Would a 5 microcurie Thorium check source require any special shipping procedures within the USA? Would it need a "White I" label? Would it need to go "ground only"? Thanks. Syd H. Levine AnaLog Services, Inc. Phone: (270) 276-5671 Telefax: (270) 276-5588 E-mail: analog at logwell.com Web URL: www.logwell.com