Methane testing and review is an analytical process in which the propensity for naturally occurring methane gas release is determined. Many parts of Yorba Linda are located above naturally occurring pockets of methane gas. If the methane gas seeps up to the surface and disperses naturally into the atmosphere, there is generally little risk of danger. But, if a building is constructed in an area that experiences methane gas seepage, the gas can accumulate in portions of the building and reach dangerous concentrations. In extreme cases, methane gas can accumulate enough to create an explosion hazard. Methane gas is often associated with oil wells, and information can be found at the Division of Oil, Gas & Geothermal Resources website. Additionally, methane gas mitigation is regulated with the assistance of the Orange County Fire Authority (OCFA), which can be reached at 714-573-6108.