100 METERS bio “ye 20 10 90 70 140 70 120 50 70 120 170 159), 70 3 50 ; 8 4 . Fig. B.1.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter,
100 METERS bio “ye 20 10 90 70 140 70 120 50 70 120 170 159), 70 3 50 ; 8 4 . Fig. B.1.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter,