239-240 Pu ACTIVITY (log d/m/g) SOIL DEPTH (cm) 92 2 | 3 | 4 1 5 lO ® DOUBLE TRACKS STR-5, STA-I3 = AREA II-D STR-4, STA-I IS 20 25 Fio. 3. Distribution of plutonium in top 25 cm of soil. —
239-240 Pu ACTIVITY (log d/m/g) SOIL DEPTH (cm) 92 2 | 3 | 4 1 5 lO ® DOUBLE TRACKS STR-5, STA-I3 = AREA II-D STR-4, STA-I IS 20 25 Fio. 3. Distribution of plutonium in top 25 cm of soil. —