Toxic Metal	Mean $C_{s}^{i}$	$C_{n}^{i}$	$C_{f}^{i}$	$T_{r}^{i}$	$E_{r}^{i}$	Risk Grade
As	0.0063	13	4.85 × 10⁻⁰⁴	10	0.063	Slight
Cd	−0.0498	0.3	−1.66 × 10⁻⁰¹	30	−1.49	Slight
Cr	0.4527	90	5.03 × 10⁻⁰³	2	0.91	Slight
Cu	−0.0896	45	−1.99 × 10⁻⁰³	5	−0.45	Slight
Hg	−5.3507	0.4	−1.34 × 10¹	40	−214.03	Slight
Ni	0.6095	68	8.96 × 10⁻⁰³	6	3.66	Slight
Pb	7.1095	20	3.55 × 10⁻⁰¹	5	35.55	Medium
Zn	11.2861	95	1.19 × 10⁻⁰¹	1	11.29	Slight