. bt 33 32 7 7 30 \y /- 29 / 41° \ \ “a 24 23 % 22 N 25 ™~s 26 e 28 a” TRAY ACTIVITY (C/M x104) 3) \ IN 7 / NI Pee cane l|4 20 160 180 200 220 240 260 280 300 320 340 0 20 40 DEGREES FROM TRUE NORTH Fig. 8 60 80 100 120 140 160 Interpolated Fallout Collection Curve, HOW-D 15