This deliverable outlines the procedures, processes and timelines for the second round of the ACTION open call. This call solicited applications from citizen science projects in the domain of pollution, which were evaluated by a panel of experts made up of external reviewers and the ACTION consortium. In this document, we further outline key aggregate statistics concerning pollution focus, country of origin and the evaluation outcomes of these applications, as well as the relationship with applicants through email correspondence and webinars. We conclude with lessons learned and recommendations for open calls in general.