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The Lead lle Mill M 1990-057 <br /> EXHIBIT C—MILL PLAN <br /> Page 4-12 <br /> Xanthate T89 939A 4446 256I( FU FH) 2 dFUFAS <br /> PlfleGil 4a i9696 746 286 119(dFUR14 2 dFUFAS <br /> Fleeewlen+ e/a 95% 1.3 lb 286l*um) 1 dFUFFR5 <br /> r,..peF S..ic...-..,, C+6G4 19096 32-Ib b84+ba94 &43t <br /> No less than 9 en of lime will be a site at anygiven time fee PUFpeses of dete)(ifeeatien <br /> 8 <br /> stli33p built inte the EenEFetefleef-at the leweFend of the mill .The Eentainmentt-Sump <br /> TSF facility. <br /> 4.2.5 SOLUTION MANAGEMENT <br /> Spill containment in the mill building will be accomplished by; first localizing <br /> containment and clean-up, and second by directing any remaining spill to the sump <br /> build into the concrete floor and located at the lower end of the building. I,,,—the <br /> the walls aFe sealed to the base-ef the sump. <br /> Liquid quantities of reagent in use at one time are small (see Table 4-) to minimize risk <br /> due to spillage and waste. Chemicals not needed immediately, will be stored in Over- <br /> pack Barrel containers. The reagent mixing area is at the fine ore bin level. Any spillage <br /> not cleaned up at the source will be washed down to the sump. If chemical laden <br /> water gets to the sump, it can be pumped up to the tailings trough which will flow to <br /> will be pumped to the TSF (see Figure 6-2) to mix and dilute with the water decanting <br /> from the tailings in-the TSF.9 <br /> Operation solution volumes are summarized in Table 4-11. Primary containment, <br /> representing tanks and facilities used in the operation, amounts to approximately <br /> 14,000-328,900-gal. Secondary containment consists of the sump and is located at the <br /> lower level of the mill building. The sump area can hold about 69A 5,000gal of the <br /> tanks and facilities located within the mill building. In the event of 100% primary <br /> containment failure, the TSF will serve as the tertiary containment facility. The <br /> maximum capacity of the TSF assumes a 3ft freeboard. The first 1ft of the freeboard <br /> (500,000ga!} 425,000 gal represents the tertiary capacity of the TSF. Tertiary <br /> containment therefore, represents over 35 times all primary containment facilities.10 <br /> 8 A1AR1Q43 <br /> 9 A1AR1Q9 <br /> 10 A1AR1Q13 <br />