$($T$/$F$)$ Joe, worker at a plant which produces a chemical which as PEL of $10ppm.$ Joe is working for $10$ hours a day and his average exposure is $10ppm.$ So$,$ the plant is in compliance with PEL regulations.

Use OSHA method to correct the PEL for his work duration.

Use ABIH equation to correct the PEL $($standard value which is $10ppm).$