-23- AECD-3446 Bsczerome for the counting period was increased by 6 c/m for a 20sample count and by 5 c/m for a 30-minute sample count. Because the ind varied considerably even during periods when the counter was constantly -- ound values were calculated only to the nearest whole count per Pe ekground, Activity of less than 5 m pc/kg was not considered significantly Lib ede ONLY. Or Wy ake | bet?