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26 April 2011 AGE-NC Project No. 03-1100 Page 2 of 6 stainless steel sleeves. A 140-pound hammer was used to advance the sampler and the number of blows required to drive each 6-inch length of the sampler (blow counts) was recorded on the boring log by an AGE staff member. Boring logs documenting drilling observations are presented in Appendix D. After sample recovery, both ends of a selected sleeve were covered with Teflon®sheets, capped, and sealed with tape. Sample sleeves were properly labeled with the sample identification, date, time, location and sampler's initials. Soil samples were stored on ice in an ice chest and transported under chain-of-custody procedures to Cal Tech Environmental Laboratories (CTEL), a State of California Department of Public Health (CDPH)-certified analytical laboratory located in Paramount, California. Soil samples collected from borings OW1, OW2, OW4, and OW5 were analyzed for the following: • Total Petroleum Hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015 Modified, • Volatile aromatic hydrocarbons benzene, toluene, ethyl-benzene and total xylenes (BTEX) compounds in accordance with EPA Method 8260; and • 1,2-Dichloroethane (1,2-DCA) in accordance with EPA Method 8260. Sampling tools used for sample collection were thoroughly washed with a solution of Alconox, and then rinsed with clean tap water prior to each sampling sequence. Following drilling activities, rinseate generated from decontaminating the equipment was placed in properly labeled DOT-approved 55-gallon drums and were covered, sealed, labeled and stored on-site pending proper disposal. 2.2. LOGGING During drilling activities, soil sample duplicates and drill cuttings were visually described on boring logs in accordance with the Unified Soil Classification System (USCS). Soil samples were not monitored for the presence of organic vapor. Boring logs documenting geologic observations from borings OW1 thorough OW10, which includes the final completion details of the wells, have been included in Appendix D. 2.3. WELL COMPLETION The pilot borings for wells OW1 through OW1 0 were completed as ozone injection points utilizing 1-inch diameter, schedule 40 polyvinylchloride(PVC)blank well casing and 1-inch diameter, 50-micron sparge point diffuser installed from 13 to15 feet bsg in borings OW1 Advanced GcoEnAm,rnental,Inc.