In December 2009, EPA announced the largest Superfund settlement in EPA history. Out of a global bankruptcy settlement totaling $1.7 billion for environmental cleanups at contaminated sites across the country, about $494 million will go toward Superfund cleanup in the Bunker Hill Superfund site.ut of a global bankruptcy settlement totaling $1.7 billion for environmental cleanups at contaminated sites across the country, about $494 million will go toward Superfund cleanup in the Bunker Hill Superfund site.