Access essential regulatory documents, methane mitigation standards, and vapor intrusion guidelines for Los Angeles, LA County EPD, Long Beach, Huntington Beach, Department of Toxic Substances Control California Environmental Protection Agency.
Los Angeles Department of Building and Safety Regulations
PDF • 2.4 MB
Official LADBS methane mitigation code requirements for methane zone building permits in Los Angeles.
Download PDFPDF • 3.1 MB
Standards and procedures for conducting methane soil gas investigations and testing protocols.
Download PDFPDF • 1.8 MB
Streamlined methane mitigation requirements and simplified methods for single-family residential properties.
Download PDFPDF • 4.2 MB
Pre-approved standard plan details for methane mitigation systems and subslab depressurization designs.
Download PDFPDF • 8.7 MB
Official Los Angeles methane zone map with detailed Zone 1, 2, and 3 classifications and buffer zone boundaries.
Download PDFPDF • 2.8 MB
Registered Deputy Inspector's Certificate of Compliance.
Download PDFDepartment of Toxic Substances Control California Environmental Protection Agency
PDF • 1.5 MB
Health and safety guidelines regarding vapor intrusion risks, exposure pathways, and protective measures for occupants.
Download PDFPDF • 2.2 MB
California Department of Toxic Substances Control (DTSC) issuance of the Vapor Intrusion Mitigation Advisory (VIMA or Advisory) for use on sites that may be impacted
Download PDFHuntington Beach Fire Department Specifications
PDF • 1.2 MB
Huntington Beach Fire Department guidelines for Methane Mitigation City Spec 429.
Download PDFLong Beach Development Services
PDF • 2.1 MB
Long Beach City Information Bulletin 055 - Methane zone building permit requirements and mitigation standards for Long Beach developments.
Download PDFLos Angeles County Public Works Environmental Protection Division. Use LA County "Do I need Methane Mitigation" Website https://dpw.lacounty.gov/epd/swims/onlineservices/search-methane-hazards-esri.aspx
PDF • 1.9 MB
Gas Hazard Mitigation Policy and Standards Implementation Policy and Standards for Sections 110.3, 110.4, and 110.5 of TITLE 26 of the Los Angeles County Code
Download PDFPDF • 1.9 MB
Appendix A - Covenant and Agreement for a Passive System | Appendix B - Covenant and Agreement for an Active System | Appendix C - Methane Gas Control System Plan General Notes | Appendix D - Construction Notes for Membrane Installation | Appendix E - Monitoring Probe Requirements | Appendix F - Ventilation System Requirements for a Passive Gas Control System
Download PDFOur certified engineers can help navigate any of the code requirements and guidelines, and ensure your project meets all regulatory standards across all jurisdictions.