Table 3 in which Cr has the least concentration but has a high value between the ages 21 - 31 and ≥ 43 and As has the highest concentration followed by Pb and Cd.
The total mean concentrations of the metals (mg/kg) were Cr = 2.70 ± 0.7, Cd = 27.8 ± 8.0, Pb = 73.8 ± 42.3 and As = 222 ± 34.1 as also shown