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Underground Munitions

The Spring Valley neighborhood that is out of almost everyone's price range has a dirty little secret. During WWI that was where the military developed highly toxic chemical weapons and then buried them underground once they were no longer needed. Recent research and discoveries have given the Army Corps of Engineers a bigger clue about where a major cache of the weapons might have been buried and now, after much discussion, the plan is to raze the suspected house, remove all the contaminated soil, and make the lot buildable again. All told the cost for cleaning up Spring Valley has come to $230M. [NYT]