Text For Citation: 01 Item/Group: 003A 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 was not kept below the levels specified in 1910.1000. On or about December 12, 2017 employees abrasive blasting with coal slag inside Building 8 had respirable dust exposure that exceeded the OSHA 8 hour time weighed average permissible exposure limit of 5.0 mg/m3. a. An employee engaged in abrasive blasting activities on December 12, 2017 was exposed to particles not otherwise regulated respriable fraction as an 8 hour time weighted average of 14.71 mg/m3, approximately 2.9 times the permissible exposure limit of 5.0 mg/m3; this limit was established to prevent adverse health effects. The abrasive blaster used virgin coal slag to abrasive blast media to blast various pieces of metal. The exposure level was derived from three samples collected over 278 minutes, the remaining 202 minutes was calculated as zero (0) exposure time. b.An employee engaged in abrasive blasting activities on December 12, 2017 was exposed to particles not otherwise regulated respriable fraction as an 8 hour time weighted average of 13.82 mg/m3, approximately 2.7 times the permissible exposure limit of 5.0 mg/m3; this limit was established to prevent adverse health effects. The abrasive blaster used virgin coal slag to abrasive blast media to blast various pieces of metal. The exposure level was derived from three samples collected over 274 minutes, the remaining 206 minutes was calculated as zero (0) exposure time.