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Caddo Valley (CAD150)

Site Photos
Site Information
Site ID CAD150
Site name Caddo Valley
County Clark
State abbreviation AR
AQS ID 050199991
Latitude; decimal degrees 34.179278
Longitude; decimal degrees -93.098755
Elevation; m 78
Operating agency EPA
Start date 09/28/1988
Primary Land Use Forest
Terrain surrounding site Complex
Distance to nearest NTN site; km .048
Co-located NADP/AMoN Site ID AR03
View Map View Map
Graphical Results
Composition of total nitrogen deposition by species
Trends in total nitrogen deposition
Trends in wet and dry nitrogen deposition
Composition of total sulfur deposition by species
Trends in total sulfur deposition
Trends in wet and dry sulfur deposition
Trend in maximum 8-hour average ozone concentrations
Trend in 3-year average of ozone W126 index
Site History
OZONE : Ozone dryer installed 19-AUG-17
SIGMA_THETA : Sensor unwired. 01-FEB-16
WINDSPEED_SCALAR : Sensor unwired. 01-FEB-16
WIND_DIRECTION : Sensor unwired. 01-FEB-16
WINDSPEED : Sensor unwired. 01-FEB-16
TEMP2 : Sensor unwired. 01-FEB-16
RELATIVE_HUMIDITY : Sensor unwired. 01-FEB-16
TEMPERATURE : 9m temperature measurement with passive aspiration installed. 01-FEB-16
SHELTER_TEMPERATURE : A/C and Heat logger control installed. 05-AUG-15
OZONE : New certification range for site transfer standard 03-FEB-14
OZONE : Foam insulation added to sample line. 03-FEB-14
OZONE : ZSP order changed to SPZ. 04-SEP-13
OZONE : 10 ft. exhaust tubing added to both analyzers. 02-FEB-12
OZONE : Site analyzer with replacement pressure transducer installed. 02-FEB-12
OZONE : Ozone sample line filter removed from inside the shelter. 15-MAY-11
OZONE : 40CFR Part 58 ozone site upgrade completed using Level 2 site transfer standard. 21-FEB-11
OZONE : Ozone tubing changed from 3/8 inch to 1/4 inch. 21-FEB-11
OZONE : 40CFR Part 58 ozone site installed using independent site transfer standard. 07-AUG-10
DATALOGGER : CR3000 datalogger installed. Wiring standardized. 20-FEB-09

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