You are an industrial hygienist conducting personal sampling on a worker who is overseeing a production process involving use of acetone (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 1000 parts per million (ppm) of acetone). You are able to measure the following exposures:

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You are an industrial hygienist conducting personal sampling on a worker who is overseeing a production process involving use of acetone (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 1000 parts per million (ppm) of acetone). You are able to measure the following exposures:

Question 1 Please solve the following problem, indicating your response on a Word document and submitting the document via File Upload. Using the following formula, solve the problem below, and show your work. TWA = CaTa + CbTb + … + CnTn 8 TWA = Time-Weighted Average Ca = Concentration of contaminant during the sampling period “a” Ta = Time of sampling period “a” Cb = Concentration of contaminant during the sampling period “b” Tb = Time of sampling period “b” Cn = Concentration of contaminant during the sampling period “n”, where “n” is the last of a series of contaminants Tn = Time of sampling period “n” Note: All concentrations are in parts contaminant per million parts of air or milligrams of contaminant per cubic meter of air. Air Sampling Problem: You are an industrial hygienist that is conducting personal sampling on a worker who is overseeing a production process involving use of toluene (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 200 parts per million (ppm)). You are able to measure the following exposures: 500 ppm for 1 hour 100 ppm for 4 hours 225 ppm for 3 hours What is the calculated TWA? What would you tell plant management in terms of exposure to toluene and compliance with the PEL? Question 2 You are an industrial hygienist conducting personal sampling on a worker who is overseeing a production process involving use of acetone (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 1000 parts per million (ppm) of acetone). You are able to measure the following exposures: 700 ppm for 3 hours 1300 ppm for 2 hours 900 ppm for 3 hours What is the calculated TWA? What would you tell plant management in terms of exposure to acetone and compliance with the PEL?

Question 1 Please solve the following problem, indicating your response on a Word document and submitting the document via File Upload.

Using the following formula, solve the problem below, and show your work.

TWA = CaTa + CbTb + … + CnTn 8

TWA = Time-Weighted Average Ca = Concentration of contaminant during the sampling period “a” Ta = Time of sampling period “a” Cb = Concentration of contaminant during the sampling period “b” Tb = Time of sampling period “b” Cn = Concentration of contaminant during the sampling period “n”, where “n” is the last of a series of contaminants Tn = Time of sampling period “n”

Note: All concentrations are in parts contaminant per million parts of air or milligrams of contaminant per cubic meter of air.

Air Sampling Problem: You are an industrial hygienist that is conducting personal sampling on a worker who is overseeing a production process involving use of toluene (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 200 parts per million (ppm)). You are able to measure the following exposures:

500 ppm for 1 hour 100 ppm for 4 hours 225 ppm for 3 hours

What is the calculated TWA? What would you tell plant management in terms of exposure to toluene and compliance with the PEL?

Question 2 You are an industrial hygienist conducting personal sampling on a worker who is overseeing a production process involving use of acetone (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 1000 parts per million (ppm) of acetone). You are able to measure the following exposures:

700 ppm for 3 hours 1300 ppm for 2 hours 900 ppm for 3 hours

What is the calculated TWA? What would you tell plant management in terms of exposure to acetone and compliance with the PEL?


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