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f� SECOR www secor com <br /> INTERNATIONAL 3017 Kilgore Road Suite 100 <br /> ho <br /> S ECO R INCORPORATED 916`861-0404vaTECA95670 <br /> 916-861-0430 FAX <br /> July 15, 2004 <br /> Mike Infurna �ECEV L�,D <br /> San Joaquin County <br /> Environmental Health Division JUL 14 2004 <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 ENVIRONMENT HEALTH <br /> RE Chevron Groundwater Monitoring Report (2Q2004) PERMIT/SERVICES <br /> Chevron Station 9-1848 <br /> 1257 West Yosemite Avenue <br /> Manteca, California <br /> SECOR Project No 77CH 00000 23 0008 <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 2004 <br /> ■ Conducted quarterly groundwater monitoring and sampling <br /> ■ Prepared and submitted quarterly groundwater monitoring report <br /> PLANNED ACTIVITIES --THIRD QUARTER 2004 <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) on April 21, 2004 <br /> G-R's groundwater monitoring report is included as Attachment A Depth to groundwater across the <br /> site was approximately 17 feet below ground surface Groundwater elevation across the site <br /> Increased an average of 0 69 feet from the previous sampling event Groundwater flow was to the <br /> north at an approximate gradient of 0 005 ft./ft A summary of laboratory results are listed below <br /> • <br /> 1 1Chevron1918481Penodic Monitonng12004=2004 91848 doc SECOR International Incorporated <br />