[en] Suomen Malmi Oy carried out mise-a-la-masse measurements at Olkiluoto site in Eurajoki during November and December 2007 as well as January, February and March 2008. The survey consisted of measurements in 10 drillholes and on 27 surface profiles. 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 and the data processing. This report describes the field operation, the equipment as well as the processing procedures and shows the obtained results and their quality. The raw and processed data are delivered digitally in Microsoft Ecxel and PDF format. (orig.)