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COLORADO DEPARTMENT OF HEALTH. Water Quality Control Division <br />Rationale - Pnge l7, Permit No. CO-0034/42 <br />n) Anew permit i.c trcued where the di.rehnrge was not in existence at the time ojthe classification and .standards <br />rulemnking, or <br />h) /n the case of n continuing di.cchnrge. ndditiorurl information or factors hm~e emerged durJ were not anticipated <br />or considered nt the time of the clnesificntion and standards rulemaking. " <br />The evaluation jor this permit.rhow.c that dre Water QunliN Control Commi.c.rion, during their proceedings to adopt <br />the Classification and Numeric Smndurds for the Lower Colorado River Bn.cin, considered economic <br />renronableness. <br />Furthermore, this is not a new discharger and no nex~ information {rnc been preserved regarding the cln.ccificutionc <br />and standards. Therefore, the water qualiro smnrlard-bared effluent limitations of this permil are determined to be <br />renconably related to Nee economic, environmental, public health and energy impacte to the public and affected <br />peeconc and are in furtherance of the policies set josh in Sections 15-R-102 and 104. /f the permiuee disagrees <br />with tlri.c frnding, pursuant to 6. /2.0(2)(h) the permutee should suhmir rrll pernnent informndar to tl+e Division <br />during the public notice period. <br />B. Monitoring <br />1. ln/luent and E(Ruent Monitoring: Influent and effluent monitoring will be required ns.chown in Tahles Vl-7, V/-8 <br />and V/-9. Refer to the permil jor locations of monitoring points. <br />Table VI-7 -Monitoring Requirements (Oulla!ls 004, 007, 009, 011 - 011) <br />Parameter Measurement Frequency Sample Type <br />Flaw, rLIGD rLlorrddy /rrctunlarreouc <br /> or Continuous <br />Oil and Grease, mg/J Weekly Visual' <br />pH, s. u. Monthly Grub <br />TDS, mg/C Quarterly Grnh <br />Senleahle Solide, m~/~' A-lonthly Grnb <br />Table V/-8 -- Monitoring Requirements (Outjalls 003, 022, and 024) <br />Parameter Measurement Frequency Sample Type <br />Flow, kfGD Weekly /n.ctantaneou,c or Co.ntinuauc <br />TSS, mg/~ Two/Month Grnh <br />Oil and Grease, mg/J Weekh~ Vi.cunl" <br />pH..c. u. Weekly Grub <br />TDS, mg/~7 Quarterly Grnh <br />WET. Chronic Quarterly 3 Composue/Te.rt <br />/ran (TRJ, mg/J Monthly Grnb <br />Zinc (TR), mg/J Monddv Grnb <br />TR - Total Recoverable fraction <br />/f o vi.rih/e sheen i.c noted n grub sample shall be collected and anulv_ed fm' oil and gren.ce. The results m~e to he reported on the <br />Dti1R under purnnerer 00556. <br />