This report investigates the applicability of the probabilistic methods for the assessment human exposure within the REACH. The objectives of the project were to introduce the principles of probabilistic exposure assessment and to investigate the applicability and possibilities to use probabilistic methods in human exposure assessments in REACH context. The report and conclusions made were based on a real exposure study. Report was presented in the Nordic Workshop on Human Exposure Assessment Methods in REACH and Biocide Contexts, on 9th - 10th of May 2007 in Oslo. Nature of this report is an eye opener which provides basis for further discussions. The report cannot consider being as a guidance which describes how to make a probabilistic exposure assessment. The project was funded by the Nordic Council of Ministries through the Nordic Chemicals Group. The project was launched and coordinated by the Nordic Exposure Group under the Nordic Chemicals Group.