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' 14 S tember 2001 i � , AGE-NC Project No 95-0109 Page 6 of 9 ' 4.0. FIELD PROCEDURES All field procedures will be overseen by an AGE representative under the supervision of a California _ ' Registered Geologist Procedures for the advancement of soul borings, soil sampling, ground water sampling, monitoring well installation and development, equipment decontamination, and sample , shipment are outlined below 1' ' 41 CPT ADVANCEMENT Each CPT soil boring will be advanced to a depth of approximately 150 feet bsg utilizing a 25-ton w truck-mounted CPT drill rig equipped with,2'-inch diameter hollow-stem rods The initial soil boring ' in each location will utilize a hydraulic ram to advance a cone penetrometer to the desired depth Soil parameters such as cone bearing, sleeve friction, friction ration and pore water pressure will be ' measured as the cone penetrometer is advanced The data will be utilized to obtain a computer- generated interpretation of the penetrated soil lithology Rinseate generated during drilling will be containenzed in properly labeled Department of Transportation(DOT)-approved 55-gallon drums, and stored on-site Disposal alternatives will be evaluated at a later date based on laboratory results of rmseate 4 2 CPT GROUND WATER SAMPLING ` ' A second,paired ortwinned soil bonng will be located adjacent to the initial CPT borings forground water sample collection Based on the CPT findings,discrete groundwater samples will be collected in saturated intervals of sigmf cantly porous and permeable strata beginning at or below 80 feet bsg ' A HydroPunch sample tool will be pushed into the specified zone,then withdrawn approximately three feet to expose an inlet screen The interior of the sampling tool should fill with water and a 1-inch outer diameter (O D ) stainless steel bailer will be lowered and utilized to extract a ground ' water sample All rinseate generated during sampling will be containenzed in properly labeled DOT-approved 55-gallon drums, and stored on-site pending laboratory analysis of ground water samples I s Following sample collection, the samples will be placed in laboratory-supplied containers and ' transported'under chain-of-custody to a DHS-certified laboratory for analysis as descnbed above The samples will be transferred from the bailer into four 40-m1 EPA-approved volatile organic analysis (VOA) vials containing 0 5 ml HCI as a sample preservative Each sample container will 'r be labeled with the bonng/well designation, sampled interval, date, time and sample collector's initials Advanced GeoEnvaronmental,Inc s , t ,