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Standard Reference Sample (SRS)
Inorganic Blind Sample (IBSP)
Organic Blind Sample (OBSP)
Long-Term Method Detection Level
Project (LTMDL)
Blind Blank Project Data (BBP)
Laboratory Evaluation (LEP)
National Field Quality
Assurance Program (NFQA)
Precipitation Chemistry Quality
Assurance (PCQA)
Sediment Laboratory Quality Assurance
(SLQA)
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Branch Of Quality Systems Mission -
Science requires consistent collection and reporting of known quality
data
- Monitor, assure, and improve the quality of analytical results
- Documentation of field and laboratory methods
- Proficiency Testing
- Internal and external quality control
- Single and double blind samples
- Documentation of variability and bias of analytical results for:
- District Users
- Laboratory Personnel
- Multiple use and long-term trends
- Documentation of analytical methods used for:
- Inorganic Constituents
- Organic Constituents
- Biological Constituents
BQS Contact Information
Telephone - Staff List
Fax - (303) 236 1880
Postal Address:
USGS-WRD BQS
DFC, Bldg 95
PO Box 25046, MS 401
Denver, CO 80225
Directions to the BQS Office in Lakewood,
CO
BQS Webmaster

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