The Colorado petroleum distributors have also agreed to conduct an environmental project designed to offset the harm caused by their failure to meet federal gasoline quality requirements.
EPA said the companies illegally mixed and distributed nearly one million gallons of gasoline that did not meet Clean Air Act emissions and fuel quality requirements.
EPA also said the companies produced millions of gallons of illegal gasoline by mixing natural gasoline, a byproduct of natural gas production, and ethanol with gasoline previously certified to meet Clean Air Act requirements at two terminals in Colorado.
