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i <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> r•' --� ? 1868 East Hazelton Avenue <br /> Q: -1 PROGRAM COORDINATORS <br /> N: < Stockton, California 95205-6232 <br /> Robert McClellon,REHS <br /> Jeff Carruesco,REHS,RDI <br /> r ' Kasey Foley,REHS <br /> Website: www.sjgov.orglehd Linda Turkatte,REHS <br /> /FOR Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> September 12, 2012 <br /> Andrew Eggiman <br /> c/o Robert Eggiman <br /> PO Box 580 <br /> Mountain Ranch, CA 95246 <br /> Subject: Eggilman's Hydraulic <br /> 1112 East Harding Way <br /> Stockton, CA 95205 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Ozone <br /> Treatability Testing Report (Report) dated June 8, 2012 submitted on your behalf by ATC <br /> Associates, Inc. (ATC).- -ATC-recommended additional--ozone- sparging to remediate <br /> petroleum impacted groundwater at the site. However, the site may be a candidate for <br /> closure under the new Low Threat Closure Policy (LTCP) that.was recently adopted and <br /> implemented. If you and your consultant agree this may be so, please provide <br /> documentation to the EHD that the site meets all criteria for closure under the LTCP by <br /> November 13-2012. <br /> If you wish to have your site considered for closure under the LTCP, please provide a closure <br /> report that includes the following: <br /> 1. A calculation of the residual contaminant mass both sorbed in soil and dissolved in <br /> groundwater. <br /> 2. A prediction of how long (in years) it will be until the dissolved contaminant <br /> concentrations on site decline to reach water quality goals. <br /> 3. A discussion of the potential vapor intrusion threat from the residual contamination in <br /> both soil and groundwater. <br /> 4. Confirmation that a sensitive receptor survey has been completed for this site with a <br /> brief summary of findings and reference to the'report, and <br /> 5. All requirements of the Tri-Regional Guidelines.Appendix A. <br /> If you have any questions please call Lisa Medina at (209) 468-3455, or by email <br /> ImedinaCuD-sicehd.com. <br /> Lisa Medina, REHS Nuel C. Henderson Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist j <br /> c: James Barton, CVRWQCB, 11020 Sun Center Drive#200, Rancho Cordova, CA 95670 <br /> Jeanne Homsey, ATC, 1117 Lone Palm Ave, Suite B, Modesto, CA 95351 <br />