El Portal Rr Flat is a superfund site located at Hwy 140, El Portal, CA 95318. The Environmental Protection Agency (EPA) identifies sites such as El Portal Rr Flat 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. El Portal Rr Flat 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.