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SECOR vvvvvv,secor.com <br /> INTERNATIONAL 3017 Kilgore Road,Suite 100 <br /> S E C O R INCORPORATED Rancho Cordova,CA 95670 <br /> 916$81-0400 TEL <br /> 916-861-0430 FAz <br /> D <br /> April 30, 2004 <br /> APR 2 9 2004 <br /> Harlin Knoll �N1/fRON�v�E�r <br /> San Joaquin County Environmental Health Department HEALTH <br /> 304 East Weber Avenue, Third Floor PERMIT/SERVICES <br /> Stockton, California 95202 <br /> RE: First Quarter 2004 Groundwater Monitoring Report <br /> Chevron Station 9-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton, California <br /> SECOR Project No.: 77CH.00000.23.0016 <br /> Dear Mr. Knoll: <br /> SECOR International Incorporated is providing this report to summarize the first quarter groundwater <br /> monitoring event at the above referenced site. <br /> COMPLETED ACTIVITIES - FIRST QUARTER 2004 <br /> ■ Conducted quarterly groundwater monitoring and sampling. <br /> {` ■ Prepared and submitted quarterly groundwater monitoring report. <br /> PLANNED ACTIVITIES — SECOND QUARTER 2004 <br /> ■ Conduct quarterly groundwater monitoring and sampling. <br /> ■ Prepare and submit quarterly groundwater monitoring report. <br /> DISCUSSION <br /> On January 23, 2004, Gettler-Ryan Incorporated (G-R) performed the first quarter groundwater <br /> monitoring and sampling event for 2004. G-R's Groundwater monitoring report is included as <br /> Attachment 1. Depth to groundwater across the site ranged from 38.49 to 40.73 feet below ground <br /> surface (bgs). Groundwater elevation across the site increased an average of 5.36 feet from the <br /> previous sampling event. The groundwater direction varied and was reported at an approximate <br /> gradient of 0.006 to 0.01 feet per foot (ft/ft). Ten wells were sampled during this event. A summary <br /> of laboratory data is listed below. <br /> l:lChevron1932324Penodic Monitoring120041902004 QMR 93232.doc SECOR International Incorporated <br />