A plant’s atmosphere has the following concentration of meth…
A plant’s atmosphere has the following concentration of methyl alcohol for the times shown: Methyl Alcohol (PEL 200 ppm) 8:00 AM – 10:00 AM 10 ppm 10:00 AM – 11:00 AM 30 ppm 11:00 AM – 12:00 PM 50 ppm 12:00 PM – 4: 00 PM 80 ppm Calculate both the action level (AL) and the equivalent 8-hour time-weighted average concentration (TWA), respectively.