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Ed Ralston --ConocoPhillips page 2 <br /> 1502 N EI Dorado St , Stockton <br /> EHD has researched the ARCO site's deep well construction details and found <br /> that the wells, "DW-1" and "DW-2", are screened at the same depths as the CP <br /> deep wells EHD was unable to confirm a subsurface link between the sites In <br /> the future provide a southwest-northeast subsurface cross section that spans <br /> from ARCO's most southwest data point to CP's most northeast data point The <br /> section should pass through both site's petroleum plume Please include the <br /> most current soil and ground water data from the recently installed ARCO "EW" <br /> and "DW" series wells, in addition to all existing CP data points <br /> EHD appreciates the detail and effort put into completing this SCM As additional <br /> subsurface investigations are completed for the CP site, please include the <br /> findings in an updated SCM Conclusions for delineation should be supported by <br /> sod and/or ground water data collected from all areas of concern Where no data <br /> exists, additional proposals for their collection should be submitted to EHD <br /> Thank you for your continued cooperation and please continue to contact <br /> Michael Infurna at (209) 468-3454 if you have any questions or wish to discuss <br /> the site You may contact Mr Infurna by electronic mail at mmfurna s cehd com <br /> Donna Heran, RENS, Director <br /> Environm ntal Health Department <br /> Michael J Infurna Jr , enior REHS 7arg`=reeagor`io,--AHS <br /> LOP 1 Site Mitigation Unit IV Supervisor <br /> c CVRWQCB --Jim Barton, Sacramento <br /> C SWRCB—CUF — Mark Owens, Sacramento <br /> C Secor— R Benkosky, 3017 Kilgore Rd, #100 Rancho Cordova, 95670 <br />