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% •~ ~ <br />ACZ <br />Ms. Aaae lhlmfddc <br />September 10r 1992 <br />Pace Two <br />All runoff from disturbed area within the mine ate is directed throuih easistie~ sedimmatioa <br />ponds. Ia compliaaa with the permit roquiremean, the ponds wat: desipsed sad aonstruaed <br />co retain the runoff psterated duriai a 14~ar, 24-hour predpitasioa eras. For addidoml <br />sedimmc comrol, the ponds were also deapted to praride a minimum runoff detendoa time <br />of 24 hours Diadtaria from the poach paaall~ ooatr is the sprioi from the aoaanaotu <br />inflow of mowmdt runoff or, after was ha aacvmuhted is the ponds ova time sad a norm <br />ereru coatis <br />Followirti wnstnution, each sedimmntioa pond ha bem intpetsed on a gttaetal~ bais for <br />structural intepit~, erideaa of notion, water sad sedimem knelt, sad outflow aooditioas <br />Copies of the iaspatioa report: bare bem Sled with the Colorado Mlaed Iand Redamatioa <br />Divisor (CblI1tD). Our renew of chase reports indiata that prior to and after the TSS <br />rioladons ooatrred a the mine, sediment kreb is the three affaaed ponds were below the <br />desipted maximum sediment kreb and tbadore was is aompliaooe with permit aoaditiont. <br />Sediment has bem tdeaaed out of one of the poodt, Poad D, is Auptst sad December of 19p <br />and :pia is Jaattar~ 19ti. The volume of tedimmc snored wa recorded oa production <br />reports tha are prnmted is Aaarhmers A for dour rdereaoa <br />It u our tmdaacaadini is dkini with IiEr. >Cubic that iE a 155 limitation aempdoa is pasted <br />to the asiae, I{err would mill be required to monitor for TSS at the tpedfied outfall lotaeioos <br />Hower:, eunoff would become subject to a settkabk solids limitation aE f1.S mi/1 (daily <br />maamttm ralue~ rather than the exiaiai limitations for T55. Aaoordia~, the disrharte <br />moaicorin~ reports Prodded to Il;rrr from the ®H world need to be asodifled to include <br />setclnbk solids. <br />Hopefully this later proridn dots with adequate dotatmentation to perm the Seer I1iine a T5S <br />limiation ettmptioo. Please aomact the uadaapted with a~ questions or to requnt <br />additional information. Il;err is committed to ~^nfi thin issue and mainainirt~ Permit <br />aompliaooe. <br />Sincsrel», <br />AQ la< <br />Rich Iitsccdl <br />Project Geot~emist <br />RTI3:®e <br />attachment <br />C~ <br />~~roaxvsroe.ia <br />anv+r fir <br />