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COLORADO DEPARTMENT OF PU13L1C HEALTH AND ENVIRONMENT, Water Qualiry Corurof Division Rationale -Page 14, Permit No. C0~0000221 d. Comoreheuive Facility Insoections: The permittee will be required to make a thorough inspection of their stormwater management system, at least twice per year (irt the spring and jal!). These inspections must be documented and sunvnarized in the annual report. (See Pan /.D.1.e. and f. of the permit.) e. Annual Renort: The permitree will be required to submit an annual report, covering January 1 through December 31 of eao5 year, on the overall compliance x~ith the SWMP. 5. Economic Reasonableness Eva[uatiun: Section 25-8-503(8) of the revised (June 1985) Colorado Water uati Control Acr required thr Division to "determine whether or not any or al! of the water quality standani based effluent limitations are reasonably related to the economic, environmental, public health and energy impacts to the public and affected persoru, and are in furtherance of the policies set forth in sections 25-8-192 and 2.5-8-104. " The Regulations jot the State Discharge Permit System, 6.1.0, jurrher define this requirement under 6.12.0 and state: "Where economic, environmental, public health and energy impacts to the public and affected persons have been considered in the ciassificatioru and standards setting process, permits x~ritten to meet the standards nary be presumed !o have taken into consideration economic jactors unless: a) Anew permit. i.s issued where the discharge was nor in existence at the time of the classification oral standards rulemaking. ar b) In the case of a continuing discharge, additional information or factors have emerged that were not anticipated or considered at the time of the classiftcation and standards rulemdcing. " Furthermore, this is nor a nex~ discharger and no new information has been presented regarding the cl[:ssificatiorts oral standards. Therefore, the ware." gualin~ standard-based efflueru limitations of this permit are determined to be reasonably related to the economic, environrrtemal, public health and energy impacts [a [he public and affecter' persons and are in furtherance of the policies set forth in Sections 25-8-102 and 704. !f the permittee ,lisagr~ this finding, pursuant 10 6.12.0(2)(6) the permittee should submit all pertinent information to the Division du: i..,; . e public notice period. B. Monitoring Effluent Monitoring: Effluent monitoring will be required as shorn in Ta61es VI-9 [hrough VI-I1. Refer [o the permit for locations of monitoring paints. Table VI-9 -Monitoring Requirements jot Outfa[ls 002, 003, 005', 006, O70 and 011' Parameter Measurement Frequency Sample Type flow, MGD Weekly Instantaneous or Continuous TSS, mg/f Monthly Grab Total Iron, mg/f Month/}~ Grab Settleable Solids, mf/F Monthly Grab Oil and Grease, mg/1' Weel:ly Visual a/ pH, s. u. Weel:l}' In-situ 7DS, mg/F Quarerh• Grab Whole Effluent Toxicity. Acute Outfalls 002 and 003 Annually Grab Outfalls 005, 010 and 011 Quarterly Grab