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.r <br /> 15 July 1998 <br /> AGE-NC Project No, 98-0450 <br /> Page 4 of 5 <br /> 4.0. PROCEDURES <br /> 4.1. INSTALLATION OF GROUND WATER MONITORING WELLS <br /> For the collection of soil samples and well installation, the following procedures will be performed. <br /> 1. Prepare a site health and safety plan in accordance with Occupational Safety and Health <br /> Guidance Manual for Hazardous Waste Site Activities (Prepared by National Institute for <br /> Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental <br /> Protection Agency, 1985), <br /> 2. Notify the PHS-EHD 48 hours prior to commencement of any work, while securing proper <br /> city/county soil boring permits and neighboring site access. <br /> 3. 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 /> 4. Initially, advance nine soil borings using 8.25-inch hollow stem augers. Soil boring will be <br /> advanced to a minimum depth of 30 feet bsg. If field conditions indicate that impacted soil <br /> is present at greater depths, borings will be advanced to 50 or 70 feet bsg, based on field <br /> measured hydrocarbons. <br /> 5. Decontaminate sampling equipment in an Alconox solution and rinse twice with water prior <br /> to each sampling run. <br /> 6. Obtain discrete soil samples at depths of five-foot intervals utilizing a California split-spoon <br /> sampler and pre-cleaned 2-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 form. <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 Nvith a photo-ionization detector (PID) pre-calibrated to isobutylere. <br /> n <br /> 10. Log borings in accordance with the Unified Soil Classification System. <br /> 11. Convert a minimum of one soil boring into a ground water monitoring well as depicted in <br /> �`- Figure 3 and completed two soil borings as soil vapor extraction wells as depicted in Figure <br /> 4. <br /> 12. Use a surge block or bailer during the construction of the ground water well to set the sand <br /> filter material, prior to installation of the bentonite transition seal. <br /> Adrauced GcoEnvironmcnul,Inc. <br />