S.D. Admin. R. 74:36:21:02

Current through Register Vol. 51, page 67, December 16, 2024

Section 74:36:21:02 - Definitions

Unless otherwise specified, the terms used in this chapter mean:

(1) "Adverse impact on visibility," visibility impairment that interferes with the management, protection, preservation, or enjoyment of the visitor's visual experience of the mandatory Class I federal area. Adverse impact on visibility shall be based on a case-by-case basis taking into account the geographic extent, intensity, duration, frequency, and time of visibility impairment, and how these factors correlate with times of visitor use of a mandatory Class I federal area and the frequency and timing of natural conditions that reduce visibility;

(2) "BART," best available retrofit technology;

(3) "Best available retrofit technology" an emission limitation based on the degree of reduction achievable through the application of the best system of continuous emission reduction for each pollutant that is emitted by an existing stationary facility. The emission limitation must be established, on a case-by-case basis, taking into consideration the technology available, the costs of compliance, the energy and nonair quality environmental impacts of compliance, any pollution control equipment in use or in existence at the source, the remaining useful life of the source, and the degree of improvement in visibility that may reasonable be anticipated to result from the use of such technology;

(4) "BART-eligible source," an existing stationary facility;

(5) "Coal-fired power plant," any person, corporation, limited liability company, association, company, partnership, political subdivision, municipality, rural electric cooperative, consumers power district, or any group or combination acting as a unit, owning or holding under lease, or otherwise real property used, or intended for use, for the conversion of coal into electric power;

(6) "Contribute to adverse impact on visibility," a change in visibility impairment in a mandatory Class I federal area of five-tenths deciviews or more, based on a 24-hour average, above the average natural visibility baseline. A source exceeds the threshold if the 98^th percentile (eighth highest value) of the modeling results, based on one year of the three years of meteorological data modeled, equals or exceeds five-tenths deciviews;

(7) "Major source," as defined in § 74:36:01:08(2) and (3);

(8) "Mandatory Class I federal area," any area identified in 40 C.F.R. § 81, Subpart D (July 1, 2018);

(9) "Visibility impairment," any human perceptible change in visibility such as light extinction, visual range, contrast, coloration, from that which would have existed under natural conditions;

(10) "30-day rolling average," expressed as pounds per million Btus and pounds per hour and calculated in accordance with the following procedures:

(a) Sum the total pounds of pollutant in question emitted from a unit during an operating day and the previous 29 operating days;

(b) Sum the total heat input to the unit in million Btus during the operating day and the previous 29 operating days;

(c) Sum the total hours the unit operated in hours during the day and the previous 29 operating days;

(d) For pounds per million Btus, divide the total number of pounds of the pollutant emitted during the 30-day operating days by the total heat input during the 30-day operating days;

(e) For pounds per hour, divide the total number of pounds of the pollutant emitted during the 30-day operating days by the total hours operated during the 30-day operating days.

A new 30-day rolling average shall be calculated for each new operating day. Each 30-day rolling average shall represent all emissions, including emissions that occur during periods of startup, shut down, and malfunction; and

(11) "Operating day," a 24-hour period between 12 midnight and the following midnight during which any fuel is combusted at any time in the unit. It is not necessary for fuel to be combusted the entire 24-hour period.

S.D. Admin. R. 74:36:21:02

37 SDR 111, effective 12/7/2010; 38 SDR 39, effective 9/19/2011; 39 SDR 219, effective 6/25/2013; 42 SDR 52, effective 10/13/2015; 44 SDR 43, effective 9/13/2017; 46 SDR 064, effective 11/25/2019

General Authority: SDCL 34A-1-6.

Law Implemented: SDCL 34A-1-6.