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. i <br /> August 24,.2010 <br /> Lori Shields <br /> Diesel Performance <br /> 2804 Fremont Street , <br /> Stockton CA 95205 <br /> Subject: Diesel Performance <br /> 2804 Fremont Street <br /> Stockton, CA 95205 <br /> III In correspondence dated May 6, 2010, the San Joaquin County Environmental Health <br /> Department (EHD) notified you that review of Groundwater Monitoring and System <br /> Operation Report - First Quarter 2010 (Report) dated April 21, 2010, submitted on your <br /> behalf by ATC Associates, Inc. (ATC) was complete, and directed.you.to submit a closure <br /> report that contained the following items: <br /> 1. A calculation of contaminant mass remaining in both soil and groundwater. <br /> 2. A prediction of how long, in years, "it will be until the dissolved contaminant <br /> concentrations on site reach water quality objectives. <br /> 3. A review of the potential threat from vapor intrusion from the remaining <br />; contamination in both soil and groundwater. If it is considered that vapor sampling <br /> must be done, please provide a work-plan to do it. <br /> 4. Confirmation that a sensitive receptor survey has been completed. <br /> 5. All other requirements of the Tri-Regional Guidelines Appendix A. <br /> rt has not been received b this, agency. Please <br /> The requested report Y . proceed with <br /> q <br /> p <br /> i preparation and submittal of the report. The deadline for submittal is October 8, 2010. <br /> If you have any questions please^contact Lori Duncan at (209) 468-0337, or by email at <br /> Iduncan@sjcehd.com. <br /> r FILESincerely, Copy <br /> Lori Duncan, REHS Adrienne Ellsaesser, REHS <br /> Senior Registered Environmental Health Specialist Acting Program Coordinator <br /> g . <br /> c: Jim Barton, PG, CVRWQCB, 11020 Sun Center Dr. #200, Rancho Cordova, CA 95670 <br /> Jeanne Homsey, PE, ATC, 1117 Lone Palm Avenue,#201, Modesto, CA 95351 <br /> { <br />