N.M. Code R. § 20.11.60.7 Definitions

• Library: New Mexico Administrative Code
• Edition: 2023
• Currency: Current through Register Vol. 34, No. 24, December 19, 2023
• Citation: N.M. Code R. § 20.11.60.7
• Year: 2023

In addition to the definitions in 20.11.60.7 NMAC, the definitions in 20.11.1 NMAC apply unless there is a conflict between definitions, in which case the definition in 20.11.60.7 NMAC shall govern.

A. "Actual emissions" means the actual rate of emissions of a regulated new source review pollutant from an emissions unit, as determined in accordance with Paragraphs (1)-(3) of Subsection A of 20.11.60.7 NMAC, except that this definition shall not apply for calculating whether a significant emissions increase has occurred, or for establishing a plantwide applicability limit under 20.11.60.27 NMAC. Instead, Subsections E and II of 20.11.60.7 NMAC shall apply for those purposes.

(1) In general, actual emissions as of a particular date shall equal the average rate, in tons per year, at which the unit actually emitted the pollutant during a consecutive 24-month period which precedes the particular date and which is representative of normal source operation. The department shall allow the use of a different time period upon a determination that it is more representative of normal source operation. Actual emissions shall be calculated using the unit's actual operating hours production rates, and types of materials processed, stored, or combusted during the selected time period.

(2) The department may presume that source-specific allowable emissions for the unit are equivalent to the actual emissions of the unit.

(3) For any emissions unit that has not begun normal operations on the particular date, actual emissions shall equal the potential to emit of the unit on that date.

B. "Administrator" means the administrator of the United States environmental protection agency (USEPA) or an authorized representative.

C. "Adverse impact on visibility" means visibility impairment which interferes with the management, protection, preservation, or enjoyment of the visitor's visual experience of the mandatory federal class I area. This determination must be made on a case-by-case basis taking into account the geographic extent, intensity, duration, frequency, and time of the visibility impairments and how these factors correlate with:

(1) times of visitor use of the mandatory federal class I area; and

(2) the frequency and timing of natural conditions that reduce visibility. This term does not include effects on integral vistas as defined in 40 CFR 40Definitions51.301 Definitions.

D. "Allowable emissions" means the emissions rate of a stationary source calculated using the maximum rated capacity of the source, (unless the source is subject to federally enforceable limits which restrict the operating rate, or hours of operation, or both,) and the most stringent of the following:

(1) the applicable standard set forth in 40 CFR Part 60 or 61;

(2) any applicable state implementation plan emissions limitation including those with a future compliance date or

(3) the emissions rate specified as a federally enforceable permit condition, including those with a future compliance date.

E. "Baseline actual emissions" means the rate of emissions, in tons per year, of a regulated new source review pollutant, as determined in accordance with Paragraphs (1)-(4) of Subsection E of 20.11.60.7 NMAC.

(1) For any existing electric utility steam generating unit, baseline actual emissions means the average rate, in tons per year, at which the unit actually emitted the pollutant during any consecutive 24-month period selected by the owner or operator within the five year period immediately preceding when the owner or operator begins actual construction of the project. The department shall allow the use of a different time period upon a determination that it is more representative of normal source operation (a) The average rate shall include fugitive emissions to the extent quantifiable, and emissions associated with startups shutdowns, and malfunctions. (b) The average rate shall be adjusted downward to exclude any noncompliant emissions that occurred while the source was operating above any emission limitation that was legally enforceable during the consecutive 24-month period. (c) For a regulated new source review pollutant, when a project involves multiple emissions units, only one consecutive 24-month period must be used to determine the baseline actual emissions for the emissions units being changed. A different consecutive 24-month period can be used for each regulated new source review pollutant. (d) The average rate shall not be based on any consecutive 24-month period for which there is inadequate information for determining annual emissions, in tons per year, and for adjusting this amount if required by Subparagraph (b) of Paragraph (1) of Subsection E of 20.11.60.7 NMAC.

(2) For an existing emissions unit (other than an electric utility steam generating unit) baseline actual emissions means the average rate, in tons per year, at which the emissions unit actually emitted the pollutant during any consecutive 24-month period selected by the owner or operator within the 10 year period immediately preceding either the date the owner or operator begins actual construction of the project, or the date a complete permit application is received by the department for a permit required either under 20.11.60.7 NMAC or under a plan approved by the administrator, whichever is earlier, except that the 10 year period shall not include any period earlier than November 15, 1990 (a) The average rate shall include fugitive emissions to the extent quantifiable, and emissions associated with startups, shutdowns, and malfunctions. (b) The average rate shall be adjusted downward to exclude any noncompliant emissions that occurred while the source was operating above an emission limitation that was legally enforceable during the consecutive 24-month period. (c) The average rate shall be adjusted downward to exclude any emissions that would have exceeded an emission limitation with which the major stationary source must currently comply, had such major stationary source been required to comply with such limitations during the consecutive 24-month period. However, if an emission limitation is part of a maximum achievable control technology standard that the administrator proposed or promulgated under 40 CFR Part 63, the baseline actual emissions need only be adjusted if the state has taken credit for such emissions reductions in an attainment demonstration or maintenance plan consistent with the requirements of Paragraph (7) of Subsection B of 20.11.60.15 NMAC. (d) For a regulated new source review pollutant, when a project involves multiple emissions units, only one consecutive 24-month period must be used to determine the baseline actual emissions for the emissions units being changed. A different consecutive 24-month period can be used for each regulated new source review pollutant. (e) The average rate shall not be based on any consecutive 24-month period for which there is inadequate information for determining annual emissions, in tons per year, and for adjusting this amount if required by Subparagraphs (b) and (c) of Paragraph (2) of Subsection E of 20.11.60.7 NMAC.

(3) For a new emissions unit, the baseline actual emissions for purposes of determining the emissions increase that will result from the initial construction and operation of such unit shall equal zero; and thereafter, for all other purposes, shall equal the unit's potential to emit.

(4) For a plantwide applicability limit for a major stationary source, the baseline actual emissions shall be calculated for existing electric utility steam generating units in accordance with the procedures contained in Paragraph (1) of Subsection E of 20.11.60.7 NMAC, for other existing emissions units in accordance with the procedures contained in Paragraph (2) of Subsection E of 20.11.60.7 NMAC, and for a new emissions unit in accordance with the procedures contained in Paragraph (3) of Subsection E of 20.11.60.7 NMAC.

F. "Begin actual construction" means in general, initiation of physical on-site construction activities on an emissions unit which are of a permanent nature. Such activities include, but are not limited to, installation of building supports and foundations, laying of underground pipework, and construction of permanent storage structures. With respect to a change in method of operating this term refers to those on-site activities other than preparatory activities which mark the initiation of the change.

G. "Best available control technology (BACT)" means an emissions limitation (including a visible emissions standard) based on the maximum degree of reduction for each regulated new source review pollutant which would be emitted from any proposed major stationary source or major modification which the department, on a case-by-case basis, taking into account energy, environmental, and economic impacts and other costs, determines is achievable for such source or modification through application of production processes or available methods, systems, and techniques, including fuel cleaning, clean fuels, or treatment or innovative fuel combustion techniques for control of such pollutant. In no event shall application of best available control technology result in emissions of any...