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From Science to Solutions- <br /> HPP-BTR MP#220.27/223.4 <br /> Mountain House Development Reports <br /> DCN:C20-SAI-Mountain-House-01-8956 <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 M116-28 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 ,O(WLr,�.O< <br /> O <br /> CHRISTOPHER N <br /> a B. <br /> Attachments: * DENNIS <br /> Figure 2: Site Map and Proposed Boring Locations No.7184 �F <br /> �9�i` 01 <br /> Table 1: Proposed Boring Objectives—Revised OP CA1�F <br /> Expires August 31 21 rd <br /> 3800 Watt Avenue,Suite#210,Sacramento, CA 95821(916)974.8800 'Fax:(916)979-3735 <br />