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OP9' U ' N' Cf1V1fCc� i�i �W Cs in 14 � 11COIS� l�-� (.`�� E{ ill DIRECTOR <br /> O Donna Heran, REHS <br /> s — 600 East Main Street <br /> U); S'a®chton , California 95202 "3029 PROGRAM COORDINATORS <br /> I Robert McClellan, REHS <br /> Jeff Carruesco, REHS, RDI <br />` C4C / FORP Website: www.sjgov.org/ehd Kasey Foley, REHS <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> April 29, 2010 <br /> Messrs . Robert Trommer, CHG , and Kirk Larson , PG <br /> State Water Resources Control Board <br /> Division of Financial Assistance <br /> 1001 I Street <br /> Sacramento CA 95814 <br /> Subject: March 2010 Draft Five-Year Review Recommendations, <br /> Various Sites <br /> San Joaquin County Environmental Health Department (EHD) has received and <br /> reviewed the draft annual review five-year review update letter for various sites <br /> referenced below and comments as follows below. <br /> 2360 East Road, Tracy, CA, Claim Number 3484: You have recommended site <br /> closure consideration , with which the EHD is in agreement. The site closure process is <br /> at an advanced stage , the EHD is awaiting only certification that all investigation-derived <br /> wastes have been properly disposed . The EHD expects this site to be closed within <br /> weeks . <br /> 1876 Country Club Boulevard , Stockton , CA, Claim Number 1026: You have <br /> recommended site closure consideration this year after recommending more aggressive <br /> site remediation the two previous years . The site is in active remediation by <br /> groundwater extraction (GWE ) ; however, other than the analytical results for the <br /> extraction well samples , the remediation status and effectiveness has not been reported <br /> recently. The EHD will direct submittal of an evaluation of the remedial effectiveness . <br /> The EHD notes that the concentrations reported represent the effects of an active <br /> remediation system and anticipates that rebound testing will be the next corrective <br /> action . With favorable results , the EHD anticipates site closure within a year. <br /> 2315 N EI Dorado Street, Stockton , CA, Claim Number 417 : You concurred with the <br /> EHD directive to assess alternative remedial technologies . The consultant has <br /> recommended pilot testing of insitu air sparging ( IAS ) in a recent feasibility study. The <br /> EHD will approve this recommendation . <br /> 5-Year Reviews for March 2010 Comment Letter 0410.doc <br />