Understanding the variability in pricing is key for stakeholders in the construction and development sectors. Costs are subject to change based on the individual requirements of each site, which might be due to environmental conditions or the scope of the planned project. An accurate estimate takes into consideration both the complexities of the site and the comprehensive nature of the work needed.

Key Takeaways

• Methane Soil Test pricing varies due to unique property and project factors.
• Methane Soil Test are influenced by the specific requirements of the construction site.
• Accurate pricing assessments are tailored to the property’s conditions and the development scope.

Tailored Work Plan Parameters

When considering the financial implications of methane soil assessments, one must recognize that costs fluctuate based on the intricacies of the specific location. Engaging with experts is advised to arrive at an accurate estimate tailored to the project’s characteristics. The complexity of these tests, involving intricate processes such as boring into the ground, collecting and analyzing samples, reporting, and compliance with licensee requirements, warrants a comprehensive budget, particularly for expansive endeavors. Failing to allocate sufficient funds could lead to departmental disapproval, additional costs from modifications, re-evaluation, or legal disputes. Providing well-considered estimates is crucial for the integrity of the Methane Testing Report.

Factors Determining the Cost of Methane Soil Testing

Accredited Laboratories and Expert Personnel

To conduct methane soil tests in line with the Los Angeles Department of Building and Safety standards, laboratories need to possess a valid Laboratory Testing Agency License from the City of Los Angeles. Additionally, these tests necessitate several days of on-site work by drillers and licensed geologists. The mobilization of drilling equipment and the expertise of these professionals represent a significant portion of the costs involved.

Equipment and Sampling Materials Usage

The oversight of drilling and sampling activities requires the presence of certified geologists. Planning, execution, and oversight—ranging from probe installation to soil-gas sample collection—are carried out under the supervision of accredited experts. The city’s regulations demand these specific protocols, further adding to the expenses of methane soil testing.

Collection and Assessment Procedures

The process of gathering and evaluating soil-gas samples is critical for producing accurate data. Geologists adhere to state guidelines during both field sampling and laboratory testing, ensuring the integrity of the data through strict quality control measures. The production of data in a format that allows thorough review by senior professionals is a vital step in maintaining high standards.

Comprehensive Reporting

The final methane test report includes multi-faceted information such as historical land use, geological features, and intended construction details, aligned with building regulations. This report also categorizes the plot in terms of the LADBS Site Design Level, drawing conclusions and making recommendations as per the stipulations provided by Los Angeles Building Codes.

Consequences of Unreasonably Low Report Fees

Concerns with Below-Market Rate Testing

Low-priced offers for soil tests often raise red flags about the adequacy of the procedures used. Clients have reported incidents where cost-cutting measures, such as minimal hand-drilling and not reaching the required depth for samples, have led to unreliable data. This inadequate testing frequently results in the building department’s disapproval, necessitating further expenses for additional tests and corrective measures.

The Impracticability of Guaranteed Low Test Outcomes

Promises of guaranteed minimal methane levels by some testing firms are misleading and unprofessional. Soil conditions, particularly in the Los Angeles region, vary considerably from one location to another, making it impossible to accurately foresee methane concentrations. Even adjacent properties can demonstrate vastly different test results, indicating that each parcel of land must be individually and thoroughly evaluated without presumptions about the outcome.

Cost-Saving Strategies in Methane Testing by Construction Firms

In an effort to win substantial construction contracts, some firms offer low-priced methane testing. They use these low rates as a leverage to obtain more lucrative construction deals. This approach, while seemingly cost-effective for clients, could be seen as a conflict of interest and raises ethical questions. Occasionally, contractors may operate under different business names for methane testing to avoid reputational risk. Organizations like us are committed to guiding clients through the complexities of the construction process, promoting transparency in methane mitigation efforts.

Obtain a Tailored Methane Test Quotation

To determine the cost of methane soil testing, it is advisable to secure an individualized assessment. Factors like site-specific attributes and geological conditions can influence the price. For a personalized quote and expert advice, interested parties can contact a geological specialist at (818) 967-5977.

Common Inquiries

Methane Soil Test Pricing in Los Angeles

The cost of a methane soil test in Los Angeles can vary widely. Factors influencing price include site conditions and the scope of the development project. Costs generally range between $3,000 and $8,000. For a specific quote, consulting a professional service is advisable.

Steps for Conducting Methane Soil Tests in Designated Areas

In areas designated as methane zones, testing follows a defined protocol:

1. Initial Assessment: Determining the necessity for testing based on zoning.
2. Soil Gas Test: Conducting tests at various depths to detect methane levels.
3. Lab Analysis: Samples are analyzed for methane concentration.
4. Report Submission: Findings are compiled and submitted to relevant authorities.

