Many landfills are still using hand-held monitoring of methane “hot spots” for compliance purposes while relying on models to estimate LFG emissions. Although technological developments in optical remote sensing and other methods offer significant improvements to measuring actual surface emissions from landfills, no single technology or method has risen to the top of the scientific hierarchy, gained universal acceptance, and achieved regulatory approval. Clearly, the technological advances provide more comprehensive methods for measuring methane concentration, identifying methane hot spots and leaks, and providing better coverage of the entire landfill surface. However, some technology falls short in their ability to provide accurate, consistent, and repeatable methane flux or emissions measurements.
As monitoring technology evolves, so have the various ways SCS takes measurements, from source level, drones, and high-altitude aircraft, to satellites. This paper presented at A&WMA by Patrick Sullivan and Raymond Huff summarises and provides details on the following methods:
• First order decay (FOD) modeling for landfills without active LFG collection systems.
• Non-FOD modeling for landfills without active LFG collection systems.
• FOD modeling with measured LFG collection.
• Non-FOD models with various site-specific data input.
• Measured LFG collection with estimated collection efficiency.
• Surface emission monitoring for compliance purposes.
• Ground-based or low-altitude imaging for concentration or hot spot measurement.
• Satellite and aerial imaging for concentration or hot spot measurement.
• Flux chamber testing.
• Ground-level plume measurement.
• Stationary path measurement.
• Reverse air dispersion modeling.
• Tracer studies.
• Low or high-altitude imaging.
• Hybrid methods.
SCS Engineers will provide landfill and landfill gas engineering and construction management services to the Authority. Consulting services will include technical and financial advisory services related to the operation, expansion, and development of the Authority’s landfills, and work with utilities and regulatory agencies.
SCS Engineers has been awarded a contract to provide professional engineering services to the Solid Waste Authority (Authority) of Palm Beach County, Florida. The Authority selected SCS as its preferred full-service provider based on the firm’s wide range of expertise and local presence. SCS Engineers will provide the Authority with professional engineering and consulting services for landfill, landfill gas (LFG), and other solid waste facility management projects.
SCS will provide the technical, construction quality assurance, regulatory, and financial expertise necessary to provide safe, sustainable solutions. The landfill, solid waste management, and LFG support will vary according to task and can include civil, structural, mechanical, environmental, and electrical engineering. SCS’s general responsibilities will include landfill siting, expansions, closures, end use operations, and other improvements or modifications as needed by the Authority to continually improve its landfill and LFG services keeping its landfills in compliance with Federal and Florida Department of Environmental Protection (FDEP) regulations.
“Landfills are complex ecosystems that require the expertise of many types of technical professionals to ensure that the County’s systems are built to last, continue to meet the needs of the community, and safeguard the community’s general health and welfare,” said Eddy Smith, SCS senior vice president. “The planning, design, construction, and maintenance phases of a landfill require a mix of professional engineers and specialists in geotechnical, geological, hydrogeological, environmental, and civil engineering all working on the same team in collaboration with the Solid Waste Authority of Palm Beach County and the FDEP.”