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I <br />' 07 September 2005 <br /> • AGE-NC Project No 98-0540 <br />' Page 2 of 9 <br />' At the sounding location, the soil parameters of piezocone tip resistance, sleeve friction, and pore <br /> water pressure were continuously measured as the plezocone was advanced to depth Utilizing the <br /> soil 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 /> 1986) and displayed the interpreted lithologies on a continuous CPT boring Iog The CPT <br /> Interpretive log Is provided in Appendix B <br />' Rinseate generated during drilling activities was containerized in properly labeled, Department of <br /> Transportation(DOT)-approved 55-gallon drums and stored on-site in an area lacking public access <br />' The CPT soil boring was backfilled over its entire depth with a portland cement grout mix <br />' 2 12 Grab Ground Water Sample Collection and Analysis <br /> Grab ground water samples were collected in a twin soil boring advanced immediately adjacent to <br />' the initial CPT sounding The samples were collected utilizing a 25-ton truck-mounted CPT drill rig <br /> equipped with 1 75-inch diameter hollow-stem rods fitted with a HydroPunch ground water sampling <br /> assembly, which was pushed to specified sampling depths in the boring, a diagram of sampling <br />'0 assembly is Illustrated in Appendix B <br />' Ground water samples were collected from specified depth intervals(zones)based on CPT lithologic <br /> data acquired from the initial CPT sounding indicating favorable conditions for sampling Ground <br /> water samples were collected using the HydroPunch sampling assembly pushed to specified zones, <br /> then withdrawn approximately 4 feet to expose an inlet screen,the interior of the sampling tool filled <br /> with water and a 1-inch outer diameter stainless steel bailer was lowered and utilized to extract a <br /> ground water sample <br /> Ground water samples were collected from the CPT boring location at the following intervals <br /> • Between 117 feet and 120 feet bsg, <br /> • Between 129 feet and 132 feet bsg, and <br /> I6 Between 135 feet and 138 feet bsg <br /> Following collection, the samples were transferred into laboratory-supplied, 40-milliliter (ml) <br /> volatile organic analysis(VOA)vials containing 0 5 ml 18%hydrochloric acid solution as a sample <br /> preservative The samples were properly labeled,placed in a chilled container,and transported under <br /> I chain of custody to Cal Tech Environmental Laboratories(CTEL),a California Department of Health <br /> Services (DHS)-certified analytical laboratory, for analysis All samples were analyzed for the <br /> • following constituents <br /> Advanced GeoEnvironmcata4 Inc <br />