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`av rr� 27 January 2006 AGE-NC Project No. 02-0913 Page 2 of 5 rl 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS Soil samples were collected ahead of the drill bit using a California modified split-spoon sampler loaded with three pre-cleaned 2-inch by 6-inch brass sleeves. The samples were collected from the pilot borings at 5-foot intervals,beginning at 10 feet bsg,using a 140-pound hammer to advance the sampler. The number of blows required to advance the sampler over each 6-inch increment of the 18-inch sampling interval was recorded on the boring logs. Soils encountered in the borings were .r visually classified by an AGE personnel in accordance with the Unified Soil Classification System (USCS). Additionally, soil samples were field-screened for the presence of volatile organic compounds using an organic vapor meter(OVM). After sample recovery,both ends of the second sleeve were covered with Teflon sheets,capped,and sealed with tape. The sample sleeves were labeled, stored on ice, and transported under chain-of- custody to Cal Tech Environmental Laboratories(CTEL),a State of California Department of Health Services (DHS)-certified analytical laboratory. Soil samples were selected for analyzation based upon discussions with EHD. Selected soil samples were analyzed for: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015 Modified; V • Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and methyl tertiary-butyl ether (MTBE) in accordance with EPA Method 826013; • The fuel additives di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE),tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), 1,2-dichloroethane (1,2-DCA), and 1,2-dibromoethane (EDB)by EPA Method 8260B. All augers used were cleaned prior to advancement in each boring location.The sampling equipment was washed in an Alconox solution and triple rinsed with water prior to each sampling run to avoid cross-contamination. 3.3.. GROUND WATER SAMPLING PROCEDURES `r Ground water samples were collected from the soil borings B 1 and B2 at the first occurrence of ground water near 77 feet and 83 feet bsg, respectively, while a sample was collected from the domestic well located at the southern edge of the site. Ground water samples were collected using a polyvinyl-chloride (PVC) disposable bailer and transferred into laboratory-supplied 40-milliliter (ml) volatile organic analysis (VOA) vials containing 0.5 ml hydrochloric acid solution as preservative. The domestic well sample was collected after purging the holding tank empty and �+ Advanced GeoEnvironmental,Inc.