Utah Admin. Code R307-306-4 - Visible Emission Standard
(1) Except
as provided in (2) below, visible emissions from abrasive blasting operations
shall not exceed 20% opacity except for an aggregate period of three minutes in
any one hour.
(2) If the abrasive
blasting operation complies with the performance standards in
R307-306-6,
visible emissions from the operation shall not exceed 40% opacity, except for
an aggregate period of 3 minutes in any one hour.
Notes
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