Vacaville Landfill (Old) - Operational Landfill in Vacaville, California, USA

Vacaville Landfill (Old) is a municipal solid waste landfill located on Brown Valley Road in Vacaville, California, within Solano County. The facility is currently operational and falls under the regulatory oversight of the US EPA's Resource Conservation and Recovery Act (RCRA) Subtitle D, which governs the design, operation, and closure of municipal solid waste landfills. As a landfill in California, it also complies with state-specific regulations enforced by CalRecycle and local air quality management districts. The landfill operates under the NAICS code 562212, which corresponds to solid waste landfill facilities. Landfills of this type typically manage hundreds of thousands of tons of waste annually. The facility's location in a semi-rural area of Solano County suggests it serves both residential and commercial waste streams from Vacaville and surrounding communities. Environmental management at the site likely includes landfill gas collection systems to mitigate methane emissions, leachate collection and treatment to protect groundwater, and regular monitoring of air and water quality. The landfill's proximity to the Sacramento-San Joaquin Delta region underscores the importance of leachate management to prevent contamination of local waterways. Community engagement and traffic management are also key operational considerations for this facility.

The Vacaville area experiences a Mediterranean climate with hot, dry summers and mild, wet winters, which influences landfill operations such as leachate generation and gas production. The facility is situated near the Sacramento-San Joaquin Delta, a critical ecological region, making groundwater protection a priority. Landfill gas management is essential to reduce methane emissions, a potent greenhouse gas, and to comply with the Clean Air Act's landfill gas rules. Community proximity and truck traffic are also important environmental and social factors for this site.