Thirty-six technicians
in 10 repair shops were observed; a subset of nine technicians
in three shops that used a commercially available aerosol
product containing hexane, acetone, and toluene (Product #1)
participated in quantitative exposure measurements. These
measurements included task length, integrated breathing zone
(n = 23), and area (n = 49) samples for hexane, acetone,
toluene, methyl ethyl ketone (MEK) and mixed xylenes;
measurement of the solvent mass emitted during each task
(n=23); continuous measurement sampling of breathing zone
volatile organic compounds (VOCs) (n=1238); measurement
of air speed in the work areas (n = 780); and approximation
of the breathing zone air exchange rate.