Response to each question must be a minimum of 100 words and each answer must have a reference ;
Question 1. OSHA currently enforces an eight-hour, time-weighted average (TWA) PEL of 90 dBA, and uses a 5 dB exchange rate. NIOSH recommends an eight-hour TWA exposure limit of 85 dBA and a 3 dB exchange rate. The 85 dBA limit and 3 dB exchange rate is also used as a threshold limit value (TLV) by the American Conference of Governmental Industrial Hygienists (ACGIH) as well as many European countries. Discuss using a 5 dB exchange rate versus a 3 dB exchange rate in protecting workers' hearing. Make a case for the use of either the 90 dBA PEL and 5 dB exchange rate or the 85 dBA REL and a 3 dB exchange rate.
Question 2. Compare two methods used to evaluate an employee's inhalation exposure to a hazardous material. Which method do you believe provides the most accurate measure of an employee's exposure?
Question 3. Discuss the differences between ionizing and non-ionizing radiation. Provide one example of an occupational exposure to ionizing radiation and one to non-ionizing radiation. How do the differences influence the control methods used for these two types of radiation?
Question 4. Compare and contrast the different control methods that are commonly used for ionizing radiation.
Question 5. Compare and contrast the primary exposure routes for hazardous materials. How does the route of exposure influence the type of control method that you would recommend?