This webinar addresses the principles for the development of environmental monitoring and aftercare programs and the different types of monitoring that should be implemented before, during, and after remediation. It also deals with measurement parameters and measurement intervals, sampling and lab methods, the infrastructure needed for implementation of complex monitoring programs, the different roles of operators and regulators, QA/QC, and so forth. Data management, record keeping, reporting, and communication of monitoring results with stakeholders are also be discussed. Practical experience is provided on the basis of case studies, namely monitoring within the WISMUT Remediation Project and monitoring at uranium legacy sites in Central Asia.IAEA Network of Environmental Management and Remediation -?ENVIRONET