Document ID: EPA-HQ-OAR-2018-0794-5781
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2023-04-24T04:00Z

MEMORANDUM

FROM: 		Sarah Benish, Nick Hutson, Erich Eschmann
			U.S. EPA/OAR
TO: 			Docket ID. No: EPA-HQ-OAR-2018-0794
DATE:		January 2023
SUBJECT: 	2023 Technology Review for the Coal- and Oil-Fired EGU Source Category

This memorandum documents detailed data and analysis, including costs and filterable PM and mercury emissions impacts, as part of the technology review the U.S. Environmental Protection Agency (EPA) conducted in accordance with section 112(d)(6) of the Clean Air Act (CAA) to identify developments in practices, processes, and control technologies applicable to sources subject to the National Emissions Standards for Hazardous Air Pollutants (NESHAP) for coal- and oil-fired electric utility steam generating units (EGUs) (40 CFR 63, subpart UUUUU). The analysis focused on developments that have occurred since the 2020 technology review (see EPA-HQ-OAR-2018-0794-0015). This memorandum is organized as follows:
 Background 
 Filterable Particulate Matter (fPM) Emission Limit
 Mercury Limit for Lignite-Fired EGUs
 Review of Acid Gas Emission Limits
Background
Sections 112(d)(2) and (3) of the CAA direct the EPA to develop maximum available control technology (MACT) standards to control hazardous air pollutants (HAP) emissions from major sources. For coal- and oil-fired EGUs, the MACT standards for major sources were promulgated on February 16, 2012, and are codified at 40 CFR part 63, subpart UUUUU (commonly referred to as Mercury and Air Toxics Standards (MATS)). 
Section 112 of the CAA establishes a two-stage regulatory process to develop standards for emissions of HAP. Under CAA section 112(f)(2), the EPA assesses the residual risk for a source category to protect public health with "an ample margin of safety" or to prevent adverse environmental effects considering energy, costs, and other relevant factors within 8 years of promulgation of standards. CAA section 112(d)(6) requires EPA to review technology-based standards and to revise them "as necessary (taking into account developments in practices, processes, and control technologies)" no less frequently than every 8 years. These two reviews are commonly combined into a single rulemaking and referred to as the "risk and technology review" or RTR. 
The EPA did not promulgate any revisions to the MATS rule based on its findings in the 2020 RTR, concluding that the residual risk of HAP remains low and no developments in practices, processes, or control technologies support altering the standards. The 2020 Technology Review concluded that existing air pollution control technologies that were in use were well-established and provided the capture efficiencies necessary for compliance with the MATS emission limits. However, in the 2020 Technology Review, the EPA did not consider developments in the cost and effectiveness of these proven technologies and did not evaluate the current performance of emission reduction control equipment and strategies at existing MATS-affected EGUs, to determine whether revising the standards were warranted. 
Pursuant to Executive Order 13990 "Protecting Public Health and the Environment and Restoring Science to Tackle the Climate Crisis" (86 FR 7037; January 25, 2021), the EPA initiated review of the 2020 RTR. In the same action as the proposed rulemaking reaffirming it remains appropriate and necessary to regulate HAP, EPA solicited information on the cost and performance of new or improved technologies that control HAP emissions, improved methods of operation, and risk-related information to further inform the Agency's assessment of the MATS RTR. Generally, the commenters were unaware of new technology, but indicated the current technology is more widely used, more effective, and cheaper than at the time of adoption of MATS (EPA-HQ-OAR-2018-0794-4962, EPA-HQ-OAR-2018-0794-5121, EPA-HQ-OAR-2018-0794-4942). Specific data or information regarding the technology review used to support this proposed action are discussed within.  
Filterable Particulate Matter (fPM) Emission Limit
Baseline fPM Rates
The EPA evaluated quarterly fPM compliance data for coal-fired EGUs from 2017 to 2021 for units in the contiguous United States based on data availability. Rate estimates of fPM were based on recent data submitted via the EPA's Compliance and Emissions Data Reporting Interface (CEDRI) by facilities with affected EGUs. Quarterly data from 2017 (variable quarters) and 2019 (quarters three and occasionally four) were first reviewed because data for all affected EGUs subject to numeric emission limits had been previously extracted from CEDRI. In addition, the EPA obtained first and third quarter data for calendar year 2021 for a subset of EGUs with larger fPM rates (generally greater than 1.0E-02 lb/MMBtu for either 2017 or 2019). The quarterly 2021 data summarizes recent emissions and also reflect the time of year where electricity demand is typically higher and when EGUs tend to operate more and with higher loads. We removed units from this analysis that have shut down, will shut down or no longer burn coal/oil by December 31, 2028, and report data in lbs/MWh. The EPA evaluated fPM rates for a total of 275 individual EGUs. Only one facility outside the continental United States is expected to be subject to MATS by the proposed compliance period (up to three years after the effective date of the rule amendments).
Since operation of an EGU can vary year to year in response to weather, fuel prices, and energy demand, all available quarterly fPM data were evaluated independently for each EGU. Summary statistics (median, max, 99[th], 95[th], 90[th], 85[th], 80[th], and 75[th] percentiles) for each quarter were compiled to characterize emissions variability within the quarter and are discussed below. Linear interpolation was used when the desired percentile fell between two points. Because in some cases multiple EGUs are routed to a single stack or a single EGU is routed to two stacks, the number of stacks is not the same as the number of EGUs. For units that demonstrate compliance by conducting quarterly stack testing, we calculated the percentiles for each quarter using the available (typically three) stack test runs. Similarly, for units with PM CEMS, the percentiles are calculated using quarterly (typically 90 days) 30-day running average PM rates. 
We assessed summary statistics of the lowest quarter's fPM rate to evaluate the most representative metric to describe baseline fPM emissions. We evaluated the lowest quarter's maximum, 99[th], 90[th], 85[th], 80[th], 75[th], and 50[th] percentiles fPM rates for each facility, presented in Appendix A. Two EGUs (7213_B_1 and 4271_B_B1) report valid quarterly 30-day rolling average fPM rates of 0.000 lb/MMBtu, which we assume is greater than 0.0 but less than 5.0E-03 lb/MMBtu due to rounding in the report. The average difference between the 99[th] and 50[th] percentiles for all EGUs is 9.85E-04 lb/MMBtu (median=6.22E-04 lb/MMBtu), which demonstrates that individual stack tests or the 30-day average CEMS data is relatively consistent within each quarter. The largest difference between the 99[th] and 50[th] percentiles of 1.42E-02 lb/MMBtu is for Harrington unit 62B (6193_B_062B). Harrington unit 62B uses quarterly stack testing and emissions averaging with a co-located EGU to demonstrate compliance with the 3.0E-02 lb/MMBtu standard. 
The distribution of fPM rates for all facilities is displayed in Figure 1, illustrating the choice of percentile (i.e., 99[th] vs. 50[th] percentile) changes the baseline fPM rates very little. Since the variability of the lowest quarter's 99[th], 90[th], 85[th], 80[th], 75[th], and 50[th] percentiles is very similar, there is little impact on the amount of emission reductions and total annualized costs when looking at the fleet on whole.
FIGURE 1 -- DISTRIBUTION OF FPM RATES (LB/MMBTU) FOR ALL AFFECTED EGUS BASED ON THE LOWEST QUARTER'S 99[TH], 90[TH], 85[TH], 80[TH], 75[TH], AND 50[TH] PERCENTILES
NOTE: THE WHISKERS OF EACH BOX EXTEND FROM THE 5[TH] TO 95[TH] PERCENTILES AND THE BOX DENOTES THE 25[TH] AND 75[TH] PERCENTILES. THE CENTRAL HORIZONTAL LINE INDICATES THE MEDIAN, THE RED DIAMOND SHOWS THE MEAN, AND THE GREEN X DISPLAYS THE MAXIMUM FPM RATE
The 99[th] percentile of the lowest quarter was chosen to describe the baseline fPM rate for each EGU. Appendix B summarizes the baseline fPM rates and facility assumptions used in this analysis. We chose this baseline since units demonstrated they could meet this value 99 percent of the time during that quarter with their current control configuration. This approach may conservatively overestimate emissions. By using the lowest quarter's 99[th] percentile as the baseline, the analyses account for actions individual EGUs have already taken to improve and maintain PM emissions. Accordingly, the results identify the facilities requiring upgrades in PM controls to meet a lower limit. Figure 2 illustrates the baseline fPM rates for all affected units compared to the three assessed standards of 1.5E-02, 1.0E-02, 6.0E-03 lb/MMBtu. All affected units meet the current standard of 3.0E-2 lb/MMBtu, 96 percent of the capacity attains 1.5E-02 lb/MMBtu, 91 percent of the capacity achieves 1.0E-02 lb/MMBtu, and 72 percent of the capacity is below 6.0E-03 lb/MMBtu. A recent report and a study received in Docket ID No. EPA-HQ-OAR-2018-0794-5121 have similarly concluded that lowering the PM emission rate would be possible without a large impact on the coal- and oil-fired fleet. 

