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Caid HBI MW Storat Waaer Maaapaeat PIS Oetaber 24, 1943 chemials when thry are added to the ore during processing Wash down water currently has the potential to flow door openings, All door openings affected by wash down water or spills firm tanks will have a concrete lip installed before the mill begiru operations again to prevent waatt water and tank spills from leaving the building All floor drains in the building are piped to the tailings pond Tailings and process aster fiom the thidtma ate piped from the mill building to the tailings pond in a boned pipe w the tailings pond. The tailings pond is timed with a high density polyethylene liner to contain ell tailings end proceu water. There is a potential for a spill if the tailings line u kept too close to the top of the tailings pond embarrl®errt and thers is a break N the spigoting line. the tailings spigotireLt line will be leapt off the top of the embrfftkrttent artd on the vuide of the tailings mrtbanlanent All oils and greasd ere stored in the mill building in closed container. Diesel fuel fair the equipment u brought in portable tetks in pickups a a portable fuel trailer. There u some potenrial of spills of fuel and lubricating oil while maintaining vehicle in the meirttatartce area There is eLw a potential for crcgting suspended solids fi+om the use of an unpaved area All storm water in this area rtaatlteast of the trill (Area 3) w directed W the seditttertt trap in Area 4. The otaslope of the tailings pond, trrpsoil storage Piles, and a distuttied area southesa. of the mill have a potential for adding suspended solids to slam water nmoff. The arm have beat revegetatad W decease the potential fa devetopittg suspended solids during storau. in addition, a sediment trap u located a< the bottom of the roadway east of the tailings pond and southesst of the mill building w amtsin suspatded solids dttrirtg stortm_ Storm walla tiom the tailings pond is decanted fre® the tailings pond through a 2-ia diameter pipe to the f3aael A mime edit below the tailvtgt paid: The wale is stored behind the bulkhead fa. rstne a process water in the mill. A bralc in the decmtt line a return prt>cess line could releax wetas that might contain heavy metals a dissolved solids. SIGPITFFICAIVT SPILLS dE LEAKS OF TOXIC OR HAZARDOUS SUBSTA,iVCES Dab II or Ltak date Oil spilled on Around in compressor shed on northeast sire d mil4building. All dl aabrratsd unknown loll iebsi rerttored. 8J94 Tailings line broke on tailings embankment allowing tailings bo flow down outsbps of tailing embankment Approximately 50 gallons of tailings wsro irnohrod. The Ilne was repairod and trill sands were cleaned u and robrmed m the twill d. t185 Water stored in Hazel A edit leaked thraph bulkhead and flawed down Cash Guk:h. Unknown quantity of worst discharged. Bulkhead repaired, and a aeoondary coffer dam and pump installed to contain any leakage hem bulkhead. Leakage water periodkaly pumped back behind tits bulkhead. 1Ur17/96 Water stored in Hazel A edit siphoned tltnxrgh suctlon line in tits secondary pump back system and flowed down Cash Gulch. 200 to 500 galkxra d water were irr~olvsd. Suction line to be romwed after min .