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I ! 17 October 2003 ' AGE-NC Project No 02-0964 Page 2 of 8 ' 0 CPT-4 was established south of monitoring well MW-1 and soil bonngs E and G to a depth of 150 feet bsg, and ' 0 CPT5 was advanced at the northeast corner of the intersection of California Street and Miner Avenue to total depths of 160 bsg ' At each boring location, the soil parameters of piezocone tip resistance, sleeve friction and pore water pressure were continuously measured as the piezocone was advanced to depth Utilizing the ' soil parameters, the Hogentogler Co computer program interpreted general lithology types based on the CPT Soil Behavior Classification System (Robertson, P K , Campanella, R G, Gillespie, D, and Greig, J , 1986) and displayed the interpreted hthologies on a continuous CPT boring log The ICPT interpretive logs are presented in Appendix B R[nseate generated during drilling activities was containerized in properly labeled DOT-approved ' 55-gallon drums and was stored on-site in an area lacking public access The CPT soil borings were backfilled over their entire depth range with a bentonite/portland cement grout mix �• 22 GROUND WATER AND SOIL SAMPLE COLLECTION IGrab ground water and soil samples were collected in a twin soil bonng advanced immediately adjacent to the initial CPT bonng The samples were collected utilizing the 25-ton truck-mounted I CPT drill ng equipped with 1 75-inch diameter hollow-stem rods fitted with a HydroPunch ground water or a piston soil sampling assembly, which was pushed to specified sampling depths in each soil boring, diagrams of the sampling assemblies are illustrated in Appendix B IGround water or soil samples were collected from specified depth intervals (zones) based on the acquired CPT-hthology data indicating favorable conditions for sampling For ground water, a ' HydroPunch sampling tool was pushed into the specified zone, then withdrawn approximately four feet to expose an inlet screen, the interior of the sampling tool filled with water and a 1-inch outer diameter(O D ) stainless steel bailer was lowered and utilized to extract a ground water sample For soil, a steel-tipped soil sampler was pushed into the specified zone, then the tip was withdrawn to expose a core barrel, the soil sampler was pushed down again to retneve a 1-foot soil sample Ground water sample was collected from CPT boring locations at the following intervals • CPT-1 was sampled between 96 and 100 feet bsg,between 120 and 124 feet bsg and between 146 feet and 150 feet bsg, IAdvanced GeoEnviron mental,[nc