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7 Eleven #14117 page 2 <br /> 2725 Country Club Blvd., Stockton CA. <br /> MW-1 and MW-2 have shown a consistent rise in groundwater contamination this <br /> year. MtBE in MW-1 has reached 9,600 ug/I on November 5, 2001, up from <br /> 7,200 ug/I on September 25, 2001 and 1,700 ug/I on May 23, 2001. Additionally <br /> MW-2 has had a significant rise in concentrations in the groundwater of TBA, <br /> now at 98,000 ug/I. Previous TBA concentrations for this well were 26,000 ug/I <br /> on May 23, 2001 and then 65,000 ug/I on September 25, 2001. These rises in <br /> contaminant levels in these wells located in the UST area could suggest a failure <br /> of the containment system. Please take immediate steps to verify that the UST <br /> system is tight. PHS-EHD UST inspectors will be contacting you to schedule a <br /> full inspection of the UST system. <br /> Please direct your submittals to Michael Infurna and you may call him at (209) <br /> 468-3454 should you have any questions. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Michael J. Infurna Jr., enior REHS Marga et Lagono, REHS <br /> LOP / Site Mitigation Unit IV Supervisor <br /> MI/ <br /> c: Barton Investment Co— "Southland", PO Box 711, Dallas, TX. 75204. <br /> c: CVRWQCB — Marty Hartzell, Sacramento. <br /> c: SWRCB-Cleanup Fund — Mark Owens, Sacramento. <br /> c: The IT Group — Shelby Lathrop, 4005 Port Chicago Hwy, Concord, 94520 <br />