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

29 CFR 1926.55(a): Employee(s) were exposed to material(s) at concentrations above those specified in the Threshold Limit Values of Airborne Contaminants for 1970 of the American Conference of Governmental Industrial Hygienists: On or about November 9, 2017, the employer did not ensure employees engaged in abrasive blasting within bridge containment were exposed to air particulates such as, but not limited to, zinc oxide and iron oxide to below recommended permissible exposure limits. Instance A An employee was over exposed to iron oxide particulate at an eight hour time weighted average of 137.52 mg/m3 which exceeded the permissible exposure limit for total particulates of 15 mg/m3, by approximately 916%. Instance B An employee was over exposed to zinc oxide particulate at an eight hour time weighted average of 22.23 mg/m3 which exceeded the permissible exposure limit for total particulates of 15 mg/m3, by approximately 148%. An employee was over exposed to iron oxide particulate at an eight hour time weighted average of 143.01 mg/m3 which exceeded the permissible exposure limit for total particulates of 15 mg/m3, by approximately 953%.