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PUBLIC HEALTH SERVICES ,0PQ.��.�o <br /> SAN JOAQUIN COUNTY Q ;% <br /> ENVIRONMENTAL HEALTH DIVISION 5.. s ` <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 qt,,FORa <br /> 209/468-3420 <br /> WELDON CHURCH APR 2 3 2001 <br /> 1958 YOSEMITE ROAD <br /> BERKELEY CA 94707 <br /> RE: Weldon Church Property <br /> 104 West Beverly <br /> Tracy,CA <br /> San Joaquin County Public Health Services,Environmental Health Division(PHS/EHD)has reviewed the <br /> "Groundwater Monitoring Report—First Quarter 2000"submitted on your behalf by Advanced <br /> GeoEnvironmental,Inc. (AGE)on August 11,2000. The report includes a summary of site investigations, <br /> findings,a receptor survey,and a calculation of the hydrocarbon mass remaining in soil and groundwater at <br /> the site located at 104 West Beverly in Tracy,California(site). It also includes a request for closure <br /> consideration. <br /> Before a site can be closed with contamination in place,the horizontal and vertical extent of soil and <br /> groundwater contamination must be defined at the site. Additionally,the plume must be demonstrably <br /> declining or,at the very least, stable. Neither of these conditions has been met at the site. Groundwater <br /> contamination has not been delineated in the northwest direction at the site, and petroleum hydrocarbon <br /> concentrations have been erratic in samples collected from monitoring wells MW-1 and MW-4. Therefore, <br /> request for closure is denied. <br /> PHS/EHD hereby directs you to resume quarterly monitoring at the site. In addition to groundwater <br /> monitoring, you are hereby directed to implement the"Revised Work Plan for Soil and Groundwater <br /> Investigation—Addendum"prepared and submitted on your behalf by AGE on January 5,2000. The work <br /> plan is approved as written. However,please include one additional sampling point between MW-1 and <br /> the underground storage tank excavation to be used to assess the vertical extent of contamination at the site. <br /> Previously,the caseworker for this site was Mr.Ron Rowe. Because Mr.Rowe is no longer with <br /> PHS/EHD,the site will be assigned to a new caseworker. In the interim,Dot Lofstrom will provide <br /> PHS/EHD oversight. If you have any questions,please feel free to call her at(209)468-3436. <br /> Donna Heran,REHS,Director <br /> Environmental Health Services <br /> Dot Lofstrom,R.G. <br /> LOP/Site Mitigation Unit <br /> cc: Nuel Henderson,AGE <br /> Marty Hartzell,CVRWQCB <br /> A Division of San Joaquin County Health Care Services <br />