Tesoro Corp. has agreed to pay $1.1 million to settle claims it failed to test or monitor the production of gasoline for harmful pollutants at oil refineries in Washington state, Utah, Alaska and North Dakota.
The U.S. Environmental Protection Agency says Tesoro violated requirements of the Clean Air Act at the refineries.
Tesoro, which has a refinery in Anacortes, says it’s resolving the problem and takes its environmental obligations seriously. EPA requires refineries to ensure that gasoline complies with fuel quality and performance standards.
The San Antonio, Texas-based company is being required to submit a plan to ensure it properly tests batches of gasoline at all seven of its western U.S. refineries.