Laserfiche WebLink
Privileged and Confidential-Attorney Client Communication Ge osptec <br /> consultants <br /> Table 2: Water Quality Discharge Limits* <br /> Effluent lity Standard <br /> 30-Day Average Daily Maximum <br /> pH 6.5-9 <br /> TSS,effluent(mg/L)** 20 30 <br /> TDS (mg/L) Report NA <br /> Arsenic,Total Recoverable(ug/L) Report NA <br /> Cd,Total (ug/L) 50 100 <br /> Cd, Potentially Dissolved(ug/L)*** 0.44 2.1 <br /> Cr+3,Total Recoverable(ug/L) Report NA <br /> Cu,Total (ug/L) 150 300 <br /> Cu, Potentially Dissolved(ug/L) 12 Report <br /> CN, WAD(ug/L) NA 5.6 <br /> Fe,Total Recoverable(ug/L) 1,204 NA <br /> Pb,Total (ug/L) 300 600 <br /> Pb, Potentially Dissolved(ug/L) 2.6 91 <br /> Mn,Potentially Dissolved(ug/L) 1,960 3,828 <br /> Hg, Tot(low level)(ug/L) 0.011 NA <br /> Hg,Total (ug/L) 1 2 <br /> Ag, Potentially Dissolved(ug/L) 0.08 Report <br /> Zn,Total (ug/L) 750 1,500 <br /> Zn, Potentially Dissolved(ug/L) 126 166 <br /> WET,chronic—Static Renewal 7 Day NOEC or IC25> IWC <br /> Chronic Pimephales promelas **** <br /> WET,chronic—Static Renewal 7 Day NOEC or IC25> IWC <br /> Chronic Ceriodaphnia **** <br /> *Source:CDPS Permit CO-0000003,Permit Modification 3 <br /> **7-Day average is used instead of daily maximum for TSS <br /> ***OSMI has requested a change in the permit limit for Cd to reflect the new standard,which will change <br /> the 30-day average to 0.76 ug/L and the daily maximum to 2.55 ug/L(reference: letter to CDPHE from <br /> OSMI dated October 25,2017) <br /> ****NOEC=No Observed Effect Concentration,IC25=effluent concentration which causes a 25% <br /> reduction in growth or reproduction of test organisms,IWC=instream waste concentration <br /> Treatability Study Work Plan 4 February 8,2018 <br />