Abstract: For various reasons, sites may either: i) become a candidate site but fail to establish a stable data flow that is required for certification; or ii) be certified but cease operations. This document describes the GRUAN policy for dealing with such silent sites, while working with the site to attempt to resume operations. The policy consists of a series of escalating steps, ranging from monthly email reminders to, eventually, removal of the site from GRUAN if it proves impossible to resolve the issues. At all stages in the process the main objective is to resume the site’s active participation within GRUAN.
