Welcome to the Branch of Quality Systems Laboratory Evaluation data and projects
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Please choose the Laboratory Evaluation data to output:
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Output Quality Assurance data for the National Water Quality Laboratory (NWQL)
BQS projects that look at NWQL quality assurance data include Organic Blind Sample Project (OBSP), Inorganic Blind Sample Project (IBSP), Blind Blank Project (BBP), and Long Term-Method Detection Levels (LT-MDL). |
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Output Precipitation Chemistry Quality Assurance (PCQA) laboratory data
PCQA operates the external quality assurance (QA) projects for the National Atmospheric Deposition Program (NADP). This program includes an inter-laboratory comparison study for both the NADP national trends network and mercury deposition network and blind audit for the mercury deposition network. |
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Output Sediment Laboratory Quality Assurance (SLQA) laboratory data
Participating laboratories are asked to determine suspended sediment concentration, sediment mass, separation of fine- and sand-size material, and particle size distribution using the standard techniques with which they analyze environmental samples. Results are used to assess variability in environmental data and to improve laboratory performance. |
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Output Standard Reference Samples (SRS) laboratory data
This project provides a variety of Standard Reference Samples (SRSs) for laboratory quality assurance testing and are available to purchase for internal quality control. The majority of samples are prepared with water from Colorado streams. |
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Other Laboratory Evaluation Programs:
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BQS projects that look at laboratory quality for all laboratories in use |
LINKS
| National Atmospheric Deposition Program | National Water Quality Laboratory | USGS Precipitation Chemistry Page | |
U.S. Department of the Interior |
U.S. Geological Survey
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Page Last Modified:
June 12, 2023
EROS EXT DEV