FIGURE 2 -- FPM RATE DISTRIBUTION USING THE 99[TH] PERCENTILE OF THE LOWEST QUARTER AS THE BASELINE FOR AFFECTED COAL-FIRED EGUS IN THE CONINENTAL UNITED STATES

Assessment of Facility Characteristics on fPM Rates
In this section, we evaluate the baseline fPM rate (i.e., the lowest quarter's 99[th] percentile for each unit) summary statistics (mean, 5[th] percentile, median, and 95[th] percentile) based on facility characteristics reported in NEEDS.
Fuel type
Table 1 summarizes baseline fPM rate summary statistics (mean, 5[th] percentile, median, and 95[th] percentile) of EGUs based on their fuel type. For the majority of units burning either bituminous or subbituminous coal only we find the mean, 5[th] percentile, and median baseline fPM rates fall well below the most stringent standard considered of 6.0E-03 lb/MMBtu. Subbituminous coal has a larger 95[th] percentile of baseline fPM rates, 1.6E-02 lb/MMBtu, compared to bituminous coal of 1.1E-02 lb/MMBtu. However, waste coal is associated with the largest 95[th] percentile of the baseline fPM rates, 1.7E-02 lb/MMBtu, but has comparable mean, 5[th] percentile, and median baseline fPM rates as the other fuel types. 
TABLE 1 -- BASELINE FPM RATES (LB/MMBTU) BASED ON DIFFERENT FUEL TYPES REPORTED BY NEEDS
                                   Fuel Type
                                    Number
Baseline fPM Rate (lb/MMBtu)
                                       
                                       
                                     Mean
                               5[th] percentile
                                    Median
                               95[th] percentile
Bituminous
73
4.70E-03
1.00E-03
4.00E-03
1.06E-02
Bituminous, Natural Gas
5
4.60E-03
1.80E-03
3.80E-03
8.50E-03
Bituminous, Petroleum Coke
2
1.60E-03
1.20E-03
1.60E-03
2.00E-03
Bituminous, Subbituminous
42
3.80E-03
1.60E-03
3.30E-03
6.90E-03
Bituminous, Subbituminous, Petroleum Coke
3
2.70E-03
1.20E-03
3.00E-03
3.90E-03
Bituminous, Waste Coal
6
7.40E-03
3.00E-03
7.00E-03
1.50E-03
Lignite
13
4.90E-03
1.50E-03
3.80E-03
9.00E-03
Lignite, Subbituminous
9
7.30E-03
2.50E-03
7.00E-03
1.32E-02
Subbituminous
106
4.60E-03
6.00E-03
3.70E-03
1.55E-02
Subbituminous, Petroleum Coke
1
                                   7.90E-03
Waste Coal
15
                                   8.40E-03
                                   3.20E-03
                                   6.00E-03
                                   1.65E-02

Capacity
Baseline fPM rate summary statistics (mean, 5[th] percentile, median, and 95[th] percentile) for affected facilities grouped by capacity bins (MW) are shown in Table 2. The median and mean baseline fPM rates across the different capacity bins are similar, on the order of 3.0E-03 to 5.0E-03 lb/MMBtu. Additionally, the capacity bins have similar 5[th] percentile and 95[th] percentile baseline fPM rates. 
TABLE 2 -- SUMMARY STATISTICS OF BASELINE FPM RATES (LB/MMBTU) ACROSS DIFFERENT CAPACITY BINS (MW) FOR AFFECTED UNITS
Capacity Bin (MW)
Number of EGUs
Baseline fPM Rate (lb/MMBtu)

Mean
5[th] percentile
Median
95[th] percentile
0-200
45
5.20E-03
9.00E-04
3.60E-03
1.51E-02
200-400
44
3.90E-03
1.10E-03
3.00E-03
8.60E-03
400-600
92
4.90E-03
6.00E-04
3.90E-03
1.51E-02
600-800
62
5.00E-03
1.00E-03
4.00E-03
1.16E-02
800-1000
21
5.20E-03
2.00E-03
5.20E-03
9.20E-03
1000+
11
5.20E-03
1.90E-03
3.90E-03
1.06E-02

Pollution Control Equipment
Table 3 summarizes the distribution (mean, 5[th] percentile, median, and 95[th] percentile) of baseline fPM rates based on the primary PM control device and use of dry sorbent injection (DSI). Units with wet scrubbers (WS) only are associated with the largest baseline fPM rate distributions, but we find all primary PM control devices are associated with baseline fPM rates below the current standard of 3.0E-02 lb/MMBtu. Excluding the WS, all primary PM control devices indicate a median baseline fPM rate below the most stringent standard considered, 6.0E-03 lb/MMBtu. While the majority of units utilize a fabric filter (FF) or electrostatic precipitator (ESP) only to control fPM, we find units with multiple control devices have smaller 95[th] percentile baseline fPM rates. For instance, the 95[th] percentile of FF or ESP only is 1.2E-02 and 1.4E-02 lb/MMBtu, respectively, whereas some combinations of control devices (i.e., FF+ additional non-ESP control, ESP+ FF, and ESP+cyclone) indicate a 95[th] percentile between 6.0E-03 to 7.8E-03 lb/MMBtu. We find no major differences in the baseline fPM rate distribution between units that use DSI and that do not utilize DSI. 
TABLE 3 -- BASELINE FPM RATES (LB/MMBTU) BASED ON THE PRIMARY PM CONTROL DEVICE AND USE OF DRY SORBENT INJECTION (DSI) INDICATED BY NEEDS

Technology
Number of EGUs
Baseline fPM Rate (lb/MMBtu)
Primary PM Control Device

Mean
5[th] percentile
 Median
95[th] percentile

FF only
97
4.20E-03
6.00E-04
3.00E-03
1.17E-02

FF + Additional non-ESP Control
21
3.60E-03
7.00E-04
3.00E-03
7.00E-03

ESP only
109
5.60E-03
1.80E-03
4.70E-03
1.40E-02

ESP + FF
32
3.90E-03
8.00E-04
4.00E-03
7.80E-03

ESP + Other Control Device (not FF)
12
4.80E-03
2.00E-03
4.00E-03
1.15E-02

ESP + Cyclone
2
5.50E-03
5.00E-03
5.50E-03
6.00E-03

Wet scrubber
2
1.95E-02
1.82E-02
1.95E-02
2.08E-02
Use of DSI?
Yes
44
5.80E-03
1.20E-03
4.90E-03
1.15E-02

No
231
4.60E-03
1.00E-03
3.80E-03
1.12E-02

Existing PM Control Technologies
40 CFR part 63, subpart UUUUU regulates the fPM emissions as a surrogate for non-Hg HAP metals. To comply with the CAA section 112(d)(6) requirement, the EPA conducted a technology review in 2020, "National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units - Reconsideration of Supplemental Finding and Residual Risk and Technology Review" (85 FR 31286; May 22, 2020) (2020 Final Action). The results of the 2020 technology review are in a memorandum entitled "Technology Review for the Coal- and Oil-Fired EGU Source Category, July 2018" (Docket ID No. EPA-HQ-OAR-2018-0794-0015). 

At the time of promulgation of MATS, the primary control devices installed at EGUs for control of PM included ESPs and FFs. The EPA found that ESPs are the most common PM control devices at coal- and oil-fired EGUs. An ESP removes particles from a gas stream using electrical energy to charge the particles and is capable of greater than 99 percent collection efficiencies. FFs, also referred to as a baghouses, remove particles from the gas stream by depositing the particles on fabric material and generally are capable of collection efficiencies of more than 99.9 percent. 

