<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.sfbe31e6e-92c9-4607-920d-437af61451e4P0 { 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.sfbe31e6e-92c9-4607-920d-437af61451e4C0 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sfbe31e6e-92c9-4607-920d-437af61451e4C0-000001 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sfbe31e6e-92c9-4607-920d-437af61451e4000002 { color: black; background: white; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sfbe31e6e-92c9-4607-920d-437af61451e4C0-000003 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } </style></head><body><div><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:143"><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000">74</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000">:</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000">36</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000">:</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000">07</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000">:</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000000">143</span></a><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000001">.  Cap, remove, or decommission collection and control system for existing municipal solid waste landfills.</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> The owner or operator </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">must</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> calculate the nonmethane organic compound emission rate for purposes of determining when the collection and control system can be capped, removed, or decommissioned using the following equation:</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4000002"> </span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">M</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"><sub>NMOC</sub></span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">=1.89×10</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"><sup>-3</sup></span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">Q</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"><sub>LFG</sub></span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">C</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"><sub>NMOC</sub></span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">, where</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4000002"> </span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">M</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"><sub>NMOC</sub></span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> = Mass emission rate of nonmethane organic compounds, in megagrams per year;</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">Q</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"><sub>LFG</sub></span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> = Flow rate of landfill gas, in cubic meters per minute; and</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">C</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"><sub>NMOC</sub></span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> = Nonmethane organic compound concentration, in parts per million by volume as hexane.</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4000002"> </span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">(1)</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">  </span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">The flow rate of landfill gas </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">must</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> be determined by measuring the total landfill gas flow rate at the common header pipe that leads to the control system using a gas flow measuring device calibrated according to the provisions of 40 C.F.R. Part 60, Appendix A, Method 2E, section 10 (July 1, 20</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">24</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">);</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4000002"> </span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">(2)</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">  </span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">The nonmethane organic compound concentration </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">must</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> be determined by collecting and analyzing landfill gas sampled from the common header pipe</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">,</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> before the gas moving or condensate removal equipment</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">,</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> using the procedures in 40 C.F.R. Part 60, Appendix A, Method 25 or 25C (July 1, 20</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">24</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">). The sample location on the common header pipe </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">must</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> be before any condensate removal or other gas refining units. The owner or operator </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">must</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> divide the nonmethane organic compound concentration from Method 25 or Method 25C by six to convert from nonmethane organic compound concentration as carbon to nonmethane organic compound concentration as hexane; and</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4000002"> </span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">(3)</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">  </span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">The owner or operator may use another method to determine landfill gas flow rate and nonmethane organic compound concentration if the method has been approved by the secretary. Within </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">sixty</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> days after the date of calculating the nonmethane organic compound emission rate for purposes of determining when the system can be capped or removed, the owner or operator </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">must</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> submit the results according to §</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:138"><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000003">74:36:07:138</span></a><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">.</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4000002"> </span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000001">Source:</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> 46 SDR 64, effective November 25, 2019</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">; 52 SDR 27, effective September 17, 2025</span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">.</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000001">General Authority:</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-6"><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000003">34A-1-6</span></a><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">, </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-18"><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000003">34A-1-18</span></a><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">.</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">    </span><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000001">Law Implemented:</span><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4C0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-18"><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0-000003">34A-1-18</span></a><span class="sfbe31e6e-92c9-4607-920d-437af61451e4C0">.</span></p><p dir="ltr" class="sfbe31e6e-92c9-4607-920d-437af61451e4P0"><span xml:space="preserve" class="sfbe31e6e-92c9-4607-920d-437af61451e4000002"> </span></p></div></body></html>