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07 May 2008 AGE-NC Project No. 08-3237 Page 2 of 3 SCOPE OF WORK AGE proposes to advance a total of three soil borings (B-1 through B-3) on site to total depths of between 35 and 50 feet below surface grade(bsg),for the collection of grab ground water and/or soil samples. Soil borings will be advanced in the former gasoline station area of the property located near the northwest corner of the site(Figure 2).The soil borings will be advanced in the areas which appear to have been occupied by dispenser canopy and possible UST locations. Additional soil borings may be required if significant hydrocarbon contamination is detected in the field. Probe borings will be advanced using a van-mounted Geoprobe 5400 direct-push probing unit equipped with 1.25-inch probing rods.The Geoprobe advances soil probe borings using a hydraulic hammer to drive soil sampling tools to specified depths. Soil boring will be sampled at discreet five-foot intervals using a 1.125-inch Geoprobe soil sampling assembly loaded with four six-inch brass sleeves. Upon sample retrieval, the ends of the second sleeve will be covered with Teflon sheets, capped and sealed with tape. Soils encountered in the borings will be visually classified by an AGE scientist/geologist in accordance with the Unified Soil Classification System(USCS).Additionally, soil samples will be field-screened for the presence of volatile organic compounds using an organic vapor meter(OVM), equipped with photo-ionization detector(PID). Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water after being washed with a solution of Alconox. All probing rods will be cleaned prior to advancement at each probe boring location. For the collection of grab ground water samples, soil probe borings will be advanced to the top of the ground water table as identified by collection of a saturated soil sample. Once ground water has been encountered,a Geoprobe push-driven water sampling device will be advanced two to three feet into the water-bearing zone. Grab ground water sample will be collected using a Geoprobe water sampling assembly fitted with a pre-cleaned,one-inch diameter 0.01-slotted temporary well screen. The ground water sample will be extracted by lowering a polyethylene bailer through the hollow center of the push rods into the screen section. Appropriately sealed and labeled soil and ground water samples will be placed in chilled containers under ice and transported under chain-of-custody procedure to a CDPH-certified laboratory. Each sample container will be labeled with the boring designation, time, date and sampler's initials. Selected samples will be analyzed by a State of California Department of Public Health (CDPH)- certified laboratory for the following constituents: Advanced GeoEnvironmental,Inc.