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San Joaquin County DIRECTOR <br /> Environmental Health Department Donna Heran,REHS <br /> �o co p ASSISTANT DIRECTOR <br /> �2r "z 600 East Main Street Laurie Cotulla,REHS <br /> #, Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> •' Carl Borgman,REHS <br /> Mike Huggins,REHS,RDI <br /> C��%FORa`P Website: www.sjgov.org/ehd 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 /> MR RUSSEL CHAPIN SEP li 0 2007 <br /> CHAPIN BROTHERS, INC <br /> 1203 N CARLTON AVE <br /> STOCKTON CA 95203 <br /> RE: CHAPIN BROTHERS Site Code: 0850 <br /> 1766 MONTE DIABLO AVENUE <br /> STOCKTON, CA <br /> The San Joaquin County Environmental Health Department (EHD) has received <br /> and reviewed Groundwater Extraction — Work Plan — Treatment System (WP), <br /> dated 20 August 2007, prepared by Advanced GeoEnvironmental, Inc. (AGE). In <br /> WP, AGE proposes to install pumps into the new groundwater extraction wells, <br /> replace worn pumps in older extraction wells if needed, and integrate the new <br /> wells into the existing groundwater extraction system for continuous operation. <br /> Operation and monitoring of the expanded groundwater extraction will be as <br /> proposed in Remedial Action Work Plan Addendum (RAWPA) dated 28 June <br /> 2001. The EHD approves the proposals in the WP. Reinitiate operation of the <br /> groundwater extraction and treatment system no later than 02 January 2008; <br /> report on the operation and maintenance of the system in the quarterly reports. <br /> Questions and/or comments may be directed to Nuel Henderson at <br /> (209) 468-3436. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Nuel C. Henderson, Jr., PG Margare Lagorio, 17H; <br /> Engineering Geologist / Program Coordinator <br /> Unit IV, LOP Unit IV, LOP <br /> C: Mr. James L.L. Barton — CVRWQCB <br /> Mr. Dennis Parfitt - SWRCB <br /> Mr. William Little - AGE <br /> Supervisor Victor Mow— San Joaquin County Board of Supervisors <br />