Scientific Investigations Report 2006–5232

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

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Table 3. Total organic carbon and purgeable organic compound concentrations and F-pseudosigma estimated sample 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 F-pseudosigma uncertainties are in milligrams per liter (mg/L) or micrograms per liter (µg/L). 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 suggests statistical equivalence at the 95-percent confidence level). Abbreviations: BHV, borehole volume; F-pseudos, F-pseudosigma (estimated sample standard deviation reported as 1 sigma); MRL, minimum reporting level; NA, not applicable; NS, not sampled; USGS, U.S. Geological Survey; <, less than]

Well identifier Sample
date
Total organic carbon (mg/L)   Purgeable organic compounds (µg/L)
1-BHV F-pseudos 3-BHV F-pseudos Z-value 1-BHV F-pseudos 3-BHV F-pseudos 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 <0.4 0.000 <0.4 0.000 0 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 2.08 .354 1.358 .231 1.71 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 2.53 .348 .52 .072 5.66 NS NS NS NS NA
No Name 1 04-11-05 <.4 .000 4.526 .623 2.82 161<MRL 261 = NA 161<MRL 261 = NA 361 = 0
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 5.76 .793 5.39 .741 0.34 161<MRL 261 = NA 161<MRL 261 = NA 361 = 0
USGS 22 04-25-05 NS NS NS NS NA NS NS NS NS NA
USGS 103 04-18-05 4.06 .559 1.94 .267 3.42 NS NS NS NS NA
USGS 119 03-31-05 NS NS NS NS NA 161<MRL 261 = NA 161<MRL 261 = NA 361 = 0

1Sixty-one compounds are less than the minimum reporting levels.

2Calculation of F-pseudosigma estimated sample standard deviation is not applicable for 61 compounds.

3Z-value is set to 0 for 61 compounds.

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