2018-04-23_REVISION - M2007031 (4)

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COLORADO Department of Public '�'�+y,J Health b Environment Water Quality Control Division Fact Sheet,Permit No. 000048939 Minimizing exposure prevents pollutants from coming into contact with precipitation and can reduce the need for control measures to treat or otherwise reduce pollutants in stormwater runoff. As such, this is one of the most important control options. b. Good Housekeeping - good housekeeping is an inexpensive way to maintain a clean and orderly facility and keep contaminants out of stormwater discharges. Poor housekeeping can result in more stormwater running off a site than necessary and an increased potential for stormwater contamination. A clean and orderly work area reduces the possibility of accidental spills caused by mishandling of chemicals and equipment. Well-maintained material and chemical storage areas will reduce the possibility of stormwater mixing with pollutants. c. Maintenance of Control Measures -this PBEL requires that the permittee maintain all control measures used to achieve the effluent limits required by the permit in effective operating condition. Control measures must be maintained, in accordance with good engineering hydrologic and pollution control, to function as intended. d. Spill Prevention and Response Procedures • The purpose of this effluent limit is not only to prevent spills and leaks but, in the event one does occur, to limit environmental damage via development of spill prevention and response procedures. Based on an assessment of possible spill scenarios, the permittee must specify appropriate material handling procedures, storage requirements, containment or diversion equipment, and spill cleanup procedures that will minimize the potential for spills and, in the event of a spill, ensure proper and timely response. For a spill prevention and response program to be effective, employees should clearly understand the proper procedures and requirements and have the equipment necessary to respond to spills. e. Erosion and Sediment Controls - There may be exposed areas of industrial sites that, due to land disturbing activities, steep slopes, sandy soils or other factors, are prone to soil erosion. Land disturbing activities typically remove vegetation and other protective ground covers resulting in the exposure of underlying soil/overburden, etc. to wind and rain, which are easily eroded by wind or rain. This erosion process can be controlled or prevented through the use of appropriate control measures. The purpose of this effluent limit is to control or prevent the erosion process and control sediment transport from disturbed or other erodible areas at the facility. f. Management of Runoff- Managing runoff (diverting, infiltrating, reusing, containing, or treating stormwater runoff) prevents stormwater contact with exposed materials or pollutant sources, and like minimizing exposure, can reduce the need for control measures to treat or otherwise reduce pollutants in stormwater runoff. g. Salt Storage Piles or Piles Containing Salt - Salt storage piles are prevalent across the country. The permit requires that permittees adequately control salt piles to prevent aquatic effects resulting from stormwater runoff from such piles. The permittee must enclose or cover storage piles of salt, or piles containing salt, used for deicing or other commercial or industrial purposes, including maintenance of paved surfaces, and implement appropriate measures to minimize exposure resulting from adding to or removing materials from the pile. Preventing exposure of piles to stormwater or run-on also eliminates the economic toss from materials being dissolved and washed away. h. Employee Training - Operators must train all employees who work in areas where industrial materials or activities are exposed to stormwater,or who are responsible for implementing activities necessary to meet the conditions of this permit. i. Waste, Garbage and Floatable Debris - In addition to other stormwater pollutants, the permittee must minimize the discharge of waste, garbage, and floatable debris, so that these pollutants are not ultimately discharged to receiving waters. Trash and floating debris in waterways have become significant pollutants, especially near areas where a large volume of trash can be generated in a concentrated area. Trash can cause physical impairments in water bodies to aquatic species and birds, is also visual pollution, and detracts from the aesthetic qualities of receiving waters. Page 11 of 17 Vr 4300 Cherry Creek Drive S.,Denver,CO 80246-1530 P 303-692-2000 wwwJ1L .colorado.gov/cdphe/wqcd * John W.Hickenlooper,Governor Larry Wolk,MD,MSPH,Executive Director and Chief Medical Officer CO stez• t•: : . :vv:ei peuue.s