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The SGADR will include four carbon -in- column trains. The system is designed to handle flow <br />of approximately 19,000 gpm, but it is expected that on average approximately 16,000 gpm <br />would be processed through the system. Figure 8 -2 shows a typical flow diagram for the <br />SGADR and associated SGVLF. <br />The same chemicals and additives used at the AGADR would be used at the SGADR. The <br />materials used at the SGADR will be shipped to the site by truck and will be stored at the <br />SGADR facility. Sodium cyanide will be shipped in briquettes and the activated carbon will also <br />be shipped as a solid. Hydrochloric acid and sodium hydroxide will be shipped in liquid form. <br />All storage of SGADR reagents will be within the bermed concrete containment as the primary <br />containment, underlain by the PSSA liner system as secondary containment. The materials to be <br />used at the SGADR will include the following materials. <br />Activated carbon will be used in the adsorption process to pull gold from solution and <br />reactivated, as needed, by burning at high temperatures using the SGADR reactivation kiln. The <br />activated carbon will be shipped in bags and will be stored outside of the SGADR building. <br />Hydrochloric acid will be used in a dilute form to remove scale that builds up on the carbon from <br />the pregnant solutions and will be disposed by neutralizing with sodium hydroxide and adding to <br />the makeup water for the barren solution. The acid will be delivered by tanker trucks to the <br />SGADR. It will be stored in a Fiberglass Reinforced Plastic mixing tank of approximately 8,000 <br />gallons located within concrete containment outside of the SGADR building. The tank will be <br />equipped with an acid scrubber to remove any acid vapor that would be released during filling or <br />tank expansion due to high ambient temperatures. <br />Sodium hydroxide will be used to neutralize hydrochloric acid solution prior to reuse of the <br />water for makeup water and also will be used to maintain the pH levels above 10 during carbon <br />stripping. The sodium hydroxide will be delivered by tanker trucks and will be stored within the <br />concrete containment area in a tank of approximately 20,000 gallons located outside of the <br />SGADR building. <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension 2 <br />8 -5 <br />