Requirements for LADBS Methane Testing Standards

The LADBS maintains a stringent set of requirements for methane testing which includes:

• A minimum number of samples based on property size.
• Use of approved testing equipment.
• Adherence to specified testing procedures.

Methane Zone Maps Access

To locate methane zone maps from the LADBS, one can visit their official website or directly access the information through the LADBS Methane Mitigation Standards page.

Methane Inspection Process and Certification Requirements

The process for methane inspection is conducted by licensed professionals and includes:

• Site evaluation.
• Testing performed as per LADBS standards.
• Inspectors are mandated to possess a Methane Testing Field License.

LADWP’s Role in Methane Regulation

The Los Angeles Department of Water and Power (LADWP) is involved primarily in the provision of utilities. Regulation of methane and safety within construction sites falls within the jurisdiction of the LADBS.

Innovative Projects Reducing Greenhouse Gas Emissions

One of the primary goals of environmental engineering is to reduce the emission of greenhouse gases, which are major contributors to global warming and climate change. Projects focusing on renewable energy sources, energy efficiency, and waste reduction are at the forefront of this effort.

Renewable Energy Integration

Environmental engineers play a crucial role in designing and implementing renewable energy projects, such as solar power plants, wind farms, and hydroelectric facilities. By shifting the energy production from fossil fuels to renewable sources, these projects significantly reduce carbon dioxide (CO2) and other greenhouse gas emissions. For instance, the development of large-scale solar farms in arid and semi-arid regions harnesses solar energy, providing clean power to thousands of homes and businesses while reducing reliance on coal and natural gas.

Enhancing Energy Efficiency

Improving energy efficiency in industrial processes, buildings, and transportation systems is another area where environmental engineering shines. By optimizing energy use, engineers can substantially lower CO2 emissions. An example is the retrofitting of older buildings with energy-efficient systems, such as LED lighting, smart thermostats, and better insulation. These upgrades not only reduce energy consumption but also lower greenhouse gas emissions associated with electricity generation.

Waste Management Solutions

Environmental engineers also develop innovative waste management strategies that contribute to reducing methane emissions, a potent greenhouse gas. Through the implementation of advanced composting techniques and the conversion of organic waste into bioenergy, these projects minimize the amount of waste sent to landfills, where it would decompose and release methane. Additionally, wastewater treatment plants are being designed to capture methane for energy production, turning a potent greenhouse gas into a valuable resource.

Carbon Sequestration Efforts

Beyond reducing emissions, environmental engineering plays a vital role in carbon sequestration, which involves capturing and storing atmospheric CO2. Projects in this domain range from natural solutions, such as reforestation and wetland restoration, to technological approaches like carbon capture and storage (CCS).

Reforestation and Wetland Restoration

Environmental engineers collaborate with ecologists and other experts to design and implement large-scale reforestation and wetland restoration projects. These ecosystems act as natural carbon sinks, absorbing CO2 from the atmosphere. By calculating the optimal types and distributions of plants, engineers can maximize the carbon sequestration potential of these areas, contributing significantly to climate change mitigation.

Carbon Capture and Storage Technology

CCS technology, developed and refined by environmental engineers, captures CO2 emissions from industrial processes and power generation before they reach the atmosphere. The captured CO2 is then transported and stored underground in geological formations or used in industrial applications. While still an emerging technology, CCS has the potential to capture substantial amounts of CO2, offering a critical tool in efforts to reduce global greenhouse gas emissions.

Contact an Environmental Engineer

The role of environmental engineering in mitigating climate change is both vast and varied, encompassing a wide range of projects and technologies aimed at reducing greenhouse gas emissions and enhancing carbon sequestration. From integrating renewable energy sources and improving energy efficiency to advancing waste management and carbon capture technologies, environmental engineers are at the forefront of developing sustainable solutions to one of the most significant challenges of our time. By continuing to innovate and apply their expertise, environmental engineers play a pivotal role in steering our planet towards a more sustainable and resilient future.

Public Works Los Angeles County

Managing Methane Zones in Land Development

For land developers, the obligation to address soil vapor issues is often unwelcome news, especially when a project falls within a methane zone. Many developers recognize the methane mitigation process as both time-consuming and expensive. Yet, they also acknowledge its critical importance for ensuring the safety of occupants, making it an indisputable necessity. Advancements in technology and increased awareness are leading regulatory bodies to better understand the health and safety implications. Consequently, environmental and health and safety regulations are continually evolving, contributing to a safer and healthier future in America.

