2023-01-04_PERMIT FILE - M2022013 (22)

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PART Page 6 of 67 Permit No.: COG500000 i. industrial plant yards; ii. 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; iii. material handling sites, including those used for asphalt and concrete recycling activities,asphalt batch plants,and concrete batch plants; iv. sites used for storage and maintenance of material handling equipment; v. shipping and receiving areas; vi. manufacturing buildings,including asphalt batch plants and concrete batch plants; v. storage areas and stockpiles of raw material, intermediate products,byproducts,finished products or waste products(including topsoil,overburden,and materials associated with asphalt and concrete recycling activities, asphalt batch plants,and concrete batch plants); vii. areas where industrial activity has taken place in the past and significant materials remain and are exposed to stormwater; viii. all disturbed areas(other than those subject to the process water discharge provisions above),including mine pit out slopes; and, ix. stormwater run-on that commingles with stormwater discharges associated with sand and gravel mining and processing. c. Allowable non-stormwater discharges: The following non-stormwater discharges, as applicable to a facility,are authorized by this permit provided that appropriate control measures are implemented to minimize erosion and sediment transport resulting from such discharges,and the non-stormwater component(s)of the discharge and the control measure(s) used are identified in the Stormwater Management Plan (SWMP): i. Uncontaminated condensate (external atmospheric condensation,only)from air conditioners,coolers,and other compressors and from the outside storage of refrigerated gases or liquids; ii. Landscape(including reclamation activities)watering provided all pesticides,herbicides,and fertilizer have been applied in accordance with the approved labeling; iii. Incidental windblown mist from cooling towers that collects on rooftops or adjacent portions of the facility, but not intentional discharges from the cooling tower(e.g., "piped"cooling tower blow down or drains); and iv. Process water discharges as characterized in Part I.A.1.a above. 2. Limitations on Coverage This permit does not authorize the discharges or activities listed below. Permittees may seek individual or alternate general permit coverage for such discharges,as appropriate and available. a. Stormwater discharges associated with construction activity that disturbs one acre or more; b. Process water discharges from asphalt batch plants(resulting from the production of asphalt concrete); c. Process water discharges from concrete batch plants, including drum and truck wash water; d. Stormwater and process water discharges from placer mining industrial activities(SIC Major Group 10); e. Discharges to receiving waters designated as"outstanding waters" in accordance with 5 CCR 1002-31(Regulation 31- The Basic Standards and Methodologies For Surface Water); f. Discharges that are currently covered under an individual permit or an alternative general permit; g. Discharges of non-stormwater,except those authorized non-stormwater discharges listed in Part I.A.1.c; h. Discharges currently covered by a Division Low Risk Guidance Document; i. Process water discharges solely to ground water if such discharges are subject to direct regulation by the EPA or by implementing agencies under Section 25-8-202(7)of the Water Quality Control Act or Senate Bill 181(including the Division of Reclamation, Mining and Safety).This exclusion does not apply to discharges to groundwater that have a hydrologic connection to surface waters and for which the Division determines the surface waters requirements of Regulations 31 through 39,and 61 apply;