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ii 05 December 2008 AGE-NC Project No. 04-1153 Page 2 of 5 of the second or other selected sleeve were covered with Teflon sheets,capped,and sealed with tape. Samples were labeled, stored on ice, and transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL) a State of California Department of Public Health (CDPH)- certified analytical laboratory. Selected samples were analyzed for: • Total petroleum hydrocarbons as gasoline (TPH-g), as diesel (TPH-d), and as oil (TPH-o) in accordance with EPA Method 8015 Modified; and • Benzene, toluene, ethylbenzene and total xylenes (BTEX), and fuel additives methyl-tert- butyi ether(MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), 1,2-dibromoethane (EDB), and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260B. All sampling equipment was washed in an Alconox solution and rinsed twice with water prior to each sampling run.All rinseate generated by drilling-related activities was containerized in properly labeled department of transportation (DOT)-approved 55-gallon drams, was taken off-site, and stored until it could be properly disposed. All soil borings were backfilled over their entire depth with either a Portland cement grout mix or a Portland cement slurry. 2.3. SOIL LOGGING After sample preservation, soil was extruded from!the remaining sleeves. Soils were visually classified by an AGE geologist in accordance with the Unified Soil Classification system. Additionally, soils were screened for the presence of.volatile organic compounds using an organic vapor analyzer(OVA) equipped with a photo-ionization detector(PID)calibrated to an appropriate isobutylene standard. Boring logs exhibiting soil profiles are depicted in Appendix C. 2.4. GRAB GROUND WATER COLLECTION AND ANALYSIS After completing the boring,the ground water table was measured and observed to be approximately 45 feet bsg. One `grab' ground water sample was collected from boring B2. Ground water was extracted by hand bailing the boring with disposable '/4-inch tubing and sampling check valve. The ground water sample was transferred into three laboratory-supplied,40-m1 volatile organic analysis (VOA) vials, and one laboratory-supplied 1-liter amber bottle. After collection, the sample was properly labeled, placed in a chilled container, and transported under chain-of-custody to CTEL. Samples were analyzed for the constituents listed in Section 2.2. Advanced GeoEnvironmental,Inc.