Branch of Quality Systems (BQS)
Laboratory Evaluation Project (LEP) On-line application |
Laboratories - |
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The U.S. Geological Survey (USGS) conducts many water-quality projects that determine the quality of our nation's waters. The projects vary in scope, from determining exceedances of water quality standards for specific analytes to quantifying background concentrations in pristine watersheds. USGS water-quality projects must ensure data-collection methods, including laboratory analyses, are appropriate to each particular study. The selection of a laboratory for USGS project use is determined by assessing laboratory performance using applicable methods for analytes of interest within a specific concentration range. Laboratories must disclose the following information to USGS for each analyte/method pair: reporting level, method detection level, analytical concentration ranges, percent relative standard deviation (%RSD) or mean percent recovery (% Recovery), and the concentration(s) of the quality control (QC) samples used to determine %RSD or % Recovery. Most importantly though, we require current tabulated
proficiency test sample data (blind) for each analyte/method pair requested,
that support your ability to perform adequately within these limits.
Thank you for supporting USGS projects. |
Required Information Analytical Range Required DATA Double-blind test samples |
Contact Us:
LEP Chief, BQS
Brooke Connor
303-236-1877
bfconnor@usgs.gov