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n <br />U <br />Pemrit No: CO-0000213 <br />Page 6 <br />DEFINI'CION OF £FFLIIENT LIMITATIONS <br />3. Whole Effluent Toxiciri Tesd Requireme is -Acute WET Testiite-Outfalls 007 008 009 011 and 012 (Contutued) <br />If deemed appropriate by the Division, the permit or the compliance schedule maybe modified m revise the ongoing monitoring <br />and toxicity investigation requirea~nts to avoid an unproductive expenditure of the pemuttee's resources, provided [list the <br />underlying obligation to elimhwte aqy continuing exceedance of the toxicity limit shall remain <br />f. Sppntaneous Disavoearance <br />If toxicity spontaneously disappears at any bate after a test failure, the pemvaee shall notify the Division is writing within 14 <br />days of a demortstrasoa of disappearance of the toxicity. The Division may require the permittee m develop and submit <br />additioml information, which may include, but is not limited m, the results of additional testing. If no pascm of toxicity is <br />identified or recuxzing toxicity is sot identi5ed, the toxicity incident response is considered closed and normal W73T testing shall <br />resume. <br />g. Toxiciri Reonener <br />This permit may be reopened and tmdi5ed (following proper administrative procedures) to include new compliance deice, <br />additioml or nrodifled numerical permit limitations, a ntw or different compliance schedule, a change in the whole effluent <br />toxicity testing protocol, or any other rnnditions related m the control of toxicants ifone or more of the following events occur; <br />i) Toxicity has been demonstrated in the e8luem and the permit does not wgmin a toxicity limitation <br />~ii) The PTI/I7E results indiwuthatihe toxicant(s)zepreseafpollumat(a)thatmaybe eoaaolled with speci5c aumezical kimits, <br />and the Division agrees that the numerical consols are the most appropriate worse of action <br />• iii) The PTIIflE reveals other unique conditions or characteristics, which, in the opinion of the Division, justify the <br />incorporation of unanticipated special conditions in the permit. <br />4. post-Minin¢ Areas <br /> <br />Co®rtcncing at the time active mining has ceased sad surface areas have been returned to the required coafou[ all applicable <br />discharges may be eligible for Imitations other than Wose specified iaPart LA.1. Thesopnst-mining limitations ahaflzrroeinineffect <br />unlit bond releases The permit[ee shall notify the Division upon cessation of active mining so thatconsideratioaofeppmpriate pemdt <br />modifications can be made. <br />B. MONITORING REQLJIRI?MENTS <br />I. Frequency and Sarrrol~~pe <br />In order to obtain an indication of the probable compliance or noncompliance with the efIlucat limmtafioffi speci5edinPartLA.1, <br />the permittee shall monitor all effluent parameters at the following frequencies. Suchrnorritorirtg willbegini~ediatelye~last <br />for the life of the permit uatess odrerwise noted. The zesults of such monitoring shall be reported on the Discharge Momtoting <br />Report form (Sec Part I.E.). <br />..~~V yBv ~a3Y <br />Flow, MGD Weekly Instantaneous or COnfltltlORR <br />Total Suspended Solids, mg/:l Monthly Grnb <br />Tam! Dissolved Iron, xng/a. ~ Monddy Grab <br />Scsteable Solids, mg/t Monthly Grab <br />Oil and Grease, mg/ Weekly Visualp( <br />pH, s.u. (Minimum-Maximum) Weekly In-aim <br />Total Dissolved Solids, mg/,1. Quarterly Grab <br />Whole Effluent Toxicity, Acute Quarterly Grab <br />AMENDED MAY 25, 2006 EFFECPIVE JULY 1. 2006 EXPII2ATTION DATE MARCIi 31.2007 <br />Attachment 2.05.3(3)-18-8 <br />