Heavy Metals in Contaminated Soils: A Review of Sources, Chemistry, Risks and Best Available Strategies for Remediation

Table 2

Target and intervention values for some metals for a standard soil [60].

Metal	Target value	Intervention value
	(mg kg^−1)	(mg kg^−1)
Ni	140.00	720.00
Cu	0.30	10.00
Zn	—	—
Cd	100.00	380.00
Pb	35.00	210.00
As	200	625
Cr	20	240
Hg	85	530