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SECOR www secorcom <br /> ® INTERNATIONAL 3017 Kilgore Road Suite 100 <br /> INCORPORATED Rancho Cordova CA 95670 <br /> 916-861-0400 TEL <br /> 9i 6-861-0434 ROECEW <br /> F- <br /> January 30, 2004 f EB 0 % 2044 <br /> �N� HEAI.SH <br /> Mr Mike Infurna I [�IVIRONSRV�C�S <br /> San Joaquin County Environmental Health Department pERM <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> RE Quarterly Summary Report— Fourth Quarter 2003 <br /> SECOR Project No 77CP 64409 02 0001 <br /> Dear Mr Infurna <br /> On behalf of ConocoPhillips, SECOR International Incorporated is forwarding the quarterly summary <br /> report for the following location <br /> Service Station Location <br /> Former 76 Station 44409 1502 N EI Dorado Street, Stockton, CA <br /> Shallow and deep zone groundwater contour maps and a groundwater chemical concentration map <br /> are included as Figures 1, 2, and 3 TRC's fourth quarter groundwater monitoring report is included <br /> as Attachment A Certified laboratory analytical reports, chain-of-custody documentation, and field <br /> data sheets for the ARCO station, located at 16 East Harding Way, are included as Attachment B <br /> If you have questions or comments regard in rte rly summary report, please do not hesitate <br /> to contact me at (916) 861-0400 <br /> Sincerely, <br /> SECOR International Incorporated Na.0 <br /> * E7qx 181108 <br /> C <br /> Rusty E Benkosky, PQF <br /> Senior Engineer <br /> RBlsh <br /> Figures Figure 1 —Groundwater Elevation Contour Map - Shallow Water Bearing Zone <br /> Figure 2— Groundwater Elevation Contour Map- Deep Water Bearing Zone <br /> Figure 3—Groundwater Concentration Map <br /> Attachments Attachment A— Fourth Quarter 2003 Groundwater Monitoring Report (TRC) <br /> Attachment B— Fourth Quarter 2003 Certified Analytical Laboratory Reports, <br /> Chain-of-Custody Documentation, and Field Data Sheets (ARCO) <br /> cc Mr Ed Ralston, ConocoPhillips <br /> Mr James Barton, RWQCB—Central Valley Region <br /> 11ConocoPhiliips\Tosco Marketing144091Qssrs\4Q2003_QSR doc <br />