2025-04-28_REVISION - M2023002 (16)

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iP For Agency Use Only: A C D P H E CO L O R A D O Permit Number Assigned CO L, Department of Public Health&Environment COG50 - APPLICATION FOR CDPS GENERAL PERMIT COG500000 DISCHARGES FROM SAND AND GRAVEL MINING AND PROCESSING Please print or type. The application must be submitted to the Water Quality Control Division at least 60 days prior to the anticipated date of discharge, and must be considered complete by the division before the review and approval process begins. The division will notify the applicant if additional information is needed to complete the application. If more space is required to answer any question, please attach additional sheets to the application form. Applications may be submitted by mail or hand delivered to: Colorado Department of Public Health and Environment Water Quality Control Division, WQCD-P-B2 4300 Cherry Creek Drive South Denver, Colorado 80246-1530 Submission- Digitally signed documents may be emailed to cdphe.wgrecordscenter®state.co.us Do not follow up with a mailed-in hard copy. A. PERMIT INFORMATION Reason for Application: ❑ NEW CERT e RENEW CERT EXISTING CERT# COG502222 Applicant is: o Property Owner ❑ Contractor/Operator The applicant requests authorization for the following discharge type(s). EiMine (pit) dewatering: includes any water, such as groundwater, seepage, and stormwater(precipitation and surface runoff), that is impounded or that collects in the mine pit(surface or underground workings)and is pumped, drained,or otherwise removed from the mine through the efforts of the mine operator. In addition, for construction sand and gravel facilities and industrial sand facilities only, mine dewatering includes wet pit overflow caused solely by direct rainfall and/or groundwater seepage; Process generated wastewater: includes any wastewater used in slurry transport of mined materials, air emissions control, and processing exclusive to mining. Water used in processing the mined commodity: includes water from washing, sorting, screening, crushing, classifying, etc. Stormwater runoff, comingled with the above listed wastewaters before the discharge point. 111 Stormwater runoff (not comingled with the above listed wastewaters) from facility pollutant sources: includes runoff from stockpiles, disturbed areas, roads, maintenance areas, etc.; asphalt batch plants(SIC code 2951); concrete batch plants(SIC code 3273); or asphalt and concrete recycling activities conducted at the facility. Note: the following discharge types are not eligible for coverage under CDPS General Permit COG500000: • Stormwater discharges associated with construction activity that disturbs one acre or more; • Process water discharges from asphalt batch plants (resulting from the production of asphalt concrete); • Process water discharges from concrete batch plants, including drum and truck wash water (concrete wash out); • Stormwater and process water discharges from placer mining industrial activities (SIC Major Group 10). • Process water discharges from the SIC codes identified in Appendix 1 of this application. Page 1 of 8- Revision 2/2021