The procedures described in this document are intended to provide instructions regarding the collection of environmental samples to be analyzed for radiological contaminants following a contamination event or emergency. This document focuses on the site Characterization, Remediation, and Final Status phases of a contamination event and is not intended to address the sample collection needs during Initial Response. The procedures are intended for collection of environmental samples in response to a contamination event or an emergency at the point where Federal Radiological Monitoring and Assessment Center (FRMAC) activities are turned over to the U.S. Environmental Protection Agency (EPA). The procedures describe sample collection only and are intended for use by sampling personnel who have been sufficiently trained in radiological sampling techniques and corresponding radiation safety. It is also assumed that an initial site assessment has been performed prior to implementation of these procedures.