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<br />1 <br /> <br /> <br />I, <br />I' <br />G <br /> <br />i~ <br />4.4 Spent Carbon, Refinery Slag, and Used Furnace Crucibles <br />Spent carbon fines and used refinery furnace crucibles are generated from gold beneficiation and <br />refining processes. These items are shipped off site for further gold recovery. <br />4.4.1 Storage of Spent Carbon, Refinery Slag, and Used Furnace Crucibles at ADR Plant <br />The spent carbon is collected in mesh sacks and stored on wooden pallets outside, west of the ADR <br />building on the VLF lined area. The refinery slag and used furnace crucibles are stored in labeled <br />drums in the refinery area. <br />4.4.1.1 Spill Prevention, Control, and Countermeasures for Spent Carbon, Slag, and Crucibles <br />Spent carbon sacks may release material during filling or when moved. During transfer from storage <br />to a transport vehicle, spills may occur. A release of spent carbon will be scooped up and placed into <br />a spent carbon sack. <br />Refinery slag and used furnace crucibles may be spilled if a drum tips over during transfer from the <br />storage area to a transport vehicle. In the event of a release, the spilled materials will be scooped up <br />and returned to the storage drum prior to transport. <br />4.5 Lime <br />Coarse (pebble) lime is used to prepare crushed Cresson ore for leaching. <br />4.5.1 Lime Silo <br />The pebble lime silo for the Cresson Project is located along the conveyor downstream of the <br />secondary crusher. <br />4.5.1.1 Spill Prevention, Control, and Countermeasures at the Lime Silos <br />The silos are equipped with a baghouse to control lime dust. Lime is applied in a covered portion of <br />the conveyor to enhance control of fugitive dust. Accumulation of lime at the base of the silos may <br />occur during transfer from the bulk tankers. <br />A release of lime will be removed using afront-end loader or equivalent equipment. The material <br />retrieved will either be placed on the Cresson pad or incorporated into an overburden storage area. <br />Lime will be distributed onto the pad surface only when the ambient winds are light and only when the <br />lime will be rapidly mixed into the ore or overburden so as to avoid wind erosion. <br />4.6 laboratory Chemicals <br />Small quantities of chemicals used in the laboratory are stored in designated areas within enclosed <br />structures. All laboratory chemicals are handled in accordance with laboratory safety procedures and <br />are used and stored indoors in small quantities. Spills are very unlikely to escape the laboratory <br />facilities. However, spill response procedures are included in section 5.2.5 of this ERP/SPCC Plan. <br />The laboratory (lab) is located west of the existing ADR as shown in Figure 2. <br />30 <br />