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�.,. San Joaquin County DIRECTOR <br /> Apu�N Donna Reran,REBS <br /> .,Environmental Health Departmnt <br /> A` <br /> z b :2 eASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Caiulla,RENS <br /> Stockton, California 95202-3029 PROGRAIE?COORDINATORS <br /> .•�P Carl Sorgman,REHS <br /> z Mike Hudgins,REHS,RDI <br /> Website: www-sjgov.org/ehd Margaret;Lagorio,REHS <br /> Phone: (209) 468-3420 Robert MCClellon,RENS l <br /> Fax: (209)464-0138 Jeff Carruesco;REHS,RDI <br /> Kasey Foley,REHS <br /> DON PRATT MAY Q � �p i <br /> ARCO PRODUCTS COMPANY <br /> PO BOX 12.57 <br /> i SAN ,RAMON CA 94583 <br /> RE: ARCO Station #6080 SITE CODE: 0712 <br /> 85 Louise Avenue <br /> Lathrop CA 95330 <br /> -in correspondence dated June 1, 2006 San Joaquin County Environmental Health <br /> Department (SJC/EHD) informed you that to continue their review for closure of the l <br /> above referenced contaminated underground storage tank site the Regional Water <br /> Quality Control Board, Central Valley Region (CVRWQCB) requested an assessment F ' <br /> of the soil contamination remaining at the site for vapor emissions, direct exposure and <br /> gross contamination. Concentrations of xylenes and total petroleum hydrocarbons as <br /> gasoline (TPHg) in the shallow soil near the dispenser islands at this site exceed the. <br /> San Francisco Bay Regional Water Quality Control Boards Tier I Environmental <br /> Screening Levels (ESL's)for evaluation of the risk posed from remaining soil and <br /> groundwater contamination. <br /> Please proceed with preparation of the assessment and submit it to SJC/EHD and the. <br /> CVRWQCB no later than June 29, 2007. Include in the assessment a discussion of <br /> the expected long-term use of the site, which addresses specifically that use of the j <br /> land will limit the risk from the residual contamination, i.e. ARCO expects the site to be <br /> an operating gas station for the foreseeable future: <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Lori Duncan, Senior REHS Margare agorio, REHS <br /> LOP/Site Mitigation unit IV Program Coordinator Unit IV j <br /> cc: James Barton, CVRWQCB <br /> Rusty Benkosky, Secor International Inc. <br /> MAY ':;0:;G 2007 <br /> L <br />