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San Joaquin County DIRECTOR <br /> Donna Heran,RENS <br /> Environmental Health Department <br /> t O M ASSISTANT DIRECTOR <br /> Z 600 East Main Street Laurie Cotulla, REHS <br /> Stockton, California 95202-3029 <br /> PROGRAM COORDINATORS <br /> • Carl Borgman,REHS <br /> Mike Huggins,REHS,RDI <br /> q4:FORa` Website: www.sjgov.orglehd Margaret Lagorio,REHS <br /> Phone: (209)468-3420 Robert McClellon,REHS <br /> Fax: (209)464-0138 ,teff Carruesco,REHS,RDI <br /> Kasey Foley,REHS <br /> January 26, 2009 <br /> Andrew Eggiman <br /> c/o Robert Eggiman <br /> PO Box 580 <br /> Mountain Ranch, CA 95246 <br /> Subject: Eggiman's Hydraulic Site Code: 1914 <br /> 1112 East Harding Way <br /> Stockton, CA 95205 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Feasibility <br /> Study Addendum (Addendum) dated January 9,_2009., submitted on your behalf by ATC <br /> Associates (ATC) and has the following comments. <br /> In the previously submitted Feasibility Study, ATC recommended use of Groundwater <br /> Extraction with Biological Treatment and Bio-Enhanced Infiltration as a final remedial <br /> technology for this site. However, discussion with the Regional Water Quality Control Board, <br /> Central Valley Region (CVRWQCB) personnel indicated that since it was not a well <br /> documented technology, additional extensive and expensive testing would be required prior <br /> to approval for use at this site. In consideration of this, and the current economic status of <br /> the Cleanup Fund, ATC recommends in the Addendum using ozone infusion to remediate <br /> this site. The EHD agrees with this recommendation. <br /> The EHD has discussed with ATC that prior to undertaking a bench scale test for ozone <br /> infusion at this site, groundwater samples should be collected and analyzed for metals that <br /> may present groundwater quality problems associated with the use of ozone infusion. These <br /> samples will be collected at the next routine quarterly groundwater monitoring and sampling <br /> event. Analytical results will then be evaluated for concentrations of dissolved metals and <br /> compared to the analytical results from a nearby site currently using ozone infusion for <br /> remediation of petroleum hydrocarbon contamination in their groundwater. This evaluation <br /> may save considerable time and expense in determining whether ozone infusion would be an <br /> applicable remedial alternative at your site. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Sincerely, <br /> I�wtnc�,v <br /> Lori Duncan, REHS Margaret Lagori0, R HS <br /> Registered Environmental Health Specialist Program Coordinator <br /> c: Jim Kundert, ATC, 1117 Lone Palm Ave, Suite B, Modesto, CA 95351 <br /> i <br />