HAMPDEN — Officials say Chevron Corp. will pay a $900,000 fine to settle claims that an estimated 140,000 gallons of oil leaked from a tank farm in Hampden.

It’s the biggest fine imposed by state environmental regulators in 20 years, but Chevron accepts no responsibility for wrongdoing under the agreement.

The state and Chevron together already have spent millions of dollars to remove contaminated soil from the Penobscot River and to protect the water from additional oil that seeped from the tanks.

Chevron owned the oil tank farm between 1950 and 1986, when it was sold to the parent group of Gulf Oil Corp. The state realized that oil was leaking in the mid-1980s.

The largest environmental settlement in Maine, totaling nearly $1 million, was paid in 1991 by International Paper.

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