REDUCTION OF RADIOISOTOPES BY
REMOVAL OF SURFACE* SOIL
SR—90

ISLAND

% OF ISLAND
CLEANED

IRENE
JANET
PEARL
SALLY

3
13
44
4.5

* TOP 15 cm.

SR-90 pCi/g
|
PREPOST
47
69
28
12

31
32
11
4

eee aNGE
IN CONC.
-33
-54
" -61
-67

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