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August 10, 2011 <br />Colorado Division of Reclamation, Mining and Safety <br />Attention: Michael Cunningham <br />1313 Sherman Street, Room 215 <br />Denver, Co 80203 <br />RE: Affirmation of Clean and Inert Material, Technical Revision 3, Permit # M- 1978 -210 <br />Dear Mr. Cunningham, <br />Per your request during our telephone conversation on the afternoon of August 9, 2011, Weld County <br />is affirming that the clay material needed for incorporation into the slurry wall will be composed of <br />clean and inert material. The material has been tested by the design engineer and has been deemed to <br />be clean, inert material that is suitable for incorporation into the slurry wall. <br />The volume of material to be imported and method of placement has been described in the <br />documentation that was submitted in support of Technical Revision Number 3. <br />Sincerely, <br />Clay Irirn.rni <br />Weld County Public Works <br />Enclosures <br />M:\DAVE B \Geisert Pit \DRMS Permit Amendment \Clean and Inert Material Affirmation 8- 10- 11.doc <br />PUBLIC WORKS DEPARTMENT <br />1111 H STREET, P.O. BOX 758 <br />GREELEY, COLORADO 80632 <br />WEBSITE: www.co.weld.co.us <br />PHONE: (970) 304 -6496 <br />FAX: (970) 304 -6497 <br />