Laserfiche WebLink
Og :00 <br />Water Boards <br />Eorourvo G. BROWN JR. <br />GOVERNOR <br />MATTHEW RODRIQUEZ <br />SECRETARY FOR <br />ENVIRONMENTAL PROTECTION <br />Central Valley Regional Water Quality Control Board <br />19 August 2014 <br />Belinda May, LTC <br />Environmental Compliance Officer <br />10620 Mather Road <br />Mather, CA 95655-4176 <br />RESPONSE TO COMMENTS ON ANNUAL GROUNDWATER MONITORING <br />REPORT & REMEDIAL ACTION COMPLETION REPORT FOR OXYGEN- <br />ENHANCED BIOREMEDIATION, ARMY AVIATION SUPPORT FACILITY, <br />STOCKTON CALIFORNIA ARMY NATIONAL GUARD COMPLEX, SAN JOAQUIN <br />COUNTY <br />Central Valley Regional Water Quality Control Board staff (Central Valley Water Board <br />staff) has reviewed the California Army National Guard's (CA ARNG's) responses to our <br />comments dated 31 July 2014 on the Annual Groundwater Monitoring Report & <br />Remedial Action Completion Report for Oxygen-Enhanced Bioremediation (Annual <br />Report). Your responses satisfy most of our comments except for General Comment 2 <br />and Specific Comment 3 discussed below. These two comments and CA ARNG's <br />responses (shown in red) are repeated below along with the additional revisions we are <br />requesting to fully address our comments on the Annual Report. <br />General Comment 2: The Annual Report states the AASF meets the general and <br />media-specific criteria described in the Low-Threat Underground Storage Tank Closure <br />Policy (Policy) and relies primarily on the Policy to assess whether the site is ready for <br />closure. While we don't disagree with evaluating the site using the Policy, it only applies <br />to underground storage tank sites. The AASF site also contains a suspected former <br />wash rack that appears to be the source of low concentrations of solvents such as <br />trichloroethene and tetrachloroethene detected in site groundwater. A complete <br />evaluation of the AASF site for closure must consider the residual solvents. Therefore, <br />the Annual Report needs to be revised to provide a summary of the findings from the <br />2011 investigation report on potential releases from the wash rack and to explain why <br />additional actions are unnecessary for the solvents. <br />California Army National Guard Response: Section 1.2- Site Description and History, <br />second last paragraph, the following text is inserted: <br />KARL E. LONGLEY ScD, P.E., CHAIR I PAMELA C. CREEDON P.E., BCEE, EXECUTIVE OFFICER <br />11020 Sun Center Drive #200, Rancho Cordova, CA 95670 I www.waterboards.ca .govicentralvalley <br />C) RECYCLED PAPER