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San Joaquin Cc unty `A DIRECTOR <br /> PpurN Donna Heran,RENS <br /> Environmental Health Department p ASSISTANT DIRECTOR <br /> 600 East Main S reet Laurie Cotulla,REHS <br /> PROGRAM COORDINATORS <br /> >- Stockton, California 9 202-3029 <br /> •' 3. Carl Borgman, REHS <br /> Mike Huggins, REHS, RDI <br /> 4�t1:0 Website: www.sjgov.o^g/ehd Margaret Lagorio, REHS <br /> Phone: (209) 468-3420 Robert McClellon, REHS <br /> Fax: (209) 464-0138 Jeff Carruesco, REHS, RDI <br /> Kasey Foley, REHS <br /> DENI S L. BROWN MAY 2 3 ID07 <br /> SHELL OIL PRODUCTS US <br /> HSE - ENVIRONMENTAL SERVICES <br /> 20945 SOUTH WILMINGTON AVENUE. <br /> CARSON CA 90810-1039 <br /> RE: Former Shell Service Station SITE CODE: 000692 <br /> 1313 East Charter Way <br /> Stockton, California 95205 <br /> San Joaquin County Environmental Health Dep a ment (EHD) has reviewed analytical <br /> results for groundwater samples collected quarterly at the above-referenced site. Although <br /> a temporary groundwater extraction system is currently operating at this site, <br /> concentrations for 1,2-dichloroethane (1,2-DCA) c `ntinue to be detected in groundwater <br /> samples collected quarterly from monitoring well MWA, MW-2, MW-5, and MW-6. <br /> Two of these wells (MW-2 and MW-6) are located within twenty feet of East Charter Way <br /> yet no investigation has been initiated to laterally delineate the 1,2-DCA plume south of <br /> these wells. Please submit a work plan to EHD by July 20, 2007, that will laterally <br /> delineate the groundwater plume to the south of your site. <br /> EHD is not being notified of scheduled quarterly groundwater monitoring events. Please <br /> notify the EHD at least forty-eight hours prior to future groundwater monitoring events. If <br /> you have any questions regarding this letter, please ontact Vicki McCartney at (209) 468- <br /> 9852 or at vnn.ccartneyL�sjcchd.com. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Victoria L. McCartney, Senior REHS Nuel C. Henderson, Jr., PG <br /> Unit N, Site Mitigation Engineering Geologist <br /> Unit IV, Site Mitigation <br /> c: James L.L. Barton, PG- CVRWQCB <br /> Joe W. Neely, PG-Conestoga-Rovers & As 3ociates <br />