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I30 August 2044 AGE-NC Project No 99-0592 IPage 7 of 13 I attached to the hollow-stem rod assembly to total depth of each soil boring Soil borings for sounding were as follows CPT-1 was established 10 feet down gradient (northeast) from MW-1 ' At the boring location, the soil parameters of cone penetrometer tip resistance, sleeve friction and pore water pressure were continuously measured as the cone penetrometer 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 lithologies on a continuous CPT boring log The CPT Interpretive logs are presented in Appendix D IRinseate generated during drilling activities was containerized in properly labeled Department of Transportation (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 I4 2 GROUND WATER AND SOIL SAMPLE COLLECTION • Grab ground water and soil samples were collected in a twin soil boring advanced immediately adjacent to the Initial CPT boring The samples were collected utilizing the 25-ton truck-mounted CPT drill rig equipped with 1 75-inch diameter hollow-stem rods fitted with a HydroPunch ground water sampling assembly or a piston soil sampling assembly and pushed to specified sampling depths Ground water or soil samples were collected from specified depth intervals (zones) based on the acquired CPT-lithology data indicatmg'favorable conditions for sampling For ground water, a I HydroPunch sampling tool was pushed into the specified zone, then the rods were withdrawn approximately four feet to expose an inlet screen, the interior of the sampling tool filled with water and a 1-inch outer diameter(O D )stainless steel bailer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a ground water sample For soil samples, a steel-tipped soil sampler was pushed into the specified zone,then the tip was withdrawn to expose a core barrel, the soil sampler was pushed down again to retrieve a 1-foot soil sample ` ' Three ground water samples were collected from the twin soil boring at intervals of 63 feet to 67 feet bsg, 81 feet to 85 feet bsg, and 100 feet to 103 feet bsg Soil samples were collected at 63 feet and 95 feet bsg Following sample collection, the samples were placed in laboratory-supplied containers, properly labeled and transported under chain ofcustody to Cal Tech Environmental Laboratories,Inc(CTEL) IAdvanced GeoEnvironmental,Inc i