S.D. Admin. R. 74:36:07:111

Current through Register Vol. 50, page 162, June 24, 2024

Section 74:36:07:111 - Existing municipal solid waste landfill operational standards for collection and control systems

The owner or operator of an existing municipal solid waste landfill with a gas collection and control system used to comply with §§ 74:36:07:106, 74:36:07:107, and 74:36:07:109 shall meet the following operational standards:

(1) Operate the collection system such that gas is collected from each area, cell, or group of cells in the existing municipal solid waste landfill in which solid waste has been in place for:

(a) Five years or more if active; or

(b) Two years or more if closed or at final grade;

(2) Operate the collection system with negative pressure at each wellhead except under the following conditions:

(a) During a fire or increased well temperature, the owner or operator shall record instances when positive pressure occurs in efforts to avoid a fire. These records shall be submitted with the annual report;

(b) If using a geomembrane or synthetic cover, the owner or operator shall develop acceptable pressure limits in the design plan; and

(c) A decommissioned well may experience a static positive pressure after shut down to accommodate for declining flows. All design changes shall be approved by the Secretary;

(3) Operate each interior wellhead in the collection system with a landfill gas temperature less than 55 degrees Celsius (131 degrees Fahrenheit). The owner or operator may establish a higher operating temperature value at a particular well. A higher operating value demonstration shall be submitted to the Secretary for approval and shall include supporting data demonstrating the elevated parameter neither causes fires nor significantly inhibits anaerobic decomposition by killing methanogens. The demonstration shall satisfy both criteria in order to be approved;

(4) Operate the collection system so that the methane concentration is less than 500 parts per million above background at the surface of the landfill. To determine if this level is exceeded, the owner or operator shall conduct surface testing using an organic vapor analyzer, flame ionization detector, or other portable monitor meeting the specifications provided in § 74:36:07:115. The owner or operator shall conduct surface testing around the perimeter of the collection area and along a pattern that traverses the landfill at no more than 30-meter intervals and where visual observations indicate elevated concentrations of landfill gas and all cover penetrations. Thus, the owner or operator shall monitor any openings that are within an area of the landfill where waste has been placed and a gas collection system is required. The owner or operator may establish an alternative traversing pattern that ensures equivalent coverage. A surface monitoring design plan shall be developed that includes a topographical map with the monitoring route and the rationale for any site-specific deviations from the 30-meter intervals. Areas with steep slopes or other dangerous areas may be excluded from the surface testing;

(5) Operate the system such that all collected gases are vented to a control system designed and operated in compliance with § 74:36:07:109. In the event the collection or control system is not operating, the gas mover system shall be shut down and all valves in the collection and control system contributing to venting of the gas to the atmosphere shall be closed within one hour of the collection or control system not operating;

(6) Operate the control system at all times when the collected gas is routed to the system; and

(7) If monitoring demonstrates the operational requirements in subdivision (2), (3), or (4) of this section are not met, corrective action shall be taken as specified in subdivision 74:36:07:112(3) and (4) or § 74:36:07:114. If corrective actions are taken as specified in §§ 74:36:07:112 to 74:36:07:116, inclusive, the monitored exceedance is not a violation of the operational requirements in this section.

S.D. Admin. R. 74:36:07:111

46 SDR 064, effective 11/25/2019

General Authority: SDCL 34A-1-6.

Law Implemented: SDCL 34A-1-18.