The 2,634-acre Alameda Naval Air Station is a closed Navy installation located on Alameda Island, adjacent to the city of Alameda. Solid wastes generated at the site were disposed of in two on-base landfills. All liquid industrial wastewaters generated at the site prior to 1974 were discharged untreated into Seaplane Lagoon and the Oakland Inner Harbor. The Navy, with EPA oversight, has conducted investigations to support the development of cleanup decisions for the 35 Installation Restoration (IR) sites. Listed as a Superfund site 07/22/99.
Contaminants and Risks
- Surface Water
- Soil and Sludges
- Environmentally Sensitive Area
Remedial Project Manager (RPM)
California Department of Toxic Substances
Potentially Responsible Party – Navy
Wastes generated at the Site included industrial solvents, acids, paint strippers, degreasers, caustic cleaners, pesticides, chromium and cyanide wastes, waste oils containing PCBs, radium associated with dial painting and stripping, medical debris, and inert and unexploded ordnance. Solid wastes generated at the Site were disposed into two on-base landfills. Both landfills are adjacent to the San Francisco Bay and the Site 2 landfill surrounds both fresh and salt-water wetlands which provide nesting and foraging habit for a wide range of migratory and native birds. Alameda Naval Air Station is also a nesting ground for the largest colony of endangered species of Least Tern in Northern California.
All liquid industrial wastewaters generated at the Site prior to 1974 were discharged untreated into Seaplane Lagoon and the Oakland Inner Harbor. These wastes pose a threat to the surrounding San Francisco Bay aquatic life and a potential threat to terrestrial ecological receptors.
Past activities at the base have resulted in a three-acre plume of mostly dense non-aqueous phase liquid (DNAPL) contamination at Site 5, with another larger and deeper DNAPL plume at Site 4. These plumes pose a potential long term human health threat from inhalation of volatile vapors and possible ingestion of groundwater. Remediating these plumes is challenging. The 110-acre Seaplane Lagoon which received all liquid industrial installation wastes from 1936 to 1974 resulted in contaminated sediment requiring remediation.