2021-12-07_REVISION - M2012032 (18)

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z DLRAY SILVER MINES Discharge of On-Site Stormwaterto surface waters or to groundwater will be regulated through the Water Quality Control Division for discharges of stormwater or process water associated with hardrock mining and/or milling. Revenue Mine has obtained a Discharge Permit to allow discharge of industrial waste water from the mine pond; • Any discharge of On-Site Stormwater from the site shall be sampled and tested in accordance with our CDPHE Stormwater Permit; d The only acceptable methods of managing on-site stormwater runoff are to contain it for Use in Operations, for Infiltration into the ground, for Evaporation into the air, or Discharge to the Creek; and All fuel tanks, petroleum product storage and other chemicals will be regulated under the SPCC plan for the site. AREA SUBJECT TO EFFLUENT LIMITATIONS GUIDLINES The area subject to effluent limitations totals 23.92 acres. SITE MAP See Appendix- B for the SWMP Site Map. STORMWATER MANAGEMENT CONTROL MEASURES (BMP's) The following potential pollutant sources have been identified: crushing facility; • stockpiles of waste products (i.e., waste rock and tailings storage areas); and • disturbed areas. Stormwater within the disturbed area on site including the stockpiles of waste product and the crushing facility is routed to the passive water treatment system or sediment ponds. This SWMP was developed to prevent degradation of stormwater passing through the Revenue Mine site. Best Management Practices control measures are intended to prevent generation of additional sediment from the site. At this time, infiltration of stormwater into the soil is not regulated under this SWMP program. Water quality of groundwater is not being tested under this program since percolation through the soil generally reduces the transport of oils and suspended sediment. However, Stormwater Management Plan 71 P a g e