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<br />Cripple Creek & Victor Gold Mining Company Exhibit U <br />Cresson Project Amendment 13 <br /> 4 <br />Chemical <br />Name <br />Use at the Site Location <br />for Use <br />Location for <br />Storage <br />Typical Quantities Used and/or Stored on Site Secondary Containment Provided Fate of Chemical <br />event of release. Outside of concrete containment releases <br />would flow onto VLF liner systems. <br />Hydrochloric Acid Used to acid wash <br />carbon in carbon <br />columns in the <br />ADRs. <br />ADRs Stored in mixing <br />tanks at ADRs. <br />Stored inside ADRs <br />in holding and <br />concentrated tank <br />At each of the ADRs: <br />- 8,200 gallons stored in mixing tank <br />- 7,000 gallons in holding tank <br />- 8,000 gallons in concentrated tank <br />Mixing tanks are double walled and within concrete containment <br />outside of ADRs. <br />Holding and concentrated tank are within the ADR containment <br />including concrete floor and curbing with sumps and pumps. All <br />is underlain by liner that drains to VLFs. <br />Acidic solutions that have become <br />neutralized through rinsing of the <br />carbon and are no longer useable, <br />are added as make up water to <br />process solutions. <br />Potassium Amyl <br />Xanthate <br />Used in the <br />flotation circuit <br />HG Mill <br />facilities <br />Covered storage on <br />containment outside <br />of the HG Mill <br />building <br />Anticipated shipment of 4 trucks/year of 20 tons/truck <br />Shipped in barrels typically containing about 300 pounds <br />at 10% xanthate <br />700-gallon collector mix tank <br />700-gallon collector storage tank <br />Concentration @ 0.07 lbs. per ton of feed ore <br />Primary containment is barrel and secondary containment is the <br />concrete pad on which the barrels are stored. Tertiary <br />containment is the liner system underlying the HG Mill platform <br />that will drain to the VLF2. <br />Gets carried with floated material <br />in the froth and then is destroyed <br />in process solutions with the <br />addition of lime and sodium <br />cyanide. <br />Dithiophosphate Combines with <br />xanthates to float <br />the gold in the <br />flotation circuit <br />(particularly <br />effective for native <br />gold) <br />HG Mill <br />facilities <br />Stored within <br />containment inside <br />HG Mill building to <br />prevent freezing <br />Anticipated shipment of 4 trucks/year with 20 tons/truck <br />Shipped in totes of approximately 1800 pounds each <br />Concentration @ 0.07 lbs. per ton of fee ore <br />Primary containment is tote and secondary containment is the <br />concrete floor and curbing within the HG Mill building where the <br />totes will be stored. Tertiary containment is the liner system <br />underlying the HG Mill platform that will drain to the VLF2 <br />Gets carried with floated material <br />in the froth and then is destroyed <br />in process solution with the <br />addition of lime and sodium <br />cyanide. <br />Frother Used to form stable <br />bubbles for floating <br />the gold in the <br />flotation circuit <br />HG Mill <br />facilities <br />Stored within <br />containment inside <br />HG Mill building to <br />prevent freezing <br />Anticipated shipment of 2 trucks/year with 20 tons/truck <br />Shipped in totes of approximately 1800 pounds each <br />Concentration @ 0.01 lbs. per ton of feed ore <br />Primary containment is tote and secondary containment is the <br />concrete floor and curbing within the HG Mill building where the <br />totes will be stored. Tertiary containment is the liner system <br />underlying the mill platform that will drain to the VLF2 <br />Recycled with water from flotation <br />circuit, eventually breaking down <br />into non-toxic forms. <br />Notes: 1. Tanks sizes are approximate <br /> <br />