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06 February 2013 <br /> AGE Project No. 12-2466 <br /> Page 2 of 3 <br /> SCOPE OF WORK <br /> Following pre-fieldwork activities (including performance of a geophysical survey, and <br /> marking boring locations and notification of Underground Service Alert), a total of 11 soil <br /> borings will be advanced for collection of soil samples at the site. Three (3)soil borings will <br /> be advanced to depths of 20 feet below surface grade (bsg) in the vicinity of the USTs <br /> (situated side-by-side). Six (6) soil borings will be advanced to total depths of 10 feet bsg <br /> near each dispenser. Two (2)soil borings will be advanced to total depths of approximately <br /> 20 feet bsg (10 feet below the bottom of the clarifier) in the vicinity of the clarifier. <br /> Approximate boring locations are illustrated in Figure 2. <br /> PROBE BORING ADVANCEMENT <br /> Probe borings will be advanced using a using a GeoProbe®or PowerProbe® direct-push <br /> unit equipped with 1.25-inch probing rods. The probe unit advances soil borings using a <br /> hydraulic hammer to drive soil sampling tools to specified depths. <br /> SOIL SAMPLE COLLECTION AND ANALYSIS <br /> Soil samples may will be collected at discreet five-foot intervals using a 1.25-inch <br /> Geoprobe®soil sampling assembly loaded with four six-inch stainless steel sleeves or one <br /> 4-foot acetate liner. Upon sample retrieval, the ends of the second sleeve or portions of the <br /> acetate liner will be covered with Teflon® sheets, capped and sealed with tape. <br /> Appropriately sealed and labeled samples will be placed in a chilled container under ice <br /> and transported under chain-of-custody procedure to a California Department of Public <br /> Health (CDPH)-Certified laboratory. Selected soil samples collected from the vicinity of the <br /> UST system (9 borings)will be analyzed for: total petroleum hydrocarbons (TPH)-full scan <br /> and volatile organic compounds (VOCs) with fuel oxygenates in accordance with EPA <br /> method 8015m and 826013, respectively. Selected soil samples collected from the vicinity <br /> of the clarifier will be analyzed for: TPH-full scan in accordance with EPA method 8015m. <br /> EQUIPMENT DECONTAMINATION <br /> Prior to use, all sampling tools used for sample collection will be thoroughly rinsed with <br /> clean water after being washed with a solution of Alconox. All probing rods will be cleaned <br /> prior to advancement at each probe boring location. <br /> Advanced GeoEnvironmental,Inc. <br />