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CP0057 Sites - 2 - 10 July 2012] , <br /> 440-441-508 W. Charter Wy. <br /> 1444 S. Lincoln St. <br /> Stockton, San Joaquin County <br /> second rebound test will be completed. After a second rebound test is completed, and if <br /> rebound occurs a second time, then SVE/AS will not be restarted as this method has reached <br /> its usefulness for remediation. Upon completion of remediation at the Chevron site, the <br /> moveable components of the SVE/AS system may be installed to the east across Lincoln St. at <br /> the Sarah Lee site (Columbo/Toscana Bakery) for continuation of corrective action. <br /> The CAP is approved for Chevron's SVE/AS installation and startup. Note that prior to <br /> restarting of SVE/AS and after a rebound test indicates significant increases in petroleum <br /> hydrocarbons concentrations, a technical evaluation is necessary and appropriate to determine <br /> whether SVE/AS can be adequately optimized based on the current well configuration, whether <br /> additional SVE/AS wells are required to optimize treatment due to changes in the site <br /> conceptual model, and whether additional technologies (i.e., in-situ chemical oxidation, etc.) <br /> could achieve maximum source removal in a cost effective manner, to reach closure in a more <br /> timely manner. <br /> Please continue to expedite the CAP implementation to reach closure as expeditiously as <br /> possible. The ten months to Chevron's SVE/AS startup is excessive, an example is the <br /> scheduled 125 days for State Water Resources Control Board UST Cleanup Fund (Fund) pre- <br /> approval and approval of costs, and not due to technical issues or permitting delays. Thirty <br /> days is more reasonable for both Fund pre-approval and approval. Therefore, notification of <br /> Chevron's SVE/AS system startup is due 30 January 2013. <br /> Also note that we are continuing to work on a draft Cleanup and Abatement Order (CAO), which <br /> will include enforceable due dates for all four sites in CP0057, and the above 30 January 2013 <br /> deadline. The draft CAO will be submitted to you for your comments prior to issuance. <br /> If you have any questions concerning this letter or want to schedule a meeting with Regional <br /> Board staff, you may contact me at (916) 464-4615 or I can be reached by e-mail at <br /> jbarton a(�,waterboards.ca.gov. <br /> aures L.L. Barton, P.G. <br /> Engineering Geologist <br /> cc: See CP0057 Distribution List <br />