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Department of Toxic Substances Control . <br /> Maureen F. Gorsen, Director <br /> Linda S.Adams 4rnotd-Schwarzenegger <br /> Secretary for 8800 Cal Center Drive u U C L��V �&vernor <br /> Environmental Protection Sacramento, California 95826-3200 � v �U <br /> June 14, 2006 JUN 1 6 2006 <br /> ENVIRONMENT HEALTH <br /> PERMI USERVICES <br /> Mr. Jim Levy, Manager <br /> Environmental Site Remediation <br /> Union Pacific Railroad <br /> 9451 Atkinsons Street, Suite 100 <br /> Roseville, California 95747-9711 <br /> COMMENTS ON THE DRAFT PHASE 1 REMEDIAL INVESTIGATION REPORT, <br /> FORMER TRACY RAILYARD, TRACY, CALIFORNIA <br /> Dear Mr. Levy: <br /> The Department of Toxic Substances Control (DTSC) has reviewed the Draft Phase 1 <br /> Remedial Investigation Report (Report) prepared for the Union Pacific Railroad <br /> Company, Former Tracy Railyard in Tracy, California (Site). The Site is approximately <br /> 34 acres and is located at 780 E. Sixth Street, Tracy, California. Adjacent areas are a <br /> mix of commercial and residential development. The Site was used as a maintenance <br /> facility by Southern Pacific Transportation Company until 1940s when it was converted <br /> to a rail welding facility. All operations had ceased and a majority of the structures and <br /> railroad tracks were removed in the 1980's. The Site is currently vacant. The Site has <br /> been divided into five Operable Units (OUs) for effectively manage investigate and <br /> remediation of the Site. The planned investigation varies depending on past activities at <br /> each OU, as well as current and anticipated future land uses. Soil samples were <br /> collected from all OUs and groundwater samples were collected in OU 2 and OU 5 <br /> during the remedial investigation. <br /> Under the terms of the Voluntary Cleanup Agreement (VCA) (Docket #HSA-A 04/05- <br /> 188), Union Pacific Railroad has submitted a draft Report summarizing the nature, <br /> source, and extent of contamination. DTSC has the following comments which should <br /> be addressed in a revised Report. <br /> General Comments: <br /> Include discussions regarding analysis, hot spots, minimum/maximum concentrations <br /> encountered. Include an iso-concentration map for each contaminant/group, such as <br /> metals (i.e., lead, arsenic, etc.) <br /> 0 Printed on Recycled Paper <br />