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SECOR vvww secor com <br /> INTERNATIONAL 3017 Kilgore Road Suite 100 <br /> p� <br /> S E C ® �[ INCORPORATED Rancho Cordova CA 95670 <br /> 916-861-0400 TEL <br /> 916-861-0430 Fax <br /> July 30, 2004 <br /> Mr Jeffrey Wang R ECIEME10 <br /> San Joaquin County JUL 3 0 2004 <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor ENVIRONMENT HEALTH <br /> Stockton, California 95202 PERMIT/SERVICES <br /> RE Second Quarter 200413roundwater Monitoring Report <br /> Chevron Service Station 9-6258 <br /> 2409 East Main Street <br /> Stockton, California <br /> SECOR Project No 77CH 00000 23 0023 <br /> Dear Mr Wong <br /> SECOR International Incorporated (SECOR), on behalf of Chevron Environmental Management <br /> Company (Chevron), has provided this report to summarize the results of the second quarter 2004 <br /> (2Q2004) groundwater monitoring event at the above-referenced site <br /> COMPLETED ACTIVITIES - SECOND QUARTER 2004 <br /> - Conducted quarterly groundwater monitoring and sampling, and, <br /> ■ Prepared and submitted quarterly groundwater monitoring report <br /> PLANNED ACTIVITIES —THIRD QUARTER 2004 <br /> ■ Conduct quarterly groundwater monitoring and sampling, and, <br /> ■ Prepare and submit quarterly groundwater monitoring report <br /> DISCUSSION <br /> On April 21, 2004, Gettler-Ryan, Incorporated (G-R) performed 2Q2004 groundwater monitoring and <br /> sampling G-R's groundwater monitoring report is Included In Attachment A Depth to groundwater <br /> across the site ranged from 53 68 to 54 80 feet below ground surface (bgs) Groundwater elevation <br /> across the site decreased an average of 0 98 feet from the previous sampling event Groundwater <br /> flow was calculated to the southwest at an approximate gradient of 0 01 to 0 02 feet per foot (ft/ft) A <br /> summary of total petroleum hydrocarbons as gasoline (TPHg), benzene, and methyl tertiary butyl <br /> ether(MtBE) laboratory results are listed below <br /> 11Chev=1962581Penodlc Monitonng4200412Q2004 QMR 96258 doc SECOR International Incorporated <br />