Scientific Investigations Report 2006–5232

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5232

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Table 1. Radionuclide concentrations and gross radioactivity measurements, and associated estimated standard deviations after purging 1 and 3 borehole volumes of water from selected wells during 2004 and 2005, with statistical comparisons of analytical results, Idaho National Laboratory, Idaho.

[See figures 1 and 2 for location of wells. Analytical results and estimated standard deviations are in picocuries per liter. Shading indicates not statistically comparable at the 95-percent confidence level. Z-value, calculated using equation 1 (a Z-value less than or equal to 1.96 indicates statistical equivalence at the 95-percent confidence level). Abbreviations: BHV, borehole volume; CFA, Central Facilities Area; NA, not applicable; NS, not sampled; Repl., replicate sample; SD, estimated standard deviation reported as 1 sigma; USGS, U.S. Geological Survey]

Well identifier Sample
date		 Radionuclide concentrations
Tritium   Strontium-90
1-BHV SD 3-BHV SD Z-value 1-BHV SD 3-BHV SD Z-value
Area 2 10-05-04 -110 120 0 130 0.62 0.2 0.6 1.0 0.6 0.94
IET DISP 10-09-04 -80 120 -40 130 .23 -.2 .7 .4 .7 .61
Site 14 10-12-04 -130 120 -120 120 .06 NS NS NS NS NA
Site 19 10-04-04 -110 120 -100 120 .06 NS NS NS NS NA
TRA DISP 10-07-04 4,200 300 3,900 300 .71 -.4 .7 4.1 .9 3.95
USGS 4 10-14-04 -80 120 -60 120 .12 NS NS NS NS NA
USGS 15 10-12-04 -70 120 -30 130 .23 1.2 .6 1.4 .6 .24
WS INEL 1 10-27-04 -60 120 -80 120 .12 NS NS NS NS NA
Arbor Test 04-25-05 -90 50 -10 60 1.02 NS NS NS NS NA
CFA LF 2-10 04-12-05 3,060 160 2,880 160 .80 .5 .7 .1 .8 .38
No Name 1 04-11-05 -80 50 -70 50 .14 .1 .7 1.9 .7 1.82
Site 9 04-28-05 0 60 -40 50 .51 -1.2 .6 -1.1 .6 .12
Site 17 04-27-05 -20 50 -40 50 .28 -.8 .6 -4.2 1.5 2.10
USGS 12 04-21-05 30 60 -70 50 1.28 NS NS NS NS NA
USGS 22 04-25-05 50 60 30 60 .24 NS NS NS NS NA
USGS 22, 3-BHV, Repl. 04-25-05 NS NS 0 60 .35 NS NS NS NS NA
USGS 103 04-18-05 -70 50 20 60 1.15 NS NS NS NS NA
USGS 119 03-31-05 -80 50 -50 50 .42 .6 .7 .5 .7 .10
Well identifier Sample
date		 Radionuclide concentrations
Cesium-137   Americium-241
1-BHV SD 3-BHV SD Z-value 1-BHV SD 3-BHV SD Z-value
Area 2 10-05-04 NS NS NS NS NA NS NS NS NS NA
IET DISP 10-09-04 NS NS NS NS NA NS NS NS NS NA
Site 14 10-12-04 -20 20 11.9 22.1 1.07 NS NS NS NS NA
Site 19 10-04-04 NS NS NS NS NA NS NS NS NS NA
TRA DISP 10-07-04 -14.5 37 -30 40 .28 NS NS NS NS NA
