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• 22 May 2001 AGE-NC Project No 95-0167 Page 4 of 10 N' 27 PROBE BORING ADVANCEMENT AND SAMPLN� G On 14 November 2000, three soil probe borings (1`9 through PI 1) were advanced at the site, under observation by the PHS-EHD Probe borings were advanced in the area of the former USTs and in the areas north and east of the former UST dispenser The soil borings were advanced at the site using a Geoprobe 5400 probing unit equipped with 1 25-inch diameter probe rods with a 2 15-inch K, diameter soil sampling assembly Probe boring locations are shown on Figure 2 Boring P9 was advanced to a depth of 35 feet below surface grade (bsg), boring P10 was advanced to a depth of 40 feet bsg and boring P 11 was advanced for collection of a grab ground water sample to 20 feet bsg Soil samples were collected at 5-foot intervals, beginning at a depth of 10 feet bsg ' After collection, the ends of the second leading brass sleeve were covered with aluminum sheets, capped and sealed with tape The sleeves were labeled and placed in a chilled container ' Following collection of soil samples from boring P10, a water sampling assembly equipped with a four-foot, slotted PVC screen was advanced to a depth of 50 feet and a grab water sample was then collected For the collection of grab ground water samples from probe borings P9 and PI I a 10-foot, slotted PVC screen was placed into the boring A modified Teflon tube bailer was used to collected samples A new Teflon tubing section, with a base check valve was lowered into the well screen A sample was then drawn to the surface Each grab water sample was transferred into 40-m1 EPA- approved volatile organic analysis(VOA)vials containing 0 5 ml 18%hydrochloric acid as a sample preservative All probing rods, sampling tools and brass sample liners used for sample collection were thoroughly ' rinsed with clean water after washing with a solution of Alconox prior to each sampling run Selected soil samples and each grab water sample were transported under chain-of-custody, to a California Department of Health Services (DHS)-certified analytical laboratory The samples were ' analyzed for • TPH-g in accordance with EPA Method 8015 Modified and • BTEX in accordance with EPA Method 8020 ' Ground water samples were also analyzed for 1 - • Oxygenated fuel additive compounds - di-isopropyl ether (DIPE), ethyl tertiary-butyl ether ' (ETBE),MTBE, tertiary-amyl methyl ether(TAME) and tertiary butanol (TBA), methanol, • ethanol, ethylene dibromide (EDS) and 1,2-dichloroethane (1,2-DCA) in accordance with 8260, respectively Advanced GLoEnvironmental,Inc