Miami | PM-10 Nonattainment Area
Counties Affected:
Parts of Pinal and Gila Counties | View on a Map >
Nonattainment Area Designation Date:
Oct. 31, 1990
(55 FR 45799)
Classification Level:
Moderate
Pollutant of Concern:
PM10 (particulate matter 10 microns or less in diameter; 1987 standards)
Summary:
The concentration of PM10 in the air in Miami has been below federal standards for several years. ADEQ is developing a redesignation request so that EPA will reclassify the area as an attainment area. As part of this request, ADEQ must include an updated emissions inventory, modeling demonstration and a strategy for Exceptional Events. Freeport-McMoran made numerous improvements to the Miami smelter as part of a $250 million expansion project that will further reduce PM10 concentrations. Some of the controls implemented at the copper smelter include:
- Baghouses for materials storage bins
- Baghouse for anode furnace
- Wet electrostatic precipitator for furnace
- Ventilation system over furnace
- Water suppression for material piles and unpaved roads
- Paved road cleaning
Sources of Pollutant:
- Manufacturing of metal
- Open burning and wildfires
- Windblown dust
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