Laserfiche WebLink
07 April 1997 <br /> AGE-NC-95-0103 <br /> Page 3 of 5 <br /> 3. Complete the initial soil boring as ground water monitoring well using 20-feet of 0.020- <br /> slotted 2-inch diameter PVC casing.A sand filter pack will be installed to a depth of two feet <br /> above'the screen interval and a bentonite plug will be placed two-feet above the sand pack. <br /> Seal the well with Portland cement to the surface and complete the well with a traffic rated <br /> well box. <br /> 4. Complete Advance two soil borings using a truck-mounted drill rig equipped with eight-inch, <br /> hollow-stem augers. The boring for the installation of the ground water monitoring well shall <br /> be advanced to a depth of approximately 30 feet. The boring for the installation of the soil <br /> vapor extraction well shall be advanced to a depth of approximately 15 feet. <br /> 5. Collect soil samples at 5-foot intervals in each boring. Soil samples will be logged in <br /> accordance with the Unified Soil Classification System. Soil sample duplicates will be <br /> screened for the presence of organic vapors using a photo-ionization detector(PID: Thermo <br /> Environmental 580A, calibrated to isobutylene). <br /> 6. Collect and preserve soil samples in brass sleeves by covering both ends of each sleeve Nvith <br /> Teflon or aluminum sheets, capping and sealing with tape. <br /> 7. Decontaminate sampling equipment in an Alconox solution and rinse with water prior to <br /> each sampling run. <br /> 8. Label and log samples on a chain-of-custody form. <br /> 9. Store samples in a chilled container and transport to a state-certified laboratory. Selected soil <br /> samples will be analyzed for TPH-g, BTE&X and MTBE. <br /> 10. Complete soil boring(s)for ground water monitoring wells using 20-feet of 0.020-slotted 2- <br /> inch diameter PVC casing. A sand filter pack will be installed to a depth of two feet above <br /> the screen interval and a bentonite plug will be placed two-feet above the sand pack. Seal the <br /> well with Portland cement to the surface and complete the well with a traffic rated well box. <br /> The ground water well design is illustrated on Figure 3. <br /> 11. Complete soil boring(s) for vapor recovery wells using 10-feet of 0.020-slotted 2-inch <br /> diameter PVC casing. A sand filter pack will be installed to a depth of two feet above the <br /> screen interval and a bentonite plug will be placed two-feet above the sand pack. Seal the <br /> well with Portland cement to the surface and complete the well with a traffic rated well box. <br /> Vapor recovery well design is illustrated on Figure 4. <br /> 12. Place auger returns on plastic sheeting or DOT-approved drums and store on-site pending <br /> analytical results of soil samples. <br />