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05 June 2008 <br /> AGE-NC Project No. 95-0141 <br /> Page 5 of 8 <br /> 3.1. CPT ADVANCEMENT <br /> CPT sounding boring CPT2 will be advanced to a depth of 130 feet bsg or until refusal is <br /> encountered, utilizing a 25-ton truck-mounted CPT drill rig equipped with 2-inch diameter <br /> hollow-stem rods. CPT2 will utilize a hydraulic ram to advance a cone penetrometer to the desired <br /> depth. Soil parameters such as cone bearing, sleeve friction, and pore water pressure will be <br /> measured as the cone penetrometer is advanced.Rinseate generated during drilling activities will be <br /> containerized in properly labeled Department of Transportation(DOT)-approved 55-gallon drums, <br /> and stored on-site in an area lacking public access. Disposal alternatives will be evaluated at a later <br /> date based on laboratory results of rinseate. <br /> 3.2. CPT GROUND WATER SAMPLING <br /> Grab ground water samples will be collected using a HydroPunch sample tool that will be pushed <br /> into specified zones,then withdrawn approximately three feet to expose an inlet screen.The interior <br /> of the sampling tool fills with water,and a 1-inch outer diameter stainless steel bailer will be lowered <br /> and utilized to extract a ground water sample. All rinseate generated during drilling activities will <br /> be containerized in properly labeled DOT-approved 55-gallon drums, and stored on-site in an area <br /> lacking public access. <br /> Following sample collection,samples will be transferred to laboratory-supplied containers,properly <br /> labeled and placed in a chilled container to be transported under chain of custody to a <br /> CDPH-certified laboratory for analysis. <br /> 3.3. MONITORING WELL PILOT BORING DRILLING AND SOIL SAMPLING <br /> The soil boring will be advanced utilizing a truck-mounted,hollow-stem drill rig and 8-inch diameter <br /> hollow-stem augers. Cuttings and rinseate generated during drilling activities will be containerized <br /> in properly labeled DOT-approved 55-gallon drums, and stored on-site in an area lacking public <br /> access. Disposal alternatives will be evaluated based on the results of soil and water analysis. <br /> Soil samples will be collected at five-foot intervals,beginning at a depth of 70 feet bsg, utilizing a <br /> California split-spoon sampler and brass sleeves. The sampler will be driven by dropping a <br /> 140-pound weight from a height of 30 inches. The number of blows it takes to collect the samples <br /> will be recorded on boring logs.Upon soil sample retrieval,the middle brass sleeve will be removed <br /> from the sampler. The ends of the brass sleeve will be immediately covered with Teflon sheets, <br /> sealed with plastic end caps, secured with tape,and placed in a chilled container for transportation <br /> under chain of custody to a CDPH-certified laboratory.Each sample sleeve will be labeled with the <br /> Advanced GeoEnvironmental,Inc. <br />