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The site activities are constantly monitored to determine whether there is need for individual air <br />permits. Currently (and into the future) site activity is minimal and does not require individual <br />air permits. However, in the interest of being conservative, an Air Permit Emission Notice is <br />being prepared which inventories all possible air quality impacts from the ongoing activity. This <br />notice simply identifies the site as being an active mineral mine with potential dust emission <br />sources. <br />The CDPHE stormwater program continually inspects and reviews site conditions to determine <br />whether the existing stormwater management plan is in compliance. The site maintains a <br />stormwater permit and shares the hydrologic setting information with CDPHE in order to address <br />any other possible permit condition (e.g. NPDES point discharge permit). <br />The underground conditions were reviewed by the EPA Underground Injection Control program <br />(Spring 2007). The underground water management strategies were not considered to fall within <br />the UIC definitions of injection wells. <br />(4) Designated Chemical Evaluation <br />The site activities do not require a significant amount of designated chemical usage. The site <br />contains a 500 gallon fuel tank designed with secondary containment. This fuel tank is stored <br />within the foundation area where the crusher was housed and has spill containment features <br />immediately adjacent. All drilling lubricants/oils are contained within the pad storage buildings. <br />There are no other designated chemicals associated with the site activities. <br />16