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f' SECOR www secor cam <br /> INTERNATIONAL <br /> S E C ® R INCORPORATED 3017 Kilgore Road,Suite 100 <br /> Rancho Cordova CA 95670 <br /> 916 861-0400 TEL <br /> 916861-MO FAX <br /> �ECMVEB <br /> April 29,2003 <br /> MAY 0 12003 <br /> Mike Infurna ENVIRONMENT HEALTH <br /> San Joaquin County PERMIT <br /> Environmental Health Division /SERVICES <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> RE Chevron Groundwater Monitoring Report (1 Q2003) <br /> Chevron Station 9-1848 <br /> 1257 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 Yosemite <br /> Avenue, Manteca, California <br /> . COMPLETED ACTIVITIES - FIRST QUARTER 2003 <br /> ■ Conducted quarterly groundwater monitoring and sampling <br /> ■ Prepared and submitted quarterly groundwater monitoring report <br /> PLANNED ACTIVITIES- SECOND 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 January 18, 2003 G-R's <br /> groundwater monitoring report is Included as Attachment A Depth to groundwater across the site <br /> was approximately 15 feet below ground surface Groundwater elevation across the site increased <br /> an average of 2 67 feet from the previous sampling event Groundwater flow was to the northeast at <br /> an approximate gradient of 0 003 ft/ft A summary of laboratory results are listed below <br /> i <br /> 1 IChevron1918481Periodic Monitoring120031102003 91848 doc <br />