Study for the development of an evidence-based approach as support to regulators when assessing how to manage the presence of substances of concern in recycled materials -Proposal CleaR –, November 2017 proposed by the Dutch National Institute for Public Health and the Environment (RIVMRijksinstituut voor Volksgezondheid en Milieu) and Ramboll Environment & Health GmbHGesellschaft mit beschränkter Haftung (former BiPRO).