Methane Testing and Soil Gas Survey
Methane testing is performed to screen soil gas underground. This is additionally required to determine whether a mitigation plan is needed to reduce combustion hazards. The process includes drilling, constructing sample probes, sampling and a final report.
CH4 is a colorless and odorless gas, and moves through soil and foundations. Additionally, CH4 accumulates inside buildings overtime. This hazard is usually associated with historical oil and gas fields, and landfills. A methane test is required for all construction projects in a Methane Zone or Buffer Zone.
Furthermore, if test results are high, a mitigation system will be required. Geo Forward, Inc. provides soil testing and mitigation design services.
Methane Testing in Special Zones
Historical oil fields, storage ponds and production wells are the main sources of natural gas hazards in shallow soil. Additionally, landfills and the areas surrounding them are another cause of CH4 in soil gas. Awareness on the hazards of natural gas rises from explosions in central Los Angeles during the 1980s. Since then, the Los Angeles Department of Building and Safety (LADBS) and other local agencies have required testing in special zones.
Los Angeles Methane Buffer Zone
The City of Los Angeles established high-risk boundaries which define a Methane Zone or a Buffer Zone. These zones require soil inspections when undergoing development. Other local agencies apply similar standards. Mitigation requirements can be reviewed in Ordinance No. 175790 and Ordinance No. 180619.
Geo Forward is a licensed soil testing agency and mitigation consultant for the City of Los Angeles Department of Building and Safety, also referred to as the LADBS. Methane test services are provided to meet the requirements of LADBS. LADBS survey includes locating hazards, drilling, setting soil gas probes, sampling, reporting and concluding. Furthermore, the assessments are fast and include an open dialog with clients.
Unincorporated cities under the jurisdiction of the Los Angeles County – CH4 Mitigation Unit (such as Santa Fe Springs and more) require soil gas surveys. Typically, an assessment is needed on construction sites within 1,000 feet of a landfill, or 300 feet of an oil & gas well. Please Click Here to view the County of Los Angeles Building Code.
Huntington Beach and other Cities in Orange County require a CH4 assessment to address explosion hazard risk. Geo Forward offers hydrogen sulfide and CH4 survey services for the City of Huntington Beach. Sampling and testing procedures include all of the elements required by the Huntington Beach Fire Department.
A mitigation plan may be required to eliminate health-related dangers such as asphyxiation or explosion. Moreover, mitigation plans are designed based on the “LADBS Site Design Level,” which is determined from the soil gas test. There are five LADBS Site Design Levels, (Site Design Level I though V). And mitigation design requirements increase with each Site Design Level. Click here to learn more about Mitigation Design Options.
For more information call us at (888) 930-6604 to speak with a licensed professional geologist, engineer or environmental scientist.
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