[en] Suomen Malmi Oy with the co-operation of Astrock Oy conducted the mise-a-lamasse surveys, the optical imaging and the resistivity borehole logging of the edz-boreholes ONK-PP12 - ONK-PP57 at the Olkiluoto site in Eurajoki during March 2006. The survey is a part of Posiva Oy's detailed investigation program for the final disposal of spent nuclear fuel. The assignment included the field work, processing of the optical data and the processing and the interperation of the mise-a-la-masse surveys. The report describes the field operation, equipment as well as processing procedures and shows the obtained results and their quality in the appendices. The raw and processed data are delivered digitally in WellCAD- and pdf-format. (orig.)