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10 January 2005 AGE-NC Project No. 04-1224 Page 3 of 6 3.1. DRILLING On 18 November 2004,four soil probe borings(B-1 through B-4)were advanced at the site to collect soil and`grab' ground water samples as part of the assessment activities. Each boring was advanced to 15 feet bsg using "direct push"technology, utilizing a truck-mounted Geoprobe 5400 equipped with a 1.5-inch diameter soil sampler attached to 1.25-inch diameter probe rods. Boring B-1 was advanced approximately 45 feet east of the northeast corner of the building;boring B-2 was advanced just west of the assumed location of the former UST; boring B-3 was advanced just east of the assumed location of the former UST; and boring B-4 was advanced approximately 10 feet southwest of the northwest corner of the building (Figure 2). 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS Soil samples were collected from the borings at discreet 5-foot intervals using a 1.125" Geoprobe soil sampling assembly loaded with four 6-inch brass sleeves.All sampling equipment was washed in an Alconox solution and rinsed twice with water prior to each sampling run. For each soil sample collected, both ends of the second or other selected sleeve were covered with Teflon sheets, capped and sealed with tape. The samples were properly 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. Selected samples were analyzed for the following constituents: • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015M; and • Benzene,toluene,ethylbenzene and total xylenes(BTEX)and the fuel additives di-isopropyl ether(DIPE),ethyl tertiary-butyl ether(ETBE),methyl tertiary-butyl ether(MTBE),tertiary- amyl methyl ether (TAME), tertiary-butyl alcohol (TBA), 1,2-dibromoethane (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260B. 3.3. SOIL LOGGING After sample preservation, soil was extruded from the remaining sleeves and field-screened for organic vapors utilizing an organic vapor analyzer(OVA)equipped with a photo-ionization detector (PID:Thermo Environmental 580B, 10.0 eV,calibrated to isobutylene).The soil was also described visually in accordance with the Unified Soil Classification System. Soil boring logs exhibiting soil Advanced GeoEnvironmental,Inc.