Air Concentration Summaries from

Environmental Surveillance Reports

TA-49

------------------------------------------------------

Calendar
Total Air
Total #
# Samples
Air Concentrations

Year
Volume (m3)
Samples
< MDA
------------------------------------------------------

Min
Max
Mean Std.Dev. Units

====================================================================================================

Am-241

1975 2
1
2
aCi/m3

1977 92102
4
4
-1.6
2.7
0
3.7
aCi/m3

1978 73746
3
3
-2.7
2.4
0
5.4
aCi/m3

1979 84773
4
4
-1.8
1.8
-0.4
3.5
aCi/m3

1980 92914
4
3
-1.7
6.7
2.2
3.5
aCi/m3

1981 52769
4
4
0
2.3
0.9
2.2
aCi/m3

1982 86005
4
4
-1.4
0.9
0
0.5
aCi/m3

1987 77741
4
4
0.4
2.5
1.2
0.9
aCi/m3

1988 61037
3
2
0.8
17.6
6.6
9.5
aCi/m3

1990 41927
2
2
1.7
1.8
1.7
aCi/m3

1991 101596
4
4
0.6
1.6
1.1
0.6
aCi/m3

1992 35544
2
2
0
0
0.5
aCi/m3

1993 38500
3
2
0.8
2.2
1.5
1.4
aCi/m3

1994 59000
4
2
0.7
12.3
4.6
10.7
aCi/m3

1995 4
1
0
5.1
3.4
4.7
aCi/m3

1996 4
1
1.4
12.1
4.8
5
aCi/m3

1997 4
3
0.4
4.2
1.9
1.6
aCi/m3

1998 4
4
1.2
4
2.7
1.3
aCi/m3

1999 4
4
0.9
5.5
3
2
aCi/m3

2000 4
4
-0.9
1.5
0.4
1.2
aCi/m3

=====================================================================================================

Tuesday, December 24, 2002 Page 2 of 10
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