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I November 2005 AGE.-NC Project No. 97-0327 Page 7 of 8 5.0. FIELD PROCEDURES All field procedures will be overseen by an AGE representative under the supervision of a California Professional Geologist. Procedures for the advancement of paired CPT borings, probe borings. ground water sampling, monitoring well completion, equipment decontamination and sample shipment are outlined below. 5.1. CPT ADVANCEMENT Two CPT soil borings will be advanced vertically to total depths of approximately]00 feet bsg utilizing a 25-ton truck-mounted CPT drill rig equipped with 13/4-inch diameter hollow-stem rods. A hydraulic ram will be utilized to advance a cone penetrometer tip to total depth of each CPT boring. Soil parameters such as cone penetrometer tip resistance,sleeve friction, friction ratio(ratio between sleeve friction and tip resistance) and pore water pressure will be continuously measured as the cone penetrometer is advanced to total depth. A continuous boring log will be generated utilizing the Hogentogler Co. CPT computer program.The Hogentogler Co. computer program will utilize the CPT Soil Behavior Classification System (Robertson, P.K., Campanella, R.G, Gillespie. D. and Greig, J., 1986), to generate a general lithology type and display on a CPT boring log. Rinseate generated during drilling activities will be containerized in properly labeled Department of Transportation (DOT)-approved 55-gallon drums, and stored on-site in an area lacking public access. Disposal alternatives will be evaluated at a later date based on laboratory results of rinseate. 5.2. CPT GROUND WATER SAMPLFNG Multiple soil borings will be located adjacent each CPT boring (approximately 2 feet) to acquire independent grab ground water samples in each targeted zone. Based on CPT findings,discrete grab ground water samples will be collected in significant intervals of porous and permeable strata. A Hydro-Punch sample tool will be pushed into the specified zone, then withdrawn approximately three to four feet to expose an inlet screen. The interior of the sampling tool will fill with formation water. Then water from within the sampling rods will be purged using a Waterra inertia pump and dedicated tubing check bailer.Approximately five gallons of the ground water will be removed from the 2-inch diameter hollow-stem rod.The ground water will be sampled through the dedicated tubing equipped with 0.45 micron in-line field filter to isolate the dissolved phase hydrocarbons. All rinseate generated during drilling activities 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 transferred to laboratory-supplied containers. properly labeled and placed in a chilled container to be transported under chain of custody to a Advanced GeoEovironmental,Inc.