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Scientific Investigations Report 2012–5068


Reconnaissance of Contaminants in Selected Wastewater-Treatment-Plant Effluent and Stormwater Runoff Entering the Columbia River, Columbia River Basin, Washington and Oregon, 2008–10


Conversion Factors, Datums, and Abbreviations and Acronyms


Conversion Factors


Inch/Pound to SI


Multiply By To obtain
foot (ft) 0.3048 meter (m)
mile (mi) 1.609 kilometer (km)
square mile (mi2) 2.590 square kilometer (km2)
cubic foot per second (ft3/s) 0.02832 cubic meter per second (m3/s)
million gallons per day (Mgal/d) 1.547 cubic meter per second (m3/s)

SI to Inch/Pound


Multiply By To obtain
gram per day (g/d) 0.03527 ounce, avoirdupois (oz)
liter (L) 0.2642 gallon (gal)
liter per day (L/d) 0.2642 gallon per day (gal/d)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:


°F=(1.8×°C)+32.


Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L), micrograms per liter (µg/L), or nanograms per liter (ng/L).


Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C).


CAS Registry Numbers® is a Registered Trademark of the American Chemical Society. CAS recommends the verification of the CASRNs through CAS Client ServicesSM.


Datums


Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).


Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).


Abbreviations and Acronyms


7Q10 the lowest streamflow for seven consecutive days that occurs on average once every 10 years
AOC anthropogenic organic compounds
CAS Chemical Abstracts Service
CERC Columbia Environmental Research Center
CSO Combined sewer overflow
E estimated
EEQ estradiol equivalent factor
EPA U.S. Environmental Protection Agency
GC/MS gas chromatography/mass spectrometry
MDL Method detection limit
NPDES National Pollutant Discharge Elimination System
NWQL National Water-Quality Laboratory
ODEQ Oregon Department of Environmental Quality
PAH Polycyclic aromatic hydrocarbons
PBDE Polybrominated diphenyl ethers
PCB Polychlorinated biphenyls
PIL plan initiation level (SB 737)
QC quality control
RL Reporting limit
RPD relative percent difference
SB Senate Bill
USGS U.S. Geological Survey
WWTP Wastewater-treatment plant
YES Yeast estrogen screen

First posted April 25, 2012

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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