Methane Mitigation Design


Based on the results of a methane test, the Los Angeles Department of building and Safety will require a Methane Mitigation Design.  This design must be prepared by a licensed engineer and will consist of a Passive or Active System.

A Passive System is comprised of an Impervious Membrane below the foundation of a building along with a subslab vent system.

An active system is comprised of the passive system components, along with mechanical fans, methane detectors and alarms.

Sway Features