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i <br /> 01 November 2005 <br /> AGE-NC Project No 02-0950 <br /> IPage 3 of 9 <br /> Iprofiles are Included in Appendix B <br /> 22 CPT LITHOLOGIC INVESTIGATION <br /> On 20 July 2005,one paired soil boring(CPT-1)was advanced on-site for cone penetrometer testing <br /> At the boring location, lithologic data was collected from an initial CPT sounding utilizing a <br /> piezocone (cone penetrometer with pore pressure measurement) tip, an immediately adjacent twin <br /> boring was then advanced to collect soil and grab ground water samples from selected depths <br /> 2 2 1 Advancement of CPT Bonngs <br /> IThe CPT investigation utilized a 25-ton,truck-mounted CPT drill rig equipped with 2-inch diameter <br /> hollow-stem rods A hydraulic ram was utilized to advance a piezoeone attached to the hollow-stem <br /> I rod assembly to the total depths of the borings, a piezocone illustration is provided in Appendix C <br /> Soil boring CPT-I was advanced to a total depth of 97 feet bsg near the former UST location, <br /> approximately 25 feet northeast of monitoring well MW-2 <br /> IAt the sounding location, the soil parameters of piezocone tip resistance, sleeve friction, and pore <br /> water pressure were continuously measured as the piezocone was advanced to depth Utilizing the <br /> Isoil parameters, a computer program interpreted general lithology types based on the CPT Soil <br /> Behavior Classification System (Robertson, P K , Campanella, R G, Gillespie, D , and Greig, J , <br /> I 1986) and displayed the interpreted lithologies on a continuous CPT boring log The CPT <br /> interpretive log is provided in Appendix C <br /> Rinseate generated during drilling activities was containerized in properly labeled, Department of <br /> Transportation(DOT)-approved 55-gallon drums The CPT sounding was backfilled over its entire <br /> depth with a portland cement grout mix <br /> 2 2 2 Grab Ground Water Sample Collection and Analysis <br /> Grab ground water samples were collected in a twin boring advanced immediately adjacent to the <br /> initial CPT sounding The samples were collected utilizing a 25-ton truck-mounted CPT drill rig <br /> I equipped with 1 75-inch diameter hollow-stem rods fitted with a HydroPunch groundwater sampling <br /> assembly,which was pushed to specified sampling depths in the boring, a diagram of the sampling <br /> assembly are illustrated in Appendix C <br /> IGround water samples were collected from specified depth intervals(zones)based on CPT lithologic <br /> Advanced GeoEnvironmental,Inc <br /> I <br />