ARSD 74:36:07:120. Existing municipal solid waste landfill surface methane monitoring

The owner or operator of an existing municipal solid waste landfill that seeks to demonstrate compliance with the 500 parts per million surface methane operational standard shall monitor surface concentrations of methane quarterly according to the procedures provided in § 74:36:07:114 and the instrument specifications in § 74:36:07:115. Any closed landfill that has no monitored exceedances of the operational standard in three consecutive quarterly monitoring periods may skip to annual monitoring. Any methane reading of 500 parts per million or more above background detected during the annual monitoring returns the frequency for that landfill to quarterly monitoring.