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I 25 March 2002 AGE-NC Project No 97-0326 ' Page 2 of 9 ' measured as the cone penetrometer was advanced to depth A continuous bonng log was generated utilizing the Gregg In-Situ System CPT computer program The Gregg In-Situ System computer program utili7ed the SBT Soil Behavior Type(Robertson, 1990),to generate a general lithology type ' and display on a CPT boring log(See Appendix A) Rinseate generated during drilling activities was containerized in properly labeled DOT-approved 55-gallon drums and removed by the drilling company for proper disposal All soil bonngs were backfilled over their entire depth with a portland ' cement gout mix ' 22 CPT DRILLING AND GROUND WATER/SOIL COLLECTION PROCEDURES Grab ground water and soil samples were collected with the 25-ton truck-mounted CPT drill rig ' equipped with 1 75-inch diameter hollow-stem rods fitted with a HydroPunch ground water or a soil sampling tool which was pushed to a specified sampling depth in each soil boring Samples were ' collected in a twinned boring advanced immediately adjacent to the initial CPT boring in each area 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favorable conditions for sampling For ground water, a HydroPunch sampling tool was pushed into the specified zone, then withdrawn approximately four feet to expose an inlet screen, the interior of the sampling tool filled with water and a 1-inch outer ' diameter(O D ) stainless steel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a ground water sample For soil, a steel-tipped soil sampler was pushed into the specified zone, then the tip was withdrawn to expose a core barrel, the soil sampler was pushed down again to retneve a 1-foot soil sample ' All nnseatc generated from drilling activities was containerized in properly labeled DOT-approved 55-gallon drums, and was stored on-site in an area lacking public access All soil borings were ' backfilled over their entire depth with a portland cement grout mix Following collection, the samples were properly labeled, placed in laboratory-supplied containers ' and transported under chain-of-custody to McCampbell Analytical Inc (MAI), a California Department of Health ,Services (DHS)-certified laboratory Samples were analyzed for • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Methods 5030 and 8015 Modified ' • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and methyl tertiary-butyl ether (MTBE) in accordance with EPA Method 8020 I Advanced GeoEnvironmentai,Inc