ra
Pree
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r
BACKGROUND ACTIVITY
|
I
rea
104
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© 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
SAMPLE NUMBER
Pig. C.17
Example of Relative Background Activity,
Station 251.09 (sempler exnosed but did
nut operate)
B2