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<br />H. HONITORING REQUIREMENTS <br />6. Phase I THE <br />• Part I <br />Page lg of 19 <br />Permit No.: CO-0032751 <br />The Phase i THE performed by the parcoittee shall be in general <br />accordance with Methods for Arnlatic Toxicity Identification Evaluations, <br />Phase I Toxicity Characterization Procedures (September 1988) published <br />by EPA, or in accordance with procedures approved by the Division. If <br />only one species demonstrated toxicity during accelerated testing, then <br />that species alone may be used in the Phase I TRE. The permittee has 45 <br />days from the submission of the final report on the preliminary toxicity <br />investigation to complete the Phase Z TRH and submit a report to the <br />Division on the results of the study. <br />If the Phase I THE identifies a probable toxicant and/or a probable <br />source of toxicity, the permittee shall submit written notification to <br />that effect to the Division as part of the report. Within 30 days of <br />completing the Phase I TRE, the permittee shall submit for the <br />Division's approval a control program to control WET, and shall proceed <br />to implement such plan within 7 days following approval by the Division. <br />If the Phase I THE fails to identify a probable toxicant and/or a <br />probable source of toxicity, the permittee shall notify the Division of <br />its findings. The Division will determine whether a Phase II THE is <br />applicable. <br />If toxicity 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 toxicity. If no acute toxicity ie <br />found to exist, the toxicity incident is closed. <br />7. Phase II THE <br />Zf a Phase II TAE is required, then the following 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 Phase <br />II THE will be required. The Phase II TRE, ae submitted to or revised <br />by the Division, may 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 TAE may follow either <br />of two directions, ae appropriate: toxicant treatability studies, or <br />source identification and control studies. Toxicant treatability studies <br />are designed to aeseae the feasibility of eliminating WET via addition or <br />modification of treatment proceaeee at the wastewater treatment facility. <br />Revised 5/2/89 <br />Doc 1003M <br />