can you answer 1,2,and 3 and show your work?

Example: A welder is performing stick welding on a piece of galvanized steel. In the process he is exposed to 13 me/m3 of manganese fume for 3 hours and 18 me/m3 of manganese fume for a total of 5 hours. Calculate the 8 b time weight average of the employee and determine if an over exposure has occurred 8 hour TWA=T1C1+T2C2+ Tng /8 ht 3(13) + 5(18)/8= 16.1 mg/m3 1. Using the compliance formula calculate the 8 hour time weight average for the following employee exposure to acetic acid based on hours sampled and reported concentration (result) from the lab. Indicate if an over exposure is present. The general industry PEL for toluene is 250 ppm. 1 hour @289 ppm 2 hours @5ppm 3 hours @ 200 ppm 2 hours @ 70 ppm I 2. Using the TWA compliance formula calculate the time weight average for the following employee exposure to iron oxide based on hours sampled and reported concentration. Determine is an over exposure exists if the PEL for Iron Oxide is 15 mg/m3. 3 hours @ 5 mg/m 1 hour @ 45 mg/m 4 hours @ 3 mg/m3 3. Calculate the 8 TWA based on the following reported lab values and time of exposure. In addition determine of the employee is over exposed if the PEL for acetone is 1,000 ppm. Convert minutes to hours 60 minutes @ 752 ppm 2 hours @ 100 ppm 60 minutes @ 1,839 ppm 4 hours @2,596 ppm Example: A welder is performing stick welding on a piece of galvanized steel. In the process he is exposed to 13 me/m3 of manganese fume for 3 hours and 18 me/m3 of manganese fume for a total of 5 hours. Calculate the 8 b time weight average of the employee and determine if an over exposure has occurred 8 hour TWA=T1C1+T2C2+ Tng /8 ht 3(13) + 5(18)/8= 16.1 mg/m3 1. Using the compliance formula calculate the 8 hour time weight average for the following employee exposure to acetic acid based on hours sampled and reported concentration (result) from the lab. Indicate if an over exposure is present. The general industry PEL for toluene is 250 ppm. 1 hour @289 ppm 2 hours @5ppm 3 hours @ 200 ppm 2 hours @ 70 ppm I 2. Using the TWA compliance formula calculate the time weight average for the following employee exposure to iron oxide based on hours sampled and reported concentration. Determine is an over exposure exists if the PEL for Iron Oxide is 15 mg/m3. 3 hours @ 5 mg/m 1 hour @ 45 mg/m 4 hours @ 3 mg/m3 3. Calculate the 8 TWA based on the following reported lab values and time of exposure. In addition determine of the employee is over exposed if the PEL for acetone is 1,000 ppm. Convert minutes to hours 60 minutes @ 752 ppm 2 hours @ 100 ppm 60 minutes @ 1,839 ppm 4 hours @2,596 ppm