> 11 Collect a ground water samples from the probe borings The ground water sample will be <br /> collected using a Geoprobe water sampling assembly The samples will be collected in 40- <br /> ml EPA approved VOA vials and 1-liter amber bottles using a Geoprobe water sampling <br /> assembly <br /> • 12 Backfill each probe boring using a concrete slurry through a tremie pipe, through the entire <br /> depth of the probe boring in accordance with the well standards (section 13 17 8) <br /> 13 Selected soil samples and each ground water samples will be analyzed for total petroleum <br /> hydrocarbons quantified as gasoline (TPH-g), volatile aromatics (benzene, toluene, ethyl <br /> benzene and total xylenes BTE&X) and methyl-tert-butyl ether (MTBE) and other <br /> oxygenated fuel additives tertiary butyl alcohol (TBA), di-isopropyl ether (DIPS), ethyl <br /> tertiary butyl ether(ETBE) and tertiary amyl methyl ether(TAME) in accordance with EPA <br /> methods 8015m/5030 and 8020/602 and 8260/8240 If field observations indicate that other <br /> petroleum hydrocarbons are present, additional analysis may be necessary <br /> 4 2 INSTALLATION OF GROUND WATER MONITORING WELLS <br /> The following procedures will be performed for installation of the monitoring wells <br /> 1 Advance soil borings using a truck-mounted drill rig Two borings will be advanced to <br /> depths of 45 feet bsg using 8 25-inch hollow stem augers and two soil boring will be <br /> advanced to a depth of 60 feet bsg using 10-inch diameter hollow-stem augers for dual- <br /> completion Location of the wells shall be based on the analytical data collected from the <br /> grab water samples and concurrence from the PHS-EHD <br /> . 2 Decontaminate all sampling equipment in an Alconox solution and rinse twice with water <br /> Advanced GeoEns ironmental,Inc <br />