In-depth survey report: control technology for small business: evaluation of flexible duct-large hood ventilation for radiator repair at Hensley's Radiator Service, Inc., Charlottesville, Virginia.
NIOSH 1991 May; :1-31
The objective of this site visit to Hensley's Radiator Service (SIC- 7539), Charlottesville, Virginia was to evaluate and document the effectiveness of a control system in reducing exposure to airborne lead (7439921) during radiator repair operations. Each of the three radiator repair stations included a water bath, a work table and two compressed air/natural gas torches for burning and soldering. On average eight to ten radiators were repaired each day. However, during the peak summer season up to 15 radiators could be repaired in a day. Each of the three stations was equipped with local exhaust ventilation consisting of a canopy shaped exhaust hood connected to an 8 inch diameter flexible duct that permitted the hood to be moved directly to the work and source of lead fume generation. The ventilation effectively controlled lead emissions during hot weather with radiator repair activity near peak levels. Prior to the installation of the system the personal sampling data showed time weighted average (TWA) lead exposures for the radiator repair mechanics as high as 193 micrograms/cubic meter. The highest TWA after installation was 25 micrograms/cubic meter. The primary disadvantage of this control system was the need to frequently clean the electronic ionizer collectors.
NIOSH-Author; NIOSH-Survey; Field-Study; CT-172-14a; Region-3; Control-technology; Lead-fumes; Heavy-metals; Dust-control; Automobile-repair-shops; Occupational-exposure
Control Technology; Field Studies
NTIS Accession No.
National Institute for Occupational Safety and Health