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

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March 2011Page 62Analysis of Emissions from Power Plants and Other Large Combustion SourcesFigure 9-4d. Hourly NOx Emissions by % Operating Time andPA Daily Max Temperature/8-hr Ozone Conc.; July 31-August 6, 2007.CSA: Philadelphia-Camden-Wilmington, DE-MD-NJ-PAFigure 9-4e. Hourly NOx Emissions by % Operating Time andMD Daily Max Temperature/8-hr Ozone Conc.; July 31-August 6, 2007.CSA: Washington-Baltimore-Northern Virginia, DC-MD-VA-WV
Analysis of Emissions from Power Plants and Other Large Combustion Sources March 2011Page 6310 Emission Comparison 2005-2008How variable are emissions from 2005, 2006, 2007, 2008 for these units? Are emissionsin 2007 generally similar to emissions in other years? What sorts of differences standout, if any? Are there units that were not operating in 2007 that were operating in otheryears? On what time frames could this analysis be performed?Using CAMD annually reported CEM data for calendar years 2005, 2006, 2007 and 2008,we compared NOx, SO 2 and heat input values to determine variances in year-to-yearactivity from CEM reporting units. Generally, on a regional and State basis, emissions andheat input for 2007 were in expected ranges compared to 2005 through 2008. While heatinput in 2007 was typically higher in each of the three easternmost RPOs compared to2005/06 and 2008, NOx emissions showed downward trends in each of the regions from2005 through 2008 as the result of implementation of controls associated with the NBP,CAIR and other consent decree agreements. For VISTAS and MRPO, SO 2 also showedthis downward trend from 2005 through 2008. In MANE-VU, however, SO 2 emissionsincreased in 2007 consistent with the increase in heat input during that time. These RPOlevel trends can be seen in Figures 10-1, 10-2 and 10-3 below.Thousands1,4001,200Annual CEM Reported NOx EmissionsVISTAS1,000Annual NOx Emissions (Tons)800600MANE-VUMRPO40020002005 2006 2007 2008 2005 2006 2007 2008 2005 2006 2007 2008Figure 10-1. Annual CEM Reported NOx Emissions.
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