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periods, water drains through the piles, with the large waste marble blocks acting as a sediment trap. The <br />PH of the water runoff tends to be slightly high (basic) while Yule Creek water is more acidic, so the <br />result may be a slight improvement in the quality of Yule Creek water. <br />The quarry operation generates no acid or toxic materials. The waste generated by marble cutting is the <br />only by product of mining Maintenance of diesel powered equipment will take place underground. <br />Generated waste oil and other fluids from maintenance will be transported offsite and disposed of in an <br />appropriate matter. Other refuse will be transported offsite and be disposed of in an approved matter. <br />Colorado Stone expects no processing on site except for marble cutting or polishing operations. Such <br />processing will occur underground and involve no process chemicals. Finished marble blocks will be <br />stored at the Storage Area (storage area) in Marble, CO prior to shipping to customers. <br />The marble to be quarried is approximately 280 to 300 feet thick (true perpendicular thickness) in the <br />vicinity of the affected area. The marble seam dips to the west at approximately 25 to 28 degrees with a <br />strike of approximately North 26 degrees west. <br />The primary commodity produced is dimension stone in the form of white marble blocks. These may be <br />further processed off -site, for eventual sale to large and small marble installations shops around the <br />world. There are no incidental products to be produced by the quarry at the time of the 2010 <br />Amendment but management is working to develop alternate markets for aggregate and fine products. <br />Explosives may be necessary to remove old waste marble during construction of sediment control <br />devices and roads. No blasting will be used underground at any time. Details about the blasting can be <br />found in subsection 6.0. <br />For a technical Revision in 2012, a new Portal #5 is proposed. <br />Portal #5 is a new portal which is an access into a higher portion of the marble deposit. This access is to <br />be 30 feet wide x 16 feet high, driven directly into the marble face. This portal is applied for in a TR of <br />April 2012. <br />Yule Quarry April 2012 16 <br />