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California R nal Water Quality f�rltrol Board "``'. <br /> Central Valley Region 1 <br /> Peter M.Rooney Sacramento Main Office Ed J.Schnabel <br /> Secretaryfor Internet Address: http://www.swmb.m.gov/—mgcb5/home.html Chair <br /> Envirrmmental 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Protection Phone(916)255-3000•FAX(916)255-3015 <br /> r'n <br /> 29 September 1998 <br /> Mr. Nick Nickerson <br /> Unocal Asset Management Group <br /> 2121 North California Blvd., Suite 250 <br /> Walnut Creek, CA 94596 <br /> HEALTH RISK ASSESSMENT WORK PLAN, WESTERN FARM SERVICE (FORMER <br /> PUREGRO/BREA), STOCKTON, SAN JOAQUIN COUNTY <br /> Thank you for meeting with me and Wendy Cohen on 3 September to discuss the status of the <br /> investigation and remediation at the former PureGroBrea Ag facility at 1905 N. Broadway Avenue in <br /> Stockton. During the meeting,concerns were raised about the March 1998 Risk Assessment Work Plan <br /> and the 29 June 1998 review memorandum prepared by the Office of Environmental Health Risk <br /> Assessment (OEHHA; enclosed). In response,I have reviewed the documents and have met with Dr. <br /> Julio Salinas of OEHHA. My specific comments regarding the work plan are found in the enclosed <br /> memorandum. <br /> I believe that health risk assessments are best completed in small increments, with each step reviewed <br /> and approved by the appropriate agencies. This approach usually alleviates the need for major revisions <br /> to the final health risk assessment document. Accordingly, the next step in this process is the submittal <br /> of(a) a response to the two enclosed memoranda, (b) a tabulation of all data to be used in the health risk <br /> assessment, and (c) a final conceptual site model describing all exposure routes and potential receptors <br /> to be addressed in the risk assessment. Please submit this information by 1 December 1998. <br /> If you have any questions, or wish to meet to discuss these issues, please contact me by telephone at <br /> (916) 255-3080 or by e-mail at wyelsw@rb5s.swrcb.ca.gov. <br /> "wv�� <br /> WENDY WYELS <br /> Site Cleanup Unit <br /> Enclosure (2) <br /> cc w/enc.: Dr. Julio Salinas, OEHHA, Sacramento <br /> Mr. Mike Infuma, San Joaquin County Environmental Health Department, Stockton <br /> Mr. Eric Chase, Sierra Pacific Groundwater Consultants,Inc., El Dorado Hills <br /> Dr. Lee Shull, Davis <br /> Ms. Nancy Bishop,Western Farm Service,Lafayette <br /> Mr. Jan Waggoner, Unocal,West Sacramento <br /> California Environmental Protection Agency <br /> �d Recycled Paper <br />