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19 May 2005 AGE-NC Project No. 02-0926 Page 4 of 5 3.0. 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. 3.1. CPT ADVANCEMENT The CPT soil borings will be advanced to a depth of 100 feet bsg or until refusal is encountered utilizing a 25-ton truck-mounted CPT drill rig equipped with 2-inch diameter hollow-stem rods.At the boring location,the first soil boring will utilize a hydraulic ram to advance a cone penetrometer to the desired depth. Soil parameters such as cone bearing, sleeve friction and pore water pressure will be measured as the cone penetrometer is advanced.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. 3.2. CPT GROUND WATER SAMPLING A second soil boring will be located adjacent to the first CPT boring for ground water sample collection. Based on CPT findings, discrete grab ground water samples will be collected in significant intervals of porous and permeable strata.A HydroPunch sample tool will be pushed into the specified zone,then withdrawn approximately three feet to expose an inlet screen.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 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 inline 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 DHS-certified laboratory for analysis. Advanced GeoEnvironn ental,Inc.