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MINING PLAN <br /> It is important to note that a requirement of the lease agreement is that the bottom of the <br /> quartzite not be penetrated by mining. This is a comparatively easy boundary to identify as the rock <br /> under the quartzite is very light buff to white in color. <br /> No toxic or acid forming materials are known to occur in this quartzite and as the lower <br /> formations are not to be exposed in the mining, any materials present in those beds are not of <br /> concern. The quartzite is very hard and generally glassy in texture. It exhibits a high silica content <br /> (nearly 100%) with a small component of iron which renders the rock a light to deep red color. <br /> There is no overburden on this deposit other than the soils. <br /> Cross-Sections <br /> At the end of this exhibit are three cross-sections, the location of which are shown on <br /> various maps in Exhibits C and F. These cross-sections show the existing topography and the <br /> estimated reclamation topography. The depth of mining indicated on these cross-sections is set at 25 <br /> to 30 feet and that determines the reclamation topography. The lower line which is the estimated <br /> reclamation topography is not necessarily the bottom of the quartzite deposit. In most cases the <br /> bottom of the quartzite is a few feet lower in elevation than the reclamation topography. The <br /> reclamation topography approximately parallels the existing topography, but averages out some the <br /> irregularities in the surface topography that are probably not reflected in the thickness of the deposit <br /> to be mined. In locations where a cross-section encounters the existing mine the depth of the <br /> mining was determined by deducting from the average thickness of the deposit the thickness of <br /> material already removed. In the bottom of the existing quarry there is very little material left to be <br /> mined and therefore the cross-sections show very little change in the elevation of the land after <br /> mining. <br /> The cross-sections show a thickened, shaded line on the top of the reclamation topography. <br /> That line represents soils replaced for revegetation purposes. The thickness of this line is probably <br /> greater than the actual thickness of the soil. Therefore, this shaded line is presented for <br /> diagrammatic purposes only and is not intended to represent an actual soil thickness. <br /> These cross-sections will also be referred to in the Reclamation Plan, Exhibit E. <br /> Table Mountain Quarry - Castle Concrete Company Exhibit D Page D-8 <br />