South Dakota Administrative Rules
Title 74 - Department of Environment And Natural Resources
Article 74:36 - Air pollution control program
Chapter 74:36:07 - New source performance standards
Section 74:36:07:143 - Cap, remove, or decommission collection and control system for existing municipal solid waste landfills

(1) The flow rate of landfill gas shall 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, 2018);

(2) The nonmethane organic compound concentration shall be determined by collecting and analyzing landfill gas sampled from the common header pipe before the gas moving or condensate removal equipment using the procedures in 40 C.F.R. Part 60, Appendix A, Method 25 or 25C (July 1, 2018). The sample location on the common header pipe shall be before any condensate removal or other gas refining units. The owner or operator shall 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

(3) 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 60 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 shall submit the results according to § 74:36:07:138.