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1 <br /> SECOR vwvw secor corn <br />' INTERNATIONAL 3017 Mgore Road Suite 100 <br /> S E C O R JNCORPORATED Rencho Cordova,CA 93870 <br /> 81081-0400 in <br /> 610-0810430 nu <br />' October 8, 2004 <br /> Mr Harlin Knoll <br />' San Joaquin County <br /> Environmental Health Division <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, Califomia 95202 <br />' RE Third Quarter 2004 Groundwater Monitoring Report <br /> Chevron Service Station 9.2396 <br /> 25651 Highway 99 North <br />' Acampo, California <br /> SECOR Project No 77CH 00000 23 0012 <br />' Dear Mr Knoll <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental Management <br /> Company (Chevron), has provided this report to summarize the results of the third quarter 2004 <br /> (302004)groundwater monitoring event at the above-referenced site <br /> COMPLETED ACTIVITIES -THIRD QUARTER 2004 <br /> lie c Conducted quarterly groundwater monitoring and sampling, and, <br /> • Prepared and submitted quarterly groundwater monitoring report <br /> PROPOSED ACTIVITIES -FOURTH QUARTER 2004 <br /> ■ Conduct quarterly groundwater monitoring and sampling, <br />' Prepare and submit quarterly groundwater monitoring report,and. <br /> ■ Prepare and submit no further action required report <br />' DISCUSSION <br /> On July 29, 2004, Gettler-Ryan, Incorporated (G-R) performed 302004 groundwater monitoring and <br /> sampling G-R's groundwater monitoring report is included In Attachment A Depth to groundwater <br /> Iacross the site ranged from 78 65 to 79.91 feet below ground surface (bgs) Groundwater elevation <br /> across the site decreased an average of 198 feet from the previous sampling event Groundwater <br /> Flow was calculated to the south at an approximate gradient of 0 003 feet per foot(fvft) A summary <br /> I of total petroleum hydrocarbons as gasoline (TPHg), benzene, and methyl tertiary butyl ether(MtBE) <br /> laboratory analytical data is Ilsted below <br /> !1Chevront92396%Perfoc4e Monnonng1Y004 702004 QMR 92396 doc SECOR rntemefronel fr: ra <br /> corpo led <br /> I <br />