In-depth survey report: control technology for removing lead-based paint from steel structures: abrasive blasting using steel grit with recycling at I-75 bridge (project 255-92), Corcon, Inc., Dayton, Ohio, report no. CT-183-12a.
NIOSH 1993 Jun; :1-39
Control measures used to lessen worker exposures to hazardous materials at the I-75 Bridge Project (SIC-1721, SIC-1622) in Dayton, Ohio were evaluated. The project included removing the old lead (7439921) based coating using recyclable steel grit to obtain a blasted steel finish grade, containing and collecting the waste, and protecting the steel by applying lead free paints. A containment system was constructed around the bridge structure. During the sample period the personal breathing zone lead exposure of the recycle screen cleaner was 9,100 micrograms/cubic meter which was significantly greater than the current OSHA standard of 200 micrograms/cubic meter. The abrasive blast CE type respirators did not provide adequate protection within the containment. Lead exposure to support personnel using half mask respirators fitted with dust filters was below the 50 microgram/cubic meter level. The authors recommend that an engineering control such as local exhaust and/or a mechanical screen shaker, be incorporated into the grit unloading process to reduce the lead exposure to below 50 micrograms/cubic meter. The contractor should continue to provide periodic medical monitoring for lead exposure. All workers should wash before eating, drinking or smoking and they should remove themselves from the immediate area when engaging in these activities. Workers should also use hearing protection.
NIOSH-Author; NIOSH-Survey; Field-Study; CT-183-12a; Region-5; Control-technology; Metal-dusts; Dust-exposure; Respiratory-protection; Construction-workers; Personal-protective-equipment; Occupational-exposure; Lead-dust
Field Studies; Control Technology
NTIS Accession No.
National Institute for Occupational Safety and Health