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100 Pine Street. 1 Oth Floor <br /> San Francisco, CA 94111 GEOMATRIX <br /> 04151 434-9400 • FAX (4151 434-1365 <br /> 30 October 1996 <br /> Project No. C3603-H <br /> Mr. Stephen DiZio, Ph.D. <br /> Office of Scientific Affairs <br /> Department of Toxic Substances Control <br /> 301 Capitol Mall, Third Floor <br /> Sacramento, California 95812-0806 <br /> Subject: Refined Risk Evaluation Work Plan Appendix C <br /> Alden Park Site <br /> Tracy, California <br /> Dear Mr. DiZio: <br /> It has come to our attention that the attachments for Appendix C to the Refined Risk <br /> Evaluation Work Plan submitted to you on 26 September 1996 were not included. Please find <br /> enclosed a copy of Table C-1 and the spreadsheet calculations used to support the selection of <br /> the appropriate Preliminary Remediation Goal for selecting chemicals of potential concern in <br /> soil. <br /> If you have any questions or require any additional information, please call me at(415) 434- <br /> 9400. <br /> Sincerely, <br /> G AT NSULTANTS, INC. <br /> ory P. Brorby, DABT <br /> Senior Toxicologist <br /> GPB/pp <br /> K:\PUBLIC\C3603\APPCLTR.D0C <br /> Enclosure <br /> cc: Katie L. Hower - Chervron Pipe Line Company <br /> Michael Infama- San Joaquin Valley - Public Health Services <br /> Joel Weiss - Regional Water Quality Control Board- Central Valley Region <br /> G®omatrix Consultants, Inc. <br /> Engineers,Geologists,and Environmental Scientists <br />