Document 8RXv4vJdyaJO0pg2Dka6QG9zB
ft(L &cL6 _ 31f.6
000648
t
HALF LIFE RESULTS FROM PENSIOHEBS
C8 DATE PPM 4/89 5.7 3/87 1.2 9/81 6.5 3/88 2.8 8/84 2.4 7/84 5.9 3/85 3,0 9/82 6.3 3/88 1-7
BET. DATE 4/91 6/92 4/85 12/92 4/85 12/81 4/85 12/82 12/93
C8 DATE PPM 3/95 4.3 3/95 1.1 3/95 1.1 3/95 2.2 3/95 .72 3/95 .94 3/95 .14 3/95 .57 3/95 2.4
**
1/2 LIFE flEARSi
9.7 22
3.9 6.5 5.7*
2,3* 3.5*
For * results,
n-4
average * 3.9
sigma = 1.4
using
log n --.301 t no tl/2
)
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