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� _ ! <br /> J Ls S#h Joaquin County <br /> DI <br /> environmental Health Department RECTOR <br /> Donna Heran, REHS <br /> r.` y 600 East Main Street <br /> c. PROGRAM COORDINATORS <br /> Stockton, California 95202-3029 <br /> Robert McClellon,REHS I <br /> Jeff Carruesco,REHS, RDI <br /> ' ^ Kasey Foley, REHS <br /> c9>'iFo'R�:P Website: www.sjgov.org/ehd Linda Turkatte.REHS <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> March 30, 2011 <br /> Denis L. Brown Hung Tran & Mary Nguyen <br /> Shell Oil Products US Pacific Avenue Shell Station <br /> 20945 S. Wilmington Blvd. 6131 Pacific Avenue <br /> Carson, CA 90810-1039 Stockton, CA 95207 <br /> Subject: Shell-Branded Service Station <br /> 6131 Pacific Avenue <br /> Stockton, CA 95207 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Site <br /> Investigation Report and 4' Quarter 2010 Groundwater Monitoring Report (Report), dated <br /> March 10, 2011, submitted on your behalf by Conestoga-Rovers & Associates (CRA) and <br /> has the following comments. <br /> The Report documents a site investigation conducted in October 2010, when two <br /> groundwater monitoring wells and four cone penetrometor test (CPT) borings were <br /> installed onsite. The report contained a recommendation to prepare an updated site <br /> conceptual model (SCM)to better characterize the site, and to evaluate risks and potential <br /> remedial technologies. <br /> A Site Conceptual Model (SCM) was submitted for this site in October 2003. As it is <br /> appropriate after each new phase of investigation completed at a site to update the SCM, <br /> the EHD concurs with that recommendation. The updated SCM is due for submittal to the <br /> EHD no later than May 20, 2011. <br /> If you have any questions please contact Lori Duncan at (209) 468-0337 or by email at <br /> Iduncan@sjcehd.com. <br /> Lori Duncan, REHS Nuel C. Henderson, Jr. PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: James Barton, CVRWQCB, 10020 Sun Center Drive#200, Rancho Cordova, CA 95670 <br /> Mike Murphy, CRA, 19449 Riverside Drive #230, Sonoma, CA 94576 <br />