This is an administrative order on consent (AOC) under CERCLA 122(g) resolving the potential CERCLA 107 and RCRA 7003 liability of 25 de minimis generators of hazardous substances for costs incurred or to be incurred at the Casmalia Resources Superfund Site. The AOC resolves these parties' potential liability for the cost of response actions at the Site, estimated at approximately $284 million. The 25 parties collectively sent over 90 million pounds of waste to the Site, representing approximately 1.6% of the total Site waste. The settlement requires the parties to pay EPA $8.1 million in response costs. The settlement also resolves these 25 parties' potential liability to the State of California for response costs at the Site, and to the California Department of Fish and Game, and the U.S. Department of Interior (on behalf of the Fish and Wildlife Service) and National Oceanic and Atmospheric Administration, for potential natural resource damage claims at the Site. Casmalia is a former hazardous waste disposal facility that accepted approximately 5.6 billion pounds of waste from nearly 10,000 generators between 1974 and 1989. EPA has documented the release of hazardous substances into the environment at the Site, and has been responding to conditions since 1992. This settlement is one of a series of cashout settlements with major and de minimis parties intended to provide funding for continuing response actions at the Site.