| Contents Notes |
Introduction -- Process description -- Emission sources and related control equipment -- Emissions data -- NEIC information request letter to Magma -- Magma response to NEIC information request -- SIP regulation applicable to Magma -- Example calculations of gas flow rates, moisture content, actual emission and allowable emission -- Bibliography The Magma Copper Company, a subsidiary of Newmont Mining Corporation, operates an underground mine, concentrator, smelter, electrolytic refinery, and continuous casting rod plant in the vicinity of San Manuel, Arizona. Products include electrolytically refined copper, copper rod, sulfuric acid, and molybdenum. Average anode copper production averages 613 to 635 m. tones (675 to 700 tons)/day. On December 17, 1975, the general manager of Magma was requested by letter to provide process and air pollution control information on the San Manuel Smelter and informed of a planned plant inspection [Appendix A]. On January 30, 1976, the following EPA personnel conducted a process inspection: Mr. Larry Bowerman, USEPA, Region IX; Mr. Reid Iversen, USEPA, OAQPS; Mr. Gary D. Young, USEPA, NEIC; Mr. Jim V. Rouse, USEPA, NEIC. The data requested were furnished at the completion of the inspection [Appendix B]. The purpose of the inspection was to acquire data with which to evaluate the design and operation of existing particulate matter air pollution control equipment. The inspection focused primarily on the smelter, although the concentrator was inspected. Also examined were the process equipment, the particulate matter emission sources, and the air pollution control equipment. The applicable regulation contained in the Arizona State Implementation Plan (SIP) of specific interest for this inspection was the process weight regulation [Appendix C]. This regulation was promulgated as 40 CFR 52.126 on May 14, 1973, to replace the State's process weight regulation, which was determined by EPA to be not sufficiently stringent. The regulation provides for an allowable emission rate for each process unit based on the production feed rate to the unit. |
