1. (a) For purposes of this subpart, the following definitions apply.

2. (b) When a term is not defined in this subpart, it shall have the meaning given in Subpart 1 of this part or in the federal Clean Air Act:

   1. (1) “Actuals PAL for a major stationary source” means a PAL based on the baseline actual emissions (as defined in Subpart 1 of this part) of all emissions units (as defined in Subpart 1 of this part) at the source, that emit or have the potential to emit the PAL pollutant;

   2. (2)

      1. (A) “Allowable emissions” means "allowable emissions" as defined in Subpart 1 of this part, except as this definition is modified according to subdivisions (b)(2)(B) and (C) of this section.
      2. (B) The allowable emissions for any emissions unit shall be calculated considering any emission limitations that are enforceable as a practical matter on the emissions unit's potential to emit.
      3. (C) An emissions unit's potential to emit shall be determined using the definition in Subpart 1 of this part, except that the words "or enforceable as a practical matter" should be added after "federally enforceable";

   3. (3) “Major emissions unit” means any emissions unit that emits or has the potential to emit:

      1. (A) One hundred (100) tons per year or more of the PAL pollutant in an attainment area; or
      2. (B)

3. (i) The PAL pollutant in an amount that is equal to or greater than the major source threshold for the PAL pollutant as defined by the Clean Air Act for nonattainment areas.

   1. (ii) For example, in accordance with the definition of major stationary source in Section 182(c) of the Clean Air Act, an emissions unit would be a major emissions unit for VOC if the emissions unit is located in a serious ozone nonattainment area and it emits or has the potential to emit fifty (50) or more tons of VOC per year;

   2. (4)

      1. (A) “PAL effective date” means the date of issuance of the PAL permit.
      2. (B) However, the PAL effective date for an increased PAL is the date any emissions unit which is part of the PAL major modification becomes operational and begins to emit the PAL pollutant;
   3. (5) “PAL effective period” means the period beginning with the PAL effective date and ending ten (10) years later;
   4. (6) “PAL major modification” means, notwithstanding the definitions for major modification and net emissions increase contained in Subpart 1 of this part, any physical change in or change in the method of operation of the PAL source that causes it to emit the PAL pollutant at a level equal to or greater than the PAL;
   5. (7) “PAL permit” means the major NSR permit, the minor NSR permit, or the state operating permit under a program that is approved into the plan, or the Title V permit issued by the reviewing authority that establishes a PAL for a major stationary source;
   6. (8) “PAL pollutant” means the pollutant for which a PAL is established at a major stationary source;
   7. (9) “Plantwide applicability limitation (PAL)” means an emission limitation expressed in tons per year for a pollutant at a major stationary source that is enforceable as a practical matter and established source-wide in accordance with this subpart;
   8. (10) “Significant emissions unit” means an emissions unit that emits or has the potential to emit a PAL pollutant in an amount that is equal to or greater than the significant level (as defined in Subpart 1 of this part or in the Clean Air Act, whichever is lower) for that PAL pollutant, but less than the amount that would qualify the unit as a major emissions unit as defined in subdivision (b)(3) of this section; and
   9. (11) “Small emissions unit” means an emissions unit that emits or has the potential to emit the PAL pollutant in an amount less than the significant level for that PAL pollutant, as defined in Subpart 1 of this part or in the Clean Air Act, whichever is lower.

Codification Notes: The Clean Air Act, Pub. L. No. 101-549, is codified at 42 U.S.C. § 7401 et seq. "NSR" means new source review.