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YA�� ATC Associates Inc. <br /> 1117 Lone Palm Avenue,Suite 201 <br /> Modesto,California 95351 <br /> 209-579-2221 <br /> • s s o c n r e s i N c. Fax:209-579-2225 <br /> ATC will schedule field personnel and equipment, conduct a site walk and mark the surface of <br /> the site for Underground Services Alert (USA) at least 48 hours prior to advancing any soil <br /> borings to allow time for utility companies to identify underground lines, pipes, or cables that <br /> may be affected by the drilling activities, as required. ATC also will notify the SJCEHD at least <br /> 48 hours prior to beginning any Feld activities. <br /> Task 2: Boring Advancement and Completion <br /> To evaluate the presence of petroleum hydrocarbon impact to soil and groundwater, three <br /> angled Geoprobe® borings will be advanced to first encountered groundwater, estimated to be <br /> at 15 feet below ground surface (bgs). The locations of the borings are illustrated on the Site <br /> Map (Figure 2). <br /> This task includes mobilization to the site and advancing three angled soil borings in the general <br /> vicinity of the fuel dispensers on site. The borings will be advanced using a truck-mounted, <br /> narrow-diameter, direct-push drilling rig at an angle approximately 30 degrees from vertical. <br /> The drilling will be conducted by a State-licensed (C57) drilling company. Soil samples will be <br /> collected continuously. A field geologist will be present to log descriptions of soil types <br /> encountered and record available information and observations on boring logs. Soil samples will <br /> be field screened with a Photo Ionization Detector (PID) or similar instrument. This information <br /> along with field observations (i.e. odor and soil discoloration) will be used to select which <br /> samples will be submitted for laboratory analyses. Sample collection information will also be <br /> recorded on the boring logs. <br /> ATC anticipates collecting one soil sample from each of the soil borings. A groundwater sample <br /> will be collected from each boring at first encountered groundwater, anticipated to be <br /> approximately 12-15 feet bgs. Following soil and groundwater sample collection, the borings will <br /> be backfilled with neat cement grout to the ground surface. Drill cuttings, if any, will be stored <br /> on-site in 55-gallon containers pending laboratory results after which disposal arrangements will <br /> be made. <br /> Task 3: Laboratory Analysis <br /> Three soil and three groundwater samples collected from the proposed soil borings will be <br /> submitted under chain-of-custody procedures to a State-certified laboratory. The soil samples <br /> will be analyzed for total petroleum hydrocarbons quantified as diesel (TPHd) by EPA Method <br /> 8015M. The groundwater samples will be analyzed for TPHd by EPA Method 8015M, for <br /> benzene, toluene, ethyl benzene, total xylenes (BTEX), MTBE, ethyl tertiary butyl ether (ETBE), <br /> di-isopropyl ether (DIPE), tertiary amyl ether (TAME), tertiary butyl alcohol (TBA), 1,2- <br /> dichloroethane (1,2-DCA), and EDB utilizing EPA Method 82608. <br /> Task 4: Disposal of Investigative Derived Wastes <br /> As stated above, any drill cuttings generated will be stored on site in a 55-gallon drum pending <br /> laboratory results. The soil analytical results will be used to profile the soil cuttings for disposal. <br /> Soil cuttings will be managed in accordance with State of California and SJCEHD guidelines <br /> which will include waste profile characterization and disposition at a State permitted landfill or <br /> hazardous waste Transfer, Storage, or Disposal (TSDF) facility. This cost estimate assumes <br /> that one drum (or less) of non-hazardous waste will be generated. <br /> Page 2 <br />