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Minrec, Incorporated Water Quality Assessment <br />CO- 0048233 <br />dissolved zinc, boron, and sulfide, there are no previous permit limitations and implicit limits could not be <br />determined as the effluent data is too limited or absent to determine an implicit limit. <br />Calculation of Non - Impact Limitations <br />The design flow of this facility as of September 30, 2000 was 0.101 MGD. The new design flow of <br />this facility is 0.058 MGD. To determine if new or increased impacts are to occur, the September <br />2000 permit concentrations need to be adjusted for this new design flow. The equations are shown <br />below. <br />Where, <br />September 2000 permit load Mpe,m,tted X Qpermitted X 8.34 <br />Non Impact Limit (NIL) September 2000 permitted load =New Design Flow - 8.34 <br />Mpermrrred <br />= September 2000 permit limit or implicit limit (mg/1) <br />Qpermitted <br />= September 2000 design flow (mgd) <br />Qz <br />= new or current design flow (mgd) <br />8.34 <br />Unit conversion factor <br />Table A -9 shows the results of these calculations and the determination of a new or increased impact. <br />Table A -9 <br />Determination of New or Increased Im acts <br />Pollutant <br />Sept 2000 <br />Permit <br />Permit <br />NO) <br />Sept 2000 <br />Permit <br />Load <br />(lbs /day) <br />NIL (ug /Z) <br />New <br />WQBEL <br />iug /l) <br />New <br />WQBEL <br />Load <br />(lbs/day) <br />New or Increased <br />Impact <br />As, TR (µg/1) <br />NA <br />NA <br />NA <br />0.064 <br />0.000031 <br />Yes <br />As, Dis (µg/1) <br />NA <br />NA <br />NA <br />718 <br />0.35 <br />Yes <br />Cd, Dis (µg/1) <br />4 <br />0.034 <br />7 <br />9 <br />0.0044 <br />Yes <br />Cr +3, TR (µg/1) <br />NA <br />NA <br />NA <br />106 <br />0.051 <br />Yes <br />Cu, Dis (µg/1) <br />NA <br />NA <br />NA <br />35 <br />0.017 <br />Yes <br />Fe, TR (µg/1) <br />120 <br />1 <br />208 <br />1900 <br />0.92 <br />Yes <br />Pb, Dis (µg/1) <br />NA <br />NA <br />NA <br />11 <br />0.0053 <br />Yes <br />Mn, Dis (µg/1) <br />NA <br />NA <br />NA <br />5833 <br />2.8 <br />Yes <br />Hg, Tot (µg/1) <br />NA <br />NA <br />NA <br />0.032 <br />0.000015 <br />Yes <br />Ni, Dis (µg/1) <br />NA <br />NA <br />NA <br />213 <br />0.1 <br />Yes <br />Se, Dis (µg/1) <br />NA <br />NA <br />NA <br />15 <br />0.0073 <br />Yes <br />Ag, Dis (µg/1) <br />NA <br />NA <br />NA <br />0.39 <br />0.00019 <br />Yes <br />Zn, Dis (µg/1) <br />NA <br />NA <br />NA <br />512 <br />0.25 <br />Yes <br />B, Tot (mg/1) <br />NA <br />NA <br />NA <br />2.4 <br />1.2 <br />Yes <br />Sulfide (mg/1) <br />NA <br />NA <br />NA <br />0.0064 <br />0.0031 <br />Yes <br />Appendix A (WQA v 7.0) Page 18 of 25 Last Revised Sept 14, 2009 /ES <br />