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San Joaquin County <br /> " . Environmental Health Department DfRE <br /> �G DonnnaaHeran, REHS <br /> Q' <br /> J--� �--y 1868 East Hazelton Avenue <br /> Z� PROGRAM COORDINATORS <br /> N: Stockton, California 95205-6232 <br /> Robert McClellon,REHS <br /> Jeff Carruesco, REHS,RDI <br /> Kasey Foley,REHS <br /> P Website: www. <br /> sjgov.org/ehd Linda Turkatte, REHS <br /> cq�iFo> <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> September 6, 2012 <br /> Mr. Dung Thanh Phan and Ms. Nhuan Thi Phan <br /> 3524 Morningside Drive <br /> Stockton, California 95219 <br /> Subject: California Stop <br /> 2224 Manthey Road <br /> Stockton, California 95206 <br /> Dear Mr. and Ms. Phan: <br /> By email dated 28 August 2012, your consulting firm, Advanced GeoEnvironmental, Inc. (AGE), <br /> requested that the San Joaquin County Environmental Health Department (EHD) reconsider <br /> their recommendation to delay the ozone pilot test and presented the following reasons why the <br /> ozone pilot study should be implemented at this time: <br /> • Soil vapor extraction (SVE) remediation does not address soil contamination at depths of <br /> approximately 20 to 25 feet below surface grade (bsg) where significant concentrations <br /> of contaminants of concern have been detected; and <br /> • SVE remediation does not address the high concentration of dissolved-phase petroleum <br /> hydrocarbon contamination present at this site. <br /> The EHD has reconsidered its decision to delay the ozone pilot test and approves submitting a <br /> work plan that includes the implementation of the ozone pilot study as well as the installation of <br /> a soil vapor extraction (SVE) system. AGE has requested and the EHD approves extending the <br /> date for receiving the work plan from 12 September 2012 to 30 September 2012. <br /> Please contact Vicki McCartney at (209) 468-9852 or by email at vrnccartneyCd)sicehd.com if <br /> you have any questions concerning this letter. <br /> Sincerely, / <br /> �'✓. Nuel C. enderson, Jr. <br /> Victoria L. McCartney, REHS <br /> Senior Registered Environmental Health Specialist Engineering Geologist , PG <br /> c: Mr. Timothy J. Cuellar, Advanced GeoEnvironmental, Inc., 837 Shaw Road, Stockton, <br /> California 95215 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br />