T And S Refinery is a superfund site located at Hwy 90 East, Mermentau, LA 70556. The Environmental Protection Agency (EPA) identifies sites such as T And S Refinery 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. T And S Refinery 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.