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SECOR www secor com <br /> INTERNATIONAL <br /> S E C ® R INCORPORATED 3017 Kilgore Road Suite 100 <br /> Rancho Cordova,CA 95670 <br /> • 91 -861 0400 TEL <br /> 8166-8810430 FAX <br /> nD <br /> July 7,7 2003 ra V � <br /> JUL 10 2003 <br /> Mike Infurna ENpERMI�JSERVICE5 H <br /> San Joaquin County <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> RE Chevron Groundwater Monitoring Report (202003) <br /> Chevron Station 9-1848 <br /> 1257 West Yosemite Avenue <br /> Manteca, California <br /> SECOR Project No 77CH 00000 09 0006 <br /> Dear Mr Infurna <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental Management <br /> Company, Is providing this report to summarize the recently completed groundwater-monitoring <br /> event at the above referenced site The site is an active service station located at 1257 West <br /> Yosemite Avenue, Manteca, California <br /> . COMPLETED ACTIVITIES - SECOND QUARTER 2003 <br /> ■ Conducted quarterly groundwater monitoring and sampling <br /> • Prepared and submitted quarterly groundwater monitoring report <br /> PLANNED ACTIVITIES—THIRD 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 April 18, 2003 G-R's groundwater <br /> monitoring report Is Included as Attachment A Depth to groundwater across the site was <br /> approximately 15 feet below ground surface Groundwater elevation across the site decreased an <br /> average of 0 29 feet from the previous sampling event Groundwater flow was to the northeast at an <br /> approximate gradient of 0 002 ft/ft A summary of laboratory results are listed below <br /> 1 10hevron1918481Periodlc Monitoring120031202003 91848 doc <br />