Question # 258

258. A facility generates metal dust when it processes sheet metal. Each dust particle is actually an alloy containing more than one type of metal (e.g., chromium and aluminum). If the toxic chemical in the metal is listed with a qualifier which includes dust (e.g., aluminum), does EPA consider the dust particle the listed toxic chemical?
In this example, EPA considers metal dust particles, which contain aluminum in the dust form, a listed toxic chemical. Therefore, that weight percentage of the metal dust which is aluminum would be subject to threshold determinations and release and other waste management reporting as aluminum dust.

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