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<br />COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 11. Permit No. CO-0000132. <br />VI. TERMS AND CONDITIONS OF PERMIT <br />The permittee should read the WET testing sections of Part I.A. and <br />I.B. of the permit carefully, and should note that the test methods <br />far the toxicity tests are described in detail in the Division <br />guidance document, Guidelines for Conducting Whole Effluent <br />Toxicity Tests. This document should be read thoroughly prior to <br />commencing the required WET testing, to ensure that [he permittee <br />is aware of the various test conditions that could affect the test <br />results (e,g., sample holding Cime). <br />The permittee should be aware that some of the conditions outlined <br />above may be subject to change if the facility experiences a change <br />in discharge, as outlined in Part II.A.1 of the permit. Such <br />changes shall be reported to the Division immediately. <br />5. Antidegradation: Pursuant to Section 3.1.8(1)Cb)(iii) of the Basic <br />Standards and Methodologies for Surface Water, an antidegradation <br />review is required for the new discharge point, 011, because the <br />receiving waters (North Fork of the Gunnison) are classified for <br />Cold Water Class 1 Aquatic Life. The parameter of concern is Total <br />Recoverable Iron. In accordance with Section 3.1.8(3), in cases <br />such as this where the new loading to the receiving waters is less <br />than 15$ of the allowable increment, the discharge is not expected <br />to cause significant degradation and no conditions related to <br />antidegradation are needed in the permit. <br />B. Monitoring and Reporting <br />1. Monitoring: Tables VI-4 and VI-5 list the monitoring requirements <br />forfor t~s ffacility, including sample type and frequency. <br />Table VI-4 - Monitoring Requirements - 003, 004, 005, 006, 007, 009 and 010: <br />Parameter <br />Measurement <br />Frequency <br />Sample Type <br />Flow, MGD <br />Total Suspended Solids, mg/1 <br />Total Iron, mg/1 <br />011 and Grease, mg/1 <br />pH, s.u. <br />Settleable Solids, ml/1 <br />Total Dissolved Solids, mg/1 <br />Weekly Instantaneous <br /> or Continuous <br />Monthly Grab <br />Monthly Grab <br />Weekly Visual <br />Weekly Grab <br />Monthly Grab <br />Quarterly Grab <br />