Ground based in situ observations of bulk_sampler at Saint-Nazaire-le-Désert (FR0023R). 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: benz_a_anthracene in precip (mass_concentration_of_benz_a_anthracene_in_precipitation), benzo_a_pyrene in precip (mass_concentration_of_benzo_a_pyrene_in_precipitation), benzo_b_fluoranthene in precip (mass_concentration_of_benzo_b_fluoranthene_in_precipitation), benzo_j_fluoranthene in precip (mass_concentration_of_benzo_j_fluoranthene_in_precipitation), benzo_k_fluoranthene in precip (mass_concentration_of_benzo_k_fluoranthene_in_precipitation), dibenzo_ah_anthracene in precip (mass_concentration_of_dibenzo_ah_anthracene_in_precipitation), inden_123cd_pyrene in precip (mass_concentration_of_inden_123cd_pyrene_in_precipitation)