Isolated coke plant as a pollution source causes soil contamination mainly by PAHs.
Soils around multi-pollution sources are enriched by TMPs, PAHs and heavy metals.
PLI index show higher level of contamination in case of multi-pollution sources.
Coke plants cause large increase in PAH content, mainly those of 4–5 aromatic rings.
Sources of pollution were distinguished by diagnostic ratios of individual PAHs.