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CNW„p The co~c~ nlration has risen 1:$ mglC ~ over a~da~period to • 2~'~ . higher than bwe standard deviations above the mean (or 10 times the detection limit if none has been detected in the past) and shows signs of continuing the increasing trend. pH The has risen over the 9.5 s.u. same day riod to higher than standard deviations above the mean and shows signs of continuing the increasing trend. Explanatory Note: The design fluid capacity of the Valley leach facility is 94 million gallons. The normal and maximum "authorized" capacity upon which notification will be given to the OMLR is 80 percent of this volume, or on the order of 75 million gallons. The amounts of water that might be returned to the pad should the concentrations of CNW„p be in excess of that allowed are very small and therefore insignificant in comparison to these capacities and should have no material adverse affect on the status of the valley leach facility in the event of an imperfection in the liner system that allows leach solution to migrate outside the boundaries ${ ~~ the facility. ~! p-~--~A9L~J~Gt' U~~x/kdo~,ui+~~0,/uw~A ~'~^^~ ~`^.`~-t^ `^0 p°''`~ J~'`~ u~b..~tAn a Jlc-~i-o i bac,K yw~n ~tv ~ ~-. ~uwA.~, ~n~o~~C 5'o-~S9~+M ~s µnxw~~nd~.Adlnbwv~~,a~.c,,.-,arc e d.A Treatment and discharge of leaching solution: ~v~ti~~~~` Gw~.e9n~ic.~ In the event that it is necessary, based on exceedence of the listed critena w ic~combination or separately demonstrate a continuing release of leach solution to the environment from the valley leach facility, as part of the procedures to mitigate the release of leaching solution that has migrated past the boundary of the leach facility and which has migrated to or toward the permit boundary, CC&V will institute all necessary and appropriate measures to contain and detoxify all or that part of the leach solution determined to cause the continuing release. At this time CC&Y will cease additio of cyanide to, the area(s) believed to be th sourcG,of the release. C~~~~,,V,, ~ (~~i~~-f~ °'"ti aac,,m~..t fioa~'Pw.k ~b1~ ~~.t3~•uMt~x. tw-Saw.~>`6b ill. If'fcan~e shown to the satisfaction of the Office that the release is isolated to a specific portion of the heap leach facility, and that the portion of the heap leach facility can be isolated from the remaining heap leach facility with respect to cyanide solution application, the Office may give approval for application of cyanide solutions to heap leach facility areas that do not add appreciable Fluid to the area of the release. In the event [hat it is necessary and appropriate to remove solution from the Pad in order to mitigate exceedences of the Underdrain system, LDS, or ground-water criterion, the water will 6