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I ~~ PARTi Page No. 7 Permit No. COG-650000 _ . _. • ' ~~7 ~' . . B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 2. Stormwater Manaeement Plan (SWMP) (continued) c. Erosion and Sediment Controls - Descnbe BMPs that will be used to reduce erosion and prevent sediment delivery [o State waters. These should include stmctural (such as silt fences, sediment ponds, drop structures, check darns) and non- sttuctmal (such as mulching and revegetation) methods. Whenever a facility or a portion of a facility enters the post-mining phase, it is likely that the overall configttration of the site will change considerably. Prior to the time when new vegetation becomes established, the surface areas will be subject to potentially significant erosion. The permittee will need to take adequate measures in order to minimize this erosion as well as the erosion normally encountered during mining activities. d. Identification of Dischazees other than Stormwater -The stormwater conveyance system on the site shall be evaluated for the presence of discharges other than stormwater, such as mine drainage, spoil springs, sanitary waste, or process water of any kind. The SWMP shall include a description of the results of any evaluation for the presence of discharges other than stormwater, the method used, the date of the evaluation, and the on-site drainage points that were directly observed during the evaluation. b) Facility Inspections Qualified personnel identified by the operator shall make a comprehensive inspection of their stormwater management system, at least twice per year (in the spring and fall), except as provided in paragraphs d and e, below. These comprehensive inspections must be documented and snmmari~.d in the Annua! Report (see Part I.D.2. of the permit). 1) Material handling areas, disturbed areas, areas used for material storage that are exposed to precipitation, and other potential sources ofpoltution identified in the SWMP in accordance with Part I.B.2.a)1) of dris permit shall be inspeRed for evidence of, or the potential for, pollutants entering the drainage system. Structural stotmwater management measures, sediment and control measures, and other structural pollution prevention measures identified in the plan shall be observed to ensure that they are operating correctly. A visual inspection of equipment needed [o implement the plan, such as spill response equipment, shall be made. 2) Based on the results of the inspection, the description of potential pollutant sources and pollution prevention measures identified is the plan shall be revised as appropriate within two weeks of such inspection. Such revisions shall provide for implementation of any changes to the plan in a timely manner, but in no case more than 90 days afrer the inspection. 3) A report summarizing the scope of the inspection, personnel making the inspection, the date(s) of the inspection, major observations relating to the implementation of the S WMP, and actions taken in accordance with paragraph (b), above, shall be made and retained as part of the SWMP for at least three yeazs. The report shall be signed in accordance with Part I.D.7. of this permit. 4) Where semi-annual site inspections are shown in the plan to be intptactical for sites where an employee is not stationed or does not routinely visit the site, inspections as required in this part shall be conducted at appropriate intervals specified in the plan, but never less than once in two years. 5) Where semi-annual site inspections are shown in the plan to be impractical for inactive sites (sites where industrial activity is no longer conducted), site inspections required by this part shall be conducted at appropriate intervals specified in the phur, but, in no case less than once in three years. At lease one site inspection required under this part shall be conducted before October 1, 1999, or the date two yeazs after such site becomes inactive, whichever is earlier. c) Additional SWMP Requirements. 1) Signatory Requirements: A copy of the plan shall be signed in accordance with Part I.D.7. and retained oa site. 2) SWMP Review/Changes: Upon review of the S WMP, the Division may notify the permittee at any time that the plan does not meet one or more of the minimum requirements of this permit. After such notification, the pennittee shall make changes to the plan and shall submit to the Division an update to dte plan including the requested changes. Unless otherwise provided by the Division, the peratittee shall have 30 days afrer such notification to both make the necessary changes to the plan and to implement them.