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• 25 January 2001 <br /> AGE-NC Project No 99-0559 <br /> Page 10 of 14 <br /> Soil sample duplicates will be monitored for the presence of organic vapor using a photo-ionization <br /> detector (PID Thermo Environmental 580A, 10 0 eV, calibrated to isobutylene) and the readings <br /> will be recorded on boring logs Soil sample duplicates will be visually described using the Unified <br /> Soil Classification System (USCS) and the descriptions will be recorded on the boring logs <br /> Grab ground water samples will be collected from within 2-inch diameter hollow-stem rods equipped <br /> with a four-foot, extendable 0 01-inch slotted PVC screen Grab ground water samples will be <br /> collected in selected intervals of saturated porous and permeable material The screen will be <br /> exposed at the selected depths and a stainless steel bailer will be used to retrieve the water samples <br /> Ground water samples for appropriate EPA analyses will be collected into 40-m1 volatile organic <br /> analysis (VOA) vials containing 0 5 ml of hydrochloric acid as a sample preservative <br /> After collection, the samples will be appropriately labeled and placed on ice and kept in a cooler <br /> until delivered to the laboratory for analysis Chain-of-custody protocols will be used to document <br /> sample custody transfer from the field to the analytical laboratory A chain-of-custody form will <br /> accompany the samples <br /> Proposed soil boring locations are illustrated on Figure 2 Following borehole advancement, portland <br /> . cement(grout mix) will be utilized to backfill each borehole from total depth utilizing a down-hole <br /> tremie pipe The PHS-EHD will be given a 48-hour inspection notice to inspect the grout mix and <br /> backfilling activities <br /> 62 MULTI-LEVEL GROUND WATER MONITORING WELL PILOT BORINGS <br /> Pilot soil borings will be advanced utilizing a truck-mounted, hollow-stem drill rig and 8-inch <br /> diameter hollow-stem augers Soil samples will be collected through the 8-inch hollow-stem augers <br /> a selected depths based on CPT findings Generally, discrete soil samples will be collected at points <br /> of significant lithologic variation using a California split-spoon sampler and brass sleeves <br /> The soil sampler will be driven by dropping a 140-pound weight from a height of 30 inches The <br /> number of blows required to drive each 6-inch length of the sampler(blow counts) are to be recorded <br /> on boring logs compiled by an AGE staff geologist <br /> Upon sample retrieval, the leading brass sleeve will be removed from the sampler The ends of the <br /> sleeve will be immediately covered with Teflon sheets and sealed with plastic end caps secured with <br /> tape The preserved samples will be immediately placed under ice in a chilled container for <br /> transportation to a DHS-certified laboratory Each soil sample sleeve will be labeled with boring <br /> location, vertical depth, sampling time, date and sampler's initials <br /> ,. Cuttings generated during drilling activities will be placed on and covered by plastic sheeting or will <br /> Advanced GcoLnvtronmentdl inc <br />