Environmental Engineering and Contracting

Arroyo Geoscience Inc., Geotechnical Engineering, Glendale, CA
Arroyo Geoscience Inc., Geotechnical Engineering, Glendale, CA

Office: 818-967-5977
Cell: 818-326-3200

A-HAZ Engineering Contractor Lic. No. 1062092

Expert Level Methane Mitigation and Installation

About Methane Gas

Methane gas naturally occurs in the shallow subsurface under homes in many places in California. 

This gas is highly flammable, and it can seep into living areas and garages through foundation cracks, creating huge problems for the occupants. 

Sealing garages and foundations is the only way to prevent a potentially explosive methane gas buildup, and professional methane barrier installation is the best solution for protecting your assets and your loved ones

Methane mitigation system installation comprehensively seals your home from methane gas incursion. Not only does methane mitigation protect your home, it may also be required by law. Los Angeles requirements for methane testing can put developers in an uncomfortable place if their homes aren’t to code. 

Nearly 25% of new construction in California requires methane inspection, so make sure you know all important details surrounding this regulatory requirement before you proceed with your building plan.

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Phase 1: Methane Site Testing

Depending on where you are planning to build, you may need to hire a methane professional in Los Angeles to review your property. Since 2004, all new construction in the city of Los Angeles must adhere to the local methane code, which commonly treats areas with high gas pressure the same as areas with actual methane contamination.

Detecting the presence of methane gas is not enough—it’s also necessary to use professional tools to make sure there is no gas buildup under the surface of the property. If your area is near an oil field or a tar seep, assume that professional methane site testing is required.

Site testing for methane is the first step in our three step process.  Next we will discuss how our team can design a methane mitigation system.

Phase 2: Methane System Design

Expert methane mitigation system design is required to protect your property once methane gas or high gas pressure buildup has been detected.  A variety of measures may be necessary to protect the property from methane gas and remain in compliance with local building codes.

Advanced knowledge in geoscience is necessary to design a comprehensive methane mitigation system. Cross-sectional diagrams and other building information helps professionals defend your property against methane to keep your investment intact and stay compliant with regulations.

Our team can test and design a properly functioning methane mitigation system for your property.  Next we will discuss the third and final phase of the system, which is the installation process.

Phase 3: Installation Of Methane Mitigation System

You’ll need professional help to submit a methane mitigation plan that the city will approve. Once you’re cleared to proceed, the same company that designed your system should also provide installation services. Mitigating methane gas incursion is often one of the first steps of the building process, so make sure to provide ample time for your geosciences contractor to coordinate with the rest of your construction contractors.

Both a Los Angeles city inspector and the deputy methane inspector will need to be present to observe the mitigation process. Beginning with sub slab ventilation, your geoengineering contractor will install the methane barrier and then connect the sub slab ventilation to risers. This completes the mitigation process, and you’ll then acquire the city approval you need to begin building.

Detecting the presence of methane gas is not enough—it’s also necessary to use professional tools to make sure there is no gas buildup under the surface of the property. If your area is near an oil field or a tar seep, assume that professional methane site testing is required.

Recent Projects

Peek inside methane mitigation system projects we've worked on
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