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r � - <br /> I <br /> Ir r dij <br /> \ SECOR www secor corn <br /> INTERNATIONAL 3017 Kilgore Road Suite 100 <br /> E (C ® R INCORPORATED Rancho Cordova CA 95670 <br /> 916 861-0400 TEL <br /> 916 861-0430 Fax <br /> February 13, 2003 P!E, �C v C 2���]IE 10 <br /> i <br /> Mr Mike Infurna FEB 1 4 2003 <br /> San Joaquin County Environmental Health Department ENVIRL)NtillENT HEALTH <br /> 304 East Weber Avenue, Third Floor PERMIT/SERVICES <br /> Stockton, California 95202 <br /> RE Quarterly Summary Report- Fourth Quarter 2002 <br /> SECOR Project No 77TO 64409 01 0034 <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 Tosco (Unocal) Station#4409 1502 N El 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 Gettler-Ryan Inc (GRI), fourth quarter groundwater monitoring <br /> report is included as attachment A Certified laboratory analytical reports, chain of custody <br /> documentation, and field data sheets for the Arco station, located at 16 East Harding Way, are <br /> Included as attachment B <br /> If you have questions or comments regarding this quarterly summary report, please do not hesitate <br /> to contact me at (916) 861-0400 <br /> Sincerely, ep,9FESS10 <br /> SECOR InternatValIncorporated ��Jo ti B0 _ <br /> NO C 058399 rn <br /> usty E Benkos t Expo <br /> Senior Engineer J} CML �a�Q <br /> RB/sh 4 OF CAL���� <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-Gettler-Ryan Fourth Quarter Groundwater Monitoring and Sampling <br /> Report <br /> Attachment B-Arco Fourth Quarter Certified Analytical Laboratory Reports, Chain- <br /> of-Custody Documentation, and Field Data Sheets <br /> cc Mr Ed Ralston, ConocoPhillips <br /> Mr Marty Hartzell, RWQCB- Central Valley Region <br /> 402002_OSR doc <br /> I�` <br />