Text For Citation: 01 Item/Group: 012A Hazard:

29 CFR 1910.1000(c): An employee(s) was exposed to respirable silica in excess of the 8-hour time weighted average limits of based on silica calculation listed in Table Z-3: (a) In Foundry #1 copper casting cleaning area, on or about March 30, 2016, an employee who was operating a die grinder when cleaning copper castings was exposed to respirable silica at an 8 hour Time-Weighted Average level of 0.89 mg/m3, which is approximately 1.96 times the Permissible Exposure Limit for respirable silica of 0.455 mg/m3. The exposure level is derived from a sample collected over a 428 minute sampling period; the calculations include a zero value for the 52 minutes not sampled. (b) In Foundry #1 sand reclamation area, on or about March 30, 2016, an employee who was engaged in sand reclamation was exposed to respirable silica at an 8 hour Time-Weighted Average level of 0.865 mg/m3, which is approximately 1.12 times the Permissible Exposure Limit for respirable silica of 0.769 mg/m3. The exposure level is derived from a sample collected over a 415 minute sampling period; the calculations include a zero value for the 65 minutes not sampled.