Air Concentration Summaries from

Environmental Surveillance Reports

Crossroads Bible Church (formerly Trinity Bible Church)

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

Calendar
Total Air
Total #
# Samples
Air Concentrations

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

Min
Max
Mean Std.Dev. Units

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

Alpha

1995 14
1
5.5
2.2
2.9
fCi/m3

1996 25
0.3
1.8
0.8
0.6
fCi/m3

1997 27
2
0.13
1.04
0.5
0.2
fCi/m3

1998 24
2
0.14
1.37
0.67
0.31
fCi/m3

1999 26
0
0.28
1.91
0.87
0.44
fCi/m3

2000 26
0
0.49
3.56
1.13
0.62
fCi/m3

Am-241

1995 2
4.6
4.7
4.7
aCi/m3

1996 4
2
0.5
2.2
1.3
0.8
aCi/m3

1997 4
4
0.8
1.9
1.3
0.5
aCi/m3

1998 4
4
1.8
3.6
2.8
0.9
aCi/m3

1999 4
4
1.2
3.6
2
1.1
aCi/m3

2000 4
4
-0.1
3.1
1.3
1.4
aCi/m3

Beta

1995 14
9.2
25.3
17.6
9.9
fCi/m3

1996 25
4
19.9
10.8
6.6
fCi/m3

1997 27
6.7
18.2
13.2
2.9
fCi/m3

1998 24
0
8.8
19.4
12.5
3
fCi/m3

1999 26
0
7.3
21.5
13
3.9
fCi/m3

2000 26
0
7.7
19.8
12.7
2.7
fCi/m3

H-3

1995 13
7
0
5.4
1.8
2.9
pCi/m3

1996 26
11
-0.3
12.4
1.6
5.3
pCi/m3

1997 27
6
-0.2
5.6
2
1.3
pCi/m3

1998 25
7
0.5
49.8
4.1
9.6
pCi/m3

1999 26
6
-0.4
6.5
2
1.6
pCi/m3

2000 26
10
0.1
16.4
2.8
3
pCi/m3

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

Tuesday, December 24, 2002 Page 1 of 3
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