PDFWAC 296-806-42524

Use properly designed covers for screw conveyors (augers).

EXEMPTION:
This requirement does not apply to screw conveyors where there are drop or hinged bottom sections that cannot remain airtight.
You must design covers for screw conveyors that are:
(1) Removable in convenient sections.
(2) Held in place with stationary clamps. Locate stationary clamps at intervals that will keep all covers dust tight.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 15-24-102, § 296-806-42524, filed 12/1/15, effective 1/5/16; WSR 04-14-028, § 296-806-42524, filed 6/29/04, effective 1/1/05.]