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'..� 1"00 <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> �•' —aCf •Q Donna Heran,REHS <br /> 1868 East Hazelton Avenue <br /> a. ., <br /> Stockton, California 95205-6232 PROGRAM COORDINATORS <br /> s Robert McClellon, REHS <br /> Jeff Carruesco,REHS,RDI <br /> Linda <br /> Website: www.sjgov.org/ehd LFoley,RENS <br /> C i F o R Linda Turkatte,REHS <br /> Phone: (209)468-3420 <br /> Fax: (209)464-0138 <br /> July 19, 2012 <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 # 1878 <br /> Subject: 3430 EI Dorado Street S., Stockton, CA <br /> 2012 Fifth Five-Year Review Response <br /> San Joaquin County Environmental Health Department (EHD) has received and reviewed the <br /> fifth five-year review update letter dated 18 April 2012 from Kirk Larson of the State Water <br /> Resources Control Board (SWRCB) Cleanup Fund (CUF) for the above-referenced site. The <br /> CUF recommended that the EHD consider the site for closure. <br /> The site has two areas with separate releases or cases. The EHD had previously determined <br /> that the southern area was adequately characterized and that no further action was required for <br /> that case. For the second release area, the EHD has found that the lateral extent of impacted <br /> groundwater has also been adequately delineated and that the dissolved plume appears to <br /> have been reduced in mass and concentration; however the EHD notes that the monitoring <br /> results were obtained during a period of active remediation and there are closure items that <br /> have not yet been addressed. The EHD will direct cessation of active remediation, verification <br /> groundwater monitoring results, and preparation of a no further action required request report <br /> that discusses plume delineation and behavior without active remediation and includes a human <br /> health risk assessment, a vapor intrusion evaluation, and other closure criteria needed for <br /> complete closure evaluation. <br /> Questions or comments should be directed to Harlin Knoll at (209) 468-3442 or to Nuel <br /> Henderson at (209) 468-3436. <br /> Sincerely, <br /> Harlin Knoll, REHS Nuel Henderson, PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> 2012 Five-Year Review Update Response CUF Claim No 1878.doc <br />