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Part I • <br />Page llc of 19 <br />Permit No. CO-0038024 <br />S. MONITORING REOUIRP!lENTS <br />If tonicity disappears during the Phase I TRE, the permittee shall <br />submit written notification to that effect to the Division. The <br />Division may require the permittee to conduct accelerated testing to <br />demonstrate the continued absence of tonicity. If no acute tonicity <br />is found to ezist, the tonicity incident is closed. <br />6. Phase II THE <br />If a Phase II THE is required, then the follaWing conditions apply: <br />A plan for a Phase II THE shall be submitted to the Division by the <br />permittee within 60 days of notification from the Division that a <br />Phase II THE will be required. The Phase II TRE, as submitted to or <br />revised by the Division, shall be incorporated into the permit. <br />The Phase II THE plan shall include the scope, methods, procedures, <br />reporting requirements, and schedules. A Phase II THE may follow <br />either of two directions, as appropriate: tozicant treatability <br />studies, or source identification and control studies. Toxicant <br />treatability studies <br />are designed to assess the feasibility of eliminating WET via addition <br />or <br />modification of treatment processes at the wastewater treatment <br />facility. <br />Source identification and control efforts are designed to identify <br />tozicants, identify the sources of toz3caats, and control whole <br />effluent tonicity by eliminating the introduction of tozicaats into <br />the wastewater treatment facility. The Phase II THE permit conditions <br />may be amended, if so requested and justified by the permittee. <br />The Phase II THE report shall indicate the results of the Phase II THE <br />study. If the Phase II THE results in the identification of the <br />tozicants and the sources of tozicaats, the permittee shall submit for <br />Division approval a control program to control WET within 60 days of <br />discovering the cause(s) of effluent tonicity, and shall proceed to <br />implement such plan within 7 days following its approval by the <br />Division. <br />If tonicity disappears during the Phase II TRE, the permittee shall <br />submit written notification to that effect to the Division. The <br />Division may require the permittee to conduct accelerated testing to <br />demonstrate the continued absence of tonicity. If no acute tonicity • <br />is found to ezist, the tonicity incident is closed. <br />Revised 52/89 Amended <br />Doc 1003M Effective <br />