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San Joaquin County <br /> 'P \ Environmental Health Department iso c DIRECTOR <br /> p <br /> Donna Heran, REHS <br /> z... �` 600 East Main Street <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> . . ;i' Robert McClellon, REHS <br /> — _ -- — Jeff Carruesco. REHS, RDI <br /> �V Kasey Foley, REHS <br /> Website: www.sjgov.org/ehd <br /> <<F o R% Linda Turkatte, REHS <br /> '- - Phone: (209) 468-3420 <br /> Fax: 209) 464-0138 <br /> April 16, 2012 <br /> Mr. Denis L. Brown Mr. Joseph P. Faso, etal <br /> Shell Oil Products USA 4453 Yacht Harbor <br /> HSE - Environmental Services Stockton, CA 95204 <br /> 20945 S. Wilmington Ave. <br /> Carson. CA 90810 <br /> Mr. Darin & Ms. Venus Collins <br /> 1036 W. Robinhood Drive, Suite 205 <br /> Stockton, CA 95207 <br /> Subject: Former Shell Service Station LOP Case#. 505602 <br /> 1267 Country Club Blvd. AP#: 113-042-17 <br /> Stockton, CA 95204 Global ID#: T0607700721 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Site Investigation <br /> Report (Report) dated May 5, 2011, submitted on your behalf by Conestoga-Rovers & Associates <br /> (CRA). In the Report, CRA concludes that the horizontal extent of diesel and gasoline constituents <br /> in groundwater beneath and down gradient of the site is generally defined. In addition, CRA <br /> concludes that residual petroleum hydrocarbon concentrations do not pose a soil vapor intrusion <br /> risk and that no additional assessment is warranted, and requested the EHD to evaluate the site for <br /> case closure. <br /> If you wish to have your site considered for closure, please provide a closure report that includes <br /> the following: <br /> 1. A calculation of the residual contaminant mass sorbed in both soil and dissolved <br /> groundwater. <br /> 2 A prediction of how long (in years) it will be until the dissolved contaminant concentrations <br /> on site decline to water quality goals. <br /> 3. A discussion of the potential vapor intrusion threat from the residual contamination in both <br /> soil and groundwater. <br /> 4. Confirmation that a sensitive receptor survey has been completed for this site, and <br /> 5. All requirements of the Tri-Regional Guidelines Appendix A. <br /> If you have any questions please call Lisa Medina at (209) 468-3455, or by email <br /> Imedina s ehd.com. <br /> 71� <br /> Lisa Medina. REHS Nuel C. Henderson Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c Mr. James L. Barton, CVRWQCB, Underground Storage Tank Unit, 11020 Sun Center Drive. <br /> #200, Rancho Cordova, CA 95670-6114 <br /> Mr. MarK Owens, SWRCB, Division of Clean Water Programs, Underground Storage Tank <br /> Program, P.O. Box 944212, Sacramento, CA 94244-2120 Mr. Tom Sparrowe, Conestoga- <br /> Rovers ,& Assoc , 5900 Hollis St., Suite A, Emeryville, CA 94608 <br /> Ms. Penny Jasper or Mr. Phil Metzger, Bank of the West, 1450 Treat Blvd., Walnut Creek, CA <br />