The compilation of an Updated National Inventory of POPs is a difficult task in the Cambodia. In view of the uncertainties generated by the different factors and in view of the need to complement the quantitative data with qualitative information, a conceptual approach was chosen for the compilation of the inventory based on three data collection methods:  On site investigation of POPs management and management of other chemicals with interviewing the relevant persons and the members of the NCC which it established for chemical management (NCC-Steering Committee on Technical Working Group)  Conduct training and seminars in POPs Inventory with representatives of the UNEP’s. POPs inventory Report 2020 Page - 2-  Collection of information by field survey.