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r~ LJ H. MONITORING REQDIREMENTS 7. Phaee II TAE (Continued) art I age lh of 19 Permit No.: CO-0032751 Source identification and control efforts ars designed to identify toxicant e, identify the sources of toxicants, and control whole effluent toxicity by •liminatinq the introduction of toxieant^ into +:he wastewater treatment facility. The Phaee II THE permit conditions may be amended, if so requested and justlfiad by the permittee. The Phase II TR8 report shall indicate the results of the Pl~asa II THE study. If the Phase II THE results in the identification of the toxieant^ and the source^ of toxicants, the permittee shall submit for Division approval a control program to control WET within 60 days of discovering the cause(s) of effluent toxicity, and shall proceed to implement such plan within 7 days following it^ approval by the Division. If toxicity disappears during the Phaee II TRE, the permittE+e shall submit written notification to that •ffeet to the Division. The Division may require the permittee to conduct accelerated tE~eting to demonstrate the continued absence of toxicity. If no acute toxicity is found to exist, the toxicity incident ie closed. 8. Control Prooram If required pursuant to Parts I.B.of this permit, the permittae shall develop a control program to eliminate WET, through the identification and elimination of any toxicants or toxieant aources responsible for WET, or through the identification of toxicant treatability processes. The control program, along with any cost/benefit analysis tc determine whether the costa of construction bear a reasonable relationship to the resulting benefits, shall be submitted within the specified time frames. Such eoet benefit analysis shall be used in accordance with Section 25-8-503(8) and (9), C.R.S. The control program, ae submitted to or revised by the Division, may be incorporated into the permit. A control program may include, but shall not be limited to: additional pretreatment requirements imposed on specific indirect parmitteae by POTW's, modification of internal source control programs by industries, modifications of treatment plants, and/ar beet management practices for spills, hake, etc. 9. Toxicity Incident Closure If WET ie controlled through implementation of numeric limits for specific toxicants, through a control program eliminating toKicanta from the waste stream, or through the implementation of treatment processes, or if WET disappears and Division required accelerated testing demonstrate the continued absence of toxicity, the toxicity incident shall be considered closed. Revised 5/2/89 Doc 1003M