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1 <br /> From Science to Solutions- <br /> H PP-Hl'R MP L,220,27/223.4 <br /> Mountain House Development Reports <br /> DCN:C20-SAI-Mountain-House-068956 <br /> February 1, 2006 <br /> Mr. M. Scott Mansholt <br /> Chevron Environmental Management Company <br /> 6001 Bollinger Canyon Road,Room K2066 <br /> P.O. Box 6012 <br /> San Ramon, California 94583-2324 <br /> Subject: Site Investigation Work Plan Addendum <br /> Mountain House Development, Mountain House Site #6 <br /> Mountain House, California <br /> Dear Mr.Mansholt: <br /> In a letter dated April 13, 2005, the California Regional Water Quality Control Board—Central Valley <br /> Region approved SAIC's March 31, 2005 Site Investigation Work Plan for Mountain House Site#6. <br /> SAIC has since determined that two soil borings shown on Figure 2 of the work plan, and described in the <br /> work plan scope of work, were omitted from"Table 1: Proposed Boring Objectives"of the work plan. <br /> Therefore,please find attached a revised Table 1, which includes borings MH6-28 and MH6-29, for <br /> incorporation into the approved work plan. We have also attached a copy of Figure 2 for your reference. <br /> Please call Bella Bakrania at 510-466-7178 if you have any questions, comments,or need to discuss this <br /> work plan addendum in more detail. <br /> Sincerely, <br /> SCIENCE APPLICATIONS INTERNATIONAL CORPORATION <br /> Bella P. Bakrania Christopher B. Dennis, P.G. 7184 <br /> Project Manager Senior Project Manager c, NAL G <br /> 0 <br /> 0CHRISTOPHER <br /> B. <br /> Attachments: DEN <br /> n N <br /> � NIS >r <br /> Figure 2: Site Map and Proposed Boring Locations U,\ No.7184 <br /> Table 1: Proposed Boring ObjectivesRevisedCP CAr 1F <br /> Expires August 31 2"r.;. <br /> 3800 Watt Avenue,Suite#210,Sacramento, CA 95821(916)974-8800 'Fax:(916)979-3735 <br />