The 2020 technology review did not identify developments in practices, processes, or control technologies for non-Hg HAP metals. However, in the EPA's review of the appropriate and necessary finding that was proposed on February 9, 2022 (87 FR 7624) (2022 Proposal), the EPA also solicited information to further inform the Agency's review of the MATS RTR. The EPA received comments during the 2022 Proposal that the industry has identified low-cost methods to achieve lower PM emissions than the current standard of 3.0E-02 pounds per million British thermal units (lb/MMBtu) since promulgation of MATS in 2012, including improvements to monitoring and control technologies. In addition, the Andover Technology Partners report attributes significant improvements in PM emission rates since 2011 to wider deployment today of technologies that may have existed but not widely used in 2011, improved practices due to more regular and robust monitoring, and improvements to monitoring and ESP/FF technology. 

New Cost Assumptions for Additional fPM Reductions
This section summarizes the cost and emissions reductions assumptions used by EPA in this memo. These assumptions are based on technical reports developed by Sargent and Lundy (S&L) for EPA, as cited below in each section. The S&L cost assumptions used in this analysis will be discussed in further detail below for each PM control device.

 Electrostatic precipitators (ESP)
EPA's assumptions for upgrades to existing ESPs are based on a report prepared by S&L for EPA titled: "PM Incremental Improvement Memo" (available in the docket).  This study summarizes potential upgrades or modifications to existing particulate control devices that could be made to incrementally improve the reduction of fPM. The study discusses three ranges of upgrades to existing ESP devices, the potential costs and performance of which are summarized in in Table 4.
TABLE 4 -- COST ASSUMPTIONS FOR IMPROVING FILTERABLE PM CONTROL AT EXISTING ESP DEVICES
Option
                                Minor Upgrades
                                  (Low Cost)
                               Typical Upgrades
                                (Average Cost)
                                 ESP Rebuild 
                                  (High Cost)
Estimated Cost 
                            $6-$27 / kilowatt (kW)
                                 $45-$65 / kW
                                 $75-$100 / kW
Potential Performance Improvement 
(Not Guaranteed Performance)
5%-10% reduction in fPM emissions; not applicable to units with current emission rates <= 0.010 lb/MMBtu  
10-20% reduction in fPM emissions; not applicable to units with current emission rates <= 0.010 lb/MMBtu  
                   Performance limited to 99.9% fPM removal
                              (clean conditions)

Baghouse/Fabric Filter
EPA's assumptions for upgrades to existing FF are based on a report prepared by S&L for EPA titled: "PM Incremental Improvement Memo" (available in the docket).  This study summarizes potential FF improvement options including upgrading the bag type, which can result in lower fPM emissions. In this cost analysis, EPA calculates the incremental cost of replacing standard bags with fiberglass bags with polytetrafluoroethylene (PTFE) membrane coating based on the assumptions detailed in the memo. The cost is estimated at the unit level, and ranges from about $15,000 per year to $528,000 per year. This cost analysis assumes that these upgrades reduce filterable PM by up to 50 percent.
EPA's assumptions for the cost of new fabric filters are based on the report prepared by S&L for EPA titled: "Particulate Control Cost Development Methodology." This report provides a methodology used for estimating the unit-level costs of constructing and operating new FF. The cost analysis in this memo assumes unit-level cost estimates representing the capital and operation costs associated with a new 6.0 air-to-cloth (A/C) pulse-jet FF (PJFF). This cost analysis assumes that a new FF reduces fPM by up to 90%.
Other control technologies
While ESPs and FF are the primary control technologies used to control PM, some facilities can achieve fPM reductions using alternative equipment. For instance, two units at Colstrip utilize a venturi WS for fPM control. Since WS are less effective at reducing fPM, particularly smaller particles, we assume a minimal cost ($10/kW) for WS maintenance or minor upgrades for these EGUs to meet a potential 0.015 lb/MMBtu standard. To achieve a 1.0E-02 and 6.0E-03 lb/MMBtu standards, we assume a FF would be installed. Unit-specific FF cost estimates for each unit at this facility were estimated based on the report prepared by S&L for EPA titled: "Particulate Control Cost Development Methodology." 
Particulate matter and non-Hg HAP metal Reductions
In this memo, the EPA assumes that the amount of fPM and therefore non-Hg HAP metal reductions depend on the current PM control configuration as well as the potential fPM limit analyzed, as summarized in Table 5. Existing control assumptions are based on EPA's NEEDS database.
For units with an existing ESP and no FF, we assume that the ESP upgrades summarized in Table 4 would be necessary to reduce fPM to either 1.5E-02 or 1.0E-02 lb/MMBtu. We assumed the maximum potential performance improvement associated with the upgrade options (i.e., 10% reduction for minor upgrades and 20% reduction for typical upgrades). In order to reduce fPM to 6.0E-03 lb/MMBtu or below, the EPA assumes that a FF is required. For EGUs with an existing ESP and without an existing FF, we assume the baseline fPM rate will decrease by 90 percent, with a maximum reduction to 2.0E-03 lb/MMBtu. 
For EGUs with an existing FF, the EPA assumes that FF bag upgrades will reduce fPM rates to 6.0E-03 lb/MMBtu for all three potential fPM standards. 
For the one facility with existing venturi-type WS (and without an existing ESP or FF), EPA assumes that ESP upgrades will reduce fPM emission to 1.5E-02 lb/MMBtu. To achieve the lower potential fPM standards, EPA assumes that these EGUs would require FF installation, reducing baseline fPM rates by 90% subject to a floor of 2.0E-03 lb/MMBtu. 
TABLE 5 -- SUMMARY OF TECHNOLOGY AND FPM RATE ASSUMPTIONS FOR DIFFERENT PM CONTROL DEVICES

Potential fPM Standards (lb/MMBtu)
PM Control Device
1.5E-02
1.0E-02
6.0E-03

Technology Assumption
Assumed fPM Rate (lb/MMBtu)
Technology Assumption
Assumed fPM Rate (lb/MMBtu)
Technology Assumption
Assumed fPM Rate (lb/MMBtu)
ESP only
ESP upgrade
1.5E-02
ESP upgrade
1.0E-02
New FF installation
90% reduction from baseline, up to 2.0E-03 lb/MMBtu
FF only or FF in combination with other PM controls
FF bag upgrade
6.0E-03
FF bag upgrade
6.0E-03
FF bag upgrade
6.0E-03
Wet Scrubber
WS maintenance/
ESP upgrade
1.5E-02
New FF installation
90% reduction from baseline, up to 2.0E-03
New FF installation
90% reduction from baseline, up to 2.0E-03

Filterable PM reductions (fPMred) for each potential limit (L; 1.5E-02, 1.0E-02, 6.0E-03 lb/MMBtu) were estimated using the year-specific annual heat input from NEEDS, following Equation 1:
fPMredtonsyr=L-PM rate lbMMBtuxHeat InputMMBtuyrx2000 tonslb         (1)
Emissions ratios were used to transform the fPM reductions at each EGU into PM2.5 and individual non-Hg HAP metal reductions. The non-Hg HAP metals that affect human health assessed in this analysis included arsenic (As), beryllium (Be), cadmium (Cd), cobalt (Co), chromium (Cr), manganese (Mn), nickel (Ni), Lead (Pb), antimony (Sb), and selenium (Se). The emissions ratios, available in the docket, specific for each fuel type and PM control type for EGUs still in operation, were derived from 2010 Information Collection Request (ICR) data, which is described in the 2018 memo, "Emission Factor Development for RTR Risk Modeling Dataset for Coal- and Oil-fired EGUs".
Table 6 summarizes the total emission reductions obtained at affected units for fPM, fPM2.5, and speciated non-Hg HAP metals for the three potential fPM limits. Since non-Hg HAP metals comprise ~0.8 percent of the fPM, there are comparatively more reductions of fPM and fPM2.5. Unit-specific fPM emission reductions are provided in Appendix C.
TABLE 6 -- FPM, FPM2.5, AND SPECIATED NON-HG HAP METAL REDUCTIONS (TONS/YEAR) ESTIMATED AS A RESULT OF THREE POTENTIAL FPM LIMITS OF 1.5E-02, 1.0E-02, AND 6.0E-03 LB/MMBTU
                        Emission Reductions (tons/year)
                       Potential PM Standard (lb/MMBtu)

