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Golden Wonder Mine DRMS Mine Permit No M-1978-091 Storm Water Management Plan little to no dust. The crushing does create dust, however the amount of processing is slight. Observations of the crushing area indicate that very little dust and deposition is created. The crushed product is large in size and still typically retains some water. These factors lend to very little dust being formed. The waste rock can also lend acid rock drainage pollutants if stormwater comes into contact and percolates through the pile. Several management practices are currently in place to control stormwater from ever contacting the waste rock, and continued monitoring will be conducted to determine the need for any additional management practices. The management practices that keep stormwater away from the waste rock include the contouring of the pad towards the cut slope, perimeter berms that keep water from flowing off the pad and onto the waste rock slope, revegetated berms along the perimeter to stabilize the berms themselves, and benching of the waste rock slope to prevent sheet flow from gaining energy down-slope and causing erosive rills along the face of the slope. iii. Sediment and Erosion Prevention Sediment is the most likely pollutant to be associated with the mine since the access road and pad are exposed surfaces. However, sediment has not been observed as a stormwater issue with the exception of the erosional rill at the toe of the Leve16 road. Several management practices are in place Yo control stormwater as a run-on source which can pick up loose soil on the road and pad and create sediment. Run-on channels are maintained along the inside track of the Leve16 road to capture run-on and route it to a stormwater sump. Based upon the observations gathered during monitoring, the need for additional features such as culverts and rip-rap baffles comprised of boulder to cobble rock will be evaluated. iv. Other Pollution Prevention Measures The mine site will be constantly reviewed and maintained with GGI oversight. The identified pollution prevention measures described herein capture all those sources identified over time. The Golden Wonder has been in operation (on and off) for over 100 years. We believe that the existing management practices will address all stormwater concerns and any potential concerns as yet to become realized (e.g. waste rock acid rock drainage). However, stormwater conditions will be monitored and if additional measures are 9