Landfill Gas (LFG) Monitoring and Pilot Treatability Study, IR Site 7, Marine Corps Base (MCB) Camp Pendleton, CA.
TREVET evaluated LFG migration at a closed, capped landfill. Monitoring wells were installed and sampled for methane, and analytical results were used for a human health risk assessment that evaluated vapor intrusion potential to nearby receptors. Elevated methane concentrations in north side perimeter compliance monitoring wells were also detected, indicating LFG migration under the cap. Low cost sustainable technologies were evaluated and an innovative LFG mitigation system was designed, installed, and operated. The system consisted of multiple LFG extraction wells equipped with solar vent flares specifically designed to extract and combust emitted gas. Concentrations of methane in perimeter LFG wells have been reduced by up to 90%, the LFG gradient is reversing back towards the landfill, and significantly decreased concentrations of dissolved methane have been measured in GW wells adjacent to LFG compliance wells since system installation.
“Trevet has consistently delivered high quality reports… work has been on-time and in-budget while providing a system that is addressing landfill gas better than expected.”