While sampling a painter for exposure to acetone vapors (a chemical commonly used for both cleaning parts prior to painting and as a paint thinner), the sampling pump ran at 0.5 L/min for 6 hours and 15 minutes while the worker was painting. The worker spent the remainder of the 8-hour shift unexposed to solvent vapors. The lab reported a result of 34.4 mg of acetone for the charcoal tube.

Determine the concentration so these values can be compared to the PEL-TWA or TLV-TWA). Calculate the air volume concentration. Calculations should be to three decimal points and include the unit of measurement, i.e., 0.853 mg/l or 853 mg/m3. Blank 1