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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale, Page 5 Permit No. CO-0026981 <br />AMENDMENT N0. 1 (Continued): <br />Table 3 <br />Chipe[a Mining Corp. Permit Limitations and Monitoring Requirements <br />Parameter Limitation: Season <br />Nov - Apr <br />Flow, MGD NA - Monitor a/ <br />TSS, mg/1 20130 a/ <br />TDS, mg/1 NA - Monitor b/ <br />pH, s.u. 6.5 - 9.0 c/ <br />Oil and Grease, mg/1 10; No Sheen dl <br />T.R. Cadmium, mg/1 a/ 0.0045/ <br />0.0090 <br />T.R. Copper, mg/1 a_/ 0.047( <br />0.094 <br />T. Lead, mg/1 (Interim Limits) a/ 0.30/ <br />0.60 <br />T.R. Lead, mg/1 (Final Limits) a/ 0.087/ <br />0.17 <br />T. Mercury, mg/1 a/ 0.00024/ <br />0.00048 <br />T. Zinc, mg/1 a_/ 0.5/ <br />1.0 <br />T. Cyanide NA - Monitor a/ <br />Monit. <br /> Rationale Freq. <br />March - July Aug - Oct <br /> Monitor Weekly <br /> BPT/BAT e/ 3 X Mo. <br /> CRSR f( Quart. <br /> WQS g/ Weekly <br /> SES h/ Weekly <br />0.0060/ 0.0027/ WQS 3 X Mo. <br />0.012 0.0052 <br />0.11/ 0.030/ WQS 3 X Mo. <br />0.22 0.060 <br />0.30/ 0.30/ BAT ;WQS 3 X Mo. <br />0.60 0.60 <br />0.18/ 0.072/ WQS 3 X Mo. <br />0.36 0.14 <br />0.00058/ 0.00018/ WQS 3 X Mo. <br />0.0012 0.00036/ <br />0,5/ 0.5/ BAT ;WQS 3 X Mo. <br />1.0 1.0 <br /> WQS Monthly <br />T. = Total T.R. ~ Total Recoverable <br />a_( 30 day averagelDaily maximum <br />b/ 30 day average <br />c/ Allowable range <br />d/ Daily maximum <br />e/ Federal limitations: Best Practical Control Technology and Best Available <br />Technology Economically Achievable <br />f/ Colorado River Salinity Regulations <br />1 <br />• <br />• <br />gg/ Water Quality Standard-based limits <br />~i/ State Effluent Standards <br />