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rj'*CAMBRIA <br /> December 15,2005 <br /> Mr Mike Infurna <br /> San Joaquin County <br /> I <br /> Environmental Health Division <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, CA 95202 <br /> Re Site Status Report Fourth Quarter 2005 and SamplinReduction Request <br /> Chevron Service Station#9-1848 <br /> 1257 West Yosemite Avenue <br /> Manteca, CA <br /> Dear Mr Tnfuma - <br /> On behalf of Chevron Environmental Management Company(Chevron), Cambna Environmental <br /> Technology(Cambna)is submitting this quarterly status report for the site referenced above <br /> FOURTH QUARTER 2005 ACTIVITIES <br /> • Groundwater Monitonng: On October 31, 2005 Gettler Ryan (G-R) of Dublin, <br /> California gauged and sampled monitoring wells C-1 through C-3 G-R's groundwater <br /> monitoring report is presented as Attachment A <br /> GROUNDWATER MONITORING SUMMARY <br /> I <br /> Site Hydrology <br /> Minimum groundwater elevation 10 78 feet above ms] <br /> Maximum groundwater elevation 10 97 feet above msl <br /> Approximate groundwater flow direction(current) Northeast <br /> Approximate hydraulic gradient 0 003 <br /> Cambria <br /> Environmental <br /> Technology,Inc <br /> I&11 Carus Avenue <br /> quite 12 <br /> Rocklin CA 95677 <br /> Tel(916)630-1855 <br /> Fax(916)630-1856 ' <br />