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• Two samples of run-off water were analyzed at different times from the vicinity of this pre-existing waste <br />rock. Those lab results are attached to this SWMP as an appendix. The correlation between them is not <br />entirely consistent, but it gives a good idea of the pollution potentials. To show net improvement potential <br />of the milling process, a processed tailings sample is also provided. <br />Loading and Unloading Operations: <br />The location of the pre-existing waste rock will become the NEW location of the regulated <br />tailings impoundment, refer to maps in Section 3. As the pre-existing waste rock is removed, it is <br />then processed in the milling operation and the newly formed mill tailings (in a minerally depleted <br />state) will be re-impounded in the same vicinity. This will be a phased approach because it is <br />necessary to install a liner before re-impounding processed tailings. <br />Rubber-tired loaders and track excavators will be employed daily to load waste rock into dump <br />trucks. At this location, there is the potential of sto mwater run-off containing mineral acid, heavy <br />metals and sediment. Diversion measures will be addressed in the BMP section following. It is <br />also possible that spills of waste rock may occur when loading trucks. This will also be addressed <br />in the BMP section. The impacted area ranges in size from 1/4 acres upto 8 acres at a future date <br />(10 years distant) of complete build-out. <br />The unloading location is a sheltered, concrete pad next to the milling operations. This pad has <br />been engineered to isolate the material from weather events. Spills of waste rock could occur here <br />and will be addressed in the BMP section. <br />• Outdoor Storage of Chemicals or Equipment: <br />As part of operations, there will be rubber-tired loaders (1-2), an excavator, dump trucks (1-2), <br />and various trailers on-site. BMP's addressing this will follow. There are no outdoor washing <br />• facilities. <br />There will also be the potential of outdoor storage of the following chemicals: <br />• Diesel motor fuel, 500 gallons - for equipment fuel. <br />• Motor oil, upto (1) 55 gal. drum and/or (5) five gallon buckets - for equipment lubrication. <br />• Automatic Transmission Fluid, upto (1) 55 gal. drum and/or (5) five gallon buckets - for <br />equipment lubrication. <br />• Hydraulic Oil, upto (1) 55 gal. drum and/or (5) five gallon buckets - for equipment <br />lubrication. <br />• Hydrated Lime, upto (100) 50 pound bags - for processing pH control and sulfide mineral <br />depressant. <br />o Stored outside on a wooden pallet, tarped to keep out moisture. <br />• Soda Ash, upto (100) 50 pound bags - for processing pH control and sulfide mineral <br />depressant/separator. <br />o Stored outside on a wooden pallet, tarped to keep out moisture. <br />BMP's will follow concerning chemical storage. <br />• Outdoor Milling or Processing Activities: <br />All milling activities utilizing process water are conducted inside enclosed trailers. <br />The only exposed outdoor processing is the two stage crushing operation. Here rock is crushed <br />first in a jaw crusher then in a roll crusher. The final crushed product is transferred to a sheltered <br />crushed ore bin. (niy about 80 tons (55 cubic yards) of rock is crushed per 10 hour day shift. It <br />is possible for stormwater to contact crusher fines in this area, therefore BMP's will be created to <br />address this. <br />• <br />Page 3 of 10