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ChemRhssh <br /> A Division of McLaren/Hart <br /> Environmental Engineering <br /> 100 North First Street, Suite 210 <br /> Burbank, CA 91502 <br /> (818) 841-0606 <br /> FAX (818) 841-0896 <br /> May 26, 1993 <br /> Mr. Harlin Knoll, REHS . <br /> Environmental Health Specialist <br /> San Joaquin County Public Health Services <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> Re: Risk Assessment for the Santa Fe Railway Company Site in Stockton, California <br /> Dear Mr. Knoll: <br /> ChemRisk® is pleased to present three copies of the Risk Assessment for the Santa Fe <br /> Railway Company Site in Stockton, California. <br /> The results of the fate and transport evaluation show that the hydrocarbons in the site soil <br /> have only a limited migration potential. Using conservative assumptions, the petroleum <br /> hydrocarbons were predicted to migrate less than one foot over a 99-year period. Therefore, <br /> ChemRisk®concludes that the presence of the petroleum hydrocarbons in soil beneath the site <br /> can safely remain in place because they do not pose a threat to either groundwater resources <br /> or human health. <br /> I would like to meet with you to discuss the risk assessment and will call you next week to set <br /> up an appointment. Should you have any questions in the meantime, please do not hesitate <br /> to contact Tina Deseran, John Stellar, or me at (818) 841-0606. <br /> Sincerely, <br /> Michael J. Sullivan, Ph.D. <br /> Principal Health Scientist <br /> G:\0600717\52693W2.1VVcss105.26.93 <br /> Enclosures <br />