Blast cleaning nozzles.
You must make sure nozzles are all of the following:
(1) Mounted on a support when not in use;
(2) Equipped with operating valves that are manually held open.
To help prevent the buildup of static charges, pressurized tanks used to supply abrasive should be:
1. Connected to the manual control of the nozzle; and
2. Have the relief valve or opening located so it can safely vent.
[Statutory Authority: RCW 49.17.010
, and 49.17.060
. WSR 17-18-075, § 296-818-30015, filed 9/5/17, effective 10/6/17; WSR 06-12-074, § 296-818-30015, filed 6/6/06, effective 9/1/06.]