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08 January 1996 <br /> AGE-NC Project No. 95-0105 <br /> Page 5 of 6 <br /> 4.2. INSTALLATION OF GROUND WATER MONITORING WELLS <br /> The following procedures will be performed for the installation ofmonitoring wells: <br /> I. Notify the PHS-EHD 48 hours prior to commencement of any work, while securing proper <br /> city/county soil boring permits. <br /> 2. Boring locations will be marked at least 48 hours in advance for an Underground Service <br /> Alert (USA) check of underground utilities or pipes. <br /> 3. Advance soil borings using a truck-mounted drill rig, and 8.25-inch diameter hollow stem <br /> augers. The boring will be advanced to depths of 15 feet. The boring location will be <br /> approved by the PHS-EHD prior to drilling. <br /> 4. Decontaminate alt sampling equipment in an alconox solution and rinse twice with water prior <br /> to each sampling run. Steam-clean auger flights before advancement of each boring. <br /> 5. Sample each boring, beginning at 10 feet bsg, utilizing a California split-spoon sampler and <br /> pre-cleaned 2-inch by 6-inch brass sleeves. <br /> 6. Preserve soil in the brass sleeve by covering both ends with aluminum foil or teflon tape, <br /> capping, and sealing with tape. <br /> 7. Store the samples under ice and transport the samples in a chilled ice chest to a State certified <br /> laboratory for analysis. <br /> 8. Screen soil sample duplicates for the presence of volatile organics using a photo-ionization <br /> detector (PID) pre-calibrated to isobutylene. <br /> 9. Log borings in accordance with the Unified Soil Classification System. <br /> 10. Selected soil samples will be analyzed for TPH-d and BTE&X in accordance with the <br /> appropriate EPA methods. <br /> 11. Cuttings and rinseate generated during drilling activities will be containerized in properly <br /> labeled D.O.T. model 17H 55-gallon drums, and stored on-site in an area inaccessible to the <br /> general public. Disposal alternatives will be evaluated based on results of laboratory analyses. <br /> Convert the bore(s) as a two-inch diameter monitoring well(s) in accordance with the well <br /> design in Figure 3, <br /> 12. Develop new monitoring wells utilizing a submersible pump until water is essentially sediment <br /> free. <br /> 13. Survey the top of each well casing to the nearest 11100th of an inch to determine the elevation <br /> relative to existing wells. <br /> 14. No sooner than 48 hours after installation of ground water monitoring wells, measure to the <br />