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— P <br /> SECOR www secor com <br /> iNTERNATIONAL <br /> E C ® R INCORPORATED 3017 Kilgore Road Suite 100 <br /> Rancho Cordova,CA 95670 <br /> 916-861-0400 FAx <br /> 946-861-043U FAx <br /> October 13, 2003 D ECOVEDD <br /> Mike Infurna5 20fl <br /> San Joaquin County OCT <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor ENVIROWENT HEALTH <br /> Stockton, California 95202 PERMIT/SERVICES <br /> RE Chevron Groundwater Monitoring Report(302003) <br /> Chevron Station 9-6171 <br /> 6633 Pacific Avenue <br /> Stockton, California <br /> SECOR Protea No 77CH 00000 09 0017 <br /> Dear Mr Infurna <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 a Chevron service <br /> station located at 6633 Pacific Avenue, Stockton, California <br /> COMPLETED ACTIVITIES - THIRD QUARTER 2003 <br /> a Conducted quarterly groundwater monitoring and sampling <br /> a Prepared and submitted quarterly groundwater monitoring report <br /> PLANNED ACTIVITIES— FOURTH QUARTER 2003 <br /> ■ Conduct quarterly groundwater monitoring and sampling <br /> ■ Prepare and submit quarterly groundwater monitoring report <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 July 15, 2003 G-R's groundwater <br /> monitoring report is included as Attachment A Depth to groundwater across the site was <br /> approximately 35 feet below ground surface Groundwater elevation across the site increased an <br /> average of 2 94 feet from the previous sampling event Groundwater flow was to the southeast at an <br /> approximate gradient of 0 003 to 0 01 ft/ft A summary of laboratory results are listed below <br /> 11Chevronl96171Periodic Monitonng420034302003 OMR 96171 doc SECOR lntematlonat tncarporated <br />