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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 9. Permit No. CO-0027154 <br />V. PERFORMANCE HISTORY <br />A. Monitoring Data (continued) <br />Table V-12 -- Summary of State Sampling Results For Outfall 007 <br />Parameter <br />Flow, MGD <br />pH, s.u. <br />Oil and Grease, mg/1 <br />TSS, mg/1 <br />TDS, mg/1 <br />TR Copper, mg/1 <br />TR Iron, mg/1 <br />TR Manganese, mg/1 <br />TR Zinc, mg/1 <br />No, of Reported Previous No. of <br />Samples Concentrations Permit Violations <br /> Avg/Min/Max Limit <br />2 0.059/0.056/0,061 none <br />2 -/8.2/8.3 6.5-9.0 0 <br />2 K10/K10/K10 10 0 <br />2 K10/K10/K10 35 0 <br />2 4380/4360/4400 5000 0 <br />2 K0.008/K0.005/K0.010 0.022 0 <br />2 K0.120/K0.100/K0.140 1.0 0 <br />2 0.155/0.090/0.220 Report* 0 <br />2 K0.015/K0.010/K0.020 0.05 0 <br />* Reporting was required for calculation of the limitation that applied at <br />outfall 019 - equal to the flow-weighted mean of the results from outfalls <br />001, 005 and 007. <br />B. Compliance with Terms and Conditions of Previous Permit <br />A review of the data summarized on the preceding pages shows compliance to be <br />generally good, with a few exceptions. One exceedence each are shown for the <br />following outfalls and parameters: outfall 005 - TR iron, TR silver and TR zinc; <br />outfall 007 - TSS and TR zinc; outfall 019 - TR manganese. All appear to be <br />isolated incidents and the permittee responded with corrective measures. <br />VI. TERMS AND CONDITIONS OF PERMIT <br />A. Effluent Limitations <br />In developing suitable effluent limitations, the Division must review all <br />applicable standards and regulations and apply that which is more stringent. <br />This review includes, but is not limited to, the water quality standard based <br />effluent limitations, federal guidelines and standards (40 CFR Subchapter N) and <br />State Effluent Regulations (10.1.0). Such a review has been done for this <br />facility. The following limitations will apply and are discussed below. <br />Table VI-1 -- Effluent Limitations For Outfall 001 <br />Parameter <br />Limitation <br />Rationale <br />Flow, MGD Report J Design Capacity <br />TSS, mg/1 35/70* J BPJ of BPT <br />Total Recoverable Iron, mg/1 1.0 J Water Quality Standards <br />