Lead in soil determinations
Parallel to this study, other group [14] worked on lead
in soil concentrations and their impact on risk assessment
of adverse health effects in children. From this
effort, we obtained the lead in soil concentrations in the
neighboring areas of all the studied schools except those
marked with the numbers 1, 8 and 9 (Figure 1). In this
study, samples were only taken in a perimeter with
radio of 2.5 km from the smelter, because is the area
officially recognized as environmentally affected by
metal emissions.
In order to compare the lead in soil concentrations to
that before environmental intervention began, we presented
lead in soil concentrations from 1999 in the