‘ 10 16 2 0 60 40 f 50 40 150 140 12 ° ! 21 705 603,00 . 22 : - 405070 >* 4 - 10 50 22 50° "6 ~} * 90 Pe 7O ‘ or 15 Roan 6, 8 , “ 1O 6 ll , - 5 Jobe 43) . 10 ; + 17 10 « r ‘ i lett * or . P os “ . ; My * . os ” : } j , . 14 75 21 3 . 26 15 2 7 “ y i 24 8 oy : S 70 50 9 6519 65 : . nN . aa> 25 ek 2 er 35 , ory 5 90 9035 2327 35 60 80 a "3 50 18 . 28 ? 35° BOs ° 50° 30, e! 60 Se , we 40 30 60 9 60 65 . 404050 . a oS,” 40,4040 15 60 60 65 4, 70 30° 3030 29530 20 0 60 ° 30 ieUR entane , 118 15 «© 30 22. om 100 13 15’ 24 20 . ?: . 4 e , Fig. B.8.1.d. The gamma background exposure rate (uR/hr) at 1 m above the ground, measured with a portable Nal scintillation counter. . ta ‘ . wu