Air Concentration Summaries from

Environmental Surveillance Reports

TA-2 Omega Site

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

Calendar
Total Air
Total #
# Samples
Air Concentrations

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

Min
Max
Mean Std.Dev. Units

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

Pu-238

1990 83709
4
4
0.2
1.1
0.8
0.4
aCi/m3

1992 42788
4
4
-0.5
1
0
6.2
aCi/m3

1993 41200
3
3
0.3
2.4
1
2.3
aCi/m3

1994 56800
4
4
-0.9
1.3
0.2
1.8
aCi/m3

1995 3
3
1.6
3.1
2.2
1.6
aCi/m3

2000 2
2
-0.2
0.9
0.3
0.7
aCi/m3

Pu-239

1987 89097
4
3
0.2
3.2
1
1.5
aCi/m3

1988 66917
4
2
1.2
81.7
22.7
39.4
aCi/m3

1989 60178
4
3
1.2
2.6
2.2
0.6
aCi/m3

1990 83709
4
4
0.2
0.9
0.5
0.3
aCi/m3

1991 71968
4
4
-0.3
1.5
0.5
0.8
aCi/m3

1992 42788
4
4
-0.1
2.6
1.5
8.1
aCi/m3

1993 41200
3
2
0
15.9
5.4
18.2
aCi/m3

1994 56800
4
2
0.5
5.9
2.9
4.5
aCi/m3

1995 3
2
0.6
9.4
4
9.4
aCi/m3

2000 2
2
0
2.4
1.2
1.7
aCi/m3

U

1987 89097
4
23.1
56.4
34.1
15.3
pg/m3

1988 66917
4
33.6
59.8
46
10.8
pg/m3

1989 60178
4
29.4
108.5
64.4
39.2
pg/m3

1990 83709
4
15.6
40.2
23.6
11.4
pg/m3

1991 71968
4
25.5
67.8
48.1
4.8
pg/m3

1992 42788
4
46.9
107.2
63.2
25.7
pg/m3

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

Tuesday, December 24, 2002 Page 2 of 3
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