EPA/NMED/LANL 1998 water quality results: Statistical analysis and comparison to regulatory standards

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Description

Four governmental agencies conducted a round of groundwater, surface water, and spring water sampling at the Los Alamos National Laboratory during 1998. Samples were split among the four parties and sent to independent analytical laboratories. Results from three of the agencies were available for this study. Comparisons of analytical results that were paired by location and date were made between the various analytical laboratories. The results for over 50 split samples analyzed for inorganic chemicals, metals, and radionuclides were compared. Statistical analyses included non-parametric (sign test and signed-ranks test) and parametric (paired t-test and linear regression) methods. The data pairs ... continued below

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Medium: P; Size: 101 pages

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Gallaher, B.; Mercier, T.; Black, P. & Mullen, K. February 1, 2000.

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Description

Four governmental agencies conducted a round of groundwater, surface water, and spring water sampling at the Los Alamos National Laboratory during 1998. Samples were split among the four parties and sent to independent analytical laboratories. Results from three of the agencies were available for this study. Comparisons of analytical results that were paired by location and date were made between the various analytical laboratories. The results for over 50 split samples analyzed for inorganic chemicals, metals, and radionuclides were compared. Statistical analyses included non-parametric (sign test and signed-ranks test) and parametric (paired t-test and linear regression) methods. The data pairs were tested for statistically significant differences, defined by an observed significance level, or p-value, less than 0.05. The main conclusion is that the laboratories' performances are similar across most of the analytes that were measured. In some 95% of the laboratory measurements there was agreement on whether contaminant levels exceeded regulatory limits. The most significant differences in performance were noted for the radioactive suite, particularly for gross alpha particle activity and Sr-90.

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Medium: P; Size: 101 pages

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INIS; OSTI as DE00752394

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  • Other Information: PBD: 1 Feb 2000

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  • Report No.: LA-13682-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/752394 | External Link
  • Office of Scientific & Technical Information Report Number: 752394
  • Archival Resource Key: ark:/67531/metadc707274

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  • February 1, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 3, 2016, 12:54 p.m.

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Gallaher, B.; Mercier, T.; Black, P. & Mullen, K. EPA/NMED/LANL 1998 water quality results: Statistical analysis and comparison to regulatory standards, report, February 1, 2000; Los Alamos, New Mexico. (digital.library.unt.edu/ark:/67531/metadc707274/: accessed July 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.