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San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> s: . 600 East Main Street <br /> a: "` '{ PROGRAM COORDINATORS <br /> Stockton, California 95202-3029 Robert McClellon,REHS <br /> • Jeff Carruesco,REHS,RDI <br /> Cq .:- ::•a�P Website: www.sjgov.org/ehd Kasey Foley,REHS <br /> L/FOR <br /> Phone: (209)468-3420. <br /> Fax: (209)464-0138 . <br /> May 21, 2010 <br /> Mr. Denis L. Brown <br /> Shell Oil Products US <br /> HSE— Environmental Services <br /> 20945 South Wilmington Avenue <br /> Carson, California 90810-1039 <br /> Subject Interstate Shell <br /> 620 West Charter Way <br /> Stockton, California 9520.6 <br /> Dear Mr. Brown: <br /> As part of your site characterization, please provide the San Joaquin County <br /> Environmental Health Department (EHD) an evaluation of site-specific analytical data <br /> compared to the Environmental Screening Levels (ESLs) established by the San <br /> Francisco Bay Regional Water Quality Control Board, and the California Human Health <br /> Screening Levels (CHHSLs) published by the Office of Environmental Health Hazard <br /> Assessment, California Environmental Protection Agency, and the potential for vapor <br /> intrusion into buildings. Please submit a Human Health'Risk Assessment (HHRH) to the <br /> EHD by September 27, 2010, that includes the evaluation of ESLs, CHHSLs, and the <br /> potential for vapor intrusion into existing onsite buildings. Submit a work plan to the EHD <br /> by July 16, 2010, if warranted, to assess the potential for vapor intrusion into the existing <br /> onsite buildings. <br /> Please contact Vicki McCartney at (209) 468-9852 or by email at v.mccartney@sicehd.com <br /> if you have any questions regarding this letter. <br /> Sincerely, <br /> 62 <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Mr. Tom Magney, Conestoga-Rovers & Associates, 19449 Riverside Drive, Suite 230, <br /> Sonoma, CA 95476 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control.Board Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br />