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| 27 Source Categories |
| Coal cleaning plants (with thermal dryers); |
Kraft pulp mills; |
| Portland cement plants; |
Primary zinc smelters; |
| Iron and steel mills; |
Primary copper smelters; |
| Primary aluminum ore reduction plants; |
Hydrofluoric, sulfuric, or nitric acid plants; |
| Charcoal production plants; |
Petroleum refineries; |
| Lime plants; |
Primary lead smelters; |
| Coke oven batteries; |
Sulfur recovery plants; |
| Carbon black plants (furnace process); |
Phosphate rock processing plants; |
| Fuel conversion plants; |
Sintering plants; |
| Secondary metal production plants; |
Petroleum storage and transfer units with a total storage capacity >300,000 barrels; |
| Fossil-fuel boilers (or combination thereof) totaling >250 million british thermal units per hour (MMBTU/hour) heat input; |
Chemical process plants except for ethanol production facilities that produce ethanol by natural fermentation included in NAICS codes 325193 or 312140; |
| Taconite ore processing plants; |
Glass fiber processing plants; |
|
Municipal incinerators capable of charging >250 tons of refuse per day; |
Fossil-fuel-fired steam electric plants of >250 MMBTU/hour heat input; or |
| Any other stationary source categories that, as of August 7, 1980, are regulated by a standard promulgated under section 111 or 112 of the Clean Air Act. |
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