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/~uias: r1tI 15:J4 PA7C J00 7820x90 CDPIII:/H4CD _ _ _ -- ~ `~~=-~~fQ,:~00z~ i <br />~,..:~ <br />:OLORADO DEPARTMENT OF PUBLIC flEALlfl AND ENVIRONMENT', Water Quallry Control Division - - ~' <br />mtndment No. 3-Rationale. Page 3, Penrdr No. C0-0000132 ~ - : - .-~- ~~ <br />~a6k V-1-SOOndards, Lvnitadons and Mdydcal RvuUs (tentpornry outjaQ 011) ' <br />(arB'dk'aKlesa liardnva Stmtda-d Cone. Flow Flow LtmiE~tan lleaultr <br />rtherwiae noted). M3 Ml Q~ QZ M2 <br />Mtml Critvia mg/l ug/l ug/l Cfk cJs ug/l ugR <br />arsenic As-A (1R) 69 360 1 41 0.45 33068.89 <l000 T <br />As-C (IR) 69 ISO 1 4I 0.45 13725.56 <1000 T <br />Cadmitun Cd A (trout 69 2.58 0 41 0.45 237.71 <50 <br />Cd-C 69 0.85 0 41 0.45 78.07 <SO <br />Cr III G71I7-A 69 1281.43 41 0.45 118034.10 <SO T <br />Crlll-C 69 152.74 41 0.45 14069.00 <50 T <br />Cr Vl CrV! A 69 16 41 0.45 1473.78 <SD ? <br />CrVI-C 69 11 41 0.45 1013.22 <SO T <br />Copper Cu-A 69 12.50 0 41 0.45 llSl.67 na rvult <br />Cu-C F9 8.61 0 41 0.45 793.17 no result <br />fron Fe-C (IR) 69 1000 220 41 0.45 72066.67 1200 <br />:ead PfrA 69 32.65 0 41 0.45 4849.50 <700 <br />PlrC 69 2.30 0 .41 0.45 211.82 <700 <br />Manganese Mn-C (TR) 69 1000 34 4l 0.45 89013.33 <]00 T <br />Mercary lig-C (IR) 69 0.01 O.l 4l 0.45 0.01 * 0.4 T** <br />Mrkel Ni-A 69 697.79 0 4l 0.45 64274.39 no rvu/r <br />M-C 69 72.09 0 4] 0.43 6640.33 no rvulr <br />Se/mium Se-A (TR) 69 20 0 41 0.45 1842.22 <lOOO T <br />Se-C (TR) 69 S 0 47 0.45 460.56 <1000 T <br />SYlver Ag A 69 1.08 0 41 0.45 99.05 <50 <br />Ag-C(trora 69 0.04 0 41 0.45 3.65 <50 <br />Zlnc Zit A 69 85.45 4 4l 0.45 7506.66 <)00 <br />Zn-C 69 77.40 4 41 0.43 6764.75 <J00 <br />!' means an analysis for the total metal was perfvrmtd and rcpotttd <br />!'R means the Tota! Recoverable froulon of the parameter <br />!n such case. the limit <br />' The cnlatlared result was negodve. ation is set equal to the stmtdard. <br />. <br />'* The rtportable aonnmtration fur this parameter it 0.2 ugR. It is h7sely that this reported value of 0.4 ug/1 is a. false <br />positive'. T7se Divrsion wilt regain a sevand sample jot confimmtion. ' <br />]n order ro calculate water quality standard based (Itn6s jot this discharge, a mass balance analysis wat petjbrmed M <br />(he Division. The mass balanre equation is used m duermine the eFlueru conrennartons char would nor violate the ~ <br />allowable in-strtnm avncrntrations defined by the wQ stondards (except in the aue of pH, whtre rht limits are set <br />directly from strewn standards or tffluent rtgularivns without using a mass balance approach). The mass balance <br />equation is: <br />Mt o MiQ~• MiQi <br />Q: <br />