Protect employees during welding, burning, or other work using open flames.
The employer must make sure the dip tank and the area around it are thoroughly cleaned of solvents and vapors before performing work involving:
(1) Welding;
(2) Burning;
OR
(3) Open flames.
Reference:
There are additional requirements for this type of work. See Welding, cutting and brazing, WAC 296-307-475, and Respirators, chapter 296-307 WAC, Part Y-5.