Element or compound

Concentration (µg/g)

Arsenic (As)

2

Barium (Ba)

50

Cadmium (Cd)

0.2

Cobalt (Co)

25

Chrome (Cr) (VI)

0.2

Copper (Cu) soluble

25

Mercury (Hg)

0.2

Nickel (Ni)

As low as possible

Lead (Pb)

2

Selenium (Se)

2

Antimony (Sb)

2

Tin (Sn)

50

Zinc (Zn)

50