Quintessa and its sub-contractors Geofirma Engineering and SENES Consultants have recently completed a preliminary postclosure assessment of the DGR conceptual design for NWMO (see below). A suite of eight technical reports has been produced. They include the Version 1 Postclosure Safety Assessment Report, which provides an overview of the work that has been undertaken. This study will form the basis of the next version of the postclosure safety assessment that will support the final Environmental Impact Statement and Preliminary Safety Report. Details of the DGR project are given on the OPG website.