( b ) Prepare anthropogenic heavy metal and POPs emissions data as input for operational modelling based on gridded emission dataset provided by CEIP ; ( c ) Calculate heavy metal ( lead , cadmium and mercury ) and POP ( polycyclic aromatic hydrocarbons ( PAHs ) , polychlorinated biphenyls ( PCBs ) , dibenzo-p-dioxins and dibenzofurans ( PCDD/Fs ) , and hexachlorocyclohexane ( γ-HCH ) air concentrations and ecosystem-dependent deposition fluxes over the extended EMEP domain for 2009 ; ( d ) Compute country-to-country deposition matrices for heavy metals and POPs ( benzo [ a ] pyrene ( B [ a ] P ) , PCDD/Fs and PCBs ) for 2009 ; ( e ) Estimate heavy metal and POP deposition to regional seas ( the Baltic , Black , Caspian , Mediterranean and North Seas ) ;