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i T 06 October 1997 AGE-NC Project No. 96-0264 Page 3 of 5 advanced to depths of 5 and 7.5 feet bsg, respectively. Locations of the soil probe borings are illustrated on Figure 2. Probe borings 1, 2, 3, 4, 7 and 8 were sampled at five-foot intervals beginning at 5 feet bsg, using a Geoprobe soil sampling device loaded with four 6-inch by 1.125-inch brass sleeves. Probe boring 5 was sampled only at a depth of five 5 feet bsg,while boring 6 was sampled at depths of 5 and 7.5 feet bsg. Selected soil-filled sleeves were preserved by covering with Teflon sheets, capping and sealing with tape. All samples were labeled. Collected samples preserved for laboratory analysis were placed in a chilled container, under ice, and transported to MAI under chain-of-custody. The sampling equipment was washed in an Alconox solution and rinsed with water prior to each sampling run to prevent cross-contamination. 3.3. SOIL LOGGING After preservation of the Geoprobe boring samples, soil was extruded from the remaining sleeves and was screened for organic vapor utilizing an organic vapor meter equipped with a photo- ionization detector(PID: Thermo Environmental 580A, 10.0 eV,calibrated to isobutylene). The PID readings were recorded on the Boring Logs. 3.4. LABORATORY ANALYSIS OF SOIL Surface soil samples were analyzed in accordance with EPA Method 418.1 for total recoverable petroleum hydrocarbons. Selected soil samples collected from the borings were analyzed in accordance with EPA Method 5030/8015-M for total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH- d),in accordance with EPA Method 8020 for volatile aromatics(benzene,toluene,ethyl benzene and xylenes: BTE&X) and volatile halocarbons (chlorinated hydrocarbons) in accordance with EPA method 8010. At the request of the PHS-EHD, soil sample B3-5 was analyzed for oxygenated fuel additives: methyl tertiary butyl ether(MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether(DIPE), ethyl tertiary butyl ether(ETBE)and tertiary amyl methyl ether(TAME)in accordance with EPA methods 8260/8240.