For his part, Hoffman says he is not worried about spectators breathing in too much ozone thanks to the expected Hudson breeze. But watchers may want to take note when the unmistakable, deceptively clean-smelling ozone smell wafts over the pier.
*Correction (10/9/12): The three asterisked sentences in this article were edited after posting to correct errors. In the first, the word "unstable" was changed to "reactive." In the subsequent two, references to "parts per million" were changed to "parts per billion."