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May i .il <br /> SECOR www secorcom <br /> INTERNATIONAL 3475 West Shaw Ave Suite 104 <br /> S E (_ ® R INCORPORATED Fresno CA 93711 <br /> 559-271-2650 Tei. <br /> 1_�=B � fLDJ, <br /> January 23, 2006 JAN 2 3 2006 <br /> it" <br /> ENVIRONNIFNT HEALTH F <br /> PERMIT/SERVICES <br /> Ms Vicki McCartney <br /> San Joaquin County/ Environmental Health Department Cr/�-2,q ' <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202-2708 <br /> RE Fourth Quarter 2005 Groundwater Monitoring Report <br /> Chevron Station 9-2033 <br /> 508 West Charter Way ` <br /> Stockton, California <br /> SECOR Project No 77CH 92033 05 <br /> Dear Ms McCartney <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental <br /> Management Company (EMC), has provided this report to summarize the results of the <br /> fourth quarter 2005 (4Q2005) groundwater monitoring event at the above-referenced site <br /> • The site is currently a Chevron service station located at 508 West Charter Way, Stockton, 4 <br /> California <br /> COMPLETED ACTIVITIES - FOURTH QUARTER 2005 <br /> eT <br /> ■ Conducted quarterly groundwater monitoring and sampling, <br /> ■ Prepared and submitted quarterly groundwater monitoring report, and, <br /> PLANNED ACTIVITIES — FIRST QUARTER 2006 <br /> ■ Conduct quarterly groundwater monitoring and sampling, <br /> ■ Prepare and submit quarterly groundwater monitoring report, F <br /> ■ Submit an addendum to the work plan summarizing field work and proposing <br /> monitoring well locationsd <br /> t <br /> DISCUSSION <br /> On November 7, 2005, Gettler-Ryan Incorporated (G-R) performed 4Q2005 groundwater ~T5 <br /> monitoring and sampling (Attachment A) Groundwater elevation across the site ranged <br /> from -12 09 to -12 62 feet below mean sea level (msl) Groundwater elevation across the . <br /> site decreased an average of 1 18 feet from the previous sampling event Groundwater y; <br /> flow was calculated to the northeast at an approximate gradient of 0 007 <br /> q <br /> N IFilesIProfectsIChevronlRetaiA#9-20331Penodic Monitonng1200514QMR05WQ2005 QMR 92033 doc d <br /> 1 p^f <br />