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. Additionally, there are no proposed or historic mine drainages from any adits, tunnels, or other mine workings. <br />3. Site Mans <br />See the attached oversized plats for site maps and other detail drawings. These drawings correspond to DRMS <br />permit drawings. Not all DRMS drawings are included; only the drawing pertinent for this SWMR <br />• Al - Site Vicinity Map <br />• A4 - Ownership Boundary Survey <br />• E4 - Pre-Existing Abandoned Waste Rock Dumps <br />• E7 - Tailings Impoundment, Phase 1 Diversion Ditch Arrangement <br />• E10 -Tailings Impoundment, Phase 2 Diversion Ditch Arrangement <br />• El 1 -Tailings Impoundment Cross-Sections <br />• E12 - Leachate Collection System <br />• E 13 - Sediment Collection Pond <br />• E 14 -Mobile Millsite Layout <br />4. Stormwater Management Controls <br />a. SWMP Administrator <br />Venture Resources has selected Ryan J. McHale, PE as their SWMP Administrator. McHale is a registered <br />CO Professional Engineer and the Company's Vice President overseeing operations. McHale can be <br />contacted at 303-619-6323 or ventureresources(a)att.net. <br />b. Identification of Potential Pollutant Sources and Best Management Practices (BMPI <br />• Potential Pollutant Sources <br />It should be carefully understood that this project involves cleaning up historic, abandoned mine waste <br />rock that has been in place for well over 100 years. This project extracts nearly all of the acid-foaming <br />minerals in waste rock that are the source of acid-runoff that plague this historic mining district. By doing <br />nothing, these piles of pre-existing waste rock will continue to leach acid and heavy metals for a very, very <br />long time. But, by designing a carefully_ regulated and engineered program a solution can be achieved. <br />Along with the environmental benefits of this cleanup, new employment opportunities and increased <br />business within the local economy will develop. <br />The pre-existing abandoned mine waste rock to be processed consists predominately of silica & alumino <br />silicate minerals. The sand portion is composed of vein type material such as quartz gangue and quartz <br />monzonite porphyries with some of the surrounding wall rock composed of metamorphic gneisses. The <br />clays are formed from altered wall rock and feldspars. <br />The acid formation occurs through a natural weathering phenomenon of the sulfide minerals, in this case <br />pyrites, with air and rainwater. This process occurs naturally underground as a natural geologic event. The <br />problem in this mining district is that the weathering process has been accelerated because the rock <br />containing these minerals has been brought to the surface and deposited in concentrated piles. With <br />increased air transfer and increased contact with rainwater, the accelerated oxidation creates an acidic run- <br />off more quickly that harms the environment. <br />The potential for acid formation exist because of the weathering of sulfide minerals present, consisting <br />primarily of iron sulfide (FeS2 or pyrite) and copper iron sulfide (CuFCS2 or chalcopyrite). These are the <br />minerals to be removed, along with the trace associations of precious metals and heavy metals that occur. <br />This is the material collected in the table and flotation concentrate for sale to a third party for further <br />treatment and refining. <br />• <br />Page 2 of 10