WAC 296-99-060. How must filter collectors be installed?

(1) You must ensure that, on a pneumatic dust collection system, each fabric dust filter collector has a monitoring device that will show a pressure drop across the surface of its filter. (2) You must ensure that each filter collector installed after March 30, 1988, is: (a) Located outside the facility; or (b) When located inside the facility, protected by an explosion suppression system; or (c) Isolated by a structure with at least a one hour fire-resistance rating: (i) Next to an exterior wall; (ii) Vented to the outside; and (iii) The vent and ductwork must resist rupture from intense heat.