weighted average BC regulatory limits (10 lg m3 for
As, Cd, and Cr and 50 lg m3 for Ni and Pb) (WorkSafeBC,
2010a). It was clear that there were minimal
differences between the exposed and control sites and
for at least one metal (Ni) airborne levels were higher
at control Site M than at the other sites.
Skin exposures are shown in Table 2 (units are
nanograms per square centimeter skin). As and Cd
were found at detectable levels in 5 of the 51 samples;
therefore, only ranges of As and Cd concentrations
are shown. Cr, Ni, and Pb were detected on all
samples. The ranges seen for these three metals were
similar across all five sites and in linear regression
analysis, controlling for smoking status and metals
in soil and seedling rootballs, Cr, Ni, and Pb on skin
were not significantly elevated in the group that used
fertilizer. The control site (M) had the second lowest
level for Cr, but the second to highest level for Pb
and Ni. Dermal lead exposure was significantly higher
at the control site where fertilizer was not used.
weighted average BC regulatory limits (10 lg m3 forAs, Cd, and Cr and 50 lg m3 for Ni and Pb) (WorkSafeBC,2010a). It was clear that there were minimaldifferences between the exposed and control sites andfor at least one metal (Ni) airborne levels were higherat control Site M than at the other sites.Skin exposures are shown in Table 2 (units arenanograms per square centimeter skin). As and Cdwere found at detectable levels in 5 of the 51 samples;therefore, only ranges of As and Cd concentrationsare shown. Cr, Ni, and Pb were detected on allsamples. The ranges seen for these three metals weresimilar across all five sites and in linear regressionanalysis, controlling for smoking status and metalsin soil and seedling rootballs, Cr, Ni, and Pb on skinwere not significantly elevated in the group that usedfertilizer. The control site (M) had the second lowestlevel for Cr, but the second to highest level for Pband Ni. Dermal lead exposure was significantly higherat the control site where fertilizer was not used.
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