immission

Lead is a toxic heavy metal and usually occurs bound to other substances. In ambient air lead is measured bound to particulate matter.

Nickel belongs to the heavy metals and usually occurs bound to other substances. In ambient air arsenic is measured bound to particulate matter.

Cadmium is toxic and cancerogenic. It belongs to the heavy metals and usually occurs bound to other substances. In ambient air arsenic is measured bound to particulate matter.

Benzo(a)pyrene is a polycyclic aromatic hydrocarbon. It is used as a marker for the carcinogenic risk of polycyclic aromatic hydrocarbons in ambient air.

Arsenic is toxic and can have metallic or non-metallic characteristics. It rarely occurs elementary but most of the time bound to other substances. In ambient air arsenic is measured bound to particulate matter.