Cresols are widely occurring natural and manufactured aromatic organic compounds having a yellowish to brownish-red tint, a distinctive "coal tar" aroma, and melting points near room temperature.The name cresol (creosol) reflects their traditional source, creosote.One isomer (p-Cresol) is used as a solvent in metal cleaning.One of the maintenance workers was exposed to airborne particulates containing cresol.The worker works four 10-hour days each week.An air monitoring device that sampled air in the breathing zone was attached to the worker during a typical workday and produced the results illustrated

Calculate the 8-hour time-weighted average (TWA) of worker exposure based on the information provided below to determine if the worker has been exposed above the OEL. Calculate to one decimal point include the unit of measurement i.e., 14.6 mg/m³. Blank 1

Was this worker exposed to this chemical above the PEL-TWA? (yes or no) Blank 2

Was this worker exposed to this chemical above the TLV-TWA? (yes or no) Blank 3