Union Oil Co San Francisco Ref is a superfund site located at County Rd, Rodeo, CA 94572. The Environmental Protection Agency (EPA) identifies sites such as Union Oil Co San Francisco Ref because they pose or had once posed a potential risk to human health and/or the environment due to contamination by one or more hazardous wastes. Union Oil Co San Francisco Ref is currently registered as an Archived superfund site by the EPA and does not require any clean up action or further investigation at this time.