All excess Federal Government equipment available through HDER has been renovated and is available to first-responder agencies across the Nation at no charge. In addition, mobile teams from the Department of Homeland Security's Office for Domestic Preparedness (ODP) offer onsite equipment and maintenance training, along with technical information. Volunteers from local chapters of the Health Physics Society, which promotes radiation safety, can perform field checks and basic maintenance, provide refresher training, and answer questions. Available equipment includes handheld dose rate meters (ionization chambers); electronic pulsers; microrem meters; count rate meters for contamination surveys; instrument probes (alpha and gamma scintillation and Geiger Mueller probes); and pocket ionization chambers (self-reading pocket dosimeters).