Text For Citation: 01 Item/Group: 003A Hazard:

29 CFR 1910.1000(a)(2): Employee(s) were exposed to an airborne concentration of particulates not otherwise regulated (total dust), listed in Table Z-1 in excess of the 8-hour Time-Weighted Average concentration of 15 milligrams per meter cubed (mg/m3). (a) On October 12, 2023, an employee [mixer, Room 6] was exposed to an 8-hour time-weighted average (TWA) of 21.1 milligrams per meter cubed (mg/m3) of particulates not otherwise regulated (total dust), approximately 1.4 times the Permissible Exposure Limit (PEL) of 15 mg/m3. The exposure level was derived from samples collected over a 390-minute sampling period with zero exposure assumed for the unsampled period of 90 minutes. The limit is established to prevent employees from suffering adverse health effects, such as target organ damage to the eyes, skin or respiratory system. (b) On October 12, 2023, an employee [mixer, Room 5] was exposed to an 8-hour time-weighted average (TWA) of 36 milligrams per meter cubed (mg/m3) of particulates not otherwise regulated (total dust), approximately 2.4 times the Permissible Exposure Limit (PEL) of 15 mg/m3. The exposure level was derived from samples collected over a 393-minute sampling period with zero exposure assumed for the unsampled period of 87 minutes. The limit is established to prevent employees from suffering adverse health effects, such as target organ damage to the eyes, skin or respiratory system. (c) On October 12, 2023, an employee [mixer, Room 1] was exposed to an 8-hour time-weighted average (TWA) of 47 milligrams per meter cubed (mg/m3) of particulates not otherwise regulated (total dust), approximately 3.1 times the Permissible Exposure Limit (PEL) of 15 mg/m3. The exposure level was derived from samples collected over a 370-minute sampling period with zero exposure assumed for the unsampled period of 110 minutes. The limit is established to prevent employees from suffering adverse health effects such as target organ damage to the eyes, skin or respiratory system. (d) On October 12, 2023, an employee [mixer, Room 4] was exposed to an 8-hour time-weighted average (TWA) of 52.5 milligrams per meter cubed (mg/m3) of particulates not otherwise regulated (total dust), approximately 3.5 times the Permissible Exposure Limit (PEL) of 15 mg/m3. The exposure level was derived from samples collected over a 400-minute sampling period with zero exposure assumed for the unsampled period of 80 minutes. The limit is established to prevent employees from suffering adverse health effects, such as target organ damage to the eyes, skin or respiratory system. (e) On October 12, 2023, an employee [mixer, Room 2] was exposed to an 8-hour time-weighted average (TWA) of 67 milligrams per meter cubed (mg/m3) of particulates not otherwise regulated (total dust), approximately 4.5 times the Permissible Exposure Limit (PEL) of 15 mg/m3. The exposure level was derived from samples collected over a 385-minute sampling period with zero exposure assumed for the unsampled period of 95 minutes. The limit is established to prevent employees from suffering adverse health effects such as target organ damage to the eyes, skin or respiratory system. (f) On October 12, 2023, an employee [mixer, Room 4] was exposed to an 8-hour time weighted average (TWA) of 175 milligrams per meter cubed (mg/m3) of particulates not otherwise regulated (total dust), approximately 11.7 times the Permissible Exposure Limit (PEL) of 15 mg/m3. The exposure level was derived from samples collected over a 402-minute sampling period with zero exposure assumed for the unsampled period of 78 minutes. The limit is established to prevent employees from suffering adverse health effects such as target organ damage to the eyes, skin or respiratory system.