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COLORADO DEPARTMENT OF IIEA[.TII <br />Water~Quali[y Control Division <br />Rationale -Page 4 <br />Permit No: CO-0033557 <br />EFFLUENT LIr1ITATIONS, It:1'I'IOt.Al.li A.:U MUNITOItINC rlt l'.~, 1'h?iCIIiG: <br />Table 2 below denotes c•[ILw•nt limitati~ni:; Cur tiUl, ~ui2 an,l ui)~S nnJ tli.~ <br />rationale which determined the limitations. Limit•it ions and moniturinp, <br />frequencies for 004 are discussed in Apprncli:: ''. <br />CahLc _^ <br /> rl~n i tt~, i nl~. <br />Parameter Limitation Rntionnlr. I'rcrlurncv <br />pH, (s.u.) 6.5 - 9.0 c/ 4!~IS Wccl:ly <br />011 and Crease, (mg/1) 10.0 c/ til'.S tJecl:ly <br />Total Suspended Solids (mg/1) 35/70 f/ I:1''I' rLinthl~ <br />Total Iron (mg/1) 3.5/7.0 1/ R:'~'C r'nntlil: <br />Settleable Solids(m1/1) 0.5 ~~/ GAT ~lunrlily <br />Flow, MCD monitoring on ly ?:,; l:'cel I,. <br />Salinity moni[orint; un l~~ :i4 !;unrt~•rl~~ li/ <br />e/ This limitation shall apply a[ all time::. <br />f/ This limitation appl icahle to disctia r!;cs ci,u'inµ I+orind:; of ru pi oril+l itali.,n <br />and may apply to di sc~~~rges during per ir.ds ~~( rrec~i l~~i Cation. <br />g/ This limitation may apply to disch:rrl;o:. durin;•, h~.riocl:; ~,i pn,cii~it.iti~m I~.:c• <br />than or equal [o the 10-year, 24-hour ~•vunt fcr U.i; fac.i.lity. <br />h/ In compliance with the "Regulation for impLrmcntatiun ut tlic Cnlura~L, Itivcr <br />Salinity Standards Through the t\1`UfiS I'orinit 1'roV;ram", the pcrmittc~ sh.ilL <br />sample for salinit}' in the wastewater of fluff. ni on :i muntlily b:u~i~: until :;ic <br />samples have been analyzed. Therca(ter, rar~nituring stall continue •ni;, <br />quarterly basis. The Division will rovict:~ LLr fin:t :,i~ months of ~Ia[,i, aid <br />determine if a waiter of numeric Limitnl i~.nr: r.m bu l;rantccl hascd ~n iho <br />sal[-load to the river being less th;~n unr tan/dac (~•r 3'SO tons/ve:u-). !f n <br />waiver is not grantud, the• pcrmittee Ici:: :m .iJditional r;i>: months [n •:ubmit a <br />report in accordance with the Sa]ini ty Fct;nlaUuns, a,!cl ressinC•. rcnnnmic <br />feasability uC salt-rrmoval. <br />