Answer :
Final answer:
Contractor's responsibilities Protective clothing must be provided and used by contractors when airborne exposure exceeds certain limits set by regulatory agencies.
Explanation:
In the context of a contractor's responsibilities, the use of protective clothing is required when airborne exposure exceeds the TWA (Time-Weighted Average) and excursion limits.
These limits are set by regulatory agencies and are specific to the type of hazardous substance involved.
Protective clothing is used to minimize exposure and prevent contamination of workers and the work environment.
The requirement for a contractor to provide and require the use of protective clothing in the context of asbestos-related work is outlined in regulations.
Occupational Safety and Health Administration (OSHA) in the United States.
The specific scenarios in which protective clothing is required may vary depending on the work classification and exposure levels.
Let's break down the options:
A. "When Class II work requires removal of ACM exceeding 10 square feet" -
This statement is partially correct. For Class II asbestos work, OSHA does have specific requirements for protective clothing.
However, the square footage limit alone is not the sole determinant.
Protective clothing is required for Class II work, but the specific quantity of asbestos-containing material (ACM) removed exceeding 10 square feet is not the sole criteria.
There are other factors to consider, such as the type of ACM and the control measures in place.
B. "When airborne exposure exceeds the TWA and excursion limits" -
This statement is generally correct. OSHA has established permissible exposure limits (PELs) for asbestos, including the Time-Weighted Average (TWA) and excursion limits.
If airborne exposure levels exceed these established limits, protective clothing is generally required.
C. "When Class II work requires removal of TSI exceeding 25 linear feet" - This statement is not a standard criterion for requiring protective clothing.
The criteria for protective clothing in Class II asbestos work are not typically based on linear footage of Thermal System Insulation (TSI) removal.
D. "When a negative exposure assessment is produced" - This statement is not accurate.
A negative exposure assessment might indicate that protective clothing is not required.
But it is not the primary condition for determining when to provide and require protective clothing.
The most accurate answer based on standard regulations and practices related to asbestos work is:
B. "When airborne exposure exceeds the TWA and excursion limits."
However, it's essential to consult specific OSHA regulations and guidelines applicable to the asbestos-related work being performed to ensure compliance with safety requirements.
Requirements may vary depending on the type of asbestos work, the specific circumstances, and any updates or changes in regulations since my last knowledge update in September 2021.
Learn more about Contractor's responsibilities
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