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3.11 TOPSOIL PRESERVATION <br /> • All topsoil will be retained on-Site for use in the Restoration Plan. <br /> 3.12 SLOPES <br /> All extractions except for the working face will be sloped at 1:1. All restored slopes will have a <br /> maximum slope of 4:1. <br /> • <br /> LIESCH ASSOCIATES,INC. <br /> January 2003 Hydrogeologists Engineers Environmental Scientists -Page 8- <br />