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COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Control Division <br />;, Rationale -Page 3, Permit No. CO-0000132 <br />Table V-1-Self-monitoring Data for Outfall 011 <br /> <br />Parameter No. of <br />Reporting <br />Periods Reported Average <br />Concentratioros <br />Avg/Min/Max Reported Maximam <br />Concentrations <br />Avg/Mfn/Max Permit <br />Avg/Max <br />Limit Number of <br />Limit <br />Excursions <br />pH (su) 6 8.5/8.2/8.9 8.5/8.2/8.9 6.5/9. D D <br />Fe, Tot (ug/!) 6 278/120/490 363/120/490 3000/6000 0 <br />TSS (mg/1) 6 18/<S/53 19/<S/53 35/70 / <br />Oil and Grease 6 NA/NA/NA NY/NV/NV NA/10 0 <br />TDS (mg/!) 6 3163/3100/3200 3200/3200/3200 NA/NA 0 <br />WET, acute <br />Ceriodaphnia 1 NA/NA/NA >IOOhlOOh100 >I00 0 <br />Fathead Minnows S NA/NA/NA >IOOhlOOh100 >I00 0 <br />B. Compliance With Terms and Conditions ojPrevious Permit <br />1. E,Iluent Limitations: The data shown in the preceding table indicate one apparent violation of the permit effluent <br />limitations. As this was an isolated ezceedence, no action was taken. <br />2. Other Permit Requirements: The permittee has been in apparent compliance with all other terms and conditions of the <br />permit. <br />n TERMS AND CONDITIONS OF PERMIT <br />A. Determination ofEJJluentLimftations <br />1. Effluent Limitations: The effluent limitations contained in Tables V1-1 and VI-2 will apply and are discussed in Section <br />VI.A.2. <br />Table VI-I E/Yluent Limitations far Dutfal1075 <br />Parameter Limit Rationale <br />Flow, MGD Report/Report a Design Capacity <br />TSS, mg/l 35/70 d Federal Effluent Limits <br />pH, s.u. 6.5-9.0 c Water Quality Standards <br />Oil and Grease, mg/! 10 b State Effluent Regulations <br />TDS, mg/1 Report/Report d Salinity Regulations <br />WET, Acute LC50 > 100• b State Permit Regulations <br />Iran, Total, ug/! 3000/6000 d Federal Effluent Limits <br />Ta61e VI-2-Ef)4uent Limitations for Out jalls 007, 009, 010, 012, 013, 014, 016, and 077 <br />Parameter Limit Rationale <br />Flow, MGD Report/Report a Design Capacity <br />TSS, mgA' 35/70 d Federal Effluent Limits <br />pH, s. u. 6.5-9.0 c Water Quality Standards <br />Oil and Grease, mg/1 10 b State Effluent Regulations <br />TDS, mg/l Report/Report d Salinity Regulations <br />Iron, Total, ug/lt <br />Outfalls 007, 009, 010 3500/7000 d Federal Effluent Limits <br />Outfalls 012, 013, 014, 016, 017 3000/6000 d Federal Effluent Limits <br />Settleable Solids, ml/1 • Report/0.5 d Federal Effluent Limits <br />last Revised: 3/!9/2004 <br />