36. The Chair of the IWG on Particle Measurement Programme (PMP) presented a status report on the activities of the group on exhaust and non-exhaust particle emissions (GRPE-76-33). He reported on the ongoing activities: (a) the Round Robin tests scheduled to evaluate the robustness of exhaust particles determination with a size below 23 down to 10 nanometre, (b) the Particulate Number counting from Raw Exhaust via Fixed dilution, (c) the Round Robin Test activities on Particle Number Counter, (d) The Horizon 2020 Projects monitoring, (e) the particle emissions from gas engines and (f) the WLTP low temperature PN testing. On non-exhaust particle emissions: he reported on brake wear particles measurement (braking test cycle reflecting real-world conditions) and the corresponding validation activities of the rig test method that were being developed.

37. GRPE acknowledged the progress made by the IWG on PMP and noted that the group had no request for a meeting room during the GRPE week in June 2018.