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i <br /> San Joaquin County DIRECTOR <br /> oP ' . . . . . . . Environmental Health Department Donna Heran, REHS <br /> ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla, REHS <br /> " < Stockton , California 95202 -3029 PROGRAM COORDINATORS <br /> Mike Huggins, REHS, RDI <br /> cq • • ' \P . OV. Or /ehd Margaret Lagorio, REHS <br /> Websife: WWWSIg g Robert McClellon, REHS <br /> Phone : (209) 468-3420 Jeff Carruesco, REHS, RDI <br /> Fax: (209) 464=0138 Kasey Foley, REHS <br /> July 24 , 2009 <br /> Foppiano Investments <br /> Ernest Foppiano <br /> 5313 Knox Drive <br /> Linden , CA 95236 <br /> Subject : Stockton City Taxi Service Site Code : 1117 <br /> 2085 Fremont Street <br /> Stockton, CA 95205 <br /> San Joaquin County Environmental Health Department ( EHD) has reviewed Ozone Pilot <br /> Testing Work Plan (Work Plan) dated June 25, 2009, submitted on your behalf by ATC <br /> Associates Inc. (ATC) and has the following comments. <br /> In the Work Plan ATC proposes the installation of two ozone infusion points and conducting <br /> a four week long insitu ozone infusion pilot test. An ozone bench scale test conducted for <br /> this site indicated that while ozone infusion would be an effective remedial method to reduce <br /> the mass of petroleum hydrocarbon contamination at the site , it may also result in the <br /> production of hexavalent chromium in the groundwater. During the proposed ozone pilot test <br /> the site will be closely monitored for the production of hexavalent chromium and evasive <br /> action will be taken if it is produced and/or does not attenuate . <br /> The EHD approves the proposal to conduct an ozone infusion pilot test as outlined in the <br /> work plan . Please proceed with submittal of a San Joaquin County Well Permit Application , <br /> required $89. 00 permit fee and $345. 00 permit inspection fee, and with scheduling the <br /> approved work. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Sincerely, <br /> ccrt� � corms =argarteto®rio, <br /> Lori Duncan , Senior REHS REHS <br /> Senior Registered Environmental Health Specialist Program Coordinator <br /> c: James Barton , CVRWQCB, 11020 Sun Center Drive #200 , Rancho Cordova , CA 95670 <br /> Jeanne Homsey, ATC , 1117 Lone Palm Avenue Suite B, Modesto CA 95351 <br />