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False Positive and Negative Charts January 2011 to December 2016

The charts and data that you might secure from this U.S. Geological Survey (USGS) web page (identified as "OBSP") have not received official USGS approval and as such are provisional and subject to revision. The charts and data are released on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.
Lab Schedule 2033 - NAWQA ACT/ULUG Selected, Filtered Pesticides and Degradates (LS2003 plus 20 compounds)
Lab Schedule 2437 - Pesticides in filtered water by LCMS/MS
Lab Schedule 2440 - Pharmaceuticals in filtered water by LCMS/MS
Lab Schedule 4433 - Waste Indicator Compounds, Unfiltered water by GCMS
Lab Schedule 4434 - Hormones in unfiltered water by GCMS
Lab Schedule 4437 - Heat purgeable volatile organic compounds, purge and trap GCMS (SIM)
Lab Schedule 4440 - Ambient Purgeable volatile organic compounds, purge and trap GCMS

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Page Last Modified: March 1, 2017