ADVERTISEMENT ADVERTISEMENT Asarco Says Superfund Site Needs Rival's Help Now, Not Later Law360 (February 5, 2021, 10:50 PM EST) -- Asarco told a Montana federal court in its closing argument on Friday that Atlantic Richfield must immediately contribute toward a budgeted $25 million cleanup of a refining complex, saying that the court shouldn't be waiting for "trumpets to sound" to announce final costs. Some $66 million has already been spent on the cleanup of the East Helena, Montana, Superfund site, which had housed Asarco's lead smelter and Atlantic Richfield's zinc fuming operation. Atlantic Richfield — formerly known as Anaconda Copper Mining Co. — already owes 25% of past bills under a 2018 decision.