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Case study: control of methylene chloride exposures during furniture stripping.
Am Ind Hyg Assoc J 1996 Jan; 57(1):43-49
The control of occupational methylene-chloride (75092) exposure in a furniture stripping operation by ventilation modifications was described. A NIOSH Health Hazard Evaluation of a sheltered workshop furniture stripping operation identified time weighted average airborne exposures to methylene-chloride of 600 parts per million (ppm), 960ppm, and 1,1,52ppm, respectively, during three evaluations conducted over a period of about 4 months. At this time the facility had local exhaust ventilation in the stripping room which exhausted about 79 cubic meters/minute through a chemical absorption bed, and dilution ventilation in the rinsing room with an exhaust volume of 34 cubic meters/minute. Based on analyses that included observations of air movement in smoke tubes, it was recommended that the charcoal adsorption bed be removed, all doors to the stripping area remain open, and that a modified local exhaust system be installed. Selection of an appropriate local exhaust system was made following evaluation of three different hood configurations. All of the hoods tested, slot, downdraft, and a combination hood, substantially improved exposure conditions. The authors conclude that the control measures used at this facility may be applicable to other furniture stripping operations.
NIOSH-Author; Occupational-exposure; Exposure-levels; Furniture-industry; Chlorinated-hydrocarbons; Furniture-workers; Exhaust-ventilation; Control-technology
Issue of Publication
American Industrial Hygiene Association Journal
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division