Question

5. In Table Z-1 of the list of air contaminants regulated in 29 CFR 1910.1000 (General Industry standard), what is the 8-hour Permissible Exposure Limit (PEL) in parts per million (ppm) for a worker exposed to acetone on a production line:

Answer 1

An worker's exposure to any substance in table Z-1, the exposure limit of which is preceded by a "C", shall at no time exceed the exposure limit given for that substance, where "C" is concentration during any period of time T where the concentration remains constant.

An worker's exposure to any substance in table Z-1, the exposure limit of which is not preceded by "C" shall not exceed the 8-hour time weighted average given for that substance in any 8-hour work shift of a 40-hour work week.

According to table Z-1 of list of aur contaminants regulated in 29 CFR 1910.1000 (General industry standard), the 8-hour permissible exposure limit (PEL) for a worker exposed to acetone on a production line is 1000 ppm.

Also, The cumulative exposure for an 8-hour work shift shall be computed as follows-

E = (C^aT^a + C^bT^b + .......+ C^nT^n)÷8

Where, E is the equivalent exposure for the working shift.

C is the concentration during any period of time T where the concentration remains constant.

T is the duration in hours of the exposure at the concentration C.

Summary:- The 8-hour permissible exposure limit (PEL) for a worker exposed to acetone on a production line is 1000 ppm.