WACs > Title 296 > Chapter 296-835 > Section 296-835-11015
Agency filings affecting this section
Take additional precautions if you recirculate ventilation system exhaust air into the workplace.
IMPORTANT: This section applies if exhaust air from dipping or coating operations that use flammable liquids, or liquids with flashpoints greater than 199.4Â°F (93Â°C) is recirculated back into the work environment. You must: â¢ Only recirculate air that contains no substance at a concentration that could pose a health or safety hazard to employees. â¢ Make sure any exhaust system that recirculates air into the workplace: â Passes the air through a device that removes contaminants â Sounds an alarm and automatically shuts down the dip tank operation, if the vapor concentration of any substance in the exhaust air exceeds twenty-five percent of its LFL â Monitors the concentration of vapor from flammable liquids or liquids with flashpoints greater than 199.4Â°F (93Â°C) with approved equipment.
â¢ The LFL concentration in the air must be determined after the air passes through the air-cleaning device and before the air reenters the workspace.
â¢ Most substances will pose a health hazard at a concentration far below twenty-five percent of its LFL.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060 and 29 C.F.R. 1910 Subpart Z. WSR 14-07-086, Â§ 296-835-11015, filed 3/18/14, effective 5/1/14. Statutory Authority: RCW 49.17.010, [49.17].040, and [49.17].050. WSR 02-15-102, Â§ 296-835-11015, filed 7/17/02, effective 10/1/02.]