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Well Abandonment and Soil and Groundwater Investigation Work Plan US Can-Welty Road September 2007 Collection of Fuel-Fingerprint Samples In order to assess whether media were affected by SJV crude or another petroleum product,a fuel- fingerprint sample should be collected from all borings evincing high concentrations of TPH and submitted to CETC for fingerprinting. If no affected soil or groundwater is found,then no fuel- fingerprint samples will be collected. Fuel-fingerprint samples will be analyzed using GC/MS. Soil Boring Abandonment Soil borings will be sealed and abandoned in accordance with SJCEHD requirements. Following abandonment, each soil boring will be located using a Global Positioning System unit. Boring locations will be surveyed for longitude and latitude coordinates with reference to the North American Datum 83 State Plane Zone 3 U.S. These data will be used to place the borings on a geo-referenced base map. 3.4 QUALITY ASSURANCE/QUALITY CONTROL AND DATA USABILITY Field sampling will be conducted in accordance with SAIC's Quality Assurance and Quality Control Sample Collection, Handling, and Analysis procedures(SAIC,2007a). In accordance with those procedures,quality assurance samples will be collected and analyzed according to the specifications listed in Table 3. Requests for trip blank,equipment rinsate blank,duplicate,and matrix spike/matrix spike duplicate analyses will be specified on the chain-of-custody form. After receipt of all final laboratory reports, SAIC will perform a data usability evaluation to determine whether the data can be used for their intended purposes. The evaluation will be summarized in the Data Usability Summary of the subsequent Soil and Groundwater Investigation Report(SGIR). 3.5 INVESTIGATION-DERIVED WASTE(IDW) IDW—soil cuttings and unused soil sample,disposable sampling equipment,used personal protective equipment,and decontamination water—will be placed in U.S.Department of Transportation-rated, 55-gallon drums that will be properly labeled, secured,and stored pending disposal by Sturgeon&Son, Inc.,a direct-bill CEMC contractor. Existing soil and groundwater profiles from previous investigation results may be used to characterize the IDW. If needed,composite IDW samples will be collected and submitted to Lancaster for analysis so that the IDW can be profiled for landfill disposal. IDW will be segregated,sampled,analyzed,and disposed of consistent with Chevron's Operational Excellence Process document entitled HPP-BTR Waste Management Process(Chevron,2006). 4. REPORTING AND SCHEDULE SAIC will evaluate project data to determine the extent of affected soil and groundwater and prepare a SGIR that documents the project results. The SGIR will contain the elements identified in,and project data will be evaluated in accordance with,the draft document entitled Guidelines for Soil and Groundwater Investigation Reports(SAIC,2007b). The report will present conclusions and recommendations to facilitate any future additional investigation,risk assessment,and/or remedial options required to attain No Further Action Required status. SAIC anticipates beginning the investigation within 45 days following RWQCB acceptance of this work plan and procurement of all necessary permits,bonds,and access agreements. The SGIR will be submitted to the RWQCB no later than 90 days after receipt of all final laboratory reports. & REFERENCES Chevron,2006. HPP-BTR Waste Management Process. January. DWR,2003. California's Groundwater,Bulletin 118,2003 Update. EPA,2004. Region 9 PRGs Table.ht!p://www.epa.gov/reizion9/waste/sfund/prp-/index.htmlr table. October. 10 From Science 10 Solutions