Which emission sources are to be inventoried in a 112(j) or 112(g) determination?
A 112(j) submittal should identify all boilers and process heaters at the facility that would have been subject to the vacated standard. This means that you must determine if your facility is a major HAP source AND whether there are affected emission sources onsite. A boiler is an enclosed device using controlled flame combustion and having the primary purpose of recovering thermal energy in the form of steam or hot water. Waste heat boilers are excluded. A process heater is an enclosed device using controlled flame, that is not a boiler, and the unit’s primary purpose is to transfer heat indirectly to a process material (liquid, gas, or solid) or to a heat transfer material for use in a process unit, instead of generating steam. Process heaters are devices in which the combustion gases do not directly come into contact with process material. Process heaters do not include units used for comfort or space heat, food preparation, or autoclaves. Additionally, the vacated standard did not
