| 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 |