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Q11? <br /> SECOR wwwsecorcom <br /> INTERNATIONAL 8017 Kilgore Road suite 100 <br /> S E C ® R INCORPORATED Rancho Cordova CA 95670 <br /> . <br /> 916861-0400 TEL <br /> I 916 861-043�0Fax <br /> J DID ���� <br /> October 27, 2003 <br /> OCT 2 9 2003 <br /> ENVIRONMEN I HEALTH <br /> Y <br /> Ms PERMIT/SERVICES Victoria McCartney ' <br /> San Joaquin County Environmental Health Devision VC1, <br /> 304 East Weber Avenue, Third Floor ( 1 <br /> Stockton, California 95202 <br /> RE Third Quarter 2003 Groundwater Monitoring Report <br /> Chevron Service Station 9-1452 <br /> 334 East Main Street <br /> Ripon, California 3� W <br /> SECOR Project No 77CH 00000 09 0004 <br /> Dear Ms McCartney <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental Management <br /> Company (Chevron), has provided this report to summarize the third quarter 2003 (302003) <br /> groundwater monitoring event at the above referenced site <br /> I <br /> COMPLETED ACTIVITIES—THIRD QUARTER 2003 <br /> I <br /> • Conducted quarterly groundwater monitoring and sampling and, <br /> ■ Prepared and submitted quarterly groundwater monitoring report <br /> I <br /> i <br /> PLANNED ACTIVITIES— FOURTH QUARTER 2003 <br /> ■ Conduct quarterly groundwater monitoring and sampling <br /> ■ Prepare and submit quarterly groundwater monitoring report <br /> r, <br /> DISCUSSION <br /> On August 11, 2003, Gettler-Ryan Incorporated (G-R) performed 302003 groundwater monitoring <br /> and sampling G-R's groundwater monitoring report is included as Attachment A Depth to <br /> groundwater across the site ranged from 32 67 to 34 94 feet below ground surface (bgs) <br /> Groundwater elevation across the site decreased an average of 3 43 feet from the previous sampling <br /> event The groundwater flow direction varied at an approximate gradient of 0 006 to 0 02 foot per <br /> feet (ft/ft) A summary of total petroleum hydrocarbons as gasoline (TPHg), benzene, and methyl <br /> tertiary butyl ether(MtBE) laboratory analytical data is listed below <br /> i <br /> 'L 9 <br /> 3 <br /> w <br /> 7 <br /> I <br /> 1 <br /> • <br /> 1 1Chevron1914521Penod1c Monrtonng120031302003 QMR 91452 doc SECOR Intematlonal Incorporated <br />