Text For Citation: 01 Item/Group: 009B Hazard:

29 CFR 1915.1000(d)(1)(i): When determined by the computational formula specified in 29 CFR 1915.1000(d)(2)(i), employees were exposed to concentrations of more than one substance for which 8-hour time weighted averages are listed in Subparts Z of 29 CFR part 1910 in excess of the permissible exposure for the mixture: (a) Herbert C. Jackson; The employer did not ensure that employee exposure to concentrations of more than one substance does not exceed the permissible exposure for the mixture of heavy metals to include iron oxide fume, copper fume, and inorganic lead. The mixture has additive toxic effects on the central nervous system, respiratory system, and the eyes. This violation occurred on February 10, 2016 where the employee was welding in the Engine Room. The employee was exposed to iron oxide fume at an 8-hour time weighted average (TWA) of 1.7864 milligrams per cubic meter (mg/m3) of air, approximately 0.18 times the permissible exposure limit (PEL) of 10 mg/m3; copper fume at an 8-hour TWA of 0.0055 mg/m3 of air, approximately 0.055 times the PEL of 0.1 mg/m3; and lead at an 8-hour TWA of 0.0476 mg/m3 of air, approximately 0.95 times the PEL of 0.05 mg/m3. The exposure concentration was approximately 1.19 times the permissible 8-hour TWA concentration for the mixture. Sampling was performed for 293 minutes. Zero exposure was assumed for the 187 minute period not sampled. (b) Herbert C. Jackson; The employer did not ensure that employee exposure to concentrations of more than one substance does not exceed the permissible exposure for the mixture of heavy metals to include iron oxide fume, copper fume, inorganic lead, and zinc oxide fume. The mixture has additive toxic effects on the central nervous system, respiratory system, and the eyes. This violation occurred on February 10, 2016 where the employee was welding in the conveyor tunnel. The employee was exposed to iron oxide fume at an 8-hour time weighted average (TWA) of 6.2531 milligrams per cubic meter (mg/m3) of air, approximately 0.63 times the permissible exposure limit (PEL) of 10 mg/m3; copper fume at an 8-hour TWA of 0.0104 mg/m3 of air, approximately 0.10 times the PEL of 0.1 mg/m3; lead at an 8-hour TWA of 0.0176 mg/m3 of air, approximately 0.35 times the PEL of 0.05 mg/m3, and zinc oxide fume at an 8-hour TWA of 0.0299 mg/m3 of air, approximately 0.006 times the PEL of 5.0 mg/m3.The exposure concentration was approximately 1.09 times the permissible 8-hour TWA concentration for the mixture. Sampling was performed for 324 minutes. Zero exposure was assumed for the 156 minute period not sampled. (c) Herbert C. Jackson; The employer did not ensure that employee exposure to concentrations of more than one substance does not exceed the permissible exposure for the mixture of heavy metals to include iron oxide fume, copper fume, inorganic lead, and zinc oxide fume. The mixture has additive toxic effects on the central nervous system, respiratory system, and the eyes. This violation occurred on February 10, 2016 where the employee was welding in the conveyor tunnel. The employee was exposed to iron oxide fume at an 8-hour time weighted average (TWA) of 6.9224 milligrams per cubic meter (mg/m3) of air, approximately 0.69 times the permissible exposure limit (PEL) of 10 mg/m3; copper fume at an 8-hour TWA of 0.0132 mg/m3 of air, approximately 0.13 times the PEL of 0.1 mg/m3; lead at an 8-hour TWA of 0.0145 mg/m3 of air, approximately 0.29 times the PEL of 0.05 mg/m3, and zinc oxide fume at an 8-hour TWA of 0.0936 mg/m3 of air, approximately 0.019 times the PEL of 5.0 mg/m3.The exposure concentration was approximately 1.13 times the permissible 8-hour TWA concentration for the mixture. Sampling was performed for 374 minutes. Zero exposure was assumed for the 106 minute period not sampled.