No reason to deactivate thymidine - the bacteria in the treatment plant will take care of it just fine. James J. Thompson, Ph.D. ------------------------------------ jjthompson@rso.utah.edu | Radiological Health Department | (801) 581-6141 (office) | University of Utah | (801) 581-4206 (FAX) | 100 Orson Spencer Hall | | Salt Lake City, UT 84112 | ------------------------------------