1.(20 pts) (LO 4,5) A painter is simultaneously exposed to toluene, methylene chloride, and turpentine vapors, which can be said to have additive liver effects.  If the 8-hr TWA exposures are determined by charcoal tube sampling to be 60 ppm toluene, 20 ppm methylene chloride, and 20 ppm turpentine, using OSHA’s PELs, has there been an overexposure? (show all work)

2. (16 pts) (LO 6) Identify at least two questions that should be asked when selecting appropriate eye protection for a particular occupational hazard. Give a reason (for each question) why it is important to know this information. 

3.(10 pts) (LO 2) Identify at least 5 factors that determine the duration and severity of noise-induced hearing loss.

4.(8 pts) (LO2) What do the terms presbyopia and presbycusis mean?

5.(8 pts) (LO4) What are the four potential routes of entry for chemical or biological exposures?

6. With respect to hearing loss:

a. (6 pts) Explain how OSHA defines whether a worker has a Standard Threshold Shift (STS) (explain, not copy).

b. (6 pts) Are all STSs recorded on the OSHA 300 Log? Why or why not? 

c. (6 pts) How is presbycusis addressed in this determination?

7.(20 pts) (LO 4,5) A worker is exposed to the following airborne concentrations of ethyl benzene:

What is the 8-hour Time Weighted Average exposure for the employee (show how you calculated the exposure)? Does it exceed the OSHA PEL?

1.(20 pts) (LO 4,5) A painter is simultaneously exposed to toluene, methylene chloride, and turpentine vapors, which can be said to have additive liver effects.  If the 8-hr TWA exposures are determined by charcoal tube sampling to be 60 ppm toluene, 20 ppm methylene chloride, and 20 ppm turpentine, using OSHA’s PELs, has there been an overexposure? (show all work)

2. (16 pts) (LO 6) Identify at least two questions that should be asked when selecting appropriate eye protection for a particular occupational hazard. Give a reason (for each question) why it is important to know this information. 

3.(10 pts) (LO 2) Identify at least 5 factors that determine the duration and severity of noise-induced hearing loss.

4.(8 pts) (LO2) What do the terms presbyopia and presbycusis mean?

5.(8 pts) (LO4) What are the four potential routes of entry for chemical or biological exposures?

6. With respect to hearing loss:

a. (6 pts) Explain how OSHA defines whether a worker has a Standard Threshold Shift (STS) (explain, not copy).

b. (6 pts) Are all STSs recorded on the OSHA 300 Log? Why or why not? 

c. (6 pts) How is presbycusis addressed in this determination?

7.(20 pts) (LO 4,5) A worker is exposed to the following airborne concentrations of ethyl benzene:

What is the 8-hour Time Weighted Average exposure for the employee (show how you calculated the exposure)? Does it exceed the OSHA PEL?

1.(20 pts) (LO 4,5) A painter is simultaneously exposed to toluene, methylene chloride, and turpentine vapors, which can be said to have additive liver effects.  If the 8-hr TWA exposures are determined by charcoal tube sampling to be 60 ppm toluene, 20 ppm methylene chloride, and 20 ppm turpentine, using OSHA’s PELs, has there been an overexposure? (show all work)

2. (16 pts) (LO 6) Identify at least two questions that should be asked when selecting appropriate eye protection for a particular occupational hazard. Give a reason (for each question) why it is important to know this information. 

3.(10 pts) (LO 2) Identify at least 5 factors that determine the duration and severity of noise-induced hearing loss.

4.(8 pts) (LO2) What do the terms presbyopia and presbycusis mean?

5.(8 pts) (LO4) What are the four potential routes of entry for chemical or biological exposures?

6. With respect to hearing loss:

a. (6 pts) Explain how OSHA defines whether a worker has a Standard Threshold Shift (STS) (explain, not copy).

b. (6 pts) Are all STSs recorded on the OSHA 300 Log? Why or why not? 

c. (6 pts) How is presbycusis addressed in this determination?

7.(20 pts) (LO 4,5) A worker is exposed to the following airborne concentrations of ethyl benzene:

What is the 8-hour Time Weighted Average exposure for the employee (show how you calculated the exposure)? Does it exceed the OSHA PEL?

1.(20 pts) (LO 4,5) A painter is simultaneously exposed to toluene, methylene chloride, and turpentine vapors, which can be said to have additive liver effects.  If the 8-hr TWA exposures are determined by charcoal tube sampling to be 60 ppm toluene, 20 ppm methylene chloride, and 20 ppm turpentine, using OSHA’s PELs, has there been an overexposure? (show all work) 1.(20 pts) (LO 4,5) A painter is simultaneously exposed to toluene, methylene chloride, and turpentine vapors, which can be said to have additive liver effects.  If the 8-hr TWA exposures are determined by charcoal tube sampling to be 60 ppm toluene, 20 ppm methylene chloride, and 20 ppm turpentine, using OSHA’s PELs, has there been an overexposure? (show all work)

2. (16 pts) (LO 6) Identify at least two questions that should be asked when selecting appropriate eye protection for a particular occupational hazard. Give a reason (for each question) why it is important to know this information.  2. (16 pts) (LO 6) Identify at least two questions that should be asked when selecting appropriate eye protection for a particular occupational hazard. Give a reason (for each question) why it is important to know this information. 

3.(10 pts) (LO 2) Identify at least 5 factors that determine the duration and severity of noise-induced hearing loss. 3.(10 pts) (LO 2) Identify at least 5 factors that determine the duration and severity of noise-induced hearing loss.

4.(8 pts) (LO2) What do the terms presbyopia and presbycusis mean? 4.(8 pts) (LO2) What do the terms presbyopia and presbycusis mean?

5.(8 pts) (LO4) What are the four potential routes of entry for chemical or biological exposures? 5.(8 pts) (LO4) What are the four potential routes of entry for chemical or biological exposures?

6. With respect to hearing loss: 6. With respect to hearing loss:

a. (6 pts) Explain how OSHA defines whether a worker has a Standard Threshold Shift (STS) (explain, not copy). a. (6 pts) Explain how OSHA defines whether a worker has a Standard Threshold Shift (STS) (explain, not copy).

b. (6 pts) Are all STSs recorded on the OSHA 300 Log? Why or why not?  b. (6 pts) Are all STSs recorded on the OSHA 300 Log? Why or why not? 

c. (6 pts) How is presbycusis addressed in this determination? c. (6 pts) How is presbycusis addressed in this determination?

7.(20 pts) (LO 4,5) A worker is exposed to the following airborne concentrations of ethyl benzene: 7.(20 pts) (LO 4,5) A worker is exposed to the following airborne concentrations of ethyl benzene:

What is the 8-hour Time Weighted Average exposure for the employee (show how you calculated the exposure)? Does it exceed the OSHA PEL? What is the 8-hour Time Weighted Average exposure for the employee (show how you calculated the exposure)? Does it exceed the OSHA PEL?

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