Ordinance
on the Reduction of Risks relating to the Use of Certain Particularly Dangerous Substances, Preparations and Articles
(Chemical Risk Reduction Ordinance, ORRChem)

In­or­gan­ic ar­sen­ic (As)

40

Cad­mi­um (Cd)

1.5

Hexa­valent chro­mi­um (Cr VI)

2

Cop­per (Cu)

200

Mer­cury (Hg)

1

Nick­el (Ni)

50*

Lead (Pb)

120

Zinc (Zn)

500

*

In the cases of grow­ing me­dia that con­sist of more than 70 % min­er­al sub­stances, the lim­it value ap­plies to the bioavail­able con­tent of the pol­lut­ant.

Poly­cyc­lic aro­mat­ic hy­dro­car­bons (PAH)

4 mil­li­grams per kilo­gram of dry mat­ter¹

Di­ox­ine (PCDD) and fur­ane (PCDF)

20 nano­grams WHO₂₀₀₅-TEQ²per kilo­gram of dry mat­ter

¹

Sum of the fol­low­ing 16 PAH com­pounds on the EPA pri­or­ity pol­lut­ants list: napthalene, acenaph­thyl­ene, acenaph­thene, fluorene, phen­an­threne, an­thra­cene, fluor­anthene, pyrene, benzo[a]an­thra­cene, chrysene, enzo[b]fluor­anthene, benzo[k]fluor­anthene, benzo[a]pyrene, in­deno[1,2,3-cd]pyrene, dibenzo[a,h]an­thra­cene and benzo[ghi]perylene.

²

Tox­ic equi­val­ency as re­com­men­ded by the World Health Or­gan­isa­tion (WHO) fol­low­ing a con­sulta­tion of ex­perts in 2005. Ref­er­ence: Mar­tin van den Berg et al. (2006) The 2005 World Health Or­gan­iz­a­tion Re-eval­u­ation of Hu­man and Mam­mali­an Tox­ic Equi­val­ency Factors for Di­ox­ins and Di­ox­in-Like Com­pounds. Tox­ic­o­lo­gic­al sci­ence 93(2):223–241. ht­tps://doi.org/10.1093/tox­sci/kfl055.