Branch of Quality Systems

The USGS Branch of Quality Systems - Organic Blind Sample Project (OBSP) purpose is to monitor, assess and evaluate the USGS National Water Quality Laboratory (NWQL) organic analytical results through the use of blind quality assurance samples. The OBSP was implemented in 1996 and reviews over 600 organic constituents.

Data Assessment by Analyte

Data Assessment by Method

Data Assessment by analyte

Data Assessment by Analyte

OBSP maintains a database for the retrieval, assessment and storage of blind quality assurance sample results. Tools used in assessing the blind sample results can be viewed by analyte:
Data Assessment by NWQL Method

Data Assessment Tools

Data Assessment Summaries

Data Assessment

Data Assessment Tools

OBSP maintains a database for the retrieval, assessment and storage of blind quality assurance sample results. Tools used in assessing the blind sample results are:
Summaries Summaries
Periodically OBSP provides data quality assessment Summaries. These Summaries document changes, trends and analyte performance of the NWQL organic Methods over time.

LINKS

 
USGS Water Resources Discipline, Water Data    
Office of Water Quality National Atmospheric Deposition Program National Trends Network
 
USGS Water Resources Discipline Publications    
National Water Quality Laboratory  

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Page Last Modified: October 8, 2014