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r r 12 July 2005 AGE-NC Project No. 05-1263 Page 3 of 5 • Boring P-6 was advanced to a total depth of 15 feet bsg near the northeast corner of the northern parcel (400 North Sacramento Street), approximately 110 feet east of the North Sacramento Street right-of-way. (Figure 2) 3.2. SOIL SAMPLE COLLECTION AND ANALYSIS — Samples were collected from all six borings at discreet 5-foot intervals from 5 feet bsg to the total depth of the borings using a 1.25-inch 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 to minimize the chance of cross-contamination. For each soil sample collected,both ends of a middle sleeve were covered with Teflon sheets, capped, and sealed with tape. The samples were then 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. A total of six selected samples were analyzed for: .. • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, respectively) in accordance with EPA Method 8015 Modified; • Benzene,toluene,ethylbenzene,and total xylenes(BTEX)and fuel additives methyl tertiary- butyl ether (MTBE), di-isopropyl ether (DIPE), tertiary-amyl methyl ether (TAME), ethyl tertiary-butyl ether(ETBE),tertiary-butyl alcohol(TBA), 1,2-dichloroethane(1,2-DCA),and 1,2-dibromoethane (EDB) in accordance with EPA Method 826013; and • Organochlorine pesticides in accordance with EPA Method 8081 A. 3.3. SOIL LOGGING After sample preservation,soil was extruded from the remaining sleeves and field-screened 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 (USCS). Soil boring logs exhibiting soil — profiles are included in Appendix A. 4.0. FINDINGS The stratigraphy and ground water hydrogeology underlying the site were characterized from field descriptions. Hydrocarbon impact to soil and ground water was assessed by laboratory analysis. Advanced GeoEvironmental,Inc.