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' 05 October 2007 AGE-NC Project No.07-1537 ' Page 2 of 8 ' 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 provided in Appendix C. The CPT-sounding borehole was backfilled from total depth to surface grade by inserting hollow rods to total depth of the boring and backfilling with a portland type II cement grout mix. 2.1.2. Grab Ground Water and Soil Sample Collection and Analysis ' Grab ground water and soil samples were collected from separate soil borings advanced immediately adjacent to the CPT boring.The samples were collected utilizing the 25-ton truck-mounted CPT drill ' rig equipped with 1.75-inch diameter hollow-stem rods. The rod assembly was fitted with either a steel-tipped, HydroPunch ground water sampler or piston soil sampler; diagrams of the sampling assemblies are illustrated in Appendix C. Ground water and soil samples were collected from ' specified depth intervals (zones) based on CPT lithologic data acquired from the initial CPT sounding indicating favorable conditions for sampling. ' Discreet ground water samples were collected from four separate borings adjacent to the CPT-1 boring location at the following depths: 62, 70, 90, and 99.5 feet bsg. Ground water samples were ' collected by advancing the HydroPunch sampling assembly to the specified depths,then withdrawing approximately 3 to 4 feet to expose an inlet screen;the interior of the sampling tool filled with water and a 1-inch outer diameter stainless steel bailer was lowered and utilized to extract a ground water ' sample. Each ground water sample was transferred into four laboratory-supplied 40-milliliter(ml) volatile organic analysis (VOA) vials without preservative. ' Discreet soil samples were collected from another separate boring adjacent to the CPT-1 boring at depths of 14,66,79,89,and 97 feet bsg.The steel-tipped,piston soil sampling assembly was pushed into the zone,then the tip was withdrawn to expose a core barrel;the soil sampler was pushed down ' again to retrieve a 1-foot soil sample. Upon soil sample retrieval,a brass sleeve was removed from the sampler.The ends of the brass sleeve were immediately covered with Teflon sheets, sealed with plastic end caps, and secured with tape. ' Following collection, the grab ground water and soil samples were properly labeled, placed in a chilled container and transported under chain of custody procedures to Cal Tech Environmental Laboratories(CTEL),a State of California Department of Health Services(DHS)-certified analytical laboratory in Paramount, California, for analysis. The samples were analyzed for: ' Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015M; and Advanced GeoEvironmental Inc.