Methane Testing

LADBS-Compliant Testing
California-Licensed Professionals
Residential & Small-Site Focused

Hands-On Environmental Expertise

Overview

Methane Testing Matters

Methane conditions vary widely from site to site based on geology, historic land use, and subsurface conditions. Desktop reviews and assumptions are not enough for permitting or construction approval.Our on-site methane testing evaluates actual soil gas conditions below grade, in accordance with LADBS and local jurisdiction requirements. We install and monitor site-specific probes, document methane concentrations, and provide clear results used to classify the site’s methane hazard level.

The outcome is reliable data that supports building permits, mitigation design, and construction safety—without delays or surprises during plan review.

Certified Inspections.

Fully Insured.

State Board Licensed.

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Our Process — From Site to Solution

A transparent, step-by-step approach so you always know what’s happening and why.

Consultation & Site Review
We discuss your project scope, requirements, and timeline.

Field Investigation
We collect soil gas samples and perform on-site testing.

Onsite Analysis
‍Samples are analyzed onsite.

Reporting & Recommendations
You receive a detailed report with actionable insights.

Other Geotechnical Services We Provide

We offer a full suite of geotechnical services, including comprehensive geotechnical investigations, solar foundation design, and environmental engineering. As a trusted geotechnical engineering consultant, we provide expert solutions for a wide range of projects.

On-Site Consultations & Environmental Inspections

Field-based evaluations of soil, rock, slope, and environmental conditions to guide safe and sustainable project design. Services include on-site cons

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Engineering Geology

Studying soil, rock, and groundwater conditions to guide safe, efficient, and sustainable project design.

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Methane Soil Gas Survey

Methane level detection in soil to identify leaks or contamination.

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Have questions? We have answers.

Frequently Asked Questions About On Methane Testing

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When is methane testing required by LADBS?

LADBS requires methane testing when a project is located within a mapped Methane Hazard Zone or when site conditions indicate potential methane presence due to historic oil and gas activity, former landfills, or organic-rich soils. Testing is typically required for new construction, additions, ADUs, and projects involving below-grade structures.

What methane levels trigger mitigation requirements?

Methane concentrations measured during testing are evaluated against LADBS criteria to determine the appropriate Methane Mitigation Design Level. Higher methane concentrations typically require more robust mitigation measures, such as venting systems or methane barriers.

Can a soils report be conducted at the same time as methane testing?

Yes. In many cases, conducting a geotechnical (soils) investigation at the same time as methane testing is encouraged. Coordinating both investigations allows field crews to complete subsurface exploration during a single site visit, which can reduce overall mobilization costs and minimize site disturbance.

Who can perform methane testing for LADBS projects?

Methane testing must be conducted by a qualified and experienced professional familiar with LADBS requirements and reporting standards. GeoTed provides methane testing and documentation suitable for LADBS plan review and permitting.

Do you handle both residential and commercial projects?

Yes. We work with homeowners, contractors, developers, and municipalities on projects ranging from single-family homes to commercial sites.

Ready to schedule your project? Let’s take a look at your site.

Whether you need a hillside assessment, drainage review, foundation excavation observation, or an escrow geological inspection, GeoTed provides clear, practical guidance for residential and small-site projects.

Request a Quote Call (818)-639-2396