Breathing Zone Exposure Assessment - Aerosols: Measurement, Dosimetry, and Health Effects - page 41

Inlet

Inlet

(a) (b)

Inlet

Pump

(c)

FIGURE 2.3 Alternate personal exposure inlet locations for estimating BZ exposures: (a) waist pack,
(b) backpack, and (c) cart pulled by participant.

important as the consistency and representativeness of the data. The lower ilter face velocities of
typical personal exposures samplers possibly result in signiicantly higher collected aerosol mass
concentrations in warmer environments compared to high-low-rate ixed-locations samplers, due
to reduced loss of volatile species. However, a Monte Carlo simulation analysis showed that either
low-low PEM or high-low MEM mass concentrations would likely have produced statistically
equivalent associations with concurrent adverse health effects.

2.4.2 s aMPling by c ontaMinant t yPe and i ntegration i nterval
The application of speciic contaminant categories (e.g., coarse aerosols) can accentuate speciic
performance areas such as accuracy, sampling artifacts, and representativeness. While this level of
detail is beyond the scope of this chapter, it is appropriate to identify selected sources for additional
information on BZ exposure assessment. Sources of information describing speciic sampling