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<br />COLORADO DEPARTMENT OF HEALTH <br />Water Quality Control Division <br />Summary of Rationale Page 4 <br />Permit Number: C^x-,00001244 <br />tl. EFFLUENT LIMITATIOiJS AND RATIONALE: (continued) <br />Parameter Limitation P,ationale <br />Flow (MGD) N/A Monitoring, <br />Total Suspended Solids (mg/1) 30/20 BEJ of BAT" <br />COD (mg/1) 200/100 BEJ of BAT'` <br />Oil and Grease (mg/1) <10.00 State Effluent Standards <br />pH (s. u.) 6.5-9.0 5. Platte River Water Quality Stan. <br />Total Radium .26 6 228 (pCi`1) 10/5 Basic Standards 1/ <br />Total Arsenic (mg/1) ,10/.OS S. Platte River Water Quality Stan. <br />Total CoPPer (mg/1)`'"" 0.010/0.005 S. Platte River Water Quality S[an. <br /> !.010.5 Temporary Modif ication <br />Total Lead (mg/1)""" 0.064/0.032 S. Platte River Water Quality Stan. <br /> 0.10/0.05 Temporary Modif ication <br />Total Uranium (pCi/1) 40/80 5. Platte River Water Quality Stan. <br />(mg/I) 2/4 <br />Total Zinc (mg/1) .10/.05 - 5. Platte River lJater Quality Stan. <br />Total Selenium""'" N/A Monitoring <br />Total Nickel""'~" N/A Monitoring <br />Total Silver'"`~`'" N/A Monitoring <br />Total 2oron""''`'` N/A Monitoring <br />Total Mercury"`'~" IJ/A Monitoring <br />Sulfate """" N/A Monitoring <br />Total Cadmium"'`"" N/A Monitoring <br />Total Barium~~'°'~~~ N/A Monitoring <br />" Best Engineering Judgement of Hest Available Technology which represent current <br />BPT Effluent Limitations <br />""" These parameters are under a temporary modification written into r.he South Platte <br />River Water Quality Standards. The temporary modification is for one year be- <br />ginning with the effective date or Cho stream standards, May 16, '981. A <br />compliance schedul•: for these parameter; is included on page 7 of the permit. <br />°~~°~~ These parameters will be monitored for a one year period on a monthly basis <br />to determine gaszline conditions. If levels for these parameters indicate <br />that stream standards cannot be met then effluent limitations will be <br />placed in the permit and a •=ompliance scnedule adopted. <br />1/ Basic Standards <br />3.1.11 (2) <br />