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 The Branch of Quality Systems (BQS)

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The US Geological Survey's Branch of Quality Systems (BQS) operates seven blind sample quality assurance projects or programs to benefit the Water Science Centers, the laboratories used by USGS, and to assure USGS analytical data quality.

USGS data users will find helpful charts and tables summarizing laboratory performance over time for different laboratory types and for USGS field technicians and volunteers collecting water samples.

Loch Vale Sampling Site, Colorado


mid-December, 2013
[SRS] The invitations to participate in the Spring 2014 Standard Reference Sample round robin will be sent in mid-December.
<go to SRS home page>

December 27, 2013
[SLQA] The data entry deadline for Sediment Laboratory Quality Assurance results is 12/27/13
<go to SRS data entry>

late January 2014
[SRS] The sample order deadline for Standard Reference Samples will be sometime in late January <SRS Home Page>

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Page Last Modified: December 6, 2013 7:59 AM