Laserfiche WebLink
31 January 1997 <br /> AGE-NC Project No.97-0298 <br /> Page 5 of 6 <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. Selected soil samples will be analyzed by a State-certified laboratory for TPH-g, BTE&X <br /> and MTBE in accordar�ce'with the appropriate EPA if, iethods. Selected soil samples may <br /> also be released to a State-certified laboratory for analysis of intrinsic permeability, moisture- <br /> content, porosity and total organic carbon in-accordance with'theappropriate EPA/AST'M <br /> methods. <br /> 11. Complete each soil boring in a ground water monitoring well..Each well will be completed <br /> using two-inch diameter PVC casings and twenty feet of 0.02-inch screen:A filter pack(42 <br /> Loriestar Sand)will be installed from total depth to two feet above the screened interval. A <br /> two Toot bentonite plug tivill 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 /> 12. Cuttings will be stored in properly labeled 1) O.T. model 17.11 55-gallon. drums on-site <br /> pending laboratory analysis and disposal. <br /> 13. Rinseate generated during drilling activities will be coiitainerized in properly labeled D.O.T. <br /> model 1714 55-gallon drums, and stored on-site in an area inaccessible to the general public. <br /> 14. Develop new monitoring wells utilizing a submersible pump until water is essentially <br /> sediment free. <br /> 15. Survey the top of each well casing to the nearest 1/1 06th of a foot to determine the elevation <br /> relative to a single well. <br /> 16. No sooner than 48 hours after installation of ground_,.eater monitoring wells,measure to the <br /> nearest 0.01 foot, the static water level in the new wells. <br /> 17. Using a dedicated bailer or submersible pump, surge and purge all wells. At least three well <br /> volumes of water will be removed from each well to stabilize temperature, pH, and <br /> conductivity; stabilization parameters will-be measured at one-well volume intervals. <br /> 18. Ground water samples will be collected using polyethylene disposable bailers; samples will <br /> be collected in 1-liter amber bottles and-40-m1 VOA vials preserved with hydrochloric acid. <br /> 19. Label and log water samples on a chain-of-custody.'form. <br /> 20. Store the samples in a chilled container and transport-under chain-of-custody procedure to <br /> a State-certified laboratory for analysis. Water samples will be analyzed for TPH-g, TPH-d <br /> BTE&X and MTBE,in accordance with EPA methods 5030/8015m,5030/8015m,8020/602 <br />