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Part I <br />Page lk of 19 <br />Permit No. CO-00321].5 <br />B. MONITORING REQUIREMENTS <br />11. ~^ontrol Program <br />If required pursuant to Part I.B of this permit, the permittee shall <br />develop a control program to eliminate WET, through the identi.Eiczition <br />and elimination of any tozicants or tozicant sources responsible :Eor <br />WET, or through the identification of tozicant treatability <br />processes. The control program, along with any cost/benefit analysis <br />to determine whether the costa of construction bear a reasonable <br />relationship to the resulting benefits, shall be submitted within the <br />specified time frames. Such cost benefit analysis shall be used in <br />accordance with Section 25-8-503(8) and (9), C.R.S. The control <br />program, as submitted to or revised by the Division, may be <br />incorporated into the permit. <br />A control program may include, but shall not be limited to: <br />additional pretreatment requirements imposed on specific indix•ect <br />permittees by POTW's, modification of internal source control programs <br />by industries, modifications of treatment plants, and/or best <br />management practices for spills, leaks, etc. <br />12. Tonicity Incident Closure <br />If WET is controlled through implementation of numeric limits for <br />specific tozicants, through a control program eliminating tozicants <br />from the waste stream, or through the implementation of treatment <br />processes, or if WET disappears and Division required accelerated <br />testing demonstrate the continued absence of tonicity, the tonicity <br />incident shall be considered closed. <br />If the permittee completes all required phases of the tonicity <br />incident response specified in compliance schedules, and is unable <br />either to identify the causative tozicants and their sources or to <br />identify feasible treatment options, the permittee may petition the <br />Division for relief from further investigation and testing, consistent <br />xith the permit regulations. <br />Revised 5/2/89 <br />Doc 1003M <br />