<html xmlns="http://www.w3.org/1999/xhtml"><head><meta charset="UTF-8" /><title></title><meta name="Generator" content="PowerTools for Open XML" /><style>span { white-space: pre-wrap; } p.sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0 { margin-top: 0; margin-bottom: 0; margin-left: 0; margin-right: 0; text-indent: 0.00in; text-align: justify; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; line-height: 108%; } span.sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000000 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000001 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000002 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sd16ff1dc-0498-495e-97a9-2dd2e9040fbc000003 { color: black; background: white; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } </style></head><body><div><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:05:04.01"><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000000">74:36:05:04.01</span></a><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000001">.  Insignificant activities.</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> The following emission units are considered insignificant activities and are exempt from inclusion in a Part 70 operating permit unless the source has requested federally</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> </span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">enforceable permit conditions related to the insignificant activity to avoid needing a PSD preconstruction permit or NSR preconstruction permit or the emission unit is applicable to a standard in chapter </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07"><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000002">74:36:07</span></a><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> o</span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">r</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:08"><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000002">74:36:08</span></a><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">:</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbc000003"> </span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (1)  One or more incinerators of less than </span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">one hundred</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> pounds per hour combined burning capacity</span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">,</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> that combust municipal or household waste;</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (2)  A mobile internal combustion engine, including engines in autos, trucks, tractors, airplanes, locomotives, and boats;</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (3)  Laboratory equipment used exclusively for chemical or physical analysis;</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (4)  A unit that has a heat input capability of not more than 3,500,000 Btus per hour, except for units fueled with wood or coal;</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (5)  An air conditioning or ventilating system not designed to remove air pollutants from equipment;</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (6)  Routine housekeeping or plant upkeep activities such as painting buildings, retarring roofs, or paving parking lots;</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (7)  A unit that has the potential to emit two tons or less per year of any criteria pollutant before the application of control equipment. However, the criteria pollutant emissions from the unit must be included in determining whether the source is a major source; and</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    (8)  A unit that has the potential to emit two tons or less per year of any hazardous air pollutant. However, the hazardous air pollutant emissions from the unit must be included in determining whether the source is a major source.</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbc000003"> </span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    However, insignificant activities exempted because of size or production rate must be identified in the Part 70 operating permit application. An application may not omit information needed to determine the applicability of or to impose an applicable requirement.</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbc000003"> </span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    </span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000001">Source:</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> 21 SDR 119, effective January 5, 1995; 25 SDR 123, effective April 4, 1999; 31 SDR 101, effective January 2, 2005; 36 SDR 207, effective June 28, 2010; 42 SDR 52, effective October 13, 2015</span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">; 52 SDR 27, effective September 17, 2025</span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">.</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    </span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000001">General Authority:</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-6"><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000002">34A-1-6</span></a><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">, </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-21"><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000002">34A-1-21</span></a><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">.</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">    </span><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000001">Law Implemented:</span><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-12"><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000002">34A-1-12</span></a><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">, </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-21"><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0-000002">34A-1-21</span></a><span class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcC0">.</span></p><p dir="ltr" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbcP0"><span xml:space="preserve" class="sd16ff1dc-0498-495e-97a9-2dd2e9040fbc000003"> </span></p></div></body></html>