Complete the following questions
You need to show you step-by-step calculations and unit for credits.
1. A construction employee is using a grader, which produces 102.8 dB noise in the field.
Please calculate the maximum permissible time that the employee is allowed to work using
2. OSHA set the action level of 85 dB for TWA 8 hours. However, if employees work a 12
hours shift, what the action level will be?
Hint: for PEL calculation you need use the reference of 90 dBA and 5 dBA ER, but for action
level you will use the reference of 85 dBA and 5 dBA ER.
3. Read OSHA regulations, determine: 1) what basic components are the hearing conservation
program (HCP) in general industry (1910) required to have; 2) what’s action level for
construction industry; 3) if construction industries have hearing conservation program (HCP)
requirements. You need include the exact Standard Number.
4. If you use TLV instead of PEL as your guidance for noise evaluation, the maximum
allowable exposure time will be different. Please determine the TLV and PEL for 92.9 dBA
TWA 8 hours, and conclude the difference.
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