Unobstructed Opening in Methane Mitigation

Unobstructed Opening Definition in Methane Mitigation

Unobstructed Opening: Per the Los Angeles Department of Building and Safety (LADBS) Methane Code, Ordinance Number 175790, an unobstructed opening is a permanent clearance or gap in the walls, floors, or ceiling of a structure, to allow for direct fresh airflow. In methane mitigation plan applications, this does not include windows, skylights, or doorways. Furthermore, the Methane Code, indicates that some structures in Methane Zones and Methane Buffer Zones with large enough unobstructed openings may be eligible for exceptions to the impervious membrane and methane barrier requirements. Although the exception does not apply in all cases.

Related Posts:

Similar Posts

  • Tsunami

    ByGeo Forward

    Tsunami Tsunami: In the seismology branch of geology, a tsunami is an oceanic wave (gravitational) that is produced by seismic activity on the ocean floor. Common triggers of tsunamis are large-scale short­ duration earthquakes, volcanic eruptions, or other submarine earth movements such as subsidence and slope failure.

  • Dry Density (ρd)

    ByGeo Forward

    Dry Density (ρd) “Dry Density” (ρd) is a value that represents the density of soil when it is completely dry. To illustrate, it equates to (“bulk density” / 1) + “water content.” This is a common geotechnical engineering laboratory procedure. Dry Density Formula Dry Density = [(Bulk Density ÷ 1) + (Water Content)]

  • Metamorphic Rock

    ByGeo Forward

    Metamorphic Rock Definition In the field of geology, the term “Metamorphic Rock” refers to a rock classification that is the result of the alteration of prior existing sedimentary rocks or igneous rocks. The alteration process is “metamorphosis, and can take place by various methods and environments. The metamorphosis process produces specific metamorphic rocks, on the…

  • Hydraulic Conductivity (K)

    ByGeo Forward

    Hydraulic Conductivity (K) “Hydraulic Conductivity” (K), in hydrogeology and hydrology, represents the capacity of a porous medium (such as soil) to transmit water, as per Darcy’s Law. To illustrate, the rate at which fluid can move through a permeable medium (such as soil), depends on the properties of that soil (such as intrinsic permeability) and…

  • Natural Gas

    ByGeo Forward

    Natural Gas Natural Gas: In geology, natural gas means combustible hydrocarbon gas that forms by natural geological or biological processes. To illustrate, natural gas that forms by geological processes is the thermal decomposition of buried organic materials. Whereas natural gas that forms via biological processes entail the microbial decomposition of buried organic material. Natural gas…