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• COLORADO DEPARTMENT OF HEAL1'11 <br />Water Quality Control Division <br />Rationale - Page 5 <br />Permit No: CO-0033553 <br />DISCUSSION: <br />1. Total suspended Solids - ii.!'.A. promulpa[ed BAT regulations on November <br />26, 1982, but BCT (Iles[ Cuuv~•ntinnal Pollutant Control Technology) is <br />being reserved pendin!•, fin::llzatiun of EPA's BCT cost methodology. <br />Theref.oce, BPT shall apply. 'l'he SP.S limitation is not applicable pursuant <br />to Section 10.1.3(3) of the State Regulations for Effluent Limitations, <br />which states that when EPA has effluent limitations or an industry, the <br />federal limitations shall take yrecedence. <br />2. Alternate Limitations - As indicated in other sections of the rationale, <br />some effluent limitations for outfall 001 are or are not effective, <br />dependent on occurrences of precipitation. Pages la and lb of the permit <br />indicate when specific limitations apply. In order for the permittee to <br />claim a "storm exemption" from the total suspended solids and total iron <br />limitations, documentation of tl:e eligible storm event must be submitted <br />[o the division along with [he appropriate discharge monitoring report <br />(DMR). <br />3. Materials Containment Plan - Pages G and 7 of the permit describe the <br />Materials Containment Plan (MCP) which is a requirement of all <br />permittees. If a Spill Prevention Control and Countermeasure (SPCC) Plan <br />has already been submitted by tl:c permittee and approved by the Division, <br />submittal of an annual update to this plan will satisfy the MCP <br />requirement. <br />4. Reopener Clause - This permit may he reopened and mod if led as discussed in <br />Part II.B.S if there is a significant change in state or federal water <br />quality regulations, ~i significant cf:ange in operation at the facility, or <br />at the request of the permittee. <br />Don Helmer <br />May 10, 1985 <br />Upon issuance of this amendrarn: and renewal, the conditions of this permit <br />shall supersede the conditions ni the permit issued September 8, 1982 and <br />scheduled to expire t4sr~.h `sl, !957. 1'he new permit contains current permit <br />boilerplate pages and forr..at. <br />Don Ilolmer <br />September S, 1985 <br />