Laserfiche WebLink
19 January 1996 <br /> AGE-NC Project No. 95-0118 <br /> Page 3 of 5 <br /> The IAS pilot test will be conducted by injecting air into two wells using a compressor-driven unit. <br /> Several parameters, including radius of influence, sparging rate, sparging vapor concentrations, <br /> ground water depths and dissolved oxygen, will be measured at each sparging point and at selected <br /> monitoring wells. Results of the SVE/IAS pilot test will be included in a Corrective Action Plan <br /> (CAP). <br /> 4.0. PROCEDURES <br /> 4.1. DRILLING AND SAMPLING <br /> For the drilling and sampling of soil borings/vapor extraction wells, the following procedures will be <br /> performed: <br /> 1. Prepare a Site Health and Safety Plan in accordance with the Occupational Safety and Health <br /> Guidance Manual for Hazardous Waste Site Activities - Prepared by National Institute for <br /> Occupational Safety and Health, Occupational Safety and Health Administration, U.S. Coast <br /> Guard and U.S. Environmental Protection Agency, October 1985. <br /> 2. Notify the PHS-EHD at least 48 hours prior to commencement of any work. <br /> 3. Drill two(2) soil borings at the site using a truck-mounted drill rig equipped with continuous- <br /> flight, 8-inch diameter hollow-stem augers. Each boring will be drilled to a depth of 50 feet <br /> below surface grade (bsg) and dual-completed for use as an SVE and IAS well. <br /> 4. Obtain soil samples in all borings at five-foot intervals using a split-tube sampler loaded with <br /> three pre-cleaned brass sleeves. <br /> 5. Preserve soil in the lead brass sleeve by covering both ends with Teflon tape or aluminum <br /> sheets, capping, and sealing with tape. <br /> 6. Label and log soil samples on a chain-of-custody form. <br /> 7. Store the samples under ice and transport the samples in a chilled container to a State- <br /> certified laboratory for analysis. <br /> 8. Log auger returns in accordance with the Unified Soil Classification System. <br /> 9. Screen auger returns and soil sample duplicates for the presence of volatile organics using a <br /> photo-ionization detector(PID) pre-calibrated to isobutylene. <br /> 10. Place auger returns on plastic sheeting and store on-site pending analytical results. <br /> 11. Decontaminate sampling equipment in an alconox solution and rinse twice with water prior <br /> to each sampling run. <br />