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08 January 1997 <br /> AGE-NC Project No. 95-0106 <br /> Page 3 of 5 <br /> 4.0. PROCEDURES <br /> 4.1. INSTALLATION OF GROUND WATER MONITORING WELLS <br /> The following procedures will be performed the installation of monitoring wells: <br /> 1. 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 two soil borings, using a truck-mounted drill rig, and 8.25-inch diameter hollow <br /> stem augers. Two borings will be advanced to depths of 15 feet. Boring locations will be <br /> approved by the PHS-EHD prior to drilling. <br /> 4. Decontaminate all sampling equipment in an alconox solution and rinse twice with water <br /> prior to each sampling run. Steam-clean auger flights before advancement of each boring. <br /> 5. Sample soil from each boring, beginning at 5 feet bsg, utilizing a California split-spoon <br /> sampler and pre-cleaned 2-inch by 6-inch brass sleeves. <br /> 6. Preserve soil in the brass sleeve by covering both ends with Teflon tape,capping,and sealing <br /> with tape. <br /> 7. Store the samples under ice and transport the samples in a chilled ice chest to a State- <br /> certified 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. Cuttings will be stored within plastic on-site. Disposal alternatives will be evaluated based <br /> on results of laboratory analysis. <br /> 11. Rinseate generated during drilling activities will be containerized in properly labeled D.O.T. <br /> model 17H 55-gallon drums, and stored on-site in an area inaccessible to the general public. <br /> 12. Complete the soil borings using a two inch diameter PVC casings and 0.02 screen from 3 to <br /> 15 feet in depth. A filter pack (42 Lonestar Sand) will be installed from 2 to 15 feet bsg. A <br /> one foot bentonite plug will be installed over the filter pack and the well will be grouted to <br /> the surface with Portland Cement. A traffic box will be installed with each well. <br /> 13. Selected soil samples will be analyzed for TPH-g, BTE&X and MTBE in accordance with <br /> the appropriate EPA methods. Selected soil samples may be released to a State-certified <br />