Initial Step – Conducting Methane Testing

For developers involved in methane mitigation, the initial step often involves testing for subterranean methane soil gas. This procedure typically includes drilling on the property and setting up soil vapor probes for sample collection. These samples are gathered over a 24 to 48-hour period under the supervision of a professional geologist. In some areas, the outcome of these tests might even negate the need for further methane mitigation. Alternatively, they can help fine-tune the mitigation system design, aiding developers in minimizing costs and effort while complying with local regulations.

Methane Testing Report Review and Approval
The final methane testing reports must be submitted to the relevant local building department or methane mitigation authority. These reports are subject to a thorough examination by agency reviewers and might require adjustments or modifications. Therefore, it’s crucial to engage a methane testing firm with regional expertise to avoid project delays due to report rejections or revisions.

Second Step – Designing a Methane Mitigation Plan

Crafting a methane mitigation plan is the next phase for construction within a methane zone. This specialized design process usually necessitates the involvement and certification of a licensed geologist or engineer. The preparation of this plan requires a complete set of architectural and structural blueprints, along with a geotechnical report and grading plan. The geologist is responsible for developing a comprehensive methane mitigation plan, encompassing all necessary calculations and specifications for construction. For simpler projects, contractors may also refer to standard plans provided by the local building department.

Approval of the Methane Mitigation Plan
Methane mitigation plans also need to be approved before construction can start. Generally, the agency that reviews the methane test reports will examine these plans as well. Often, these two components are reviewed concurrently since mitigation plans are based on the site-specific methane test data.

Third Step – Constructing the Methane Mitigation System

Building an effective methane mitigation system in compliance with building codes and plans can be a complex task. It requires coordination with other site activities and timelines. This type of construction is specialized and mandates certifications from barrier manufacturers and approvals from various regulatory agencies.

Final Step – Inspection by a Qualified Methane System Inspector

In most jurisdictions, a certified “Methane Deputy Inspector” is required to oversee and validate the construction of the methane mitigation system. This inspector is responsible for ensuring that the construction meets the local building department’s standards. The deputy inspector, to avoid conflicts of interest, should not have any connection to the construction contractor. This inspection is a vital part of the methane mitigation process, marking the final checkpoint before project approval.

Methane Mitigation Construction by Arroyo Geo

Arroyo Geo’s approach to testing and mitigation design aligns strictly with LADBS standards, ensuring objectivity and compliance. For detailed information on methane testing, refer to Arroyo Geo’s article “Methane Mitigation Construction: Guidelines and Best Practices.”

A specialized domain, Methane Mitigation Construction mandates a Methane Mitigation Design prepared by a licensed Professional Engineer. This design sets the groundwork for the professionally trained teams at Arroyo Geo, who use non-standard procedures for Mitigation Systems. Notably, these systems often differ across projects and necessitate certification. Arroyo Geo has all requisite certifications and licenses to construct these systems.

Safety and Standards in Methane Ventilation Installation

Proper installation of ventilation systems is vital as incorrect installations can result in dangerous methane concentrations in structures, posing public health risks. Arroyo Geo maintains top-notch standards in installation and inspection, ensuring designs align with the Methane Mitigation Engineer’s specifications.

Foundational Methane Sealing Techniques

Besides ventilation systems, methane barriers play a pivotal role. These barriers, laid beneath building slabs, function as a protective seal against methane breaches. Installing them demands specialized certification due to their complex nature. Within Southern California, only a select group of contractors, including Arroyo Geo, are certified to install these barriers.

Ensuring Safety with Methane Monitoring Systems

For areas with high subsurface methane concentrations, your city’s Department of Building and Safety necessitates methane detectors and alarms within structures. These systems, which must be installed by expert electrical professionals, provide an added layer of protection against Methane Vapor Gas intrusion.

Key Components of an Efficient Methane Mitigation System:

Methane barriers, a primary component in Methane Mitigation Construction, are applied using spray asphalt emulsions. Though their application can be cost-intensive and demands expertise, their benefits are long-lasting if applied correctly.

Importance of Sub-slab Venting in Methane Mitigation

Another vital aspect is the sub-slab vent system, designed to alleviate subfloor depressurization caused by methane gas build-up. Continuous methane monitoring is crucial, and should methane levels rise, alarms and sensors, as per LADBS standards, are triggered. Contractors well-versed in Methane Mitigation are recommended for these installations.

