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Methane Mitigation Standards
County of Los Angeles Methane Gas Mitigation Standards
Gas Hazard Mitigation Policies, Procedures, and Guidelines
(
, 141 KB)
Gas Hazard Mitigation Policy and Standards
(
, 1,090 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 and where Los Angeles County Public Works is the building official.
Under- Floor Ventilation – California Building Code-Chapter 12, Section 1203.3
(
, 21 KB)
Methane Barrier Certification Requirements
(
, 206 KB)
Standard Specifications for Methane Gas Mitigation
Use the links below for inquiries regarding standard methane mitigation requirements.
Methane Gas Plan Submittal Requirements Checklist
(
, 122 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)
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)
Potential Methane Producing Areas in the County of Los Angeles
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)
Download up-to-date GIS file of "Methane Producing Landfills" at
Los Angeles County GIS Data Portal
.
Major Waste Systems Map, dated July 1973
(
, 15,020 KB)
Major Waste Systems Index, dated October 1976
(
, 1,962 KB)
Division of Oil, Gas & Geothermal Resources Map
(website)
Methane Mitigation Requirements Regulated by Other Agencies
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)