Answer :
Final answer:
The noise exposure compliance of Dorben Co. cannot be definitively determined without calculated 8-hour TWA.
Explanation:
The question pertains to noise regulations and standards in business operations, specifically for the Dorben Co.. To determine if the company is in compliance with existing noise regulation, we will have to consider the noise thresholds set out by an authoritative body like the Occupational Safety and Health Administration (OSHA) in the United States. OSHA has set the permissible noise exposure limit at an 8-hour time-weighted average (TWA) of 85 decibels measured on the A scale (dBA). In this case, the workers at Dorben Co. are exposed to various sources of noise levels: 1 hour at 95 dBA, 1 hour at 85 dBA, 1 hour at 100 dBA, and 3 hours at 90 dBA. This equals an exposure of 6 hours, not 8, so we have to extrapolate for the full shift duration.
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