<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.sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0 { 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.sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000001 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002 { color: black; background: white; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003 { 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="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:101"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000">74</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000">:</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000">36</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000">:</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000">07</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000">:</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000000">101</span></a><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000001">.  Tier 2 nonmethane organic compound emission rate for existing municipal solid waste landfills.</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> The owner or operator of an existing municipal solid waste landfill </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> install at least two sample probes per hectare, evenly distributed over the landfill surface that has retained waste for at least two years. If the landfill is larger than </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">twenty-five</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> hectares in area, only </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">fifty</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> samples are required. The probes should be evenly distributed across the sample area. The sample probes should be located to avoid known areas of nondegradable solid waste. The owner or operator </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> collect and analyze one sample of landfill gas from each probe to determine the nonmethane organic compound concentration using 40 C.F.R. Part 60, Appendix A</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">-7</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">, Method 25 or 25C (July 1, 20</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">24</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">). Taking composite samples from different probes into a single cylinder is allowed</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">,</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> provided that equal sample volumes </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">are</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> taken from each probe. For each composite, the sampling rate, collection times, beginning and ending cylinder vacuums, or alternative volume measurements </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> be recorded to verify that composite volumes are equal. Composite sample volumes </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">may</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> not be less than one liter unless evidence </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">is</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> provided to substantiate the accuracy of smaller volumes. Terminate compositing before the cylinder approaches ambient pressure where measurement accuracy diminishes. If more than the required number of samples is taken, all samples </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> be used in the analysis. The landfill owner or operator </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> divide the nonmethane organic compound concentration from Method 25 or 25C by six to convert from nonmethane organic compound concentration as carbon to nonmethane organic compound concentration as hexane. If the landfill has an active or passive gas removal system in place, Method 25 or 25C samples may be collected from these systems instead of surface probes</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">,</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> provided the removal system can be shown to provide sampling as representative as the two sampling probe per hectare requirement. For active collection systems, samples may be collected from the common header pipe. The sample location on the common header pipe </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> be before any gas moving, condensate removal, or treatment system equipment. For active collection systems, a minimum of three samples </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> be collected from the header pipe. The owner or operator </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> determine the site-specific nonmethane organic compound concentration using the following sampling procedure:</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002"> </span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">(1)</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">  </span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">Within </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">sixty</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> days after the date of determining the nonmethane organic compound concentration and corresponding nonmethane organic compound emission rate, the owner or operator </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> submit the results;</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002"> </span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">(2)</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">  </span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">The owner or operator </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> recalculate the nonmethane organic compound mass emission rate using the appropriate equation in §</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:99"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">74:36:07:99</span></a><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> using the average site-specific nonmethane organic compound concentration from the collected samples instead of the default value;</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002"> </span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">(3)</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">  </span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">If the resulting nonmethane organic compound mass emission rate is less than </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">thirty-four</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> megagrams per year, the owner or operator </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> submit an estimate of nonmethane organic compound emissions in the annual nonmethane organic compound emission rate report. The site-specific nonmethane organic compound concentration </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> be retested every five years; and</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002"> </span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">(4)</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">  </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">If the nonmethane organic compound mass emission rate</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">,</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> as calculated using the Tier 2 site-specific nonmethane organic compound concentration</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">,</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> is equal to or greater than </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">thirty-four</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> megagrams per year, the owner or operator </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">must</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">:</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002"> </span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">        </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">(a)</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">  </span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">Submit a gas collection and control system design plan within one year and install and operate a gas collection and control system within </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">thirty</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> months according to §§</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:106"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">74:36:07:106</span></a><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> and </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:109"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">74:36:07:109</span></a><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">;</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">        </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">(b)</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">  </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">Determine a site-specific methane generation rate constant and recalculate the nonmethane organic compound emission rate using the site-specific methane generation rate using the Tier 3 procedures specified in §</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:102"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">74:36:07:102</span></a><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">; or</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">        </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">(c)</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">  </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">Conduct a surface emission monitoring demonstration using the Tier 4 procedures specified in §</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> </span><a href="https://sdlegislature.gov/Rules?Rule=74:36:07:103"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">74:36:07:103</span></a><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">.</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002"> </span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000001">Source:</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> 46 SDR 64, effective November 25, 2019</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">; 52 SDR 27, effective September 17, 2025</span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">.</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000001">General Authority:</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-6"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">34A-1-6</span></a><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">, </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-18"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">34A-1-18</span></a><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">.</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">    </span><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000001">Law Implemented:</span><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34A-1-18"><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0-000003">34A-1-18</span></a><span class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14C0">.</span></p><p dir="ltr" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14P0"><span xml:space="preserve" class="sd4c41be2-dca8-4b31-be97-ffc85eb4da14000002"> </span></p></div></body></html>