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WACs > Title 296 > Chapter 296-835 > Section 296-835-11015











296-835-11010    

296-835-11020







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WAC 296-835-11015









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 199.4°F (93°C) is recirculated back into the work environment. You must: • Only recirculate air that contains no substance at a concentration that could pose a health or safety hazard to employees. • Make sure any exhaust system that recirculates air into the workplace: – Passes the air through a device that removes contaminants – 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 – Monitors the concentration of vapor from flammable liquids or liquids with flashpoints greater than 199.4°F (93°C) with approved equipment.

Note:
• 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.

 
• 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, § 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, § 296-835-11015, filed 7/17/02, effective 10/1/02.]