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E <br /> San Joaquin County <br /> "" = c Envi!' �7Y�11�ntal Health DepartmentDIRECTOR <br /> O Donna Heran,RENS <br /> z' -- 600 East Main Street <br /> PROGRAM COORDINATORS <br /> Stockton, California 95202®3029 Robert Mcclellon,REHs <br /> ''-: '• Jeff Garruesco, REHs,RDI <br /> Website: www.sjgov.orglehd Kasey Foley,REHs <br /> Linda Turkatte,RENS <br /> Phone: (209)4683420 <br /> Fax: (209)464-0138 i <br /> May 16, 2011 <br /> Messrs. Kirk Larson, PG, and Robert Trommer, CHG <br /> State Water Resources Control Board i <br /> Division of Financial Assistance <br /> 10011 Street <br /> Sacramento CA 95814 <br /> Subject: 2450 Toste Road,Tracy, CA CUF Claim# 12228 <br /> Five-Year Review Recommendations March 2011 <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> the first five-year review letter dated 03 March 2011 from Kirk Larson of the State Water Quality <br /> Control Board (SWQCB) Cleanup .Fund (CUF) for the above-referenced site. The CUF <br /> recommends that the EHD consider the site for closure. <br /> Contaminants in two monitoring welis have been relatively elevated in the core area since June <br /> 2008; benzene commonly the more concentrated volatile organic compound. Ozone sparging <br /> wells have been recently Installed on the site and it is planned to move an ozone generator onto <br /> the site in the near future to conduct a six-month extended pilot test, which may reduce the k <br /> residual contaminant concentrations in the area. As preparations for initiating the pilot test are in <br /> progress, the 'EHD requests` that the CUF reconsider the closure recommendation until the is <br /> ozone sparge test has been completed: <br /> If the EHD can be of further service to you, your requests, questions and/or comments should <br /> be directed to Lori Duncan at(209)468-0837 or to Nuel Henderson at (209)468-3436. <br /> Sincerely, # <br /> Lori Duncan, REHS Nuel Henderson, PC t <br /> Senior Registered Environmental Engineering Geologist <br /> Health Specialist <br /> i <br /> t. <br /> r <br /> i <br /> First Five-Year Review Comment Letter 2011,ddc <br />