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• • PART I <br />Page 4 <br />Permit No. COG-8:0000 <br />B <br />EFFLUENT LIMITATIONS AND MONITORING REQUIRE.'1ENT5 <br />1. Effluent Limitations (continued) <br />a) Active Mining Oucfall(sj (continued) <br />ALTERNATE ~ I:tITATI0P15 <br />Any discharge or increase is the volume o: a discharge causes jv <br />precipitation within any 24-hour period less chap or equal co c`e <br />i0-vear ^_~-hour oreciaitacion event (or snowmelt of equivalent <br />volume) may comply with the following limitations subject to <br />burden of proof requirements described in Part I.B.1.d). <br />effluent Parameter <br />Flow, MGD <br />pH, standard units (minimum-maximum) <br />Oi'_ and Grease, mg/1 (No visible sheen) <br />~~ctleable Solids, m1; 1 g,/ <br />Toca1 Dissolved Solids, mg/1 <br />(Colorado River Basin Only) <br />Discharge Limitac'_ons <br />Maximum Concentration <br />Dai?•~ Maximum b/ <br />Report <br />0.5-9.0 <br />10 J <br />0.5 <br />Report <br />Total Phospho^ls (as P), mg/i Report <br />(Dillon Reservoir and Upper Bear Creek Drainages Oniy) <br />Any discharge or increase in the volume of a discharge caused by <br />precipitation within any 24-hour period greater than the i0-vear <br />2~-hour orecioitacion event (or snowmelt of equivalent volume) <br />may comply with the following Limitations subject co burden of <br />?roof requirements describd in Part I.B.l.d). <br />Flow, MGD - monitoring only per tart I.B.2.a) <br />pH shall remain becaeen 5.: and 9.0 s.u. <br />Oil and grease shall not exceed LO mg,/1. b/ ~ <br />Tocai Dissolved Solids, mgjl - monitoring only oer ?art ..3._.a, <br />(Colorado River Basin Oniy) <br />'ocal Phosphorus (as ?), mg/'_ - monitoring only per ?arc I.B.=.aj <br />(Dillon Reservoir and Gooer Sear Creek Drainages Only) <br />bl ?osr•;tining Ouc:a1?(s) <br />?osc-mining Limitations may apply co oucfalis ;erring sur:ace <br />areas which have been returned co the required contour and on <br />which -evegetacion (specifically, seeding or planting) :ork :;as <br />commenced, The oermittee maY request consideration for c:^.an2e <br />=rom acti~~e wining limitations co post-mining limitations •:hen <br />these conaicions nave been met. Eacn faci'_i~/ certification <br />~haii .,care •+net^er ac c'_ve mining or post-mining '-iWits Cons <br />aooi•i .~ each auc:oriced out=ail. <br />:tee ?arc :. ~. - for ?ou r_r.o ces <br />