Overlap of Waterproofing and Methane Barrier Construction:

In places like Los Angeles, new constructions often need Methane Mitigation Construction. Arroyo Geo specializes in installing methane barriers on structural walls. Interestingly, these walls often need waterproofing, allowing a dual purpose for methane barriers when correctly specified.

Essentials When Selecting a Methane Mitigation Expert

Stay updated on Methane Mitigation techniques, especially in areas like Los Angeles known for historical oil wells. Misunderstandings about mitigation can lead to oversight and potential hazards. Recalling incidents like the Ross Superstore explosion underlines the importance of proper methane mitigation.

Navigating the Bidding Process for Methane Mitigation Projects

This emerging industry demands thorough scrutiny of work scopes when requesting bids. Contractors should provide bids compliant with Methane Mitigation Design. Lower quality barriers might lead to inspection issues, costing time and money.

Understanding and Utilizing LADBS Guidelines for Methane Systems

LADBS provides standard plans for methane mitigation systems, which can be a cost-effective design approach. However, ambiguity in these plans during construction might result in increased costs.

Navigating Permitting and Inspection for Methane Projects

Engaging a consultant for a project-specific methane mitigation design is advisable. This ensures all stakeholders, including LADBS and contractors, align on project expectations, facilitating smoother and more cost-effective implementations.

To ensure the safety and success of construction projects within methane zones and methane buffer zones in Los Angeles, it is crucial to understand what they are, how to conduct appropriate tests and implement methane mitigation systems, if necessary.

What is a Methane Zone?

In Los Angeles, a methane zone refers to an area designated by the Los Angeles Department of Building and Safety (LADBS) where elevated concentrations of methane gas exist underground.

These concentrations correspond to the city’s current and historical oil wells and oil or natural gas production fields. City authorities may also designate methane zones around landfills or areas featuring naturally occurring methane sources, such as crude oil or tar.

A methane zone surrounds the Los Angeles City Oil Field. The LADBS has also designated methane zones in numerous other Los Angeles County areas and neighborhoods. Examples include Cheviot Hills, Inglewood, Venice Beach, Las Cienegas, Playa Del Rey, Union Station, and Boyle Heights.

What is a Methane Buffer Zone?

A methane buffer zone is a designated area surrounding a known buffer zone, acting as a border separating it from non-methane zones. Methane buffer zones contain lower concentrations of underground methane gas.

Methane buffer zones also help ensure the safety and protection of neighboring non-methane areas. They act as a protective barrier to prevent methane gas migration from the methane zones into surrounding regions.

Most methane zones are surrounded by methane buffer zones, except in select areas where construction is impossible, such as oceanfront locations.

Methane Properties and Safety Risks

Methane (CH4) is a colorless, odorless, highly flammable greenhouse gas. It is the main component of natural gas. Methane typically forms from decomposing organic material in natural environments, like swamps, marshes, and artificial areas, like landfills and sewage treatment facilities.

According to the United States Geological Survey (USGS), methane can migrate into water wells and accumulate in confined spaces. While methane gas is not toxic or irritant, its presence in the air displaces oxygen, presenting a risk of asphyxiation by oxygen deficiency.

Other methane risks are related to the gas’s flammability. When exposed to an ignition source, such as a spark or an open flame, even a small concentration (5% or more) creates a severe risk of fire or explosions.

Methane Hazards in Construction

Besides the health hazards and the risk of fire and explosion, construction projects in methane zones present additional risks if not mitigated. Common construction tasks, such as trenching or drilling, can release methane gas from underground pockets and accumulate in enclosed areas.

Proper monitoring and ventilation systems are essential to prevent methane buildup and ensure a safe working environment for construction workers. Additionally, specialized equipment, such as methane gas detectors, designed to handle methane-sensitive environments may be necessary to minimize the risks associated with construction activities in these zones.

How to Mitigate Risk in Methane Zone Construction Projects

Methane mitigation is crucial for the safety of construction workers and future residents of the construction project; it is also required by law in the Los Angeles Municipal Code (LAMC).

According to Ordinance 175,790, the LADBS can withhold construction permits for projects in methane and buffer zones. They may issue construction permits in two cases only:

• Methane mitigation systems suitable for the highest risk level have been installed
• LADBS-approved methane testing protocols have revealed the construction site has a lower risk level than the maximum
• The construction project is for an excepted building under LAMC Sections 91.7104.3.2 and 3.3

Methane Zone Risk Levels Defined

The LAMC defines methane risk levels and appropriate mitigation methods with the Site Design Level designation in Table 71 (Section 91.7109.2). Site Design Levels range from Level I to Level V, with Level V representing the highest methane concentration levels.