                                    1.5E-02
                                    1.0E-02
                                    6.0E-03
fPM
                                      463
                                     1631
                                     6163
fPM2.5
                                      246
                                      844
                                     3022
Total non-Hg metallic HAP
                                     1.41
                                     5.34
                                     24.7
As
                                     0.07
                                     0.23
                                     0.91
Be
                                     0.01
                                     0.02
                                     0.06
Cd
                                     0.01
                                     0.03
                                     0.11
Co
                                     0.02
                                     0.07
                                     0.27
Cr
                                     0.31
                                     1.34
                                     6.14
Mn
                                     0.45
                                     1.21
                                     5.55
Ni
                                     0.17
                                     0.71
                                     2.82
Pb
                                     0.13
                                     0.42
                                     1.04
Sb
                                     0.02
                                     0.08
                                     0.27
Se
                                     0.22
                                     1.23
                                     7.56

Annual fPM Costs and Cost Effectiveness
Annual control cost and emissions reduction assumptions are assigned to each unit based on the information presented above in sections 2.1, 2.2, 2.3, and 2.4. Capital costs are annualized over a lesser of a 15-year time horizon or the planned retirement date of each EGU. For the 1.5E-02 and 1.0E-02 lb/MMBtu standards, costs are presented as a range to reflect the range of ESP upgrade costs developed by S&L (Table 4). Table 7 summarizes the annual costs for the affected units as well as the fPM and non-Hg HAP metal cost effectiveness. Unit-specific costs to achieve these three potential limits are provided in Appendix C.
TABLE 7 -- TOTAL ANNUALIZED COSTS ($M) AND COST EFFECTIVENESS OF FPM ($K/TON) AND NON-HG HAP METALS ($K/LB) FOR THREE POTENTIAL FPM LIMITS OF 1.5E-02, 1.0E-02, AND 6.0E-03 LB/MMBTU

                       Potential fPM Standard (lb/MMBtu)

1.5E-02
1.0E-02
6.0E-03
Annualized Costs ($M)
13.9-19.3
77.3-93.2
633
Cost Effectiveness based on Actual Emissions

fPM ($k/ton)
30.0-41.6
47.4-57.1
103

fPM2.5 ($k/ton)
56.5-78.4
91.6-110
209

Total non-Hg metallic HAP ($k/lb)
4.93-6.84
7.23-8.74
12.8

As ($k/lb)
97.7-136
167-200
349

Be ($k/lb)
1250-1730
2370-2860
5720

Cd ($k/lb)
571-792
1140-1370
2990

Co ($k/lb)
311-432
518-625
1170

Cr ($k/lb)
22.2-30.8
28.8-34.7
51.5

Mn ($k/lb)
15.5-21.5
31.8-38.4
57.0

Ni ($k/lb)
41.9-58.2
54.5-65.7
112

Pb ($k/lb)
53.7-74.6
91.8-110
304

Sb ($k/lb)
345-478
510-615
1150

Se ($k/lb)
31.4-43.6
31.5-38.0
41.8
Cost Effectiveness based on Allowable Emissions
Total non-Hg metallic HAP ($/lb)
17.7-24.6
98.5-118.7
806.3

Since the three potential standards impact only a small portion of the fleet, we also assess the cost-effectiveness of allowable emissions from the entire fleet. Allowable fPM emissions at the current standard of 3.0E-02 lb/MMBtu were calculated for the entire fleet using unit-specific heat rate inputs from NEEDS. From the fPM emissions, we estimate the total non-Hg HAP emissions using emissions ratios of non-Hg metal HAP/fPM discussed above. We use an average emission ratio (non-Hg HAP/fPM) of 4.10E-03 lb/lb for units with baseline fPM rates below 6.0E-03 lb/MMBtu. We estimate a total of 7.8E05 lb/year (392 tons/year) total non-Hg HAP emissions from EGUs included in this analysis. This cost-effectiveness approach using allowable emissions is not comparable to the standard methodology used in section 112 rulemakings, but does consider if the fleet were operating at levels allowed by the 2012 MACT rule. 
Mercury Limit for Lignite-Fired EGUs
 Hg Emissions from Coal-fired EGUs
The EPA estimated Hg emissions from coal-fired power plants in 2010 (pre-MATS) to be 29 tons. In 2017, after full implementation of the MATS rule, the EPA estimated Hg emissions had been reduced to 4 tons, an 86 percent decrease. This decline was not entirely due to an increased use of Hg controls as there were also significant changes in the power sector (e.g., coal plant retirements, increase use of natural gas and renewable energy, etc.) in the same time period.  

Hg emission reductions have continued to decline as more coal-fired EGUs have retired or reduced utilization. The EPA estimated that 2021 Hg emissions from coal-fired EGUs were 3 tons (a 90 percent decrease compared to pre-MATS levels). However, units burning lignite coal (or permitted to burning lignite) accounted for a disproportionate amount of the total Hg emissions in 2021. As shown in Table 8 below, lignite-fired EGUs, located exclusively in North Dakota and Texas, were the top 18 highest Hg emitting EGUs. Overall, lignite-fired EGUs were responsible for almost 30 percent of all Hg emitted from coal-fired EGUs in 2021, while generating about 7 percent of total 2021 megawatt-hours. Lignite accounted for 8 percent of total U.S. coal production in 2021.

                    TABLE 8 --  TOP HG-EMITTING EGUS IN 2021
                                     Rank
                                      EGU
                            2021 Hg Emissions (lb)
                                     State
                                       1
                                 Coal Creek 2
                                     181.8
                                      ND
                                       2
                                 Coal Creek 1
                                     175.6
                                      ND
                                       3
                                  Oak Grove 2
                                     149.8
                                      TX
                                       4
                                 Martin Lake 3
                                     134.4
                                      TX
                                       5
                                  Oak Grove 1
                                     112.7
                                      TX
                                       6
                                 Martin Lake 2
                                     111.0
                                      TX
                                       7
                               Milton R Young B2
                                     103.1
                                      ND
                                       8
                                 Martin Lake 1
                                     100.7
                                      TX
                                       9
                              Antelope Valley B2
                                     89.8
                                      ND
                                      10
                                   Coyote B1
                                     79.9
                                      ND
                                      11
                           H W Pirkey Power Plant 1
                                     71.1
                                      TX
                                      12
                              Antelope Valley B1
                                     69.6
                                      ND
                                      13
                                San Miguel SM-1
                                     64.6
                                      TX
                                      14
                        Sandy Creek Energy Station S01
                                     53.5
                                      TX
                                      15
                                Limestone LIM2
                                     52.5
                                      TX
                                      16
                               Milton R Young B1
                                     52.4
                                      ND
                                      17
                                  Comanche 3
                                     50.3
                                      ND
                                      18
                                 Leland Olds 2
                                     50.1
                                      ND
                                      19
                              James H Miller Jr 3
                                     42.9
                                      AL
                                      20
                                   Labadie 2
                                     42.5
                                      MO

In May 2021, pursuant to authority in section 114 of the CAA, 42 U.S.C. §7414(a), the EPA solicited information related to Hg emissions and Hg control technologies from certain lignite-fired EGUs to inform this CAA section 112(d)(6) technology review. The selected lignite-fired EGUs were asked to provide information on their control configuration for Hg and for other air pollutants (e.g., criteria pollutants such as PM, NOX, SO2). Selected information on lignite-fired EGU control configurations that was obtained from the CAA section 114 information request is shown below in Table 9. Additional information on the location, size (capacity), firing configuration, and control configuration of lignite-fired EGUs (including those few that were not included in the CAA section 114 information request) is also included. The additional information was obtained from the EPA's NEEDS database.  

Most, but not all, of the EGUs utilized a combination of the use of a chemical additive and injection of a sorbent as their Hg control strategy. One facility in North Dakota (Antelope Valley) uses a liquid sorbent that is injected to the SO2 scrubber (spray dryer absorber, SDA). Many of the EGUs used "refined coal." Refined coal is typically produced by mixing proprietary additives to feedstock coal to help capture emissions when the coal is burned. For example, these additives may promote the oxidation of Hg to Hg[2+] compounds for capture in downstream control equipment (e.g., FGD scrubbers, PM control devices). Several of the facilities noted that use of refined coal as a part of their Hg control strategy was discontinued at the end of 2021 when the refined coal production tax credit (created by the American Jobs Creation Act of 2004) expired. According to a U.S. Government Accountability Office audit report, refined coal producers claimed approximately $8.9 billion in tax credits between 2010 and 2020.

