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p <br /> �. rAll <br /> A <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heran, REHS <br /> 600 East Main Street <br /> Stockton , California 95202-3029 PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> 3 <br /> Jeff Carruesco, REHS, RDI <br /> C . �- Kasey Foley, REHS <br /> Q <. < F O Ra` Website: www.sjgovorg/ehd Linda Turkatte, REHS <br /> Phone: (209) 468-3420 <br /> Fax: (209) 4640138 <br /> August 9, 2011 <br /> Messrs . Kirk Larson, PG , and Robert Trommer, CHG <br /> State Water Resources Control Board <br /> Division of Financial Assistance <br /> 1001 1 Street <br /> Sacramento CA 95814 CUF Claim No . 1696 <br /> Subject: 2050 Fremont Street E , Stockton , CA <br /> Annual Five-Year Review Update Recommendations June 2011 <br /> The San Joaquin County Environmental Health Department (EHD) has received and reviewed <br /> the annual five-year review update letter dated 28 June 2011 from Kirk Larson of the State <br /> Water Quality Control Board (SWQCB) Cleanup Fund (CUF) for the above-referenced site. The <br /> CUF recommends that the EHD direct the Responsible Party (RP) to assess other remedial <br /> technologies, including sparging, to determine the most cost-effective approach to achieve <br /> water quality objectives (WQOs) in a timely manner. <br /> Between 29 December 2010 and 04 January 2011 , mixed compounds were injected in targeted <br /> zones to remediate impacted groundwater through insitu chemical oxidation ; three monitoring <br /> events culminating on 16 February 2011 , did not document any significant decrease of <br /> dissolved contaminants, in fact several had increased beyond previously detected <br /> concentrations ; dissolved oxygen concentrations were not reported. No data acquired after 16 <br /> February 2011 has been submitted or reported the EHD . It would appear that the employed <br /> technology is ineffective and the EHD will issue a directive as recommended by the CUF. <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) 468-0337 or to Nuel Henderson at (209) 468-3436 . <br /> Sincerely, <br /> Lori Duncan , REHS Nuel Henderson , PG <br /> Senior Registered Environmental Engineering Geologist <br /> Health Specialist <br /> 2011 Five-Year Review Comment Lefler 2050 E Fremont 0811 .doc <br />