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COLOIUDO DEPARTMENT OF PUBLIC HEALTHAND ENVIRONMENT, Wnter Quality Control Division Rniiortale -Page 8, Permit No. C0.0027l46 considered in the classifications and standards settingprocess, permits written to meet the standards may be presumed to have taken into consideration economic factors unless: a. Anew permit is issued where the discharge was not in existence at the time of the classificah'on and standards rulemaking, or 6. In the case of a continuing discharge, addih'onal information or factors have emerged that were not anticipated or considered at the time of the classification and standards rulemaking." The evaluation jot this permit shows that the Water Quality Control Commission, during their proceedings to adopt the Classifications and Numeric Standards for Lower Colorado River Basin. considered economic reasonableness. Furthermore, this is not a new discharger and no new information has been presented regarding the classifications and standards. Therefore, the water quality standard-based effluent limitations of this permit are determined to be reasonably related to the economic, environmental, public health and energy impacts to the public and affected persons and are in furtherance of the policies set forth in Sections 23-8-102 and 104. If the permittee disagrees with this finding, pursuant to 61.1/(b)(ii) ojthe Colorado Discharge Permit System Regulations, the permittee should submit all peertinent information ro the Division during the public notice period B. Monitoring Effluent monitoring will be required ar shown in Tables VI-3, YI-6 and VI-7. Refer to the permit for locations of monitoring points. Table V/-S-Mortitoring Flow, MGD TSS, mg/l pH, s.u. Oil and Grease, mg/! TDS, mgA WET, Acute* Iran, Total, ugA Once per Week Once per Month Once per Week Once per Week Once per Quarter Once per Quarter Once oer Month Outfn!!s 001, 002, 016 Instantaneous/Continuous Grab In-Situ Yisual ** Grab Grab Grab 'Ouija[! "RSMW" is established as [he oulfall jot acute WET testing. This outfall is equivalent to a composite sample consisting of one grab sample ench from Outjnl[s 001, 001, and 016, ns applicable, and proportioned to flow. This outfal! was established as part ojthe currerst permit and is carried through as part ojthis permit. •*Ijo visible sheen is nate~[ a grab sample shall be collected and analyredfor oil and grease. The results are to be reported on the DMR under parameter 03581. -Monitortne Requirements (or Outfalls 003. 007. 008. 009. 0/0. 01l. 014 FIow,MGD Once per Week Instantaneous/Continuous TS$ mg/1 Once per Month Grab pH, s.u. Once per Week In-Situ Oil and Grease, mg/1 Once per Week Visual * TDS, mg/1 Once per Quarter Grab Iron, Total, ug/1 Once per Month Grab Settleable Solids, m1/l Once per Month Grab 'Ijo visible sheen is no[ed, n grab sample shot! be collected and nnn[yaed for ail and grease. The resadu are to be reported ort the DMR under parameter 03582. J Las[ Revised: 1!/3/2003