            TABLE 9 -- CONTROL CONFIGURATIONS FOR LIGNITE-FIRED EGUS
                                  Plant Name
                                     State
                                 Capacity (MW)
                                    Firing
                                   Control 
                                 Configuration
                            Hg Control Description
                                  Hg Control
                              Antelope Valley #1
                                      ND
                                      450
                                    tangent
                                ACI + SDA + FF
Does not use activated carbon as its sorbent, instead injects a liquid sorbent to the scrubber. The facility stopped using refined coal in December 2021.
Nalco non-carbon, non-halogenated liquid sorbent added to dry scrubber; M-Sorb additive (bromide)
                              Antelope Valley #2
                                      ND
                                      450
                                    tangent
                                ACI + SDA + FF

                                 Coal Creek #1
                                      ND
                                      574
                                    tangent
                               ACI + ESPC + WFGD
               Information not collected in the CAA 114 request
                                 Coal Creek #2
                                      ND
                                      573
                                    tangent
                               ACI + ESPC + WFGD

                                    Coyote
                                      ND
                                      429
                                    cyclone
                                ACI + SDA + FF
               Information not collected in the CAA 114 request
                                Leland Olds #1
                                      ND
                                      222
                                     wall
                           SNCR + ACI + ESPC + WFGD
            Activated carbon and oxidizer injections for Hg control
               ME2C SEA SF10 Oxidizer and SB24 Activated Carbon
                                Leland Olds #2
                                      ND
                                      445
                                    cyclone
                           SNCR + ACI + ESPC + WFGD

                               Milton R Young #1
                                      ND
                                      237
                                    cyclone
                           SNCR + ACI + ESPC + WFGD
Hg controlled by Powdered Activated Carbon Injection plus Oxidizing Agent/Halogen Injection System
  DARCO Hg-H non-halogenated Powdered Activated Carbon + ADA M-Prove additive
                               Milton R Young #2
                                      ND
                                      447
                                    cyclone
                           SNCR + ACI + ESPC + WFGD

                              Spiritwood Station
                                      ND
                                      92
                                      FBC
                             SNCR + ACI + SDA + FF
Hg emissions are controlled by activated carbon injection system and a continuous emissions monitoring system (CEMS). The activated carbon injection feed rate is adjusted to maintain emissions below the 4.0 lb/Tbtu standard.
                   Activated Carbon sorbent (not specified)
                                 Limestone #1
                                      TX
                                      831
                                    tangent
                           SNCR + ACI + ESPC + WFGD
               Information not collected in the CAA 114 request
                                 Limestone #2
                                      TX
                                      858
                                    tangent
                           SNCR + ACI + ESPC + WFGD

                                 Major Oak #1
                                      TX
                                      152
                                      FBC
                      Reagent Injection + SNCR + ACI + FF
Hg is controlled by the introduction of activated carbon into each boiler duct directly in front of the baghouse. A halogen fuel additive is also applied to the lignite before it enters the day silos.
         Cabot DARCO Hg-H non-Brominated AC + ADA-ES M-Prove additive
                                 Major Oak #2
                                      TX
                                      153
                                      FBC
                      Reagent Injection + SNCR + ACI + FF

                                Martin Lake #1
                                      TX
                                      800
                                    tangent
                               ACI + ESPC + WFGD
Brominated additive injected into the furnace and activated carbon injected upstream of the air heater. In 2020 and 2021 Refined Coal System applied an aqueous bromine salt solution to the coal.
           ME2C SEA process (non-Brominated AC + chemical additive)
                                Martin Lake #2
                                      TX
                                      805
                                    tangent
                               ACI + ESPC + WFGD

                                Martin Lake #3
                                      TX
                                      805
                                    tangent
                               ACI + ESPC + WFGD

                                 Oak Grove #1
                                      TX
                                      855
                                    tangent
                             SCR + ACI + FF + WFGD
Brominated activated carbon injected downstream of the air heater. From 2018 to 2021, the unit was equipped with a Refined Coal System for Hg control. This system applied an aqueous bromine salt solution to the coal downstream of the crusher. The refined coal system is no longer in service.
                                 ADA-CS Br-AC
                                 Oak Grove #2
                                      TX
                                      855
                                     wall
                             SCR + ACI + FF + WFGD

                                 Red Hills #1
                                      MS
                                      220
                                      FBC
                         Reagent Injection + ACI + FF
Hg is controlled by injection of activated carbon into each boiler duct directly in front of the baghouse. A fuel additive is also applied to the lignite before it enters the day silos. The application of fuel additives ended in December 2021.
                 ADA-CS non-Br AC + ADA-ES M45 liquid additive
                                 Red Hills #2
                                      MS
                                      220
                                      FBC
                         Reagent Injection + ACI + FF

                                  San Miguel
                                      TX
                                      391
                                     wall
                           SNCR + ACI + ESPC + WFGD
Hg is captured using a sorbent enhanced additive (SEA) injected onto the lignite at the pulverizer feeders or directly into the furnace to promote the oxidation and capture of Hg. This is followed by an ACI system located in the boiler exit duct work upstream of the air heaters. 
The scrubber system also reduces Hg emissions. 
         ME2C SEA process (non-Br AC + powder-based chemical additive)
Note: ACI = activated carbon injection; SDA = spray dryer absorber (dry scrubber); FF = fabric filter; ESPC = cold side electrostatic precipitator; WFGD = wet flue gas desulfurization scrubber; SNCR = selective non-catalytic reduction (NOx control); reagent injection = sorbent injection into fluidized bed combustor

According to fuel use information supplied to EIA (on form 923), 13 of 22 EGUs that were designed to burn lignite utilized refined coal to some extent in 2021, as summarized in Table 10. EIA form 923 does not specify the type of coal that is "refined." For this technology review, the EPA has assumed that the facilities have utilized "refined lignite." However, several "lignite-fired EGUs" located in Texas reported very high use of subbituminous coal in 2021 (ranging from 76 percent up to > 99 percent).

                TABLE 10 -- 2021 FUEL USE AT LIGNITE-FIRED EGUS
                                  Plant Name
                            Distillate Fuel Oil (%)
                                Natural Gas (%)
                               Lignite Coal (%)
                               Refined Coal (%)
                            Subbituminous Coal (%)
                               Antelope Valley 1
                                     0.0%
                                     0.6%
                                     5.8%
                                     93.5%
                                     0.0%
                               Antelope Valley 2
                                     0.0%
                                     0.6%
                                     5.8%
                                     93.5%
                                     0.0%
                                 Coal Creek 1
                                     0.1%
                                     0.0%
                                     0.0%
                                     99.9%
                                     0.0%
                                 Coal Creek 2
                                     0.1%
                                     0.0%
                                     0.0%
                                     99.9%
                                     0.0%
                                   Coyote 1
                                     0.3%
                                     0.0%
                                     99.7%
                                     0.0%
                                     0.0%
                                 Leland Olds 1
                                     0.3%
                                     0.0%
                                     37.6%
                                     62.1%
                                     0.0%
                                 Leland Olds 2
                                     0.3%
                                     0.0%
                                     6.2%
                                     93.6%
                                     0.0%
                               Milton R Young 1
                                     0.4%
                                     0.0%
                                     17.0%
                                     82.6%
                                     0.0%
                               Milton R Young 2
                                     0.2%
                                     0.0%
                                     12.1%
                                     87.6%
                                     0.0%
                             Spiritwood Station 1
                                     0.0%
                                     35.6%
                                     0.0%
                                     64.4%
                                     0.0%
                                  Limestone 1
                                     0.0%
                                     0.2%
                                     0.0%
                                     0.0%
                                     99.8%
                                  Limestone 2
                                     0.0%
                                     0.8%
                                     0.0%
                                     0.0%
                                     99.2%
                               Major Oak Power 1
                                     0.0%
                                     0.2%
                                     99.8%
                                     0.0%
                                     0.0%
                               Major Oak Power 2
                                     0.0%
                                     0.0%
                                    100.0%
                                     0.0%
                                     0.0%
                                 Martin Lake 1
                                     0.1%
                                     0.0%
                                     23.5%
                                     0.0%
                                     76.4%
                                 Martin Lake 2
                                     0.1%
                                     0.0%
                                     22.4%
                                     0.0%
                                     77.5%
                                 Martin Lake 3
                                     0.1%
                                     0.0%
                                     19.2%
                                     0.0%
                                     80.6%
                                  Oak Grove 1
                                     0.0%
                                     1.9%
                                     3.4%
                                     94.7%
                                     0.0%
                                  Oak Grove 2
                                     0.0%
                                     0.0%
                                     3.7%
                                     96.3%
                                     0.0%
                        Red Hills Generating Facility 1
                                     0.0%
                                     0.3%
                                     0.0%
                                     99.7%
                                     0.0%
                        Red Hills Generating Facility 2
                                     0.0%
                                     0.3%
                                     0.0%
                                     99.7%
                                     0.0%
                                 San Miguel 1
                                     0.2%
                                     0.0%
                                     99.8%
                                     0.0%
                                     0.0%

