Ground based in situ observations of filter_1pack at Lahemaa (EE0009R). 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: benzo_a_pyrene in air+aerosol (mass_concentration_of_benzo_a_pyrene_in_aerosol), cadmium in aerosol (mass_concentration_of_cadmium_in_dry_aerosol_particles_in _air), lead in aerosol (mass_concentration_of_lead_in_dry_aerosol_particles_in _air), nickel in aerosol (mass_concentration_of_nickel_in_dry_aerosol_particles_in _air), pm10_mass in pm10 (mass_concentration_of_pm10_ambient_aerosol_particles_in_air)