• Level I: 0 to 100 parts per million by volume (ppmv) of methane
• Level II: 101 to 1,000 ppmv
• Level III: 1,001 to 5,000 ppmv
• Level IV: 5,001 to 12,500 ppmv
• Level V: Over 12,500 ppmv

For construction projects located in a methane buffer zone, LAMC Section 91.7104.3.6 states that methane mitigation systems are not required if the area is:

• Site Design Level I or II
• Site Design Level III, if fitted with trench dams and seal fittings for cables or conduits.

Site Testing

The higher the Site Design Level, the more stringent the minimum methane mitigation requirements. By default, the LAMC requires construction project developers to submit a methane mitigation plan suitable for a Level V site.

The best and most accurate way of determining proper methane mitigation is to contact a geo-engineering contractor to perform an LADBS-approved methane test. If the methane test results demonstrate a lower risk level than Site Design Level V, the LAMC allows developers to apply the methane mitigation systems appropriate to that level.

Types of Methane Mitigation Systems

Various methane mitigation systems are defined as legal in the Los Angeles Municipal Code (Section 91.7102). Approved methods and construction techniques are divided into passive and active categories.

Passive methane mitigation includes barriers, membranes, and passive methane gas removal systems. They include:

• Sub-slab ventilation systems
• Vapor barriers
• Gas-impervious membranes
• Gravel blankets
• Passive ventilation systems

Active methane mitigation includes all passive systems plus elements designed to detect and extract methane gas from the substrate. These approaches include:

• Methane sensors
• Alarm systems
• Gas extraction systems
• Active ventilation systems

What to Do if Your Construction Project is in a Methane Zone

If your project is in a methane zone, the best solution to maintain safety without going over budget is to contact a professional geo-engineer for a methane test.

While the law allows you to forgo methane testing if you implement methane mitigation suitable for a Level V site, doing so can be unnecessarily costly. A methane test lets you determine the exact methane concentration levels under your construction site.

If the test results demonstrate your Site Design Level is less than V, you can safely and legally implement the mitigation methods appropriate to the detected level. This maintains maximum safety while ensuring compliance with the law.

Methane is a highly flammable gas that can seep into buildings from various sources and cause problems, including property damage and injury to its occupants. Monitoring and measuring the methane concentration is vital to the health and safety of workers and building occupants in high-methane areas.

Methane monitoring is also critical for understanding the sources of methane emissions to reduce their impact on infrastructure and the environment.

There are two main measuring approaches to methane monitoring: bottom-up and top-down. Both are very useful for understanding a location’s general methane emissions situation. Before you build a home or occupy a structure, contact Arroyo Geoscience for a complete methane measurement performed by certified professionals.

How Emissions are Measured: The Bottom-Up and Top-Down Approaches

Research techniques for measuring and monitoring methane emissions differ in scope and use of equipment. The bottom-up method looks at specific sources of methane emissions, such as herds of cattle, landfills, or natural gas operations, to see how much methane gas they emit. From this small-scale perspective, scientists can offer a broader picture of methane gas emissions in the area.

The top-down measuring approach takes top-level atmospheric readings from the entire planet, a continent, a nation, or a region. It then applies a quantitative understanding of the emissions to get a broad picture of the methane released in the area.

This method provides a comprehensive view and must be combined with the bottom-up approach. Methane has a long atmospheric lifetime and spreads around the globe due to stratospheric winds; using both techniques together provides the most accurate measurements.

Bottom-Up Measuring Technique

The bottom-up measuring technique takes qualitative measurements from site-specific locations and multiplies them over time and by emission factors such as the type of source. These sources might include an area like a large landfill or microbiologically driven emissions from cattle herds. As these different sources have a wide variance in temporal and spatial factors, the precise measuring conditions must be tailored to the source of emissions.

Some of the techniques used to gather data in small-scale bottom-up measurements from different types of sites include:

Point Source Measurements

Point source measurements detect and measure emissions from a localized source, such as a leaky valve or a coal mine ventilation system. The gas flow rate is calculated by placing a calibrated bag with a known volume on the source so the amount of gas leaked can be precisely measured.

Chamber Techniques

Chamber techniques involve placing a small box, usually one cubic meter or less, on a source of methane, for example, a section of a manure pile or on an area of soil. This methane monitoring system calculates emissions by measuring the change in methane gas concentration in the box over a precise, short, timed series.

Micrometeorological Techniques

If the source of methane emissions cannot be easily captured in a bag or box, they can be measured using meteorological equipment. The data from fast-response methane sensors and wind speed and direction sensors are calculated using atmospheric transport modeling.