Review of the Hg Emission Standard for Non-Lignite-Fired EGUs
The final MATS Hg emission limit for EGUs firing non-lignite coals (i.e., bituminous and subbituminous coals) is 1.2 lb Hg/TBtu. To review that emission standard, the EPA evaluated the 2021 performance of EGUs firing non-lignite coals and found that EGUs firing primarily bituminous coal emitted Hg at an average annual rate of 0.4 lb Hg/TBtu (with a range of roughly 0.2 to 1.2 lb Hg/TBtu). EGUs firing primarily subbituminous coal in 2021 (not including those EGUs that are permitted to burn lignite but burned a significant amount of subbituminous coal) emitted Hg at an average annual rate of 0.6 lb Hg/TBtu (with a range of 0.1 to 1.2 lb/TBtu). This represents a control range of 98 to 77 percent (assuming an average inlet concentration of 5.5 lb/TBtu). The EPA has information on the control configurations of these non-lignite EGUs but does not have detailed information on the type of sorbent injected (e.g., activated carbon or non-carbonaceous; pre-halogenated, etc.). The EPA also does not have detailed information on the injection rate of sorbents used for Hg control (if any). Similarly, the EPA does not have information on the type of quantity of chemical additives used (if any). However, the bituminous coal-fired EGUs are already achieving an average annual rate of 0.4 lb/TBtu and the subbituminous coal-fired EGUs are already achieving an average annual rate of 0.6 lb/TBtu and a level of control of ranging 77 to 98 percent. The typical Hg control performance curves for sorbent injection show a leveling off such that increasing the amount of sorbent results in diminishing improvement in Hg control. Based on full-scale demonstration testing of Hg sorbents, this leveling off takes place somewhere greater than 90 percent capture. Without knowing the type of sorbent being injected or the rate of the sorbent injection, it is difficult to determine whether additional emissions can be achieved in a cost-effective manner. For bituminous coal-fired EGUs that do not utilize sorbent injection but rely on co-benefit control from equipment installed for criteria pollutants, it is difficult to determine whether additional Hg emission reduction could be obtained in a cost-effective manner with knowledge of the levels of Hg control achieved in each of the installed controls and, if chemical additives are injected, the type and rate of chemical additive injection. For those reasons, the EPA is not proposing to adjust the Hg emission standard for non-lignite-fired EGUs. 

Review of the Hg Emission Standard for Lignite-Fired EGUs
The final MATS Hg emission limit for EGUs firing lignite coal is 4.0 lb Hg/TBtu. To review that emission standard, the EPA evaluated the 2021 performance of lignite-fired EGUs (including those permitted to burn lignite but that utilized significant amounts of subbituminous coal in 2021), shown in Table 11 below. The table shows a "Hg Inlet" level which reflects the maximum Hg content of the range of feedstock coals that the EPA assumes is available to each of the plants in the Integrated Planning Model, IPM, the estimated control (percentage) needed to meet an emission standard of 4.0 lb Hg/TBtu (the current standard for lignite-fired EGUs) and the estimated control (percentage) to meet an emission standard of 1.2 lb Hg/TBtu (the current standard for non-lignite-fired EGUs). The table also shows the estimated 2021 Hg inlet concentration from actual 2021 fuel usage (as mentioned earlier, some units utilized significant quantities of non-lignite fuel, e.g., subbituminous coal, natural gas, etc.) and the 2021 Hg emissions reported to the EPA. The EPA then estimated the apparent level of Hg control for 2021 and the level of control that would been needed to achieve the emission standard applicable to the non-lignite-firing EGUs (1.2 lb Hg/TBtu).
 TABLE 11 -- HG EMISSIONS AND CONTROL PERFORMANCE OF LIGNITE-FIRED EGUS IN 2021
                                       
                                  Plant Name
                              Hg Inlet (lb/TBtu)
                       Est Hg Control at 4.0 lb/Tbtu (%)
                       Est Hg Control at 1.2 lb/TBtu (%)
                          Est 2021 Hg Inlet (lb/TBtu)
                            2021 Hg Outlet (lbTBtu)
                            Est 2021 Hg Control (%)
                    Est 2021 Hg Control at 1.2 lb/TBtu (%)
                              Antelope Valley #1
                                     7.81
                                     48.8
                                     84.6
                                     7.76
                                     2.87
                                     63.0
                                     84.5
                              Antelope Valley #2
                                     7.81
                                     48.8
                                     84.6
                                     7.76
                                     2.74
                                     64.6
                                     84.5
                                 Coal Creek #1
                                     7.81
                                     48.8
                                     84.6
                                     7.80
                                     3.62
                                     53.6
                                     84.6
                                 Coal Creek #2
                                     7.81
                                     48.8
                                     84.6
                                     7.80
                                     3.89
                                     50.2
                                     84.6
                                    Coyote
                                     7.81
                                     48.8
                                     84.6
                                     7.79
                                     3.17
                                     59.2
                                     84.6
                                Leland Olds #1
                                     7.81
                                     48.8
                                     84.6
                                     7.79
                                     2.51
                                     67.8
                                     84.6
                                Leland Olds #2
                                     7.81
                                     48.8
                                     84.6
                                     7.79
                                     3.02
                                     61.3
                                     84.6
                               Milton R Young #1
                                     7.81
                                     48.8
                                     84.6
                                     7.78
                                     3.23
                                     58.4
                                     84.6
                               Milton R Young #2
                                     7.81
                                     48.8
                                     84.6
                                     7.79
                                     3.20
                                     58.9
                                     84.6
                              Spiritwood Station
                                     7.81
                                     48.8
                                     84.6
                                     5.03
                                     1.86
                                     63.1
                                     76.1
                                       
                                       
                                       
                                       
                                       
                                       
                                       
                                       
                                 Limestone #1
                                     14.88
                                     73.1
                                     91.9
                                     6.24
                                     0.94
                                     84.9
                                     80.8
                                 Limestone #2
                                     14.88
                                     73.1
                                     91.9
                                     6.20
                                     1.59
                                     74.4
                                     80.7
                                 Major Oak #1
                                     14.65
                                     72.7
                                     91.8
                                     14.62
                                     1.24
                                     91.5
                                     91.8
                                 Major Oak #2
                                     14.65
                                     72.7
                                     91.8
                                     14.65
                                     1.31
                                     91.1
                                     91.8
                                Martin Lake #1
                                     14.65
                                     72.7
                                     91.8
                                     8.22
                                     2.32
                                     71.8
                                     85.4
                                Martin Lake #2
                                     14.65
                                     72.7
                                     91.8
                                     8.13
                                     2.99
                                     63.2
                                     85.2
                                Martin Lake #3
                                     14.65
                                     72.7
                                     91.8
                                     7.85
                                     3.04
                                     61.3
                                     84.7
                                 Oak Grove #1
                                     14.88
                                     73.1
                                     91.9
                                     14.60
                                     2.01
                                     86.2
                                     91.8
                                 Oak Grove #2
                                     14.88
                                     73.1
                                     91.9
                                     14.88
                                     2.59
                                     82.6
                                     91.9
                                 Red Hills #1
                                     12.44
                                     67.8
                                     90.4
                                     12.40
                                     1.33
                                     89.3
                                     90.3
                                 Red Hills #2
                                     12.44
                                     67.8
                                     90.4
                                     12.40
                                     1.35
                                     89.1
                                     90.3
                                  San Miguel
                                     14.65
                                     72.7
                                     91.8
                                     14.62
                                     2.81
                                     80.8
                                     91.8

As can be seen in the table, all lignite-fired EGUs are estimated to meet the current standard by achieving a level of control of less than 75 percent. The average reported 2021 Hg emission rate for lignite-fired EGUs located in North Dakota was 3.0 lb Hg/TBtu with an average control of 83.7 percent. The average reported 2021 Hg emission rate for lignite-fired EGUs located in Texas and Mississippi was 2.0 lb Hg/TBtu (with an average control of 88.2 percent). 

