This report is the second of two final reports, prepared for Project-90, on the oxidation state of the near-field environment within the CALIBRE source-term model. It contains discussions of a number of issues which complement the final technical report on the code used to calculate the progress of the redox front. It has proven difficult to reach a conclusive view about the effective oxidation state of the fracture. In this document scooping calculations on the condition of fracture groundwater are reported. These try to assess the overall likely chemical state. Secondly, this report presents the final redox base case definitions and results, which were carried out with a zero concentration fracture boundary condition. (au).