The measurement area, or footprint, must be large enough to account for spatial and temporal variation in the emissions. Scientists can use vertical and horizontal flux measurement techniques to get an accurate reading.

Perimeter Facility Line Measurements

Perimeter facility line measurements are done by equipping the perimeter of a site with tunable diode laser infrared open-path spectrometers to measure the methane concentration per meter of distance upwind and downwind of an area. The measurement is determined by calculating the difference between ventilation rates upwind and downwind of the site.

The techniques used to gather emissions measurements from larger sources like landfills, coal mines, or natural gas systems are customized for each source of emissions.

Enteric Methane

Enteric methane is produced by fermentation caused by microbes in the gastrointestinal tracts of animals. This methane can be released into the atmosphere by expiration, flatulence, or eructation. The gold standard of enteric methane emissions detection methods involves placing a sample animal in a chamber for three days, during which researchers feed the animals and remove their waste. Well-calibrated instruments measure their methane output, which can then be used as an average for all animals at the facility.

Petroleum and Natural Gas Systems

Petroleum and Natural Gas Systems measuring and monitoring cover a system from the wellhead to the fuel’s point of use. This monitoring does not account for the emissions from burning or using the fuel.

As there are numerous potential emissions sources along the supply chain, each source uses a combination of small-scale site-specific monitoring systems and larger-scale, system-wide measurements from airplanes flying over the infrastructure.

Landfills

Unlike other human-made sources of methane, landfill methane detection methods cannot use simple emissions calculations based on data multiplied by emissions factors. Soil factors, oxidation processes in the landfill, seasonal climate variation, and operational practices influence landfill emissions.

Researchers measure emissions using a series of techniques, including chambers placed at meter intervals at different times of the day, meteorological measurements, and mass balance readings from aircraft.

Coal Mines

Coal mines produce methane biogenically due to microbes in the coal seam or thermogenically during the coalification process. In other words, methane is a byproduct of the heat released by microorganisms as coal deposits are formed.

Underground mine emissions can be measured at the site of the ventilation shafts using site-specific techniques like point source measurements. For open-pit coal mines, the emissions can be measured using open-path Fourier-transform infrared spectroscopy, which is then analyzed using Gaussian-based plume dispersion modeling.

Top Down Measuring Technique

For more significant sources of methane, top-down measures taken on a large geographic scale are necessary. The exact techniques used will depend on how large the scale is. These measurements use atmospheric measurements of methane concentrations and quantitative calculations based on known methane sources and sinks.

Global Measurements

Measurements that encompass the entire planet are done using a few different methods. Since 1978, a series of 45 detectors across the West Coast of North and South America and on several Pacific islands have been taking measurements four times per year to gauge methane concentration in the atmosphere.

More recently, the Greenhouse Gases Observing Satellite (GOSAT) uses Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) to give higher resolution measurements planet-wide than specifically located monitoring stations.

Continental Measurement

The NOAA Global Greenhouse Gas Reference Network (GGRN) operates a group of 40 300-meter-tall towers located across North America to detect methane emissions in their local area. These towers combine to give a picture of the emission measurement continent-wide. Samples are also collected at 17 locations every 2 to 3 weeks using aircraft.

Regional Measurement

Different regions have adopted their own methane emissions detection methods to understand methane emissions in their local area. Cities like Boston, Los Angeles, and Indianapolis have all constructed tower sites similar to those used to measure continent-wide emissions in their local areas. These measurements show the ventilation rates for methane emissions and methane concentration at upwind and downwind locations.

These methane measurements have shown a pronounced regional emission variance and help pinpoint problematic sources of excessive emissions.

Arroyo Geoscience for Precision Methane Monitoring

Methane emissions pose significant problems for the planet, local communities, and building infrastructure. Methane is a dangerous gas, and a methane leak can seriously endanger the health and safety of people in an area.

The expert technicians at Arroyo Geoscience can explain how emissions are measured and thoroughly inspect an area to identify dangers for occupants or the planet. Our trained professionals will use up-to-date measuring techniques and monitoring technology and give you the most accurate readings possible for your site.

Contact us today for a detailed study of the methane in your area, and let our experts give you peace of mind.

The Los Angeles Department of Building Safety (LADBS) requires methane testing on structures within certain designated high-risk or elevated risk areas. These at-risk areas, known as methane zones and methane buffer zones, are published on a map produced by the LADBS, but it is also available on city zoning and planning tools like ZIMAS and NavigateLA.

If your property falls within a City of Los Angeles methane zone, you will need to have a methane test before you do any construction, remodeling, or renovation. It is critical you find a qualified environmental engineering and consulting company that can guide you through the test and ensure you comply with city ordinances and regulations. These are some of the questions you should discuss with your engineering company before beginning the methane testing process.