Determination of an Achievable Hg Emission Standard for Lignite-Fired EGUs
After reviewing the available literature and other studies and available information, the assumptions made regarding Hg control in the final MATS rule, and the information obtained from compliance reports and the 2022 CAA section 114 information collection, the EPA has determined that there are available controls and methods of operation that will allow lignite-fired EGUs to meet an Hg emission standard of 1.2E-06 lb/MMBtu, which is the same emission standard that is being met by EGUs firing on non-lignite coals
 Both Lignite and Subbituminous Coal are Low Rank Coals with Low Halogen Content
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on heating value of the coal. Anthracite has the highest heating value of all ranks of coal and is mostly used by the metals industry (it is rarely using for power production). Anthracite accounted for less than 1 percent of the coal mined in the U.S. in 2021. Bituminous coal is also considered a "high rank coal" because of its higher heating value. It is the most abundant rank of domestic coal and accounted for about 45 percent of total U.S. coal production in 2021. Bituminous coal is used to generate electricity and in other industries.

Subbituminous coal and lignite are referred to as "low rank coals". They both have lower heating values than bituminous coal. Subbituminous coal accounted for about 46 percent of total U.S. coal production in 2021, with the vast majority produced in the Powder River Basin (PRB) of Wyoming and Montana. Lignite has the lowest energy content of all coal ranks. Lignite accounted for about 8 percent of total U.S. coal production in 2021. About 56 percent was mined in North Dakota (Fort Union lignite) and about 36 percent was mined in Texas (Gulf Coast lignite).
Chlorine is the most abundant halogen in coal. Bromine may also be present in coal but is typically in much lower concentrations than chlorine. Low-rank coals such as lignite and subbituminous generally have lower chlorine contents than higher rank coals such as bituminous coal.
As mentioned earlier, the halogen content of the coal  --  especially chlorine  --  largely influences the oxidation state of Hg in the flue gas stream. As a result, the halogen content of the coal directly influences the ability to capture and contain the Hg before it is emitted into the atmosphere. As explained earlier, ash from lignite and subbituminous coals tends to be more alkaline (relative to that from bituminous coal) due to the lower amounts of sulfur and halogen and the presence of a more alkaline and reactive (non-glassy) form of calcium in the ash. The natural alkalinity of the subbituminous and lignite fly ash can effectively neutralize the limited free halogen in the flue gas and prevent oxidation of the Hg[0]. This makes control of Hg from both subbituminous coal-fired EGUs and lignite-fired EGUs more challenging than the control of Hg from bituminous coal-fired EGUs. However, because control strategies and technologies were developed to introduce halogens to the flue gas stream, EGUs firing subbituminous coals have been able to meet the 1.2 lb/TBtu emission standard in the final MATS rule. As mentioned earlier, EGUs firing subbituminous coal in 2021 emitted Hg at an average annual rate of 0.6 lb Hg/TBtu with measured values as low as 0.1 lb/TBtu. Clearly EGUs firing subbituminous coal have found control options to demonstrate compliance with the 1.2 lb/TBtu emission standard despite the challenges presented by the low natural halogen content of the coal and production of difficult-to-control elemental Hg vapor in the flue gas stream.
The Hg Content of North Dakota Lignite and PRB Subbituminous Coal are Similar
As can be seen in Table 11 above, for the final MATS rule, the EPA estimated the North Dakota lignite-fired EGUs inlet Hg concentration at up to 7.8 lb/TBtu and estimated the inlet Hg concentration of subbituminous coal-fired EGUs at up to 8.65 lb/TBtu. These values are very similar to results from a published study that found the average Hg concentration of North Dakota lignite and PRB subbituminous coals to be very similar. The study found that the North Dakota lignite samples contained an average of 8.5 lb/TBtu and the PRB subbituminous coal samples contained an average of 7.5 lb/TBtu. Despite the similarities in Hg content, halogen content, and alkalinity between North Dakota lignite and PRB subbituminous coal, EGUs firing subbituminous coal in 2021 emitted Hg at an average annual rate of 0.6 lb Hg/TBtu while those firing on North Dakota lignite emitted Hg at an average annual rate of 3.0 lb Hg/TBtu. While the EGUs firing North Dakota lignite at an average emission rate of 3.0 lb Hg/TBtu are complying with the final MATS emission standard of 4.0 lb Hg/TBtu, it is difficult to explain why those units could not meet a similar level of Hg control as that of the EGUs firing PRB subbituminous coal given the similarities between the two fuels  -  especially the similarities in Hg content, halogen content, and alkalinity. 
The Hg content of Gulf Coast lignite tends to be higher than that of the North Dakota lignite. As can be seen in Table 11 above, for the final MATS rule, the EPA estimated the inlet Hg concentration for Gulf Coast lignite-fired EGUs at an average inlet Hg concentration of up to 14.9 lb/TBtu (as compared to average inlet Hg concentrations of up to 7.8 lb/TBtu for North Dakota lignite). Despite the higher Hg content, EGUs permitted as lignite-fired had, in 2021, an average Hg emission rate of 2.0 lb/TBtu  -  below the 2021 average emission rate of EGUs firing North Dakota lignite (at 3.0 lb/TBtu). This is due, in part, because some EGUs in Texas that are permitted as lignite-fired units (and thus subject to the Hg emission standard of 4.0 lb/TBtu) were, in 2021, firing significant amounts of subbituminous coal. Firing high levels of non-lignite coal (in some cases greater than 99 percent non-lignite coal), while remaining subject to the less stringent Hg emission standard for the subcategory of lignite-fired EGUs seems to fit the scenario that the EPA expressed concern about in the final MATS rule preamble  -  that "sources to potentially meet the definition by combusting very small amounts of low rank virgin coal [lignite]". See 77 FR 9379.
Cost of Meeting the Revised Emission Standard
For the final MATS rule, the EPA calculated beyond-the-floor costs for Hg controls by assuming injection of brominated activated carbon at a rate of 3.0 lb/MMacf for units with ESPs and injection rates of 2.0 lb/MMacf for units with baghouses (also known as FF). Yet, in responses to the CAA section 114 information survey, only one facility (Oak Grove) explicitly indicated use of brominated activated carbon. Oak Grove units #1 and #2 (both using FF for PM control) reported use of brominated activated carbon at an average injection rate of less than 0.5 lb/MMacf for operation at capacity factor greater than 70 percent. The Oak Grove units fired, in 2021, using mostly refined coal. That injection rate is considerably less than the 2.0 lb/MMacf assumed. 
From the CAA 114 information survey, the average injection rate reported for non-halogenated sorbents was 2.5 lb/MMacf. The average sorbent injection rate ranged from 10  -  65 percent of the maximum design sorbent injection rate (the average was 36 percent of the maximum design rate). As mentioned earlier, most sources utilized a control strategy of sorbent injection coupled with chemical (usually halogenated) additives. In the beyond-the-floor analysis in the final MATS rule, we noted that the results from various demonstration projects suggest that greater than 90 percent Hg control can be achieved at lignite-fired units using brominated activated carbon sorbent at an injection rate of 2.0 lb/MMacf for units with installed FFs for PM control and at an injection rate of 3.0 lb/MMacf for units with installed ESPs for PM control. As shown in Table 11 above, all units (in 2021) would have needed to control their Hg emissions to less than 92 percent to meet an emission standard of 1.2 lb/TBtu. Based on this, we expect that the units could meet the proposed, more stringent, emission standard of 1.2 lb/TBtu by utilizing brominated activated carbon at the injection rates suggested in the beyond-the-floor memo from the final MATS rule. 
 Cost-effectiveness for a Model Plant
To determine the cost-effectiveness of that strategy, we calculated the incremental cost-effectiveness (cost per lb of Hg controlled) for a model 800 MW lignite-fired EGU. We calculated the incremental cost of injecting non-brominated activated carbon sorbent at a conservative injection rate of 5.0 lb/MMacf to achieve an emission rate of 1.2 lb/TBtu versus the cost to meet an emission rate of 4.0 lb/TBtu using non-brominated activated carbon sorbent at an emission rate of 2.5 lb/MMacf.  
This calculation assumes a model 800 MW EGU with a heat rate of 11,000 Btu/kWh operating at an 80 percent capacity factor fires Gulf Coast lignite with a Hg concentration of 14.9 lb/TBtu. It also assumes that the unit meets a Hg emission standard of 4.0 lb/TBtu using an injection rate of 2.5 lb/MMacf of non-brominated activated carbon at a sorbent cost of $0.80/lb and that the unit can meet a Hg emission standard of 1.2 lb/TBtu using an injection rate of 5.0 lb/MMacf of brominated activated carbon at a sorbent cost of $1.15/lb.  

