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�`�IV <br /> San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> pP-_ co r" Donna Heran,REHS <br /> 2 2 600 East Main Street <br /> PROGRAM COORDINATORS <br /> h Stockton, California 95202-3029 Robert McClellon, REHS <br /> Jeff Carruesco, REHS, RDI <br /> Kasey Foley, REHS <br /> Website: www.sjgov.org/ehd Linda Turkatte, REHS <br /> 4c)F°aa Phone: (209)468-3420 <br /> Fax: (209)464-0138 <br /> December 29, 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 <br /> Subject: 1201 Center Street S., Stockton, CA <br /> 2011 Annual 5-Year Review Update Response CUF Claim No 12186 <br /> San Joaquin County Environmental Health Department (EHD) has received and reviewed the <br /> fourth annual five-year review update letter dated 07 November 2011 from Kirk Larson of the <br /> State Water Resources Control Board (SWRCB) Cleanup Fund (CUF) for above-referenced <br /> site. the CUF recommends that the EHD direct the responsible party (RP) to assess remedial <br /> technologies and implement active remediation without delay. <br /> The EHD concurs with the CUF that another remedial technology should be implemented at the <br /> site. The soil vapor extraction system operation has lost effectiveness due to low vapor <br /> recovery, possibly associated with elevated groundwater level. The EHD has been discussing <br /> implementation of dual phase extraction (DPE) on the site with the RP's consultant. At this time <br /> it is tentatively planned to suspend the $VE operation and minimize monitoring to focus on <br /> installing the infrastructure of the DPE system. The consultant plans to purchase the extraction <br /> unit and initiate its operation with next year's CUF reimbursement allocation. This plan involves <br /> some delay, although the consultant has reportedly put in a change order to attempt to increase <br /> this year's CUF allotment. <br /> Questions or comments should be directed to Mike Infurna at (209) 468-3454 or to Nuel <br /> Henderson at (209) 468-3436. <br /> Sincerely, <br /> Nuel Henderson, PG <br /> Engineering Geologist <br /> 2011 Annual 5-Year Review Update Response CUF Claim No 12186.doc <br />