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<br />Scold Hill Mill ~-deauacv Review Reeoonae jg,gt,y_,~1993 <br /> Mhtlmum WWtr WINK Ma:lmum Flow <br /> Depth Left Right Slops Flow Depth <br />Dhch Nt~tber Reac t (feet) (feel) float) (RJR) (CFSI (feet) <br />I 1 1 0 0.73 0.73 0 040 1.33 Ogg <br />l 2 L0 0"75 0 ?s 0.140 1 53 0.66 <br />2 I LO 0 73 0.?3 0.027 0.13 0.36 <br />3 1 l.0 0.73 0.73 0.021 0.33 0.63 <br />J 2 I.0 0.73 0.73 0.123 0.53 0.43 <br />c) Ted Zotieh Associates did not certify the diveryron ditches above the tailings vnpoundmrnt. <br />24. sj COM, Ino does not believe that a 2/ inch capillary bama u cost effective or necessary According to <br />Ds~~d Todd Ph.D , professor of Civil E~yyineetulg al ilea la uver my of Cabfuuua, Berkley, ui his bvvk <br />Groundwater Hvdrolo¢v. "the capillary zone eztrnds from wets table up to the lutttt of capigary rise of <br />water. Several investigators have studied the tise end distribttmn of mats N the capillary zone in terms <br />of the propernes of porotu media. "[he cspigery rise ranges from a 8action of en inch in gravel to ea <br />much as a foot in sand". The eft`wtivrnas of'weg graded rock" as a capillary barrier is only in the <br />range of a 9action of on inch to an inch. Because of this Irrruted usefulness of the gravel as a ceprllery <br />battier, we only propax to put on 2-inches of'tweg graded rook" for reclamation ar a capillary barrier. <br />bl COM, Inc. will commit to the tnatelletion of a layer of gwtexhlc fabnc over the tailing surface before the <br />rock is placed. COM, Inc. owru enough geotottile tubne to cover the tailutgs and wig stare the fabnc N <br />the mill for reclamation. hutagetian test wil! be added to the reclamation cost estimate. <br />23. The Division is con•ect that groundwater flow [area cannot be detenoined 6om the elevation information <br />fakrn form the Bureau of Mutes wills. We do not believe that anything useful would be determined by <br />doing pump testa on the omega to deterrnute Bow rates. The water table vanaROns aze infltuMed by xasonal <br />vatiatioro in the ftacttusd ¢ratita thst has very low water storage capacity. The Gold Hill mill will continue <br />to monitor and report pertinent water gttagry parameters even though the continued sampling of water has <br />shown no degradation in water quality. <br />26. COM, Inc will set W a monitoring program fM the Gold FG.U Mill with a file located et the mine end a copy <br />srnt to the Division yearly in the Annual Report. The fogowing parameters wilt be monitored end repoded <br />to the Division. <br />ParaseNr Fnarrocv e(M~ <br />e) Graundwsler quality end water tebla elewtion Quarterly <br />bl Water level artd eveilable storage capeaty in underground <br />storage reservoirs Quarterly <br />cl Undet'gtotind water atotape btdk}tead stability Quarterly <br />d) FYtnctiutslity of the taikrtga dwarf pipe Monthly <br />el Tailings impoundment 8eeboard, water balance, stability <br />o(the embankment, security, and liner integrity. Once per month while idle <br /> Weekly when operating <br />tl Tailings line 5vm mill W impoundment to aaeure it is not <br />kaldrtg Daly when operating <br /> No checks when ilk <br />g) Observations far leaiortg tanks in mill btrildirgt and other <br />containment fealihes Once per month whin idle <br /> Once per day what operating <br />h) Observe Left Hand Crock water line for Ieaks Once per tverk when opaaturg <br /> No checlu whin ilk <br />