Methane Testing
Long Beach, CA
Following up on our recent post discussing Long Beach’s methane mitigation requirements and the growing focus on safe redevelopment ahead of the 2028 Olympics, McAlister GeoScience recently completed methane soil vapor testing for a redevelopment project in Long Beach. The testing was performed in accordance with City of Long Beach requirements to evaluate potential subsurface methane conditions prior to redevelopment activities.
Our team installed soil vapor probes and collected methane samples in accordance with the City’s current guidance for methane investigations. Samples were analyzed by a certified laboratory using ASTM analytical methods for fixed gases. In addition to methane sampling, pressure differentials within the probes were evaluated to assess potential vapor migration conditions beneath the site.
Laboratory results indicated methane was not detected in the collected samples, and measured pressure readings did not indicate vapor migration concerns. Based on the findings, no additional methane mitigation measures were required under the City’s standards.
Projects like this highlight the importance of early environmental coordination during redevelopment planning. While methane testing is often a relatively straightforward process, understanding local agency requirements, testing protocols, and redevelopment timelines can make a significant difference in keeping projects moving efficiently.
McAlister GeoScience has extensive experience supporting methane investigations, environmental due diligence, and redevelopment projects throughout Long Beach and Southern California. As development activity continues to expand throughout the region, our team remains focused on helping property owners, developers, and project teams navigate environmental requirements with practical, responsive support.
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