Regulations last checked for updates: Apr 24, 2025

Title 40 - Protection of Environment last revised: Nov 24, 2025
All TitlesTitle 40Chapter IPart 60Subpart OOOOcAppendix - Table 3 to Subpart OOOOc of Part 60—Alternative Technology Periodic Screening Frequency at Well Sites and Centralized Production Facilities Subject to AVO Inspections and/or Semiannual OGI or EPA Method 21 Monitoring
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Appendix - Table 3 to Subpart OOOOc of Part 60—Alternative Technology Periodic Screening Frequency at Well Sites and Centralized Production Facilities Subject to AVO Inspections and/or Semiannual OGI or EPA Method 21 Monitoring
Minimum screening frequency Minimum detection threshold
of screening technology *
(kg/hr)
Semiannual≤1
Triannual≤2
Triannual + Annual OGI≤10
Quarterly≤5
Quarterly + Annual OGI≤15
Bimonthly≤15

* Based on a probability of detection of 90%.

authority: 42 U.S.C. 7401
source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.
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