Regulations last checked for updates: Feb 21, 2025

Title 40 - Protection of Environment last revised: Nov 21, 2025
All TitlesTitle 40Chapter IPart 98Subpart IIAppendix - Table II-2 to Subpart II of Part 98—Collection Efficiencies of Anaerobic Processes
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Appendix - Table II-2 to Subpart II of Part 98—Collection Efficiencies of Anaerobic Processes
Anaerobic process type Cover type Methane collection efficiency
Covered anaerobic lagoon (biogas capture)Bank to bank, impermeable0.975
Modular, impermeable0.70
Anaerobic sludge digester; anaerobic reactorEnclosed Vessel0.99
authority: 42 U.S.C. 7401-7671q.
source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.
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