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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 5. PERMIT NUMBER: COG-850000 <br />• <br />EFFLUENT LIMITATIONS: (Continued) <br />- ACTIVE MINING - <br />Table 1 <br />(Applicable Regulations) <br />Parameter SES WAS BPT BAT NSPS <br />Flow (MGD) <br />pH (s.u.) <br />011 and Grease (mg/1) <br />Total Suspended Solids (mg/1) <br />Total Iron. (mg/1) <br />Settleable Solids (ml/1) <br />Total Dissolved Solids (mg/1) <br />(Colo. River Basin) <br />Total Phosphorus, as P (mg/1) <br />Parameter <br />-Monitoring Only <br />6.0 - 9.0 6.5 - 9.0 6.0 - 9.0 N/A 6.0 - 9.0 <br />10 N/A N/A N/A N/A <br />30/45 N/A , 35/70 N/A 35/70 <br />N/A N/A 3.5/7.0 3.5/7.0 3.0/6.0 <br />N/A N/A N/A 0.5 N/A <br />Monitor per Colo. Salinity Regulations--- <br />Moaitoring Dillon Reservoir Basis Oaly----- <br />Table -2 <br />(Final Limitations) <br />Limitation Basis <br />Flow (MGD) <br />pH (s.u.) <br />011 and Grease (mg/1) <br />Total Suspended Solids Cmg/1) <br />Total Iron Cmg/1) (Ezisting Sources) <br />Total Iron (mg/1) (New Sources) <br />Settleable Solids (ml/1) <br />Total Dissolved Solids Cmg/1) <br />(Colo. River Basin) <br />Total Phosphorus, ae P (mg/1) <br />(Dillon Reservoir basin only) <br />Parameter <br />Flow (MGD) <br />pH (s.u.) <br />Oil and Grease (mg/1) <br />Settleable Solids (ml/1) <br />Total Dissolved Solids (mg/1) <br />(Colo. River Basin) <br />Total Phosphorus, as P (mg/1) <br />Report Monitoring Only • <br />6.5-9.0 WQS <br />10 SES <br />35/70 BPT <br />3.5/7.0 BAT <br />3.0/6.0 NSPS <br />0.5 BAT <br />Report Monitoring Oaly <br />Report Monitoring Only <br />- POST-MINING - <br />Table 3 <br />(Applicable Regulations) <br />SES WAS BPT BAT NSPS <br />---Monitoring Only -- <br />6.0 - 9.0 6.5 - 9.0 6.0 - 9.0 N/A 6.0 - 9.0 <br />10 N/A N/A N/A N/A <br />N/A N/A N/A 0.5 0.5 <br />--Monitor per Colo: Salinity Regulations <br />Monitoring Dillon Reservoir Basin Only--- <br />