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Mr. Robert Garcia • -3- 40 1 June 2011 <br /> Central Valley Water Board staff concur with the request in the Semi Annual Report to <br /> evaluate the Site for closure. Although we need four groundwater monitoring events to <br /> evaluate the potential for rebound, a no further action request report will identify whether the <br /> site is eligible for closure once you complete the groundwater monitoring for rebound. By <br /> 1 August 2011, Leprino should submit a no further action request report that includes the <br /> following information: <br /> Complete Site history and current Site conditions <br /> Summary of all remedial actions <br /> • Site geology and hydrogeology <br /> Sensitive Receptor survey including water supply wells and surface water <br /> • Map showing the location of all water supply wells used for municipal, domestic, <br /> agriculture, industrial, and other uses within 2,000 feet of the Site <br /> Site maps showing approximate location of original release, former tank location, <br /> excavation area, soil sample locations, all active and abandoned monitoring wells, <br /> groundwater elevation contours, buildings, and any nearby surface water <br /> Boring logs for all wells and soil borings <br /> Volume and fate of excavated soil <br /> • Table summarizing all groundwater and soil monitoring data <br /> • Discuss concentration and mass changes over time, and current concentrations of <br /> contaminants remaining in groundwater <br /> • Isoconcentration contour maps of contaminants of concern <br /> Summary of the remedial methods used and the calculated zone of capture <br /> • Estimate of the mass of contamination remaining in soil, groundwater and soil vapor <br /> If you have any questions regarding this letter, you may contact me at (916) 464-4819 or <br /> kshe/lto'n(cDwaaterboards.ca.gov. <br /> KRISTI SHELTON, P.E. <br /> Water Resources Control Engineer <br /> Aboveground Tanks Cleanup Unit <br /> cc: Ms. Lori Duncan, San Joaquin County Environmental Health Services, Stockton <br /> Mr. Reed Azevedo, Leprino Foods Company, Tracy <br /> Mr. Brendan Shine, Tetra Tech GEO, Westminster, Colorado <br />