Use of historical trending in the validation of hazardous waste site monitoring data

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The Savannah River Site is a large nuclear weapons facility with over 2500 monitoring wells with an annual load of over 300,000 samples. Data are verified and validated using a program that performs routine data format checks as well as a statistical check on whether results fall within the expected range based on a trend of previous values. For analytical data, a linear fit of the previous eight sampling events is calculated along with a predicted value and confidence interval. If the result is outside the confidence interval for a linear fit, then a quadratic fit is attempted and any ... continued below

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13 p.

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Aull, J.E. & Weber, J.H. November 1, 1996.

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Description

The Savannah River Site is a large nuclear weapons facility with over 2500 monitoring wells with an annual load of over 300,000 samples. Data are verified and validated using a program that performs routine data format checks as well as a statistical check on whether results fall within the expected range based on a trend of previous values. For analytical data, a linear fit of the previous eight sampling events is calculated along with a predicted value and confidence interval. If the result is outside the confidence interval for a linear fit, then a quadratic fit is attempted and any value outside of the quadratic fit confidence interval is flagged as an anomaly. The algorithm takes into account 90th percentile detection limits and dilution factors. When there is not enough data on a well to predict a trend, the algorithm uses data from all wells that are in same well group. Use of this historical trending algorithm has provided tremendous improvement over the previous method of performing the historical check. False anomaly indications have been reduced by roughly 60 percent.

Physical Description

13 p.

Notes

INIS; OSTI as DE97060034

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  • Computing in environmental resource management, Research Triangle Park, NC (United States), 2-4 Dec 1996

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  • Other: DE97060034
  • Report No.: WSRC-MS--96-0398
  • Report No.: CONF-961238--1
  • Grant Number: AC09-89SR18035
  • Office of Scientific & Technical Information Report Number: 402502
  • Archival Resource Key: ark:/67531/metadc674772

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • November 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 10, 2016, 1 p.m.

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Aull, J.E. & Weber, J.H. Use of historical trending in the validation of hazardous waste site monitoring data, article, November 1, 1996; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc674772/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.