USGS 4 10-14-04 -12.1 33.2 0 20 .31 NS NS NS NS NA
USGS 15 10-12-04 NS NS NS NS NA NS NS NS NS NA
WS INEL 1 10-27-04 NS NS NS NS NA NS NS NS NS NA
Arbor Test 04-25-05 NS NS NS NS NA NS NS NS NS NA
CFA LF 2-10 04-12-05 0 30 40 30 .94 NS NS NS NS NA
No Name 1 04-11-05 40 30 50 40 .20 NS NS NS NS NA
Site 9 04-28-05 NS NS NS NS NA NS NS NS NS NA
Site 17 04-27-05 NS NS NS NS NA NS NS NS NS NA
USGS 12 04-21-05 -20 20 20 20 1.41 NS NS NS NS NA
USGS 22 04-25-05 NS NS NS NS NA NS NS NS NS NA
USGS 103 04-18-05 -15.4 22 -20 40 .10 NS NS NS NS NA
USGS 119 03-31-05 0 40 40 20 .89 0.006 0.009 0.003 0.008 0.25
Well identifier Sample
date		 Radionuclide concentrations
Plutonium-238   Plutonium-239, -240
1-BHV SD 3-BHV SD Z-value 1-BHV SD 3-BHV SD Z-value
Area 2 10-05-04 NS NS NS NS NA NS NS NS NS NA
IET DISP 10-09-04 NS NS NS NS NA NS NS NS NS NA
Site 14 10-12-04 NS NS NS NS NA NS NS NS NS NA
Site 19 10-04-04 NS NS NS NS NA NS NS NS NS NA
TRA DISP 10-07-04 NS NS NS NS NA NS NS NS NS NA
USGS 4 10-14-04 NS NS NS NS NA NS NS NS NS NA
USGS 15 10-12-04 NS NS NS NS NA NS NS NS NS NA
WS INEL 1 10-27-04 NS NS NS NS NA NS NS NS NS NA
Arbor Test 04-25-05 NS NS NS NS NA NS NS NS NS NA
CFA LF 2-10 04-12-05 NS NS NS NS NA NS NS NS NS NA
No Name 1 04-11-05 NS NS NS NS NA NS NS NS NS NA
Site 9 04-28-05 NS NS NS NS NA NS NS NS NS NA
Site 17 04-27-05 NS NS NS NS NA NS NS NS NS NA
USGS 12 04-21-05 NS NS NS NS NA NS NS NS NS NA
USGS 22 04-25-05 NS NS NS NS NA NS NS NS NS NA
USGS 103 04-18-05 NS NS NS NS NA NS NS NS NS NA
USGS 119 03-31-05 0.003 0.005 0.003 0.006 0 0.006 0.006 0.003 0.006 0.35
Well identifier Sample
date		 Gross radioactivity measurements
Alpha   Beta
1-BHV SD 3-BHV SD Z-value 1-BHV SD 3-BHV SD Z-value
Area 2 10-05-04 NS NS NS NS NA NS NS NS NS NA
IET DISP 10-09-04 NS NS NS NS NA NS NS NS NS NA
Site 14 10-12-04 0.3 0.6 1.0 0.8 0.70 1.09 2.15 4 2 0.99
Site 19 10-04-04 NS NS NS NS NA NS NS NS NS NA
TRA DISP 10-07-04 NS NS NS NS NA NS NS NS NS NA
USGS 4 10-14-04 .7 .7 .7 .7 0 5 2 5 2 0
USGS 15 10-12-04 NS NS NS NS NA NS NS NS NS NA
WS INEL 1 10-27-04 NS NS NS NS NA NS NS NS NS NA
Arbor Test 04-25-05 NS NS NS NS NA NS NS NS NS NA
CFA LF 2-10 04-12-05 .0 .6 .0 .6 0 3 2 3 2 0
No Name 1 04-11-05 .0 .6 .0 .6 0 1 2 5 2 1.41
Site 9 04-28-05 NS NS NS NS NA NS NS NS NS NA
Site 17 04-27-05 NS NS NS NS NA NS NS NS NS NA
USGS 12 04-21-05 .3 .6 .3 .6 0 -1 2 1 2 .71
USGS 22 04-25-05 NS NS NS NS NA NS NS NS NS NA
USGS 103 04-18-05 .3 .6 .3 .6 0 1.44 2.26 3 2 .52
USGS 119 03-31-05 NS NS NS NS NA NS NS NS NS NA

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