Ground based in situ observations of steel_canister at Waldhof (DE0002R). 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: ethyne in air (mass_fraction_of_ethyne_in_air), n-pentane in air (mass_fraction_of_pentane_in_air), toluene in air (mass_fraction_of_toluene_in_air)