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. 08 August 2001 AGE-NC Project No 99-0657 Page 7 of 10 4 2 CPT SOIL AND GROUND WATER SAMPLING A second, or paired, soil boring will be located adjacent to the first CPT boring for soil and ground water sample collection Based on CPT findings, discrete soil and ground water samples will be collected at depths in excess of 50 feet bsg and in areas of lithologic variation Soil samples will be collected utilizing a 2-inch diameter piston soil sampling assembly loaded with a pre-cleaned brass sleeve Upon soil sample retrieval, the brass sleeve will be removed from the sampler The ends of the brass sleeve will be immediately covered with Teflon or aluminum sheets, sealed with plastic end caps, secured with tape and immediately placed in a chilled container for transportation to a DHS -certified laboratory Each sample sleeve will be labeled with the location, boring designation, depth, time, date and sampler's initials Based on CPT findings, discrete grab ground water samples will be collected in significant intervals of porous and permeable strata beginning at 50 feet bsg A HydroPunch sample tool will be pushed into the specified zone, then withdrawn approximately three feet to expose an inlet screen The interior of the sampling tool fills with water and a 1-inch outer diameter(O D ) stainless steel bailer will be lowered and utilized to extract a ground water sample Grab ground water samples will be • collected in selected intervals of porous and permeable material All nnseate generated during drilling will be containerized in properly labeled DOT-approved 55-gallon drums, and stored on-site in an area lacking public access Following sample collection, the samples will be placed in laboratory-supplied containers and transported under chain-of-custody to a DHS-certified laboratory Proposed soil boring locations are illustrated on Figure 2 Following borehole advancement,portland cement (grout mix) will be utilized to backfill each borehole utilizing a tremae pipe The PHS-EHD will be given the opportunity to inspect the grout mix prior to backfilling activities 4 3 MONITORING WELL BORING DRILLING AND SOIL SAMPLING Soil borings will be advanced utilizing a truck-mounted, hollow-stem drill ng and 8-inch diameter hollow-stern augers Cuttings generated during drilling activities will be placed on plastic sheeting and covered Rmseate will be containerized in properly labeled DOT-approved 55-gallon drurns,and stored on-site in an area lacking public access Disposal alternatives will be evaluated based on results of soil and water analysis Soil samples will be collected at five-foot intervals, beginning at a depth of 5 feet bsg, and at . significant lithologic contacts identified during the CPT investigation, utilizing a California split-spoon sampler and brass sleeves The sampler will be driven by dropping a 140-pound weight Advanced GeoEnvironmental,Inc