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• 5.3.1.5 Mayflower Waste Water Treatment Plant (MFWWTP) <br />The MFWWTP is used as a control, monitoring, and reagent storage facility for final treatment of <br />water prior to dischazge into Ten Mile Creek <br />ChemicaL• Sulfuric acid (HZSOa). <br />Description: Sulfuric acid is a corrosive chemical which is used to adjust the pH of treated <br />water to pH 7 prior to dischazge to Ten Mile Creek. Sulfuric acid weighs 15.3 lbs/gallon. <br />Location: Sulfuric acid is stored at the Mayflower Waste Water Treatment Plant (MFWWTP) in <br />a 10,000-gallon tank. <br />Spill Potential: Moderate when transferring acid from delivery tanker to storage tank. <br />Potential Volume Spilled: Up to one truckload (approximately 3000 gallons). <br />Prevention and Control: Operator caze when unloading the transport truck is the most <br />important factor in prevention of a spill. Climax' policy of requiring a company employee to be <br />present when unloading is also of key importance. A concrete containment structure capable of <br />holding 7,860 gallons of acid surrounds the tank inside the MFWWTP. In addition, drainage and <br />• collection sumps are located inside the building to contain spills or leaks (Volume = 8,000 <br />gallons). These structures aze pumped periodically to remove drain water and to maintain <br />capacity of containment. Outside at the unloading area, the coupling valve is housed within an <br />enclosed concrete vault to protect from "instantaneous uncouplings" during off-loading. Also, <br />the parking lot is "canted" away from Ten Mile Creek and slopes gently towazd the building to <br />prevent spilled acid from running to the creek. Recently (2003) the parking lot where unloading <br />occurs has been re-paved, thereby providing another safety factor to prevent spills from reaching <br />the creek. <br />Countermeasures: Kiln dust is stored outside the MFWWTP on the north side; can be used for <br />neutralizing acid spills by building containment dikes around the spill. For lazger spills, there aze <br />60 bags of sand available in the MFWWTP, which can be used to build dikes azound the spill. <br />Minor spills inside the building can be treated with kiln dust after containment with sorbent <br />booms or sand-bag dikes. <br />Nearest Clean-up Equipment: A spill kit for acids is located in the MFWWTP building. A <br />water supply and gazden hose are also located in the MFWWTP building. Additional spill kits <br />aze located in the Moly Warehouse and the Open Pit Truck Shop, if needed. <br />Visual Inspections and Integrity Testing: A Climax employee accompanies all acid deliveries; <br />therefore, unloading is continuously monitored. The tank is observed at least daily, otherwise. <br />Conam Inspection Inc. performed an integrity test and an in-service inspection of the sulfuric <br />• acid tank on Apri16, 2000. Results of that inspection are provided in Appendix 5. <br />51 <br />