How will the test be conducted?

Any methane soil gas test must be conducted according to the regulations and requirements developed by the City of Los Angeles. The city requires that probes be sent down 5, 10, and 20 feet into the ground beneath your property to measure the levels of methane gas present at those depths. The results are reported back to the city for mitigation and documentation purposes.

To send the probes down to those required depths, boreholes must be carefully drilled to get accurate readings and comply with the regulations laid out by City Ordinance in the ​​LADBS Methane Testing Standards.

Do I need both a shallow and a deep methane test?

Both shallow and deep methane tests will need to be conducted on your property in almost all cases. It is better not to think of them as two separate tests but as two phases of the same test; they’re both conducted to find the area on your property with the highest concentration of methane gas.

Shallow Methane Test

The City of Los Angeles requires that every property have at least two separate shallow methane tests, or for properties larger than 10,000 square feet, one test per 10,000 square feet. These shallow tests are used to find areas of higher methane concentration on your property and to choose a suitable place for the deep methane test.

Deep Methane Test

A deep methane test or Deep Gas Probe will be drilled wherever the highest methane concentration was found during the shallow methane tests. City ordinance requires that every property also have a minimum of two separate deep methane tests but only requires one per 20,000 square feet of property.

Bores are drilled into preselected areas to at least 20 feet below the property’s lowest point or elevation. Methane sensing probes are installed at the 5, 10, and 20-foot mark and left to record data over a 24-hour period.

While this might seem like a lot of testing, it is all required by the LADBS, and failure to follow the rules precisely can result in the test being rejected by the department.

Is there a risk my utilities might be affected or damaged?

Many properties have buried electrical, fiber optic, gas, and water lines. The single largest risk associated with an LADBS methane test comes from hitting, damaging, or rupturing one of these lines. The resulting damage could be as small as a brief interruption of telephone service or as dangerous as a serious water leak or a gas explosion.

DigAlert is a non-governmental organization deputized by California state law to ensure safety when digging into any area where underground utilities might be present. Before any drilling can happen, DigAlert must be notified. They notify all relevant utility companies and providers to come to your property and mark out the location of their pipes and wires.

While this usually is more than sufficient to ensure no damage is done, it is also recommended that any drilling sites be investigated with Ground Penetrating Radar (GPR). This is a form of radar that looks for objects or obstructions underground. If anything is found using GPR, a different, more suitable site for drilling can be selected.

Will there be a lot of drilling? Will you use direct push drilling?

The environmental engineering company will need to drill to conduct both shallow and deep methane tests. The drilling techniques are designed to be minimally invasive and aim to cause as little disruption as possible.

One of the best ways to bore the necessary holes is to use direct push drilling. There are a few different types of push drilling, and many people are curious about what is direct push drilling? And why is it seen as the best solution?

Direct push drilling uses the weight of the drilling machine combined with a powerful hydraulic hammer to drive the drilling bit directly into the ground without the need for large drill bits or cumbersome manual drills.

Direct push drilling is the fastest, safest, and most effective way to drill the methane test boreholes in accordance with LA city regulations. It does what is necessary for the test but minimizes the impact on your property.

What steps will I need to take once I know the results of the methane test?

After the methane probes have taken 24 hours’ worth of information, the data is recorded and assessed by your environmental engineering firm. Your property will be given a Methane Mitigation Hazard Classification based on the readings and results. The classifications run from levels 1 to 5.

Your environmental engineering firm can help you understand the different levels and how they impact your property. Different levels require different modifications to existing buildings and any new buildings on the site.

The methane mitigation construction procedures depend both on the classification level as well as factors such as whether the building is naturally or mechanically ventilated, the intended use of the building, distance to pedestrian footpaths if there is groundwater on the site, if the building has a raised or sunk foundation, and the presence of any flammable materials.

It is possible that methane testing will reveal an issue that could require fairly substantial mitigation work to bring the property into compliance, or it could be much less. Your environmental consulting firm will walk you through what steps you may need to take.

Arroyo Geoscience Your Resource for LADBS Methane Testing

Arroyo Geoscience is a hybrid engineering contracting company that bridges the gap between site geotechnical and environmental testing and the contracting needed to mitigate any issues found on your property. We are a complete solution to all your methane testing and mitigation needs in the Greater Los Angeles Area.

Contact the methane mitigation experts at Arroyo Geoscience today to understand what methane testing you need to comply with your local laws. Call us at 818-967-5977.

