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Fourth Quarter 2002 Monitoring and Sampling Report 5 <br />' 7-Eleven, Inc Store No 17334 4501 North Pershing Avenue,Stockton CA January 13,2003 <br /> Dissolved MTBE concentrations In well MW-4 have steadily declined from a high of 7,770 ug/L in February <br /> 2000 to 1,100 ug/L during the current quarter Additional downgradient plume delineation has been requested <br /> and approved by the SJCPHS Property access for offsite drilling was verbally approved in November 2002 by <br />' Elvera Batres (Century 21, 4560 N Pershing Avenue, parcel number 110-210-07-corner of N Pershing <br /> Avenue and Monoco Court), who owns private property to the northeast of the site Upon proposed well <br /> location approval by the SJCPHS, Ms Batres can be contacted for her signature on a written access <br />' agreement <br />' A workplan for remediation activities will be submitted as appropriate, as requested by the SJCPHS If <br /> remediation is required by the SJCPHS, findings will be reported on a quarterly basis with groundwater <br /> analytical data <br /> If you have any questions or comments concerning this quarterly report, please call our Concord office at <br /> (925) 288-2348 <br />' Sincerely, <br /> Shaw Environmental, Inc <br /> Submitted by Approved by <br /> Kim Metez helby Lathrop <br /> Staff Geologist Project Manager <br /> 101 <br /> Ed K Slmonls, R G <br /> Senior Geologist No 4421 <br /> c Mr Harlin Knoll -San Joaquin Co Public Health Services/ Environmental Health Department �'CAt 1�0 r <br /> Mr James Brathovde—California Regional Water Quality Control Board-CVR <br /> Attachments <br /> 1 Figures <br /> 2 Tables <br /> I3 Field Data Sheets <br /> 4 Laboratory Analytical Report for Groundwater Samples <br /> I <br /> 173341124 QMR DOG <br />