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~i Cetd fldl MW 3tnrm Weser Mam~eaf P1~ Octoba~r 24,1995 chemicals when they ere added to the ore dicing processing. Wash down water currently has the potential to flow door openings. All door openings affected by wash down water or spills from tanks will have a concrete lip installed before the mill begins operations again to prevent wash water end tank spills from leaving the building. All floor drains in the building are piped to the tailings pond. Tailings mtd process water from the thickener are piped from the mill building to the tailings pond in a buried pipe to the tailings pond. The tailings pond is lined with a high density polyethylene liner to contain all tailings end process water. Thera is a potential for a spill if the tailings Brie is kept too close to the top of the tailings pond embankment end there is s break in the spigoting line. The tailings spigoting line will be kept off the top of the emberrlnneM and on the inside of the tailings emb~ekment. All oils and greases ere stored in the mill building in closed containers. Diesel fuel fair the equipment is brought in portable tanks in picktrps or a portable fuel trailer. Thera is some potential of spills of fuel end lubricating oil while mainro+n;n9 vehicles in the meintenarrce area There is also a potential for creating suspended solids from the use of an uttpaved area All stone water in this area northeast of the mill (Area 3) is directed to the sedmtent trap in Area 4. The outslope of the tailings pond, topsoil storage piles, end a disturbed area southeast of the mill have a potential for adding suspended solids to storm water runoff. The areas have been revegetated to decroase the potential for developing suspended solids during storms. In addition, a sediment trap is located at the bottom of the roadway east of the tailings pond and southeast of the mill building to contain suspended solids drtring stotms_ Storm water from the tailingi pond is decanted from the tailings pond through a 2-in. diameter pipe to the F3aae1 A mine edit below the tailings ptm~ The water.is stored behind the bulkhead for reuse es process water in the mill. A break in flee decant line or rettrrn process line could release waters that might contain heavy metals or dissolved solids.. SIGNIFICANT SPII.LS Bt LEAKS OF TOXIC OR HAZARDOUS SU19$TAPICES Dabs S III or Leak date Oil spilled on ground in compressor shed on northeast side of milt building. All oil saturated unknown soil is bein rerrroved: 13/94 Tailings line broke on failings embankment allowing milings m flow down oublope of tailing embankment Approximately 50 gallons of tailings were involved. The Iltte was repaired and tailin s sands were cleaned u and rebrmed m the tailin s d. 8/95 Water shred in Hazel A adR leaked through bulkhead and flowed down Cash Guth. Unknown Quantity of water discharged. Bulkhead repaired, and a secondary colter dam and pump installed to contain any leakage tram bulkhead. Leakage water periodically pumped back behind the bulkhead. 10/11/95 Water shored in Hazel A adR siphoned through suction line in the secondary pump beck sysbam and flowed down Cash Guleh. 200 to 500 gelbns of water were involved. Suction line >b be removed attar um in .