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. os rune 2003 AGE-NC Project No 95-0135 Page 2 of 7 Utilizing the soil parameters, the Ho ento ter Co coin ute,r program interpreted general litholo gY 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 llthologles on a continuous CPT boring log The CPT interpretive logs are presented in Appendix A Rinseate generated during dnlling 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 2 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 mitral CPT boring The samples were collected utilizing the 25-tan truck-mounted , 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 , N �. Ground water or soil samples were collected from specified depth intervals (zones) based on the acquired CPT-lithology 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conditions for sampling For ground water, a ' HydroPunch sampling tool was pushed into the specified zone,then withdrawn approximately four feet to expose an inlet screen, the interior of the sampling tool filled with water and a 1-inch outer diameter(O D )stainless steel bailer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a ground water sample For 'soil, a steel-tipped soil sampler was pushed into the specified zone, then the tip was withdrawn to expose a core barrel, the soil sampler was pushed down again to retrieve a 1-foot soil sample ' Ground water sample was collected from CPT boring locations at the following intervals O CPT-1 was sampled between 84 feet and 88 feet bsg and between 111 feet and 115 feet bsg, ' 0 CPT-2 was sampled between 76 feet and 80 feet bsg and between 111 feet and 115 feet bsg, CPT-3 was'sampled between 51 feet and 55 feet bsg, between 71 feet and 75 feet bsg, ' between 96 feet and 100 feet bsg and between 118 feet and 122 feet bsg, and CPT-4 was sampled between 78 feet and 82 feet bsg and between 121 feet and 125 feet bsg, Soil samples were collected from boring CPT-4 at 60 and 75 feet bsg , ' Following sample collection, the samples were placed In laboratory-supplied containers, properly . labeled and transported under chain-of-custody to to Cal Tech Environmental Laboratories, Inc Advanced GeoEnvironmental,Inc