GROTON, Conn. (AP) -- Submarine maker Electric Boat has been cited by the state Department of Environmental protection for three environmental violations in the past six months.
The Day of New London reports the most serious involves the release of 4 million gallons of polluted water from EB's graving dock into the Thames River in January.
The DEP says Electric Boat violated water discharge permits, state regulations and the federal Clean Water Act.
In a statement, Electric Boat says the violations were self-reported and steps were immediately taken to prevent them from being repeated.
DEP spokesman Dennis Schain says the company and the state are negotiating a resolution that could include a fine or other enforcement action.
The citations are the first at EB since 2007.
