Los Angeles Methane Zones Map

Los Angeles Methane Zones Map

The Los Angeles Methane Zone Map is a publication by the City of Los Angeles Department of Building and Safety (LADBS). This map identifies various areas of hazardous subsurface methane gas, within LA city limits. In fact, these hazardous gas zones are usually a result of naturally surfacing tar and crude oil, or shallow soil contamination by old oil drilling wells. Additionally, landfill sites are known to produce methane soil gas. As a result, the Los Angeles Methane Zone Map categorizes two types of zones; methane buffer zones and methane zones. And each zone is based on proximity to a methane soil gas source. Consequently, according to the City of Los Angeles, most development projects within these zones require a methane mitigation system. Thus, methane soil gas testing is common in these zones. Updated April 14, 2020.

Los Angeles Methane Zones Map

Los Angeles Methane Zones Map

Geo Forward is the leading provider of methane soil gas testing and mitigation design services. Moreover, Geo Forward is an Authorized and Certified Methane Testing Agency for the City of Los Angeles Department of Building and Safety (LADBS). For professional assistance locating a property on the Los Angeles Methane Zone Map, call (888) 930-6604 to speak with a professional geologist today. 

What the Methane Zones Map Means

Project sites in methane zones and methane buffer zones generally require methane testing and methane mitigation systems. As per the Los Angeles Building Code, the LADBS will typically refer to this map to identify the requirement of a mitigation system. As a result, the Los Angeles Building Department requires the highest level (Level 5) of methane mitigation at the forefront of project planning. However, developers do have the option to perform a methane test before opting for Level 5 mitigation. The motive of a methane test is to achieve site-specific methane test data. As a result of the data, geologists can officially determine a site-specific “mitigation design level,” which may be less than “Level 5.” This determination can maximize savings for any construction project, and eliminate unnecessary aspects of the default “Level 5” mitigation system.

Requirements for a Methane Barrier

In most cases, the methane mitigation process comprises a methane barrier as the key component. Sometimes, a barrier isn’t necessary, depending on results and the building type. This final determination basis itself on the local building codes, as well as the mitigation plan design. Lastly, costs, methods, materials, and functionality of the actual vapor barrier are a result of the methane mitigation construction professionals.

LA Methane Zone Testing Example

For instance, if a developer plans to construct a new structure on a property within a “Methane Zone,” the Building Department will require that he or she submit a “Level 5 Methane Mitigation Plan” by default, and build accordingly. This could be expensive. However, the Subject Site itself may not contain such high methane gas concentrations. Consequently, the developer opts to conduct an LADBS-approved methane test, with data indicative of a “Level 2” site. And as a result, the developer saves thousands of dollars in construction costs, between the now-approved “Level 2” system, and the previously required “Level 5” system.

LA Methane Buffer Zone Testing Example

In the same initial scenario above, the results can be more favorable within a “Methane Buffer Zone.” In fact, the difference between the default requirement of a “Level 5” system and the LADBS-approved “Level 2” test result, may even eliminate the requirement for methane mitigation system overall (for certain buildings). As a result, a greater amount of time and money can be saved for certain projects.

Los Angeles Methane Zones Map - Locate a property on this map to determine if methane zone testing or methane buffer zone mitigation is needed.

Source: City of Los Angeles Methane Zones Map – Showing Methane Zone and Methane Buffer Zone Properties.

Map Sources:

Los Angeles Department of Public Works, Bureau of Engineering
Los Angeles Department of Building and Safety (LADBS)

Methane Zone Map Los Angeles, CA

The map displayed above is the official Los Angeles Methane Zone Map, per Ordinance 175790. In fact, this map displays methane zone and methane buffer zone boundaries, which are established by the nearest locations of historical crude oil and natural gas hot spots. Alternatively, methane zones can be a result of nearby landfills. Consequently, projects in the pink or purple highlighted areas may require Methane Testing and Methane Mitigation.

Professional assistance is available for locating properties on this methane zone map. Call (888) 930-6604 to coordinate a free consultation.

Forward-Thinking Geologists, Engineers, and Contractors!

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