PDFWAC 296-307-45540
Control ignition sources.
(1) The employer must make sure the vapor areas and adjacent areas do not have any:
(a) Open flames;
(b) Spark producing devices;
(c) Heated surfaces hot enough to ignite vapors.
(2) The employer must use explosion-proof wiring and equipment in the vapor area.
Reference: | Electrical wiring and equipment has to meet the requirements of the applicable hazardous (classified) location. See Hazardous (classified) locations, WAC 296-307-37209. |
(3) The employer must prohibit smoking in any vapor area: Post an easily seen "NO SMOKING" sign near each dip tank.