Around 12% of methane gas produced each year is due to the decomposition and fermentation of waste in landfills. Landfills in the United States are responsible for a significant portion of this methane gas. Methane gas can seep into the soil and be released into your home unless you are protected by a vapor mitigation system.

Methane in the atmosphere is contributing to climate change. In fact, as a greenhouse gas, methane is 28 times more powerful than carbon dioxide. Fortunately, methane has a much shorter life than carbon dioxide. Reducing landfill methane gas emissions can significantly impact the environment and potentially slow the rate of climate change.

What Causes Methane Gas to Emit From Landfills?

Before we can reduce the amount of methane emitted from landfills, we first need to understand how methane gas is produced.

As part of the decomposition process, organic materials release gases and water as the physical structure breaks down into the basic chemical components. When enough oxygen surrounds the decomposing materials, they release carbon dioxide, nitrogen, and water. This is known as aerobic decomposition. For the first year or so, waste discarded in a landfill has enough oxygen for aerobic decomposition.

As more materials are discarded into the landfill, waste is pushed deeper into the pile, limiting oxygen flow. Without oxygen present, decomposition becomes an anaerobic process. This results in different chemical reactions as the physical materials break down, releasing methane, carbon dioxide, and nitrogen.

The typical landfill will have both anaerobic and aerobic decomposition taking place. This results in gas emissions that are about half carbon dioxide and half methane gas.

How is Methane Gas Extracted from Landfills?

While we can’t alter the decomposition process that leads to methane emissions, it is possible to trap and extract landfill gas emissions for productive purposes. Collection of landfill gas can also reduce odors and other hazards near the landfill.

Landfill methane capture uses a series of wells, blowers, and flares to direct emitted gas to a facility where it can be treated and processed for use. These are installed on closed landfills that have been covered and no longer are actively receiving waste. This allows the system to be installed deep into the mound where anaerobic decomposition is taking place.

Up to 90% of gas can be captured at covered landfills. When a vapor barrier mitigation system is placed over the landfill, this can reduce the amount of gas that escapes into the atmosphere. These same barriers are used to protect homes from harmful gasses seeping in through cracks in the foundation.

How is Captured Methane Gas Used?

Methane gas is the primary component of natural gas used in many homes for heating and cooking. Captured methane can be treated and processed as energy, fuel sources, and various industrial applications.

• Energy – Most landfill methane capture projects in the United States produce electricity from the captured gases. There are many methods to convert methane into electricity. All methods require the combustion of methane gas. When methane is burned, it produces carbon dioxide and water as a byproduct.
• Vehicle Fuel – Captured methane gas can be used by natural gas vehicles. An additional processing step is needed to purify the gas, after which it can be used locally or piped to another location. Natural gas vehicles burn cleaner and produce fewer greenhouse gases and toxic compounds than traditional gas or diesel vehicles.
• Industrial Applications – The applications for captured landfill gas are considerable. Factories and industrial plants can use methane gas to produce electricity on-site, heat boilers, or other gas-fuel-fired equipment. This can reduce the industrial sector’s reliance on fossil fuels.

Protection from Methane Emission

Landfills aren’t the only location where anaerobic decomposition takes place. Within cities, around demolished buildings, and under home foundations, methane gas is being produced through decomposition every day. While the concentration might be less than at a landfill, that doesn’t mean the methane emissions are safe.

New home builders and homeowners should consider having their soil tested for the presence of methane gas. If gas is present, you’ll need an experienced methane mitigation company to help you create a plan.

Arroyo Geoscience, Inc. is an environmental design-build company located in Los Angeles. Our highly trained team can answer any questions you have about methane mitigation while completing the necessary steps to test your home for the presence of this potentially harmful gas. If gas is found in your soil, our team can get to work right away designing and installing the best methane mitigation solution for your needs.

When you work with Arroyo Geoscience, you get professionally trained geological engineers and licensed engineering contractors dedicated to providing you with the solution you need to stay safe, healthy, and happy in your home. Call us today at (818) 967-5977 to get your personalized quote.

Site remediation can take many forms, and consist of simple “brute-force” techniques such as removal and hauling off of contaminated soils and replace with imported clean soils, which is most effective on sites where the extent of the contamination is shallow beneath the surface. Where contamination is deeper, more advanced remediation techniques such as soil vapor extraction and air sparging are used. 

Remediation contracting is typically handled by contractors with engineering and environmental science backgrounds, general engineering contractor licenses and hazardous waste certifications. At Arroyo Geo, our staff has dozens of years of experience in engineering and environmental contracting. Call or email us to discuss your project needs.