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I 31 July 2000 AGE-NC Project No 950130 ' Page 3 of 9 ' water sample Ground water samples were collected from each depth interval (zone) based on previously acquired CPT-lithology data indicating favorable conditions for sampling ground water All rinseate generated during 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 sample collection, the samples were placed in laboratory-supplied containers and transported under chain-of-custody to a California Department of Health Services (DHS)-certified laboratory Each sample was analyzed for TPH-g, BTEX, MTBE, volatile organics, 1,2-DCA, and ' EDB in accordance with EPA Methods 8015 Modified and 8260 Modified ' 24 CPT DRILLING AND SOIL SAMPLE COLLECTION Soil samples were collected from soil borings CPT-lA, CPT-2A and CPT-3 utilizing the 25-ton Itruck-mounted CPT drill rig equipped with 2-inch diameter probe rods with an attached 2 15-inch diameter soil sampler, using "direct push"technology(See Figure 2) Soil samples were collected using a CPT soil sampling assembly loaded with four pre-cleaned 125- inch by 6-inch brass sleeves Soil samples were preserved by covering both ends of the brass sleeve with Teflon sheets, capping, and sealing with tape Each sample sleeve was labeled with soil boring location, depth, time, date and sampler's initials Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and transported to a DHS-certified laboratory under chain of custody, selected samples were analyzed for TPH-g, BTEX, MTBE,volatile organics, 1,2-DCA, and EDB in accordance with EPA Methods 8015 Modified and 8260 Modified 25 LABORATORY RESULTS OF "GRAB" GROUND WATER SAMPLES A total of eight"grab"ground water samples were collected from CPT-IA, CPT-2A and CPT-3 and submitted for laboratory analysis for the above mentioned constituents TPH-g was detected in water samples collected from CPT-lA at depths of 89 to 92 feet bsg and 102 Ito 105 feet bsg at concentrations as high as 4,800 micrograms per liter(yg/l), from CPT-2A at depths of 84 to 87 feet bsg and 101 to 104 feet bsg at concentrations as high as 1,800 4g/1 and from CPT-3 at depths of 64 to 67 feet bsg at a concentration of 180µg/1 Various BTEX compounds were detected in water samples collected from CPT-IA at depths of 75 Advanced GeoEnviron mental,Inc