NR 438.01(2)(2) Purpose. The purpose of this chapter is to establish, pursuant to ss. 285.11, 285.13, 285.17, and 299.15 (1) and (2), Stats., requirements for submission of emissions inventories for owners or operators of air contaminant sources.

NR 438.02NR 438.02 Definitions. The definitions contained in ch. NR 400 apply to the terms used in this chapter. In addition, the following definitions apply to the terms used in this chapter:

NR 438.02(1a)(1a) “Condensable PM” means a material that is vapor phase at stack conditions but that condenses or reacts upon cooling and dilution in the ambient air to form solid or liquid PM immediately after discharge from the stack.

NR 438.02 NoteNote: Condensable PM, if present from a source, is typically in the PM2.5 size fraction and, therefore, all of it is a component of both primary PM2.5 and primary PM10.

NR 438.02(1e)(1e) “Facility” means all stationary sources emitting air contaminants which belong to the same industrial grouping, are located on one or more contiguous or adjacent properties, and are under the control of the same person, or persons under common control. Emissions resulting from loading, unloading or stockpiling materials to or from vessels or vehicles while at a facility shall be considered as part of the facility’s emissions. Air contaminant sources, other than transportation related activities, shall be considered as part of the same industrial grouping if they are classified under the same 2-digit major group as described in the Standard Industrial Classification Manual, 1987, incorporated by reference in s. NR 484.05 (1).

NR 438.02(1g)(1g) “Filterable PM” means particles that have an aerodynamic diameter equal to or less than 100 micrometers that are directly emitted by a source as a solid or liquid at stack or release conditions and captured on the filter of a stack test train.

NR 438.02(1i)(1i) “Filterable PM2.5” means particles that have an aerodynamic diameter equal to or less than 2.5 micrometers that are directly emitted by a source as a solid or liquid at stack or release conditions and captured on the filter of a stack test train.

NR 438.02(1k)(1k) “Filterable PM10” means particles that have an aerodynamic diameter equal to or less than 10 micrometers that are directly emitted by a source as a solid or liquid at stack or release conditions and captured on the filter of a stack test train.

NR 438.02(1m)(1m) “Primary PM” means the sum of filterable PM and condensable PM.

NR 438.02(1o)(1o) “Primary PM2.5” means the sum of filterable PM2.5 and condensable PM.

NR 438.02(1q)(1q) “Primary PM10” means the sum of filterable PM10 and condensable PM.

NR 438.02(1s)(1s) “Process” means an activity occurring at a unit device that generates emissions, controls emissions, or discharges emissions.

NR 438.02(1u)(1u) “Process type code” means a brief descriptor of the process type.

NR 438.02(2)(2) “Source classification code” means a process-level code that describes the equipment or operation that is emitting a pollutant.

NR 438.02 NoteNote: Source classification codes are available as set forth by EPA’s Emissions Inventory System, which is an information system for storing all current and historical emissions inventory data.

NR 438.02(3)(3) “Unit device” means the physical equipment or equipment line where a process occurs.

NR 438.02(4)(4) “Unit device type code” means a brief descriptor of the unit device type.

NR 438.02 HistoryHistory: Cr. Register, May, 1993, No. 449, eff. 6-1-93; am. (1), (2), Register, February, 1995, No. 470, eff. 3-1-95; am. (2), Register, October, 1999, No. 526, eff. 11-1-99; CR 21-072: renum. (1) to (1e), cr. (1a), (1g), (1i), (1k), (1m), (1o), (1q), (1s), (1u), r. and recr. (2), cr. (3), (4) Register July 2022 No. 799, eff. 8-1-22.

NR 438.03(1)(1) Reportable air contaminants and levels.

NR 438.03(1)(a)(a) Except as provided under par. (am), any person owning or operating a facility that emits an air contaminant in quantities above applicable reporting levels, except indirect sources of air pollution, shall annually submit to the department an emissions inventory of annual, actual emissions or, for primary particulate matter, primary PM10, primary PM2.5, sulfur dioxide, nitrogen oxides, carbon monoxide and volatile organic compounds, throughput information sufficient for the department to calculate its annual, actual emissions. The reportable air contaminants and applicable reporting levels are listed in Table 1 in this chapter.