Ground based in situ observations of bulk_sampler at Birkenes (NO0001R). These measurements are gathered as a part of the following projects CAMP, EMEP, NILU and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: HCB in precip (mass_concentration_of_hexachlorobenzene_in_precipitation), PCB_101 in precip (mass_concentration_of_polychlorinated_biphenyl_101_in_precipitation), PCB_118 in precip (mass_concentration_of_polychlorinated_biphenyl_118_in_precipitation), PCB_138 in precip (mass_concentration_of_polychlorinated_biphenyl_138_in_precipitation), PCB_153 in precip (mass_concentration_of_polychlorinated_biphenyl_153_in_precipitation), PCB_180 in precip (mass_concentration_of_polychlorinated_biphenyl_180_in_precipitation), PCB_28 in precip (mass_concentration_of_polychlorinated_biphenyl_28_in_precipitation), PCB_52 in precip (mass_concentration_of_polychlorinated_biphenyl_52_in_precipitation), PCB_99 in precip (mass_concentration_of_polychlorinated_biphenyl_99_in_precipitation), alpha_HCH in precip (mass_concentration_of_alpha_hexachlorocyclohexane_in_precipitation), gamma_HCH in precip (mass_concentration_of_gamma_hexachlorocyclohexane_in_precipitation)