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Mr. Joe Herrud, Leprino Foods• - 3 - 0 4 December 2013 <br /> Leprino Facility, 2401 MacArther Drive, Tracy <br /> 2. The Closure Request does not include an analysis of the threat to groundwater from the <br /> remaining diesel pollution in Site soil. Leprino needs to evaluate the concentration levels <br /> and quantities of diesel that remains in the Site soil and provide estimates of the <br /> potential effect of that residual diesel upon the groundwater. <br /> Therefore, Central Valley Water Board staff does not concur with Leprino's Site Closure <br /> Request. <br /> Central Valley Water Board staff are also concerned that there are several wells within the <br /> source area that are not being sampled. Leprino should begin collecting groundwater samples <br /> from all Site groundwater wells and include the resulting analytical data in groundwater <br /> monitoring reports. Groundwater samples should be analyzed for total petroleum hydrocarbons <br /> as diesel (TPHd) and naphthalene. Quarterly monitoring reports are due by 1 February, 1 May, <br /> 1 August, and 1 November. The Attachment provides the information that should be included <br /> in the monitoring reports. Leprino should include trend graphs for Site monitoring wells and <br /> estimates of when remaining concentrations will reach WQOs in future monitoring reports. <br /> If you have any questions.regarding this letter, you may contact me by phone at (916) 464-4819 <br /> or by email at kshelton(cDwaterboards.ca.aov. <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, Golden, Colorado <br />