Statutes, codes, and regulations
Washington Administrative Code
Title 296 - Labor and Industries, Department ofChapter 296-307 - Safety standards for agricultureSPECIALIZED OPERATIONSPart U-3 - Other Hazardous MaterialsDipping and Coating Operations (Dip Tanks)
Ventilation
Section 296-307-45015 - Additional precautions if recirculating ventilation system exhaust air into the workplace

Wash. Admin. Code § 296-307-45015

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Current through Register Vol. 24-23, December 1, 2024
Section 296-307-45015 - Additional precautions if recirculating ventilation system exhaust air into the workplace
(1) The employer must only recirculate air that contains no substance at a concentration that could pose a health or safety hazard to employees;
(2) The employer must make sure any exhaust system that recirculates air into the workplace:
(a) Passes the air through a device that removes contaminants;
(b) 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;
(c) Monitors the concentration of vapor from flammable or combustible liquids with approved equipment.

Notes:

1. 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.

2. Most substances will pose a health hazard at a concentration far below twenty-five percent of its LFL.

Wash. Admin. Code § 296-307-45015

Amended by WSR 20-21-091, Filed 10/20/2020, effective 11/20/2020

Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. 03-10-068, § 296-307-45015, filed 5/6/03, effective 8/1/03; 97-09-013, recodified as § 296-307-45015, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 96-22-048, § 296-306A-45015, filed 10/31/96, effective 12/1/96.