(May 28, 2021, 10:20 AM EDT) -- HELENA, Mont. — A federal judge in Montana on May 26 ordered Atlantic Richfield Co. to contribute $15.3 million toward the $61.3 million ASARCO LLC has incurred in remediating the East Helena Superfund site and pay $1 million for failing to cooperate with the U.S. Environmental Protection Agency and found that it is responsible for 25% of future cleanup costs incurred in cleaning up the site....