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29 September 2003 <br /> AGE-NC Project No. 01-0865 <br /> Page 7 of 10 <br /> Following sample collection, the samples will be placed in laboratory-supplied containers and <br /> transported under chain-of-custody to a DHS-certified laboratory.Proposed soil boring locations are <br /> illustrated on Figure 2.Following CPT advancement the total depth of the boring will be backfilled <br /> with type III portland neat cement and not more than 6 gallons of water per 94-pound sack of <br /> cement. The grout will be placed by pumping through tremie pipe. A grouting inspection will be <br /> scheduled with EHD personnel. <br /> 5.3. MONITORING WELL ABANDONMENT <br /> Monitoring well MW-1,(Figure 3)will be abandoned utilizing a truck-mounted drill rig equipped <br /> with 8-inch hollow stem augers. The well will be over-drilled from surface grade to total depth of <br /> the well. The boring will be backfilled to surface grade using Type IT portland neat cement and not <br /> more than 6 gallons of water per 94-pound sack of cement. <br /> 5.4. MONITORING WELL DRILLING AND SOIL SAMPLING <br /> Soil borings will be advanced utilizing a truck-mounted,hollow-stem drill rig and 8-inch diameter <br /> hollow-stem augers. Cuttings generated during drilling activities will be placed on plastic sheeting <br /> and covered.Rinseate will be containerized in properly labeled DOT-approved 55-gallon drums,and <br /> stored on-site in an area lacking public access. Disposal alternatives will be evaluated based on <br /> results of soil and water analysis. <br /> Soil samples will be collected at five-foot intervals, beginning at a depth of 5 feet bsg, and at <br /> significant lithologic contacts identified during the CPT investigation, utilizing a California <br /> split-spoon sampler and brass sleeves. The sampler will be driven by dropping a 140-pound weight <br /> from a height of 30 inches (blow counts). The blow counts will be recorded on boring logs. Upon <br /> soil sample retrieval,a selected brass sleeve will be removed from the sampler.The ends of the brass <br /> sleeve will be immediately covered with Teflon sheets, sealed with plastic end caps, secured with <br /> tape and immediately placed in a chilled container for transportation under chain of custody to a <br /> state-certified laboratory.Each sample sleeve will be labeled with the boring location,sample depth, <br /> sample time, sampling date and sampler's initials. <br /> During sampling activities, sample duplicates will be monitored for the presence of organic vapor <br /> using a photo-ionization detector (PID: Thermo Environmental 580A, 10.0 eV, calibrated to <br /> isobutylene) and will be visually described on boring logs using the Unified Soil Classification <br /> System(USCS). <br /> Advanced GeoFnvlronmcntal,Inc <br />