Annex 3

(Art. 12 para. 1)

Concentration values for the assessment of the need for remediation of soil

The concentration values in the table below apply in the assessment of the need for remediation of soil. Where no concentration values are given in the table for potential soil pollutants which are polluting a site, the authority shall specify a value on a case by case basis with the consent of the FOEN and according to the provisions of the legislation on the protection of the environment.

1 Sites used for agricultural or horticultural purposes

Substance	Concentration value
Inorganic substances
Lead	2000 mg Pb/kg
Cadmium	30 mg Cd/kg
Copper	1000 mg Cu/kg
Zinc	2000 mg Zn/kg
Organic substances
Polychlorinated biphenyls (PCBs)	3 mg/kg
Polycyclic aromatic hydrocarbons (PAHs)*	100 mg/kg
Benzo-a-pyrene	10 mg/kg
* ∑16 EPA PAHs: napthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benz[a]anthracene, chrysene, benzo[a]pyrene, benzo[b]fluoranthene, benzo[k]fluoranthene, dibenz[a,h]anthracene, benzo[g,h,i]perylene, indeno[1,2,3-c,d]pyrene

2 Sites in private gardens and allotments, children’s playgrounds and other facilities where children play regularly

Substance	Concentration value
Inorganic substances
Antimony	50 mg Sb/kg
Arsenic	50 mg As/kg
Lead	300 mg Pb/kg
Cadmium	20 mg Cd/kg
Chromium (VI)	100 mg CrVI/kg
Copper	1000 mg Cu/kg
Nickel	1000 mg Ni/kg
Mercury	2 mg Hg/kg
Silver	500 mg Ag/kg
Zinc	2000 mg Zn/kg
Inorganic substances
Volatile chlorinated hydrocarbons*	1 mg/kg
Polychlorinated biphenyls (PCBs)**	1 mg/kg
Aliphatic hydrocarbons C5–C10***	5 mg/kg
Aliphatic hydrocarbons C11–C40	500 mg/kg
Benzene	1 mg/kg
Polycyclic aromatic hydrocarbons (PAHs)****	10 mg/kg
Benzo[a]pyrene	1 mg/kg
| Dioxins and dioxin-like substances (PCDDs, PCDFs and dl-PCBs)***** | 20 ng TEQ/kg | | --- | --- |	20 ng TEQ/kg
* ∑7 volatile chlorinated hydrocarbons: dichloromethane, trichloromethane, tetrachloromethane, cis-1,2-dichloroethylene, 1,1,1-trichloroethane, trichloroethylene (TCE), tetrachlorethylene (PERC)
** ∑6 PCB congeners × 4.3: no. 28, 52, 101, 138, 153, 180
*** ∑C5- to C10hydrocarbons: area of the FID-chromatogram between n-pentane and n‑decane, multiplied by the response factor of n-hexane, minus ∑BTEX
***** ∑16 EPA PAHs: napthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benz-a-anthracene, chrysene, benzo[a]pyrene, benzo[b]fluoranthene, benzo[k]fluoranthene, dibenz[a,h]anthracene, benzo[g,h,i]perylene, indeno[1,2,3-c,d]pyrene
***** ∑29 Congeners of polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF) and dioxin-like polychlorinated biphenyls (dl-PCB) according to WHO22-TEF