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Boiler
Capacity:
This field, based on boiler steam flow reported to DOE/EIA,
contains the estimated boiler design capacity in MMBtu/hr.
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Heat
Input:
Heat input is a measure of utilization and can be calculated
by multiplying the quantity of fuel by the fuel's heat content.
The unit of measure is usually MMBtu (million British thermal
units). Heat input is reported directly to ETS on
the monitor level.
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SO2:
SO2, or sulfur dioxide, is an air pollutant emitted primarily
by power plants burning fossil fuels, especially coal, which
is a precursor to acid rain and is associated with other
environmental and human health impacts. The unit of
measure is usually tons. Hourly SO2 emissions, in
pounds, are reported directly to ETS on the monitor level.
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CO2:
CO2, or carbon dioxide, is a product of fossil fuel combustion
which is a dominant greenhouse gas believed to contribute
to global climate change. The unit of measure is usually
tons. Hourly CO2 emissions are reported directly to
ETS on the monitor level.
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NOx:
NOx, or nitrogen oxides, are products of fossil fuel combustion
which are precursors to ozone, or smog, and also contribute
to other environmental and human health impacts. The
unit of measure is usually tons. NOx emissions, which
are not reported directly to ETS, are calculated based on
the hourly NOx rate and heat input.
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NOx
rate:
The NOx emission rate, in lbs/MMBtu, can be measured by
a continuous emissions monitor or calculated by dividing
the NOx emissions (in tons) by the heat input (in MMBtu)
and then multiplying by 2000 lbs/ton. For these reports,
the hourly NOx rate is that reported to ETS. Daily,
monthly, ozone season, and annual NOx rates are calculated
by dividing the NOx tons for the period by the heat input
with the appropriate unit conversions. Hourly NOx
rate is reported directly to ETS on the monitor level.
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Ozone
Season:
The ozone season is the five month period from May through
September when excessive levels of ozone, or smog, are most
likely to form. Ozone season heat input and emissions
are summed from the hourly values. For NOx rate, it
is calculated by dividing the ozone season NOx emissions
by the ozone season heat input, with appropriate unit conversions.
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Ozone
Day:
Ozone day is an average of the days within the ozone season.
Ozone day NOx and heat input were calculated as the average
of the daily measures for all days during the ozone season
for which both NOx rate and heat input had reported values.
The ozone day NOx rate (lbs/MMBtu)was then calculated by
dividing the ozone day NOx emissions (in tons) by the ozone
day heat input (in MMBtu) with appropriate conversion factors.
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Maximum
Hourly: The
maximum hourly measure is determined by selecting the highest
one hour measure for the given day.
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Daily:
The daily measure is calculated by summing up the hourly
measures for heat input and emissions. For NOx rate,
it is calculated by dividing the daily NOx emissions by
the daily heat input, with appropriate unit conversions.
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