NESHAP for Major Sources: Industrial, Commercial, and Institutional Boilers and Process Heaters (Subpart DDDDD) ("Boiler MACT") - Boilers at large ("major") sources of HAP. NESHAP for Area Sources: Industrial, Commercial, and Institutional Boilers (Subpart JJJJJJ) ("Boiler Area Source Rule") - Boilers at small ("area") sources of HAP. Section 129 NSPS and Emission Guidelines for Commercial and Industrial Solid Waste Incinerators (CISWI) - Boilers that burn solid waste. NHSM rule that defines "solid waste" - To determine whether a source must meet boiler standards or CISWI.
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