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Compliance date for adding covered processes

What happens if I bring a new covered process on line (e.g., install a second storage tank) after submitting my original RMP?

For a new covered process added after the initial compliance date, you must be in compliance on the date you first have a regulated substance above the threshold quantity.  There is no grace period.  You must develop and implement all the applicable rule elements and update your RMP before your process contains more than a threshold quantity of a regulated substance.