Methane Package ( , 2,256 KB)

Use the links below for all inquiries regarding County of Los Angeles’ policy toward methane gas. The standards apply to all buildings and confined structures located in the County of Los Angeles Unincorporated Communities where County of Los Angeles Department of Public Works is the building official.

Methane Code – Los Angeles County Code-Title 26, Ordinance 110.3 and Ordinance 110.4 (, 12 KB)

Under- Floor Ventilation – California Building Code-Chapter 12, Section 1203.3 (, 21 KB)

County of Los Angeles Department of Public Works Landfill Gas Protection Policy (, 760 KB)

Use the links below for inquiries regarding standard methane mitigation requirements.

Methane Gas Protection System Plan Check List (, 28 KB)

Methane Gas Control System - Passive System (, 126 KB)

Gas Extraction Well (, 132 KB)

Extraction System Burner (, 112 KB)

Air Injection Well (, 134 KB)

Air Injection or Cut Off Trench System (, 75 KB)

Typical Probe Detail (, 72 KB)

Monitoring Well (, 120 KB)

Membrane (, 76 KB)

Prefabricated Pipe Boot (, 86 KB)

Specifications for Liquid Boot (, 76 KB)

Specifications for Vaporlock (, 68 KB)

Appendix A - Covenant and Agreement for a Passive System (, 37 KB)

Appendix B - Covenant and Agreement for an Active System (, 42 KB)

Appendix C - Methane Gas Control System Plan General Notes (, 63 KB)

Appendix D - Construction Notes for Membrane Installation (, 72 KB)

Appendix E - Monitoring Probe Requirements (, 48 KB)

Appendix F - Ventilation System Requirements for a Passive Gas Control System (, 50 KB)

Use the links below to locate major waste systems and oil/gas well locations within County of Los Angeles for the potential of methane gas intrusion into a confined structure. Go to Do I Need Methane Mitigation? to find out if your property is within an area that could potentially produce methane.

Do I Need Methane Mitigation? (website)

Major Waste Systems Map (, 15,020 KB)

Major Waste Systems Index (, 1,962 KB)

Division of Oil, Gas & Geothermal Resources Map (website)

Use the links below to visit websites of other cities and state regulatory agencies.

City of Los Angeles Building & Safety (methane mitigation standards)

City of Santa Fe Springs (methane zone)

California Department of Toxic Substances Control (methane assessment division-3 step process) (primary oversight agency for public schools)  (primary oversight agency for public schools)

List of Methane Gas Management Consultants (, 36 KB)