Text For Citation: 01 Item/Group: 001A Hazard:

29 CFR 1910.94(a)(2)(ii):The concentration of respirable dust or fume in the breathing zone of the abrasive-blasting operator or any other worker shall be kept below the levels specified in 1910.1000. On June 13, 2022, employees' abrasive blasting respirable dust exposures exceeded 5.0 mg/3, as an 8-hour time weighted average. a. An employee engaged in abrasive blasting activities on June 13, 2022, and was exposed to particles not otherwise regulated respriable fraction as an 8 hour time weighted average of 9.47 mg/m3, approximately 1.9 times the permissible exposure limit of 5.0 mg/m3; this limit was established to prevent adverse health effects. The abrasive blaster used coal slag/glass mixture to abrasive blast media to blast various pieces of metal. The exposure level was derived from three samples collected over 269 minutes, the remaining 211 minutes was calculated as zero (0) exposure time. b. An employee engaged in abrasive blasting activities on June 13, 2022, and was exposed to particles not otherwise regulated respriable fraction as an 8 hour time weighted average of 551.05 mg/m3, approximately 110 times the permissible exposure limit of 5.0 mg/m3; this limit was established to prevent adverse health effects. The abrasive blaster used coal slag/glass mixture to abrasive blast media to blast various pieces of metal. The exposure level was derived from three samples collected over 345 minutes, the remaining 135 minutes was calculated as zero (0) exposure time.