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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Raionale -Page 21, Pcmut No. CO-0034142 <br />The evaluation jor this permit shows that the Water Quality Control Comnussion, during their proceedings to adopt <br />the Classf~ation and Numeric Standards for the Lower Colorado River Basin, considered economic <br />reasonableness. <br />Furthermore, this it not a new discharger and no new information has been presented regarding the classifications <br />and standards. Therefore, the water quality standard-based ejJluent !imitations of this permit are determined ro be <br />reasonably related to the economic, environmental, public health and energy impacts to the public and affected <br />persons and rue in furthtrance of the policies stt forth in Sections 15-8-102 and 104. Ij the permiaee disagrees <br />with this finding, pursuant ro 6.12.0(2)(6) the perminee should submit all pertinent .information to the Division <br />during the public notice period. <br />B. Monitoring <br />1. Influent and Effluent MonitorinP -Influent and e,Qluent monitoring will be n~quired as shown in Table <br />V/1-3. Refer to the permit jor locations of monitoring points. <br />Table VI-7 -Monitoring Regrtinments (Outjalls 003, 022, and 024) <br />,. :, :.. <br />Parainetec:.. :.' :.:..:..:.::..: ::.:... :.:, .Measurement.Frequeacy.. .Sample Type. <br />Flow, MCD 1/week Instantaneous or G~ntinuous <br />7SS, mg/1 2/month Grab <br />Oil and Grease, mg/I 1/week Visual" <br />pH, s. u. 1/week Grab <br />7DS, mg/l 1/quarter Grab <br />Biomoniroring, Acute 1/quarter Grab <br />(Outfal(s 022, 024 only) <br />Biomonitoring, C7rronic 1/quarter Composite <br />(Outjall 003 only) <br />Iron (PD), mg/! 1/week Grab <br />Zinc (TR), mg// 2/month Grab <br />PD -Potentially Dissolved <br />TR - Tora! Recoverable <br />* If a visible sheen is noted, a grab sample steal! 6e collected and analyzed for oil and grease. The resulrc are <br />to be reported on the DMR under parameter 00556. <br />