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' CENTRAL VALLEY REGIONAL WATER QUALITY CONTROL BOARD <br /> STAFF <br /> RECOMMENDATIONS <br /> FOR <br /> CLOSURE REQUESTS <br /> 1 <br /> The Central Valley Underground Tank Program (Program) is implemented to <br />' achieve the goals of State policies, regulations, and procedures adopted by the State <br /> Water Resources Control Hoard and the Regional Board's Basin Plans To provide <br /> consistency in the Program, the Trr-Regronal Board Staff Recomrnenaations for <br />' Prelimmariy Investigation and Evaluation of Underground Tank Sites and its <br /> Appendix A, both basea on concepts originally aevetoped in 1981 by the Central <br /> Vallev Regional Board staff, are revised periodically to accommodate statutorv, <br /> 1 regulation and policy changes Appendix A prescribes minimum report contents <br /> which are to be submitted for review and approval Appendix A streamlines the <br /> process for investigation and cleanup of sites to assure the discharger that the <br />' remediation system proposed is appropriate for the site subsurface conditions <br /> Appendix B for site closure has been developed to complete the documentation <br /> process Compliance with Regional Hoard's Appendix B is necessary before a request <br /> For closure may be submitted The request must include signatures or registered <br /> individuals as required by the California Business and Professions Code The <br /> purpose for a closure report is to provide a document upon which the regulator may <br /> make an objective decision regarding the requested closure The closure -eport and <br /> the Board's summary closure letter will remain on file in the Regional Board office <br />' for public review <br /> Central Vallev Regional Board staff recognize that total cleanup of a site, although <br />' generally possible, is not always feasible or warranted ("site" includes on- and/or off- <br /> site problems resulting from the release of underground storage tank contents) <br /> Therefore, closure of a site may be unconditional if the site has been rernediated <br /> successtuIly, or with conditions that "no further action is required at this time" when <br />' total cleanup can not be achie,,ed Regardless of the action requested, a closure report <br /> is required for Regional Board review The closure report is to document whether <br /> complete remediation of the site has been achieved, or that a "no further action" <br /> 1 closure of a site is warranted and that some soil or ground water contaminants will <br /> remain <br /> 1 T'ne report must discuss the site history, existing conditions, and rationale vhv the <br /> site may be closed with contamination remaining The rationale must include a <br /> tinding about future impacts on water quality and health The summary checklist is <br />' to be completed and submitted with the closure report by the Responsible Party6es) or <br /> their designee If it has been determined that only soil has been impacted evidence <br /> ',Libstannating the condition must be submitted <br />