Analysis of 2007 Emissions from Power Plants and Other ... - MARAMA

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March 2011Page 22Analysis of Emissions from Power Plants and Other Large Combustion Sources3 Daily Emissions by Operating TimeAre there seasonal or daily patterns in the data, in terms of the amount of emissions andthe proportion of emissions coming from the three classifications?Figures 3-1 and 3-2 plot daily NOx emissions for each of the three classification bins.Figure 3-1 shows total emissions from each bin, while Figure 3-2 shows the percentage ofdaily emissions from each bin. Generally, the combined NOx emissions from units in the15-50% and
Analysis of Emissions from Power Plants and Other Large Combustion Sources March 2011Page 23Zooming in on February 2007, Figure 3-3 plots the daily NOx emissions from each of thethree classification bins. The period of February 4-8, 2007 represents a period when mostof the northeastern part of the country experienced an artic blast of cold air pouring in fromnorthern Canada. In most of the region, temperatures were significantly below normal.On February 5, for example, the daily high temperature in most of the northeast region didnot rise above 20 degrees Fahrenheit, about 10-15 degrees below normal. Similarly, lowtemperatures were in the single digits, about 10-15 degrees below normal. During this 5-day period of extreme cold, the relative importance of emissions from units in the 15-50%and 50 15-50
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State Primary Fuel NOx ControlCapac
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State Primary Fuel NOx ControlMDCoa
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State Primary Fuel NOx ControlPAPAC
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Table 13-2. Capacity percentages by
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State Primary Fuel SO 2 ControlCapa
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FIPS State Component NameCSACodeCSA
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March 2011Page B-2Draft Analysis of
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Analysis of 2007 Emissions from Power Plants and Other ... - MARAMA

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