I wish to thank those who responded to my request. We now have enough information to make our decision. Thanks again! andy ___________________________________ Andrew Astleford Environmental Health & Safety Radiation Protection Division University of Minnesota (612) 626-6940 FAX: (612) 625-1608 astle001@maroon.tc.umn.edu "Shlala gashle" (Zulu greeting, meaning "Stay safe") "Standard Disclaimer"