The state attorney general's office is suing TravelCenters of America LLC and affiliates, claiming violations related to leaks from underground fuel storage tanks in the San Joaquin Valley.
The lawsuit, filed Thursday in Alameda County Superior Court on behalf of the State Water Resources Control Board, charges six TravelCenters fueling stations in Merced and Kern counties with violations threatening the environment.
Calls to TravelCenters were not returned.
Charges include having inoperable line leak detectors and failing to maintain adequate overfill prevention.
Attorney General Jerry Brown is seeking a permanent injunction, civil penalties and other relief, which could add up to millions of dollars.