Table 3.

Summary of mean metal concentration for youth primary moss samples, mean difference between youth primary and replicate samples and mean difference between youth primary, and expert replicate samples for each priority metal.

Metal	Youth Primary Sample Mean Concentration ± SD (mg/kg) (n = 61)	Youth–Youth Mean Difference ± SD (mg/kg) (n = 18)	Youth–Expert Mean Difference ± SD (mg/kg) (n = 17)
As	1.184 ± 0.642	0.110 ± 0.370	−0.013 ± 0.513
Cd	0.560 ± 0.386	−0.007 ± 0.194	−0.147 ± 0.340
Co	1.827 ± 1.738	0.084 ± 0.283	0.453 ± 0.534
Cr	16.835 ± 12.722	1.096 ± 3.500	4.449 ± 6.204
Ni	7.937 ± 7.902	0.430 ± 1.613	1.435 ± 3.384
Pb	23.860 ± 18.731	1.893 ± 3.525	7.195 ± 12.663