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PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> �../ Karen Furst,M.D.,M.P.H., Health Officer •` '• <br /> 304 East Weer Avenue,Third Floor•Stockton, CA 95202 ; <br /> 209/468-3420 <br /> MICHELLE NOKES <br /> ANTIOCH TOYOTA <br /> 1810 SOMERSVILLE ROAD <br /> ANTIOCH CA 94509 <br /> ,r RE: DISCOVERY CHEVROLET SITE CODE: 2595 <br /> 1615 W 11T" STREET <br /> TRACY CA 95376 <br /> San Joaquin County Public Health Services, Environmental Health Division <br /> L (PHS/EHD) has reviewed the Corrective Action Plan (CAP) dated June 5, 1998 <br /> prepared by Horizon Environmental Inc. <br /> V . <br /> The CAP proposes excavating approximately 450 cubic yards of contaminated <br /> soil containing benzene above 5 parts per million (ppm) as the selected remedial <br /> w.. alternative for the above referenced site. The excavated soil would then either <br /> a. be transported for disposal to an approved Class it or III landfill, or be spread on <br /> an impermeable surface for aboveground onsite aeration treatment. <br /> Groundwater will be extracted from the excavation and properly disposed. Two <br /> quarters of groundwater sampling will be performed to verify the effectiveness of <br /> the remedial work. <br /> Disposal options for the extracted groundwater are discharge to storm or sanitary <br /> sewer or transport to a disposal facility. Please be advised that discharge to the <br /> sewer requires permission from the City of Tracy and that discharge to the stomp <br /> drain requires obtaining a NPDES permit from the Central Valley Regional Water <br /> Quality Control Board. If the water is taken to a disposal facility, receipts must <br /> be provided to PHS/EHD. <br /> If the contaminated soil is taken to a landfill, reosipts must be provided to <br /> PHS/EHD. If the soil is aerated on site permission from the Central Valley <br /> Unified Air pollution Control District must be obtained. <br /> PHS/EHD will conduct public notification Informing local residents of the <br /> proposed activities contained in the CAP. A 30 day period is given to allow for <br /> V <br /> `y A Division of San]O&quin County Hed&Cue Services <br /> rr <br />