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COLORADO <br /> Department of Public <br /> ' Health b Environment <br /> Dedicated to protecting and improving the health and environment of the people of Colorado <br /> CERTIFICATION TO DISCHARGE UNDER CDPS GENERAL PERMIT COG500000 <br /> DISCHARGES ASSOCIATED WITH SAND Et GRAVEL MINING AND PROCESSING <br /> (and other Nonmetallic Minerals except fuel) <br /> Certification Number: COG501549 <br /> This Certification to Discharge specifically authorizes: <br /> Bestway Concrete and Aggregates <br /> to discharge from the facility identified as <br /> Bernhardt Resource <br /> to: <br /> Big Thompson River <br /> Facility Located at: �315 Frontier Ct, Milliken, Weld County, CO 80543 <br /> Center Point Latitude 40.337784, Longitude -104.842615 <br /> Defined Discharge Outfall(s) <br /> Outfall(s)to Surface Discharge Outfall(s) Description Receiving Stream MGD <br /> Water Lat, Long <br /> Outfall Number 40.337151, Mine pit dewatering and commingled Big Thompson 1.5 <br /> 001-A -104.840944 stormwater River <br /> Outfall Number 40.336163, Mine pit dewatering and commingled Big Thompson 1.5 <br /> 002-A -104.835671 stormwater River <br /> Outfall Number 40.337993, Mine pit dewatering and commingled Big Thompson 1.5 <br /> 003-A -104.833425 stormwater River <br /> All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, <br /> drainage districts and other local agencies regarding any discharges to storm drain systems, conveyances, or <br /> other water courses under their jurisdiction. <br /> Permit Limitations and Monitoring Requirements apply to outfalls 001A as outlined in the Permit in <br /> Parts I.C.1, I.D, and I.E. <br /> Crushed Stone and Construction Sand and Gravel Facilities (SIC Codes 1442) <br /> Permitted Feature ID: 001A <br /> Permitted Feature Type: External Outfall <br /> Limit Set: 2 <br /> Discharge Limitations <br /> Parameter Units <br /> Maximum Concentrations Monitoring Sample 30-Day 7-Day Average Daily Max. Frequency Type <br /> e <br /> Average <br /> Flow' MGD 1.5 NA Report Continuous' Recorder' <br /> 50050 <br /> pH, (Minimum- <br /> Maximum) S.u. NA NA 6.5-9.0 2x/month Grab <br /> 00400 <br /> Total Suspended <br /> Solids, mg/t 30 45 NA 2x/month Grab <br /> 00530 <br /> Page 1 of 3 <br /> 4300 Cherry Creek Drive S , Denver, CO 80246-1 5 30 P 303-692-2000 www.cotorado.gov/cdphe/wqcd ®� <br /> John W. Hickenlooper, Governor I Lairy Wolk,MD,MSPH, Executive Director and Chief Medical Officer • <br />