Special Study - NGS
Visibility Study
The Navaho Generating Station
Visibility Study
Background | Data
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Background
The NGS Visibility Study was conducted by the SRP, the operators
of NGS, from January 10 through March 31, 1990. Its purpose was to address
visibility impairment in Grand Canyon National Park during the winter months and
the levels of improvement that might be achieved if SO2
emissions from NGS were reduced. The study was performed to provide input
to the rulemaking process of the EPA regarding NGS SO2
controls. Perfluorocarbon tracers (PFT) were released from the three
stacks of NGS. Surface and upper air meteorology, particle and gaseous
components, and tracer were measured at many sites. The study concluded that the
NGS plume was not present at Hopi Point for most of the days. The tracer data
quality from this experiment was insufficient for quantitative source
apportionment and the results emphasized the need for better tracer measurements
in future studies.
Data
