U.S. Arms Control and Disarmament Agency, Attn: ACDA/A/CON, 320 21st St.,NW, Washington, DC 20451

B -- GLOBAL NETWORKS OF STATIONS FOR SEISMIC, HYRO ACOUSTIC, INFRA-SOUND, AND RADIONUCLIDE SOL NA DUE 070897 POC Dr. Joachim Schulze, Vienna International Centre, (43) 1-21-345-6110 E-MAIL: jschulze@ctbto.un.or.at, jschulze@ctbto.un.or.at. The U.S. Arms Control and Disarmament Agency has been notified that the Provisional Technical Secretariat (PTS) of the Preparatory Commission for the Comprehensive Nuclear Test-Ban Treaty Organization is seek to know if qualified and experienced governmental organizations, scientific institutions, or private industries are interested in potential contractual arrangements to conduct technical site surveys in the United States and other locations around the world. The Comprehensive Nuclear Test-Ban Treaty requires an International Monitoring System (IMS) to detect and locate possible nuclear explosions. The IMS will comprise four global networks of stations that will employ sensors in these technologies: seismic, hydro acoustic, infra-sound, and radionuclide. Some stations already exist, but many need to be established, especially those located on the earth's surface and employing infra-sound or radionuclide sensors. Technical site surveys will be needed for each type of sensor. It is expected that technical guidelines for the conduct of these surveys will soon be prepared by the PTS. For now, the PTS seeks to know what interest exists in conducting site surveys, but does not require extensive responses. The PTS has specifically inquired "whether any governmental organization, scientific institution or private industry... would be interested in entering into a contractual arrangement to conduct sited survey: 1. in (the United States) or 2. at any location required around the world." Interested parties should submit brief statements of their interest and qualifications for conducting site surveys for stations employing sensors in the specific technologies noted above. These should be sent directly to: Dr. Joachim Schulze, Provisional Technical Secretariat, Vienna International Centre, P.O. Box 1200, A-1400 Vienna, Austria; Telephone No.: (43)1-21-345-6110; FAX: (43)1-21-345-5950; E-Mail: jschulze@ctbto.un.or.at. It is suggested that statements be provided by FAX or E-Mail not later than July 8, 1997. (0174)

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