Ground based in situ observations of high_vol_sampler at High Muffles (GB0014R). These measurements are gathered as a part of the following projects CAMP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: benz_a_anthracene in pm10 (mass_concentration_of_benz_a_anthracene_in_pm10_in_air), benzo_b_fluoranthene in pm10 (mass_concentration_of_benzo_b_fluoranthene_in_pm10_in_air), dibenzo_ac_ah_anthracenes in pm10 (mass_concentration_of_dibenzo_ac_ah_anthracenes_in_pm10_in_air)