2018-10-22_REVISION - M2008078 (12)

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PART Page 38 of 67 Permit No.: COG500000 iv. On-site dust or particulate generating processes,including dust collection devices and vents. v. On-site waste treatment,storage,or disposal,including waste ponds and solid waste management units. vi. Vehicle and equipment fueling, maintenance,and/or cleaning(includes washing). vii. Immediate access roads and rail lines used or traveled by carriers of raw materials,manufactured products,waste material,or by-products used or created by the facility. viii. Roofs or other surfaces exposed to air emissions from a manufacturing building or a process area. ix. Roofs and associated surfaces composed of galvanized materials that may be mobilized by stormwater(e.g.,roofs, ducts,heating/air conditioning equipment,gutters and downspouts). b. Inventory of materials The inventory shall list materials that contribute,or have the potential to contribute, pollutants to stormwater,including but not limited to the following: i. The types of materials handled at the facility that may be exposed to precipitation or runoff and could result in stormwater pollution. ii. The types of materials handled at the facility that may leak or spill,and be exposed to precipitation or runoff and result in stormwater pollution. iii. A narrative description of any potential sources of pollutants from past activities, materials and spills that could contribute pollutants to stormwater discharges,and the corresponding outfall(s)that would be affected by such spills and leaks.The description shall include the method and location of any on-site storage or disposal;and documentation of all significant spills and leaks of oil or toxic or hazardous pollutants that occurred at exposed areas,or that drained to a stormwater conveyance,in the 3 years prior to the SWMP preparation date. c. Assessment of potential pollutant sources The assessment of potential pollutant sources shall provide a short narrative or tabulation describing the potential of a pollutant to be present in stormwater discharges for each facility activity,equipment and material identified above.The permittee shall update this narrative when data become available to verify the presence or absence of these pollutants. Potential pollutant sources include: i. Loading and unloading operations; ii. Outdoor storage of chemicals or equipment; iii. Crushing facilities or significant dust and particulate generating activities; iv. On site waste disposal practices; v. Stockpiles of overburden,raw material, intermediate products,byproducts,finished products or waste products; vi. Asphalt or concrete batch plants or areas used for recycling of asphalt or concrete; vii. Routine maintenance activities involving fertilizers,pesticides,detergents,fuels,solvents,oils,etc.; viii. Haul roads;and ix. Disturbed and revegetated areas. 5. Description of Control Measures a. The permittee shall document the location,installation date,type,and implementation specifications of each non- structural and structural control measure implemented at the facility to achieve meet the effluent limitations contained in this permit. Documentation must include those control measures implemented for stormwater run-on that commingles with any discharges covered under this permit. b. Installation and implementation specifications for each control measure used by the permittee to meet the effluent limitations contained in this permit must be retained with the SWMP.