Ground based in situ observations of high_vol_sampler at Ispra (IT0004R). These measurements are gathered as a part of the following projects EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: PCB_105 in aerosol (mass_concentration_of_polychlorinated_biphenyl_105_in_dry_aerosol_particles_in _air), PCB_114 in aerosol (mass_concentration_of_polychlorinated_biphenyl_114_in_dry_aerosol_particles_in _air), PCB_118 in aerosol (mass_concentration_of_polychlorinated_biphenyl_118_in_dry_aerosol_particles_in _air), PCB_123 in aerosol (mass_concentration_of_polychlorinated_biphenyl_123_in_dry_aerosol_particles_in _air), PCB_126 in aerosol (mass_concentration_of_polychlorinated_biphenyl_126_in_dry_aerosol_particles_in _air), PCB_156 in aerosol (mass_concentration_of_polychlorinated_biphenyl_156_in_dry_aerosol_particles_in _air), PCB_157 in aerosol (mass_concentration_of_polychlorinated_biphenyl_157_in_dry_aerosol_particles_in _air), PCB_167 in aerosol (mass_concentration_of_polychlorinated_biphenyl_167_in_dry_aerosol_particles_in _air), PCB_169 in aerosol (mass_concentration_of_polychlorinated_biphenyl_169_in_dry_aerosol_particles_in _air), PCB_189 in aerosol (mass_concentration_of_polychlorinated_biphenyl_189_in_dry_aerosol_particles_in _air), PCB_77 in aerosol (mass_concentration_of_polychlorinated_biphenyl_77_in_dry_aerosol_particles_in _air), PCB_81 in aerosol (mass_concentration_of_polychlorinated_biphenyl_81_in_dry_aerosol_particles_in _air)