Skip to content

Protection from Methane Gas Infiltration

Protection from Methane Gas Infiltration

Farallon designed a methane gas mitigation system to protect a large retail warehouse located over layers of methane-generating organic silts deposited on an ancient lake bed in South Ogden, Utah. To protect the new building from methane gas infiltration, Farallon designed an active air-sweep system that was incorporated into the building foundation design.

Contact Information

Get in Touch

This system comprises 3- to 6-inch-diameter perforated PVC collector pipes beneath the building slab, attached to a low-vacuum blower. A second set of perforated pipes placed between the vacuum pipes distribute fresh air beneath the slab. A high-density polyethylene membrane beneath the slab and above the pipes provides further building protection. A geonet composite layer provides a flow path for fresh air to sweep from the distribution pipes to the collector pipes while accumulating methane that may have migrated under the slab. The system operates at a low vacuum that prevents drawing large volumes of methane from a distance. Farallon continues to provide assistance in periodic monitoring of system performance.


Services Utilized

Vapor Intrusion Assessment and Mitigation

Vapor intrusion is rapidly becoming a key issue of concern for owners and prospective buyers of commercial and industrial properties – especially those with historical dry cleaning operations. The effect of changing regulatory...

Read more
Contact Us

Get In Touch

    This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

    This website requires cookies to provide all of its features. For more information on what data is contained in the cookies, please see our Privacy Policy page. By continuing to use this website, you agree to our Privacy Policy.