TRS compounds are formed during the anaerobic decomposition
(i.e., decay in the absence of oxygen) of organic materials,
and from certain industrial and commercial processes.
Typical sources include packing plants, tanneries, waste
treatment plants, oil and natural gas wells, and refineries.
TRS is typically composed of hydrogen sulfide, methyl
mercaptan, dimethyl sulfide, dimethyl disulfide and other
volatile compounds containing reduced sulfur.
Potential health impacts associated with low-level exposure
include headaches, depression, fatigue and nausea. Exposure
to higher levels can result in eye and respiratory
irritation, olfactory nerve fatigue and pulmonary edema, and
in cases of more extreme exposure, unconsciousness,
respiratory failure and death. Potential welfare impacts
include detrimental effects on plant life.
The State ambient air quality standards for TRS are set
forth in NDEQ Title 129 Chapter 4. These standards are 10
ppm as a 1-minute average and 0.10 ppm as a 30-minute
average. A National Ambient Air Quality Standard (NAAQS) has
not been established for TRS.
NDEQ operates three TRS monitors located in the Lexington
and Dakota City/South Sioux City areas. Additional
information on TRS and on ambient air monitoring is
available on this NDEQ web site in the following:
Nebraska Air Quality Reports- These annual reports provide:
monitor locations, air monitoring data summaries, the
ambient air quality standards, pollutant sources and their
impacts, and regional air quality reviews.
Nebraska Ambient Monitoring Network Review Reports – These
annual reports describe the Nebraska Ambient Air Monitoring
Network including changes and anticipated changes.
If the above references do not provide the information you
require, please contact the Air Quality Division at either
(402) 471-0007 or (402) 471-2142 to inquire about the
availability of additional information, including ambient
air quality monitoring data.
Or send an email inquiry to:
The TRS data available on this web site may be subject to
change based upon periodic quality assurance reviews.
Starting in 2004, each set of monthly data on this web site
has a revision date listed on it.