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PART I <br />Page No. I2 <br />Perrttit No. CO-0044377 <br />• D. SPECIAL REQUIREMENTS <br />2. Stormwalcr Requircmcnls (continued) <br />For those areas outside o(the areas that contribute runoff to outfalls that are subject to effluent limitations <br />guidelines: <br />- an estimate of the direction(s) of Ilow; <br />- stormwatcr out(alls and an outline of the drainage area of each stormwater out(all; <br />- each existing structural control measure to reduce pollutants in stormwater runoff; and <br />- the location of impen~ious structures (c.g. parking lots, roofs, etc.) <br />4) Description of Potential Pollutant Sources/Material Inventory. The plan shall provide a description of potential <br />sources which may reasonably be expected to add pollutants to stormwa[er discharges. The plan shall identify <br />all activities and materials which may potentially be pollutant sources. This description of sources should agree <br />with sources identified on the site map. The description shall include, at a minimum: <br />i) An inventory and narrative description of significant materials that have been treated, stored or disposed of <br />in a manner to allow exposure to stormwater from January 1, 1990 to the present; method of on-site <br />storage or disposal; and materials management practices employed to minimize contact of these materials <br />with stormwater runoC( between January I, 1990 and the present. <br />ii) A list of significant spills and significant leaks of tonic or hazardous pollutants that occurred at the facility <br />from January 1, 1990 to the present. <br />iii) For each mining site area that generates stormwater discharges with a reasonable potential for containing <br />pollutants, identification of the potential pollutants which aze likely to be present in the stotmwater <br />discharges. <br />iv) A sutttmary of any existing discharge sampling data describing pollutants in the stormwater discharges. <br />5) Stormwater Ouality Controls. The SWMP shall include a description of stormwater quality controls to be <br />implemented at tltc [3ear Mine No. 3. The control measures shall reflect identified potential sources of <br />pollutants at the site. The description of storntwater quality controls shall address the following minimum <br />components, including a schedu!^ far implementing such controls: <br />i) S1YI11P Administrator -The SWMP shall identify a specific individual or individuals within the mining <br />organization who is responsible for developing the SWMP and assisting the mine operator in its <br />implementation, maintenance, and revision. <br />ii) Risk Identification and Assessment -The SWMP shall assess the potential of pollutant sources at the mine <br />to contribute pollutants to stormwater discharges associated with mining activity. Each of the following <br />shall be evaluated for the reasonable potential of contributing pollutants to runoff: <br />- loading and unloading operations; <br />- outdoor storage of chemicals or equipment; <br />- outdoor milling or processing activities; <br />- historic mine drainage; <br />- tailings ponds; <br />- crushing facilities or significant dust and paniculate generating activities; <br />- on-site waste disposal practices; and <br />- stockpiles of overburden, raw material, intermediate products, byproducts, finished products or waste <br />products. <br />• Factors to consider include: the toxicity of the material; quantity of chemicals used; amount of material <br />processed; the likelihood of contact with stormwater; and history of significant drainage, leaks or spills of <br />toxic or hazardous pollutants. In each case where stormwater pollution potential exists, appropriate <br />preventive measures must be identified and implemented. <br />rn~oar No..me~. u. rrw <br />