Ground based in situ observations of filter_2pack at Lista (NO0099R). 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: chromium in pm10_pm25 (mass_concentration_of_chromium_in_pm10_minus_pm2p5_in_air), cobalt in pm10_pm25 (mass_concentration_of_cobalt_in_pm10_minus_pm2p5_in_air), cobalt in pm25 (mass_concentration_of_cobalt_in_pm2p5_in_air), copper in pm10_pm25 (mass_concentration_of_copper_in_pm10_minus_pm2p5_in_air), lead in pm10_pm25 (mass_concentration_of_lead_in_pm10_minus_pm2p5_in_air), nickel in pm10_pm25 (mass_concentration_of_nickel_in_pm10_minus_pm2p5_in_air), vanadium in pm10_pm25 (mass_concentration_of_vanadium_in_pm10_minus_pm2p5_in_air), zinc in pm10_pm25 (mass_concentration_of_zinc_in_pm10_minus_pm2p5_in_air)