<p><p><strong>References:<br></strong><em>Schaefer et al. (2016)<br>Holtz (1987)</em></p><p><strong>Method Summary</strong></p><p>Records should be kept of equipment inspections, PVD material quality, PVD dimensions (width and thickness), mandrel dimensions, mandrel type, PVD installation depth, spacing, PVD location, verticality of installed PVDs, drainage blanket material and placement conditions, and fill material and placement in order to verify adherence to design. Any splicing of drains should be recorded.</p><p><strong>Accuracy and Precision</strong></p><p>Confirming the quality of the materials and construction processes is a straightforward and highly precise process. The values should be highly accurate, precisely representing the PVD and preload construction methods and consolidation process as it happens in the field.</p><p><strong>Adequacy of Coverage</strong></p><p>These records should be kept for every PVD installed and for every preload lift placed. The records maintained post-installation should provide more representative values. For materials arriving in mass quantities, typically representative inspections are performed.</p><p><strong>Implementation Requirements </strong></p><p>Keeping records is a simple and necessary process.</p><p><strong>General Comments </strong></p><p>Once materials are installed, they can be difficult to monitor. For this reason, inspecting project materials before they are installed is a critical step of ensuring a successful implementation of PVDs and preloading. PVDs should have a continuous core and filter jacket. The materials should not be used if they are damaged.</p></p>