Central Plateau Cleanup Company (CPCCo)

Hanford Site cleanup began in the late 1980s, after the mission to provide nuclear materials was completed and the last reactor was shut down. Cleanup activities underway include retrieval of liquid radioactive and chemical waste in underground storage tanks and building a treatment plant for these wastes; shipment of plutonium to off-site facilities; D4 of excess facilities, remediation of contaminated waste sites; and treatment of contaminated groundwater. In total, cleanup of the site encompasses approximately 1,000 waste sites, pipelines, and burial grounds, along with 900 excess facilities. In the last 20 years, significant progress has been made in reducing risks to human health and the environment.