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__ F <br /> SECOR www secor com <br /> INTERNATIONAL 3017 Kilgore Road Suite 100 <br /> E C ® R INCORPORATED Rancho Cordova CA 95670 <br /> 916 861-0400 TEL <br /> 91 fi 861 0430 FAX <br /> April 24, 2003 ��V�� V <br /> MAY 0 2 2003 <br /> Victoria McCartney <br /> San Joaquin County Environmental Health Department ENVIRONMENT HEALTH or <br /> 304 East Weber Avenue, Third Floor PERMIT/SERVICES <br /> Stockton, California 95202 <br /> b <br /> RE Chevron Groundwater Monitoring Report (1 Q2003) lud <br /> Chevron Station 9-1452 �1 <br /> 334 East Main Street �t/ <br /> Ripon, California <br /> SECOR Project No 77CH 00000 09 0004 <br /> Dear Ms McCartney <br /> SECOR International Incorporated is providing this report to summarize the recently <br /> completed groundwater-monitoring event at the above referenced site The site is located at 334 <br /> East Main Street, in Ripon, California <br /> COMPLETED ACTIVITIES - FIRST QUARTER 2003 <br /> . • Conducted quarterly groundwater monitoring and sampling <br /> ■ Prepared and submitted quarterly groundwater monitoring report <br /> ■ Completed additional groundwater assessment activities, including installation of monitoring <br /> well MW-8 <br /> • Prepared report of additional groundwater assessment activities <br /> • Performed groundwater pumping aquifer test using MW-8 <br /> PLANNED ACTIVITIES - SECOND QUARTER 2003 <br /> ■ Conduct quarterly groundwater monitoring and sampling <br /> ■ Prepare and submit quarterly groundwater monitoring report <br /> ■ Prepare report of groundwater pumping aquifer test <br /> i <br /> DISCUSSION <br /> The quarterly monitoring and sampling was performed by Gettler-Ryan, Inc (G-R) This <br /> groundwater monitoring and sampling event was performed on February 12, 2003 G-R's <br /> groundwater monitoring report is included as Attachment A Depth to groundwater across the site <br /> ranged from 28 54 to 31 93 feet below ground surface Groundwater elevation across the site <br /> increased an average of 1 42 feet from the previous sampling event Groundwater flow was to the <br /> west at an approximate gradient of 0 001 ft/ft A summary of laboratory results are listed below <br /> 14Chevront9145OPenodc Mondonng120031102003 QMR 91452 doc SECOR International incorporated <br />