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San Joaquin County DIRECTOR <br /> PQ u.iry Donna Heran,RENS <br /> Environmental Health Department <br /> ASSISTANT DIRECTOR <br /> �. <br /> a 600 East Main Street Laurie Cotulla,REHS <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> �. Carl Borgman,REHS <br /> cqr!F6.1 44k Mike Huggins,REHS, RDI <br /> 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 /> MAY 0 2 2007 <br /> DON PRATT <br /> ATLANTIC RICHFIELD COMPANY M HAMZEH Y HAJIAN PPT <br /> PO BOX 1257 111 QUINTAS LANE <br /> SAN RAMON CA 94583 MORAGA CA 94556 <br /> RE: Former ARCO Station #548 SITE CODE: 1127 <br /> 1612 Hammer Lane <br /> Stockton CA 95209 <br /> In correspondence dated February 9, 2007 San Joaquin County Environmental Health <br /> Department (SJC/EHD) directed you to submit a work plan to continue the investigation <br /> of the lateral extent of the groundwater contamination at the above referenced <br /> contaminated underground storage tank site. The work plan was due no later than <br /> April 27, 2007 but has not been received by this agency. <br /> Please proceed with submittal of the required work plan. If a work plan is not received <br /> within 14 days of the date of this letter, this site may be referred to the San Joaquin <br /> County District Attorney's office or the Regional Water Quality Control Board, Central <br /> Valley Region (CVRWQCB) for enforcement action. <br /> You were notified in the same correspondence that Revised Work Plan for Biosparging <br /> Feasibility Testing dated December 19, 2006, submitted on your behalf by SECOR <br /> International Incorporated (SECOR), was conditionally approved for implementation. <br /> SJC/EHD has not been notified that the work proposed by SECOR has begun. Final <br /> date for implementation of the approved biosparging test is June 29, 2007. <br /> If you have any questions please call Lori Duncan at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Lori Duncan, Senior REHS Margaret Lagorio, REHS <br /> LOP/Site Mitigation Unit IV Program Coordinator, Unit IV <br /> CC' James Barton, PG, CVRWQCB <br /> Rusty Benkosky, PE, SECOR <br />