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San Joaquin County DIRECTOR <br /> -6 U i N..., Donna Heran,REHS <br /> Environmental Health Department ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla,REHS <br /> m < <I Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> ---- Cad Bergman,REHS <br /> Website: www.s ov.or 1ehd Mike Huggins, REHS,RDI <br /> C4�i 19 9 Margaret Lagorio, REHS <br /> Phone: (209) 468-3420 Robert McClellon,REHS <br /> Fax: (209) 464-0138 Jeff Carruesco, REHS,RDI <br /> Kasey Foley,REHS <br /> 21 July 2008 <br /> Messrs. Robert Trommer, CHG, and Kirk Larson, PG <br /> State Water Resources Control Board <br /> Division of Financial Assistance <br /> 1001 1 Street <br /> Sacramento CA 95814 <br /> Subject: Preliminary Five-Year Review Letters <br /> San Joaquin County Environmental Health Department (EHD) has received and <br /> reviewed ten preliminary five-year review letters each with your request to convey the <br /> EHD's agreement or disagreement with the site-specific recommendations. The EHD <br /> comments for those sites are provided herein. Due to the high volume of preliminary <br /> five-year review letters and the ongoing workload and commitments of the EHD, the <br /> following comments pertain only to the recommendations; other information in the five- <br /> year letters that is incorrect or incomplete is noted only insofar as that information <br /> directly affects the recommendations. <br /> 3032 Waterloo Road <br /> The State Water Resources Control Board Cleanup Fund Five Year Review <br /> Committee (CUF) recommends that the EHD direct the Responsible Party (RP) <br /> to assess the effectiveness of the current treatment systems and consider adding <br /> additional treatment technologies to achieve Water Quality Objectives (WQOs) <br /> more quickly. The END concurs with the CUF's preliminary letter dated 30 May <br /> 2008. Four new extraction wells were installed approximately 10 months ago, but <br /> the wells have not been put on line. Also five cone penetration test (CPT) borings <br /> have been approved to investigate the vertical and lateral extent of impacted <br /> groundwater in the down-gradient direct; the work is pending. One deep and <br /> three shallow monitoring wells have been installed to further delineate impacted <br /> groundwater toward the west as was recommended by the CUF. <br /> 574 Grantline Road, W. <br /> • The CUF concurs with the EHD that ozone sparging should continue and the <br /> treatment system should be maximized to achieve WQOs in a timely manner. <br /> The ozone generator is fully utilized for 10 injection points; the EHD will direct the <br /> RP to evaluate the effectiveness of the current application on a point by point <br /> basis and redirect the application as may be appropriate to maximize the <br /> effectiveness of the application. <br /> 5-Year Review Comment Letter 072108.doc <br />