Environmental Health Criteria 214

HUMAN EXPOSURE ASSESSMENT
samples values value
>LOQ 10 50 95 (GM)
Dustfalla 3282 - 1.4 21.0 579 4.52
Arsenicb 3279 965 < 4 33 1313 5.4
Boron 2896 511 < 0.06 0.64 47.1 0.13
Cadmiumb 3282 0 5 44 833 11.7
Calcium 3277 25 17 273 2679 51.2
Chromium 3282 14 0.02 0.28 3.92 0.07
Copper 3277 1167 < 0.3 1.5 48.8 0.33
Iron 3277 74 2 41 765 7.7
Lead 3282 0 0.11 1.17 86.6 0.29
Magnesium 3277 26 2 25 342 5.2
Phosphorus 3277 1063 < 1.8 17 542 2.8
Zinc 3277 15 0.9 8.6 108 2.2
Units are µg m-2d-1 unless otherwise indicated.
a mg m-2d-1 .
b ng m-2d-1 .
8.3 Sampling design considerations
Section 8.2.2 describes numerous innovative methods that have
been developed and used by researchers to collect settled dust from
surfaces. Many more examples can be found in the literature. However,
there has been little standardization among the methods. Differences
in vacuum pump flow rates, nozzle shapes and sizes, and sampling
technique will affect dust-pickup characteristics of vacuum sampling
methods and will, therefore, affect the results. Differences in wipe
sampling material and technique will also affect the results from wipe
samples. Different recovery rates of dust from alternative
sedimentation methods can also have a large effect on analytical
results. These differences among methods, which are not well
documented in the literature, can make interpretations and comparisons
between studies difficult. It is important that sampling methods are
well described when results from settled dust sampling are reported.
Sampling design considerations for soil should follow the
objectives of the study and consider the particular conditions of the
site being monitored. For example, multiple soil samples can be
obtained around the perimeter of a house at a sufficient distance so
that the soil is representative of material that might be tracked into
the home. In this case, the samples might be composited. Backyard soil
might vary in the number and amounts of contaminants present, as well
as usage and specific activities by residents. The number and location
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