Scientific Investigations Report 2006–5232
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5232
Table 4. Tritium and strontium-90 concentrations, and associated estimated standard deviations after purging 1, 2, and 3 borehole volumes of water from selected wells during 1991, 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. Sample pairs from Bartholomay (1993, table 3); Abbreviations: BHV, borehole volume; SD, estimated standard deviation reported as 1-sigma; USGS, U.S. Geological Survey; Z, 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)]
Well identifier | Sample date |
Tritium concentrations | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1-BHV | SD | 2-BHV | SD | 3-BHV | SD | Sample pairs | |||||||||
Z 1-3 BHV | Z 1-2 BHV | Z 2-3 BHV | |||||||||||||
Site 9 | 04-09-91 | 10 | 160 | -110 | 160 | 50 | 160 | 0.18 | 0.53 | 0.71 | |||||
09-27-91 | 10 | 170 | 10 | 170 | -50 | 170 | .25 | 0 | .25 | ||||||
Site 14 | 04-24-91 | 50 | 160 | 170 | 170 | -20 | 160 | .31 | .51 | .81 | |||||
10-18-91 | 0 | 200 | 100 | 200 | -30 | 170 | .11 | .35 | .50 | ||||||
Site 19 | 04-02-91 | 110 | 160 | -40 | 160 | -50 | 160 | .71 | .66 | .04 | |||||
10-22-91 | 10 | 170 | 0 | 200 | 10 | 170 | 0 | .04 | .04 | ||||||
TRA DISP | 10-30-91 | 7,700 | 400 | 7,300 | 400 | 6,900 | 300 | 1.60 | .71 | .80 | |||||
USGS 38 | 04-22-91 | 28,600 | 700 | 28,600 | 700 | 27,600 | 700 | 1.01 | 0 | 1.01 | |||||
10-03-91 | 25,600 | 700 | 25,700 | 700 | 26,300 | 700 | .71 | .10 | .61 | ||||||
USGS 59 | 04-04-91 | 5,300 | 300 | 6,300 | 300 | 4,900 | 300 | .94 | 2.36 | 3.30 | |||||
10-21-91 | 19,100 | 600 | 18,900 | 600 | 19,300 | 600 | .24 | .24 | .47 | ||||||
USGS 82 | 03-27-91 | 1,100 | 200 | 1,200 | 200 | 1100 | 200 | 0 | .35 | .35 | |||||
10-23-91 | 150 | 170 | 150 | 170 | 100 | 200 | .19 | 0 | .19 | ||||||
USGS 83 | 03-25-91 | -50 | 160 | -50 | 160 | 20 | 160 | .31 | 0 | .31 | |||||
10-01-91 | 100 | 200 | -80 | 170 | 0 | 200 | .35 | .69 | .30 | ||||||
USGS 107 | 04-22-91 | 110 | 160 | 60 | 160 | -70 | 160 | .80 | .22 | .57 | |||||
09-30-91 | 100 | 200 | -80 | 170 | 0 | 170 | .38 | .69 | .33 | ||||||
USGS 110 | 03-26-91 | 210 | 170 | -170 | 150 | 20 | 160 | .81 | 1.68 | .87 | |||||
10-07-91 | -150 | 160 | 100 | 200 | -30 | 170 | .51 | .98 | .50 | ||||||
USGS 119 | 04-19-91 | 70 | 160 | 150 | 170 | 0 | 160 | .31 | .34 | .64 | |||||
10-15-91 | 150 | 170 | -130 | 160 | -140 | 160 | 1.24 | 1.20 | .04 | ||||||
Well identifier | Sample date |
Strontium-90 concentrations | |||||||||||||
1-BHV | SD | 2-BHV | SD | 3-BHV | SD | Sample pairs | |||||||||
Z 1-3 BHV | Z 1-2 BHV | Z 2-3 BHV | |||||||||||||
Site 9 | 04-09-91 | -0.2 | 1.5 | 0.7 | 1.6 | -0.8 | 1.5 | 0.28 | 0.41 | 0.68 | |||||
09-27-91 | -5.0 | 2.0 | -6.0 | 2.0 | -6.0 | 2.0 | .35 | .35 | 0 | ||||||
Site 14 | 04-24-91 | -1.6 | 1.8 | 0 | 2.0 | 0 | 2.0 | .59 | .59 | 0 | |||||
10-18-91 | 0 | 2.0 | 1.0 | 2.0 | 1.3 | 2.4 | .42 | .35 | .10 | ||||||
Site 19 | 04-02-91 | 1.7 | 2.0 | 3.0 | 2.0 | 1.1 | 1.9 | .22 | .46 | .69 | |||||
10-22-91 | 0 | 2.0 | 4.0 | 2.0 | -1.3 | 2.3 | .43 | 1.41 | 1.74 | ||||||
TRA DISP | 10-30-91 | -.9 | 1.7 | .8 | 1.6 | -0.4 | 1.5 | .22 | .73 | .55 | |||||
USGS 38 | 04-22-91 | 26.0 | 3.0 | 28.0 | 3.0 | 29.0 | 3.0 | .71 | .47 | .24 | |||||
10-03-91 | 23.0 | 3.0 | 27.0 | 5.0 | 9.0 | 3.0 | 3.30 | .69 | 3.09 | ||||||
USGS 59 | 04-04-91 | 13.0 | 3.0 | 16.0 | 3.0 | 13.0 | 3.0 | 0 | .71 | .71 | |||||
10-21-91 | 18.0 | 3.0 | 17.0 | 3.0 | 14.0 | 2.0 | 1.11 | .24 | .83 | ||||||
USGS 82 | 03-27-91 | -3.1 | 1.7 | 0 | 2.0 | 8.0 | 2.0 | 4.23 | 1.18 | 2.83 | |||||
10-23-91 | -1.0 | 2.0 | -1.2 | 2.1 | -2.0 | 2.0 | .35 | .07 | .28 | ||||||
USGS 83 | 03-25-91 | -3.7 | 1.5 | -4.4 | 1.5 | -3.8 | 1.5 | .05 | .33 | .28 | |||||
10-01-91 | -1.4 | 1.9 | -2.0 | 2.0 | -2.0 | 2.0 | .22 | .22 | 0 | ||||||
USGS 107 | 04-22-91 | -1.0 | 2.0 | -1.0 | 2.0 | -1.0 | 2.0 | 0 | 0 | 0 | |||||
09-30-91 | 1.0 | 2.0 | 1.0 | 2.0 | 2.0 | 2.0 | .35 | 0 | .35 | ||||||
USGS 110 | 03-26-91 | -3.6 | 1.7 | -1.2 | 2.0 | -3.0 | 2.0 | .23 | .91 | .64 | |||||
10-07-91 | -1.0 | 2.0 | -1.0 | 2.2 | 0 | 2.0 | .35 | 0 | .34 | ||||||
USGS 119 | 04-19-91 | .7 | 1.7 | 0 | 1.6 | 4.0 | 2.0 | 1.26 | .30 | 1.56 | |||||
10-15-91 | -1.0 | 2.0 | -3.0 | 2.0 | 1.4 | 2.1 | .83 | .71 | 1.52 |