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1%.e S11101 <br /> PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DMSION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> �lFOR <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> CRAIG OGATA C (DFD <br /> SAN JOAQUIN COUNTY FACILITIES MANAGEMENT <br /> 222 E WEBER RM 675 <br /> STOCKTON CA 95202 DEC 0 31999 <br /> RE: Agricultural Commissioner's Office SITE CODE: 1793 <br /> 503 E. Tenth Street <br /> Tracy CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> has reviewed the "Revised Residual Hydrocarbon Mass Calculations", dated July 8, <br /> 1999, and the "Groundwater Monitoring Report, First Quarter 1999" dated March 29, <br /> # 1999, that were submitted by Ramage Environmental on behalf of the above referenced <br /> site and has the following comments. <br /> On February 18, 1999 the three on-site groundwater-monitoring wells were sampled. <br /> Analytical results were non-detect for all petroleum hydrocarbon constituents tested for. <br /> The residual hydrocarbon mass remaining in soil as presented in the submitted <br /> calculations is approximately 813 pounds. Determination of this mass was based on <br /> sample concentrations of total petroleum hydrocarbons as diesel (TPHd) collected from <br /> the bottom Of the former tank pit at the time of the tank removal, and from subsequent <br /> exploratory soil borings. Based on the data collected to date, the bulk of this residual <br /> soil contamination is located in the immediate vicinity of the former tank pit. <br /> The report recommends the evaluation of the potential threat of the residual petroleum <br /> hydrocarbon contamination at this site to groundwater quality and human health and the <br /> environment and, that based on this evaluation, a determination can be made as to the <br /> need for further corrective action. Please proceed with preparation of a feasibility study <br /> that considers at least two alternatives for their ability to remedy or mitigate the actual or <br /> potential threat posed iresidual contamination disposition. <br /> i <br /> r cost <br /> effectiveness. Incen the docmef recommendationscommndations for future site <br /> If you have any questions please call Lori Duncan at 209-4£8-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> La,: CA <br /> Lori Duncan, REHS Margare agorio, REHS <br /> x Supervisor, Unit IV <br /> i Site Mitigation Unit IV <br /> M. Marty Hartzell, CVRWQCB <br /> Joe Ramage, Ramage Environmental <br /> A Division of San Joaquin County Health Care Services <br />