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9.0 SOURCES AND CURRENT WASTE MANAGEMENT APPROACHES <br /> EP DUST <br /> Electrostatic Precipitator (EP) dust is generated by the EP System. The EP dust <br /> consists of furnace particulate and absorbent (trona) used for control of sulfur <br /> oxides (SOx). EP dust is recycled into the batch materials. Excess EP dust is <br /> disposed as hazardous waste due to the presence of chromium, selenium, and <br /> lead. <br /> Used Oil and Oily Water <br /> Oil and water are generated from a number of sources. Most of the oil is from oil <br /> skimmers associated with the plant's water recycling system. Skimmers remove <br /> machine and lubricating oils from the recirculating water before it returns to the <br /> process or stored in temporary fixed axel storage tanks (Sumps). Waste oil also <br /> results from the maintenance of process and mobile equipment. Waste oil and <br /> water are transported off-site for either recycling, treatment and/or disposal. <br /> Oily Solids <br /> Oily solids include miscellaneous oil contaminated materials such as mold <br /> swabs, oily rags, and absorbent materials used for spill recovery. Swabs are <br /> generated at the forming machines where they are used to apply lubricant on to <br /> the molds. Oily rags are generated primarily in the forming department and <br /> maintenance shop. These oily solids are shipped to a recycling firm, which <br /> extracts the oil for reuse. Treated absorbent materials are recycled for reuse. <br /> Treated swab heads and other unusable treated debris are discarded as non- <br /> hazardous waste by the recycling firm. <br /> Sodium Hydroxide: <br /> Sodium hydroxide is used to clean machine parts. The waste generated during <br /> this process includes sodium hydroxide and oil. This material is transported off- <br /> site for recovery/reclamation and/or disposal. <br /> This is not a major waste stream generated for 2018. <br /> Aqueous Parts Washer Solution <br /> Aqueous parts wash solution has replaced petroleum naptha, chlorinated <br /> solvents and alkaline cleaners previously used for parts washing. It is not <br /> hazardous in its pure state but may become hazardous in use due to the <br /> accumulation of contaminants. Rather than test each individual washer solution, <br /> all aqueous wash solution is presumed to be hazardous. <br /> This is not a major waste stream generated for 2018. <br />