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21 April 1997 <br /> AGE-NC Project No, 95-0142 <br /> Page 3 of 4 <br /> boring locations are depicted on Figure 2. <br /> 4. Decontaminate all sampling equipment in an Alconox solution and rinse with water prior to <br /> each sampling run. Steam-clean auger flights before advancement of each boring. <br /> 5. Collect soil samples at 5-foot intervals in each boring beginning at a depth of 5-feet bsg. <br /> Samples will be collected using a California split-spoon sampler loaded with three 2-inch by <br /> 6-inch brass sleeves. The sampler will be driven by dropping a 140-pound weight from a <br /> height of 30 inches. The number of blow required to advance the sampler in 6-inch <br /> increments will be recorded on the boring log. <br /> 6. Preserve soil in the lead sleeve by covering both ends with Teflon sheets, capping, and <br /> sealing with tape. <br /> 7. Label and log samples on a chain-of-custody form. <br /> 8. Store samples in a chilled container and transport to a State certified laboratory for analysis. <br /> Selected soil samples will be analyzed for total petroleum hydrocarbons quantified as <br /> gasoline (TPH-g) and volatile aromatics (benzene, toluene, ethylbenzene and xylenes; <br /> BTE&X) and methyl tertiary-butyl ether (MTBE) in accordance with the EPA methods <br /> 9015m and 9020. <br /> 9. Monitor auger returns and soil sample duplicates for the presence of volatile organics using <br /> a photo-ionization detector (PID) pre-calibrated to isobutylene. <br /> 10. Log auger returns and soil sample duplicates in accordance with the Unified Soil <br /> Classification System. <br /> 11. Place auger returns and rinseate in 55-gallon DOT drums and store on-site. Disposal <br /> alternatives will be evaluated based on results of laboratory analyses. <br /> 12. Complete each boring as a ground water monitoring well using 25 feet of 0.020-inch slotted <br /> PVC screen. The proposed monitoring well completion is illustrated in Figure 3. <br /> 3.2. GROUND WATER SAMPLING <br /> 1. Survey the top of the well casing to the nearest 11100th of a foot relative to existing <br /> monitoring wells. <br /> 2. No sooner than 72 hours after installation, measure to the nearest 0.01 foot, the static water <br /> level in each monitoring well. <br /> 3. Using a submersible pump or dedicated bailer, surge and purge each monitoring well, At <br /> least three well volumes of water will be removed from each well to stabilize temperature, <br />