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PDFWAC 296-155-765

Rock crushing, gravel washing, and hot mix plants.

(1) Stationary dragline machines must have all moving parts which are exposed to contact guarded with standard safeguards.
(a) You must inspect all running lines, straps, etc., and they must be changed when 10% of the wires in a 3 foot length are broken.
(b) Spars must be properly guyed with a minimum of 5 top guys and where spar is over 50 feet in height, you must use 3 buckle guys.
(c) You must rig a pass line on the spar to provide safe means of reaching top of spar.
(d) The head block must be equipped with a safety strap attached to shell of the block and onto a guy wire leading away from the working area.
(2) Truck dump bunkers must have wheel bumper block installed when dumping material from trucks.
(3) You must install substantial walkways and working platforms, equipped with toe boards and handrails at all plants. You must place standard stairways and ladders to reach all parts requiring oiling and maintenance.
(4) Plant structures must be constructed to carry the required load, without material or structural failure, for the prescribed life of the material used.
(5) Bunker unloading devices must be arranged to be operative from outside the walls of bunkers.
(6) Crusher operators and other employees working where hazardous dust or nuisance dust exists must use approved respirators and goggles.
(7) All dusty rock crushing houses or other dusty places of employment, must be equipped with means for controlling the dust.
(8) Cone type crushers must be equipped with approved guards over or around the feed end to prevent rock from flying from crusher while in operation.
(9) All aggregate elevators, bucket or other type, must have guards or barricades installed under or around return strand and of sufficient strength to sustain weight of piled up broken elevator equipment.
(10) All plant controls must be placed so as to be readily accessible.
(11) Overhead conveyors must be constructed so as to restrain the spillage of material. Wherever the hazard of falling materials exists, you must provide overhead protection over walkways and roadways.
(12) Electrical equipment must be installed and maintained to comply with the National Electrical Code.
(13) You must discharge exhaust fumes from internal combustion engines away from or above the working station.
(14) Hot mix plants, steam boilers and pressure vessels must conform to A.S.M.E. Boiler and Pressure Vessel Codes and applicable rules and regulations of the department.
(15) All hot pipes exposed to contact must be covered or otherwise guarded against contact.
(16) All oil tanks above ground must be properly bedded and grounded.
(17) You must clean up or cover oil leakage on the ground with absorbent material.
(18) Mixer operators must use approved respirator and goggles except when operating from a remote location.
(19) You must provide dust and fume collection systems on all installations. You must discharge dust and fumes back into plant or carried to a suitable distance from the work area and precipitated.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 16-09-085, § 296-155-765, filed 4/19/16, effective 5/20/16. Statutory Authority: RCW 49.17.040 and 49.17.050. WSR 86-03-074 (Order 86-14), § 296-155-765, filed 1/21/86; Order 74-26, § 296-155-765, filed 5/7/74, effective 6/6/74.]
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