Pollutants in ambient air in an examination area can be determined by using
atmospheric dispersion models, bioindication methods or measurements. The
additional atmospheric pollution and deposition is calculated from real emi
ssion data of a modern industrial plant and appraised in reference to backg
round values. The calculated results were less than 1 % of the background v
alues of clean air areas for most of the components and 1 to 5 % of the bac
kground values for NOX, Hg, Ni and PCDD/F. Regarding constant deposition ra
tes, hypothetical periods of 10.000 to 70 Mio. years are calculated until r
eference values according to the federal ordinance on soil protection (BBod
SchV) are reached. Only in specific cases an impact caused by a specific in
dustrial plant with modern flue gas treatment is detectable.