Phoenix Methane Mitigation Systems for Redevelopment & Construction
Building on land that used to be a landfill, an industrial site, or open agricultural ground? Methane gas can build up underground long after a site looks ready to develop, and it doesn’t always show up until soil testing or excavation is already underway. When it does, it can stall permits, trigger costly redesigns, or hold up your project at the worst possible time.
ACT designs and installs methane mitigation systems built for Phoenix sites, from soil gas testing through barrier installation and long-term monitoring. One team, one point of contact, from start to finish.
How Methane Impacts the Community
Methane is a colorless, odorless, and highly flammable gas commonly found in landfills, former industrial sites, and areas with organic-rich soils. While not toxic like some chemical vapors, methane poses serious explosion and asphyxiation risks when it accumulates in confined spaces.
In urban infill projects or developments on reclaimed land, methane migration through soil can endanger both construction crews and future occupants. Without proper mitigation, it can also trigger permit denials, failed inspections, or even emergency shutdowns.
When to Test for Methane
Testing and mitigation should be considered in these situations:
- Pre-Construction Due Diligence: Particularly on or near former landfills, swamps, or oil fields.
- As Part of a Phase II ESA: When previous site use or soil gas data indicates elevated methane.
- During Site Grading and Excavation: Disturbing subsoil layers can release trapped methane.
- Where Local Regulations Require It: Many municipalities (especially in California and the Southwest U.S.) mandate methane mitigation plans before development proceeds.
Early testing helps avoid costly redesigns and delays later in the project.
How ACT Handles Methane Mitigation
We start with soil gas testing to find out what’s actually under your site and how much methane is present. From there, our team designs a system built for your project, whether that’s a passive barrier, an active venting system, or both, depending on what the site needs.
Once the design is set, our crews install the system as part of your build, working alongside your construction schedule instead of against it. After installation, we verify the system is working and set up monitoring so you have ongoing visibility, not just a one-time fix.
Why Phoenix Developers Work With ACT
ACT has been designing and installing methane mitigation systems for over 25 years, with more than 2,100 projects completed and over 70 million square feet protected across the country. We’re part of the FullTerra network, giving us access to resources and expertise that go beyond what a single regional contractor can offer.
We design, build, and monitor under one roof. That means no handoffs between separate vendors, no finger-pointing if something needs adjusting, and one team accountable for getting your site safe and compliant.
Once the design is set, our crews install the system as part of your build, working alongside your construction schedule instead of against it. After installation, we verify the system is working and set up monitoring so you have ongoing visibility, not just a one-time fix.
Part of the
FullTerra Family
Together with our sister companies, we provide comprehensive design-build-monitor solutions that protect properties and people across all 50 states.
Our California roots have grown into nationwide reach
As the environmental industry has grown, so have we. We’ve successfully designed and installed soil, groundwater, and vapor mitigation systems in 25 states, including California, Utah, Colorado, Arizona, New Mexico, and Nevada.
- Design / Installation
Designed and installed systems across the nation
- Offices
Corporate HQ in Irvine, CA with an office in San Ramon, CA
Complex sites require sophisticated solutions.
Join developers and property owners nationwide who trust us with their most challenging environmental projects.
Complex sites require sophisticated solutions.
Join developers and property owners nationwide who trust us with their most challenging environmental projects.