Atmospheric Moisture Sampling
Eleven samples exceeded their respective 2s values, one from Rexburg, two from Blackfoot, three from Atomic City, and five from Idaho Falls. Five sample results (one from Atomic City, four from Idaho Falls) are questionable due to small sample size (less than 9 mL). All sample results were well below the DOE DCG for tritium in air of 1 x 10-7 mCi/mL (3.7 x 10-3 Bq/mL). The maximum value was 6.6 x 10-12 mCi/mL of air (2.6 x 10-7 Bq/mL of air). (Table C-4, Appendix C)
Results are found in Table C-4. |
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Twenty-one atmospheric moisture samples collected using
silica gel were obtained during the third quarter of 2002. Samples were
divided as follows: two samples from Rexburg, four samples from
Blackfoot, six samples from Atomic City, and nine samples from Idaho
Falls. Atmospheric moisture is collected by pulling air through a column
of absorbent material (i.e., silica gel) to absorb water vapor. The
water is then extracted from the absorbent material by heat
distillation. The resulting water samples are then analyzed for tritium
using liquid scintillation.