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SECOR www secor com <br /> INTERNATIONAL 3475 West Shaw Avenue Suite 104 <br /> S E C 0 R INCORPORATED Fresno CA 93711 <br /> 559-271-2650 ML <br /> 559-271-5108 W <br /> i} <br /> February 23, 2006 <br /> FES 2 7 2006 <br /> Mr Jim Barton ENVIRONMENT HEALTH <br /> Regional Water Quality Control Board PERMIT PSERVICES <br /> Central Valley Region <br /> 11020 Sun Center Drive, Suite 200 <br /> Rancho Cordova, California 95670 <br /> RE Fourth Quarter 2005 Groundwater Monitoring Report <br /> Chevron Service Station 9-6171 <br /> 6633 Pacific Avenue <br /> Stockton, California <br /> SECOR Project No 94CH 96171 01 <br /> Dear Mr Barton <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental <br /> Management Company (EMC), has provided this report to summarize and evaluate the <br /> results of the fourth quarter 2005 (4Q2005) groundwater monitoring and sampling event at <br /> the above-referenced site The site is currently an active Chevron service station located at <br /> 6633 Pacific Avenue in Stockton, California (site) (Figure 1) <br /> COMPLETED ACTIVITIES — FOURTH QUARTER 2005 <br /> • SECOR prepared and submitted quarterly groundwater monitoring report for third <br /> quarter 2005 (3Q2005), <br /> • SECOR observed the 4Q2005 groundwater monitoring and sampling event on site <br /> performed by Gettler-Ryan Inc (G-R) and Levine-Fricke (LFR) on December 12, <br /> 2005 A total of 13 monitoring and extraction wells were sampled, <br /> • G-R and LFR conducted joint quarterly monitoring and sampling of groundwater <br /> extraction wells on-site wells GEW-007A, GEW-008A, and GEW-0228, off-site l� <br /> wells GEW-005A, GEW-006A, and GEW-023B, and, <br /> • G-R conducted groundwater monitoring and sampling of wells MW-2, MW-3, MW-4, <br /> MW-5, MW-6, MW-7, and MW-11 Wells MW-8, MW-9, MWA 0, MWA 2, MWA 3, <br /> and MW-14 were not sampled due to insufficient water <br /> PLANNED ACTIVITIES — FIRST QUARTER 2006 <br /> • SECOR will prepare and submit No Further Action Request Report (NFAR) to <br /> Regional Water Quality Control Board (RQWCB), <br /> • G-R will conduct first quarter 2006 (102006) groundwater monitoring and sampling, <br /> and, <br /> N lFilesiPro1ectslChevronlRetarl4#9-61711Penodlc Monitonng12005640MR140200SQMR doc <br />