Nuria Catalan (Uppsala University) was hosted by Rafa Marce at the Catalan Institute of Water Research, ICRA, Girona, Catalonia, Spain. 

The main purpose of this STSM was the treatment of data obtained previously during different degradation experiments performed by the applicant and the host group, and develop the outline of two scientific publications from this data. Furthermore, an additional objective was to define cooperation activities in the framework of WG4 during 2015, particularly the on-going activities related to DOM and THMs.