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iTATE OF CALIFORNIA-Environmental Protecti ency - PETE WILSON,Govemor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> 3443 Routier Road,Suite A <br /> Sacramento,CA 95827-3098 --- <br /> PHONE:(916)255-3000 <br /> FAX:(916)255-3015 1.1 ra <br /> 20 April 1995 APR 2 1 1995 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Mr. Randy Smith <br /> Southern Pacific Transportation Company <br /> One Market Plaza <br /> San Francisco, CA 94105 <br /> LEAD CLEANUP LEVEL IN SOILS, SOUTHERN PACIFIC TRANSPORTATION <br /> COMPANY, OLD TRACY YARD, SAN JOAQUIN COUNTY <br /> This letter is to confirm our 30 March 1995 phone conversation regarding lead cleanup levels in <br /> soil at Southern Pacific's old Tracy Yard. In my 21 April 1994 letter, I approved your work plan <br /> to excavate lead contaminated soils to a maximum level of 500 mg/kg which may be appropriate <br /> for the protection of water quality. However, I also stipulated that the cleanup level may have to <br /> be lower because of two factors. First, additional analyses for soluble lead might show that 500 <br /> mg/kg is not protective of water quality, and second, the Department of Toxic Substances <br /> Control (DTSC) may not accept this level as being protective of public health. <br /> We have recently been informed by DTSC that a maximum cleanup level of 220 mg/kg will be <br /> required (see attached DTSC printout). Therefore, it is the Board's position, notwithstanding <br /> higher than expected soluble lead concentrations, that lead in the soil at the old Tracy Yard shall <br /> be cleaned up to 220 mg/kg. <br /> If you have any questions, you may call me at(916) 255-3077. <br /> VELM. WEISS <br /> Engineering Geologist <br /> JMW:j mw/lsb <br /> Attachment <br /> cc: Mr. Eric Garcia, Department of Toxic Substances Control, Sacramento <br /> San Joaquin County Department of Public Health Services, Stockton <br /> Industrial Compliance, Sacramento <br />