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"�. COLORADO <br /> rL <br /> Department of Public <br /> •* Health&Environment <br /> Dedicated to protecting and improving the health and environment of the people of Colorado <br /> CERTIFICATION TO DISCHARGE UNDER <br /> CDPS GENERAL PERMIT COG500000 <br /> DISCHARGES ASSOCIATED WITH SAND 6t GRAVEL MINING AND PROCESSING <br /> (and other Nonmetallic Minerals except fuel) <br /> Certification Number: COG501574 <br /> This Certification to Discharge specifically authorizes: <br /> Prowers Aggregate Operators LLC <br /> to discharge from the facility identified as <br /> West Farm Pit <br /> to: <br /> -ditch to Arkansas River <br /> Facility Located at: 9485 CR HH 5, Unincorporated, Prowers County, CO 81052 <br /> Center Point Latitude 39.1525, Longitude-102.%6944 <br /> Defined Discharge Outfall(s) <br /> Outfall(s)to Surface Lat, Long Discharge Outfall(s)Description Receiving Stream MGD <br /> Water <br /> Outfall Number 38.102489, Discharge from dewatering pump to Ditch to Arkansas 2.16 <br /> 001-A -102.581011 farm ditch. River <br /> Outfall Number 38.096614, Stormwater discharge from sediment Ditch to Arkansas NA <br /> 002-A -102.581383 togs near CR HH 8/10 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 outfall(s)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 Code 1442) <br /> Permitted Feature ID: 001A <br /> Permitted Feature Type: External Outfalt <br /> Limit Set: 2 <br /> Discharge Limitations <br /> Maximum Concentrations Monitoring Sample <br /> Parameter Units 30-Day 7-Day 2 Year Frequency Type <br /> Average Average ally Max' Average <br /> Flow', Continuous'/ ecorder' <br /> 50050 MGD 2.16 NA Report NA Instantaneous, In-situ' <br /> Monthly' <br /> pH, (Minimum- <br /> Maximum) S.U. NA NA 6.5-9.0 NA 2x/month Grab <br /> 00400 <br /> Total Suspended <br /> Solids, mg/l 30 45 NA NA 2x/month Grab <br /> 530 <br /> Page 1 of 3 <br /> 4300 Cherry Creek Drive S.,Denver,CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wgcd <br /> John W. Hickenlooper,Governor I Larry Wotk,MD,MSPH.Executive Director and Chief Medical Officer <br />