Perimeter Air Sampler 6 (Northeast of Building 90 at Fence)
Uranium-238 Alpha Spectroscopy Monthly Results
Action limit for uranium-238 is 1.00E-12 µCi/ml (10 CFR 20 Appendix B Table 2).
Pre-operational average uranium-238 baseline activity concentration is 8.0E-17 µCi/ml.
Month	Hours	Lab Qualifier	Activity Concentration ± Uncertainty (µCi/mL)
Jan-09	1010		3.2E-17	±	1.5E-17
Feb-09	675		2.5E-17	±	1.7E-17
Mar-09	667		5.3E-17	±	2.6E-17
Apr-09	676		5.9E-17	±	1.3E-17
May-09	842		3.8E-17	±	2.0E-17
Jun-09	669		3.6E-17	±	2.2E-17
Jul-09	841		4.7E-17	±	1.2E-17
Aug-09	648		4.3E-17	±	1.0E-17
Sep-09	676		3.4E-17	±	2.0E-17
Oct-09	837		4.5E-17	±	2.0E-17
Nov-09	672		6.1E-17	±	2.8E-17
Dec-09	673		2.9E-17	±	1.8E-17
Lab Qualifier Flags
NR	No data reported for this radionuclide due to laboratory error or data found unacceptable during review
J	Nuclide identified, the associated numerical value is approximated
U	Nuclide not detected above the reported MDC or 2 sigma counting uncertainty
0.00E+00	Not detected in spectra
NA	Data not available at this time