USGS - science for a changing world

Branch of Quality Systems

Long Term-Method Detection Levels (LT-MDL)
for the US Geological Survey, National Water Quality Laboratory



LTMDL CHARTS and TABLES

Arsenic Speciation
Carbon
Colorimetry
Gasoline Oxygenates & BTEX
Ion Chromatography
ICP (filtered)
ICP (whole water)
ICP-MS (filtered)
ICP-MS (whole water)
Ion Selective Electrode
Mercury
Nutrients
Pesticides(Sch 2001)
Pesticides (Sch 2033)
Pharmaceuticals
Physical Properties
Polar Pesticides
Radon
Semivolatiles
UV Absorbance
Volatiles
Waste Water
Waste Water 2 (Sch 4433)
HOW TO READ THE LTMDL CHARTS AND TABLES:
Tables
Charts
Scattergrams
EXAMPLE
EXAMPLE
example of a scattergram example whisker chart


For further information, contact:

Long-term Method Detection Level Project Chief (bfconnor@usgs.gov)
U.S. Geological Survey
Denver Federal Center
Mail Stop 401, Box 25046
Denver, CO 80225
303.236.1877


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