800 MW x 8760 hryearx80% CF=5,606,400 MWhyear
5,606,400 MWhyear x 11 mmBtuMWh =61,670,400 mmBtuyear=8,880 mmBtuhr
61,670,400 mmBtuyear x 14.9 x 106 lb HgmmBtu=919 lb Hg inyear 
At an emission standard of 4.0 lb HgTBtu=247 lb Hgyear emitted (73% control)
2.5 lb sorbentMMacfx 9860scfmmBtux 520 R785 R x 8,880 mmBtuhr x 1 MMacf1,000,000 acf= 144 lb sorbenthr
Sorbent cost= 144 lbhr x 8760 hryear x 80% CF x $0.80lb=$807,322 per year
At an emission standard of 1.2 lb HgTBtu=74 lb Hgyear emitted (92% control)
5.0 lb sorbentMMacfx 9860scfmmBtux 520 R785 R x 8,880 mmBtuhr x 1 MMacf1,000,000 acf= 287 lb sorbenthr
Sorbent cost= 287 lbhr x 8760 hryear x 80% CF x $1.15lb=$2,312,990 per year
Incremental cost effectiveness= $2,312,990-$807,322845- 672 lb Hg controlled =$8,703 per lb Hg removed
This is a conservative value as it is unlikely that sources will need to inject brominated activated carbon sorbent at rates as high as 5.0 lb/MMacf (the Oak Grove units were injecting less than 0.5 lb/MMacf) and is well below the cost that the EPA has found to be acceptable in previous rulemakings. The EPA also calculated unit-level cost-effectiveness to meet the unit's 2021 emission level (shown in Table 12) and to meet the revised, more stringent, emission standard using brominated activated carbon at an injection rate of 5.0 lb/MMacf for units with an ESP for PM control or at an injection rate of 2.5 lb/MMacf for units with FF for PM control (shown in Table 13). In estimating the unit's 2021 cost-effectiveness, the EPA assumed the annual cost of chemical additives to be equivalent to that of annual sorbent costs and the estimated cost-effectiveness ranged from <$1,000 per pound of Hg removed to $13,776 per pound of mercury. The unit level cost-effectiveness to meet the more stringent ranged from $1,675 per pound of Hg controlled to $11,589 per pound of Hg controlled. Each of these calculations is conservative as many EGUs indicated that they have stopped using chemically treated coal (i.e., "refined coal") after the tax credit expired in December 2021. In any case, all calculated cost-effectiveness values are lower than the value ($27,016 per pound of Hg controlled) that was projected in the beyond-the-floor analysis for the final 2012 MATS final rule.

TABLE 12. ESTIMATED COST-EFFECTIVENESS FOR CONTROL OF MERCURY IN 2021 AT LIGNITE-FIRED EGUS 
                                  Plant Name
                                  PM Control
                            Est Hg Inlet (lb/Tbtu)
                                Est Hg In (lb)
                               2021 Hg (lb/Tbtu)
                                Est Hg Out (lb)
                       Avg Sorbent injection (lb/mmacf)
                              Avg Sorbent (lb/hr)
                            Sorbent Cost ($/lb) **
                          Est 2021 Sorbent Used (lb)
                           Est 2021 Sorbent Cost ($)
                         Est 2021 Additive Cost ($) *
                                2021 C/E ($/lb)
                             Spiritwood Station 1
                                      FF
                                     5.03
                                     21.3
                                      1.9
                                      7.9
                                      4.0
                                     13.2
                                     $0.83
                                      111,662 
                                    $92,680
                                    $92,680
                                    $13,776
                                 Leland Olds 1
                                     ESPC
                                     7.79
                                     91.8
                                      2.5
                                     29.6
                                      3.9
                                     45.0
                                     $0.97
                                      299,689 
                                   $290,699
                                   $290,699
                                    $9,343
                                 Leland Olds 2
                                     ESPC
                                     7.79
                                     142.2
                                      3.0
                                     55.1
                                      2.5
                                     55.0
                                     $0.97
                                      294,762 
                                   $285,919
                                   $285,919
                                    $6,563
                               Milton R Young 2
                                     ESPC
                                     7.79
                                     130.1
                                      3.2
                                     53.5
                                      1.6
                                     43.0
                                     $0.83
                                      177,431 
                                   $147,267
                                   $147,267
                                    $3,844
                               Milton R Young 1
                                     ESPC
                                     7.78
                                     255.5
                                      3.2
                                     106.2
                                      1.3
                                     19.0
                                     $0.83
                                      273,988 
                                   $227,410
                                   $227,410
                                    $3,046
                               Major Oak Power 1
                                      FF
                                     14.62
                                     193.6
                                      1.2
                                     16.4
                                      1.9
                                       -
                                     $0.83
                                      161,759 
                                   $134,260
                                   $134,260
                                    $1,515
                               Major Oak Power 2
                                      FF
                                     14.65
                                     207.0
                                      1.3
                                     18.5
                                      1.9
                                       -
                                     $0.83
                                      172,603 
                                   $143,261
                                   $143,261
                                    $1,519
                        Red Hills Generating Facility 1
                                      FF
                                     12.40
                                     192.7
                                      1.3
                                     20.7
                                      2.6
                                     36.0
                                     $0.76
                                      259,600 
                                   $197,296
                                   $197,296
                                    $2,293
                        Red Hills Generating Facility 2
                                      FF
                                     12.40
                                     209.4
                                      1.4
                                     22.9
                                      2.4
                                     36.0
                                     $0.76
                                      262,834 
                                   $199,754
                                   $199,754
                                    $2,141
                                  Oak Grove 1
                                      FF
                                     14.60
                                     980.0
                                      2.0
                                     134.9
                                      0.1
                                      8.0
                                     $1.15
                                        65,331 
                                    $75,131
                                    $75,131
                                     $178
                                 Martin Lake 1
                                     ESPC
                                     8.22
                                     392.7
                                      2.3
                                     111.0
                                      1.0
                                     39.0
                                     $0.97
                                      313,150 
                                   $303,755
                                   $303,755
                                    $2,156
                                  Oak Grove 2
                                      FF
                                     14.88
                                     887.2
                                      2.6
                                     154.2
                                      0.3
                                     17.0
                                     $1.15
                                      126,484 
                                   $145,456
                                   $145,456
                                     $397
                                 San Miguel 1
                                     ESPC
                                     14.62
                                     346.6
                                      2.8
                                     66.7
                                      2.7
                                     59.5
                                     $0.97
                                      418,050 
                                   $405,509
                                   $405,509
                                    $2,897
                                 Martin Lake 2
                                     ESPC
                                     8.13
                                     331.1
                                      3.0
                                     121.7
                                      3.0
                                     117.0
                                     $0.97
                                      809,959 
                                   $785,660
                                   $785,660
                                    $7,504
                                 Martin Lake 3
                                     ESPC
                                     7.85
                                     372.8
                                      3.0
                                     144.1
                                      3.4
                                     126.0
                                     $0.97
                                    1,046,260 
                                  $1,014,872
                                  $1,014,872
                                    $8,877
   * Additive costs are unknown. For this analysis, the EPA assumed the additive costs are the same, annually, as the sorbent costs.
   ** Bolded costs are those that were provided to the EPA in the 2022 CAA section 114 information survey

TABLE 13. ESTIMATED COST-EFFECTIVENESS TO MEET A REVISED MERCURY OF 1.2 LB/TBTU AT LIGNITE-FIRED EGUS (ASSUMING 2021 OPERATIONAL CHARACTERISICS)
                                  Plant Name
                                  PM Control
                            Est Hg Inlet (lb/Tbtu)
                                Est Hg In (lb)
                                  Hg Out (lb)
                            Br-ACI rates (lb/Mmacf)
                          Est Br-AC Sorbent Used (lb)
                                Br-AC cost ($)
                   C/E ($/lb) assuming no chemical additives
                C/E ($/lb) assuming previous chemical additives
                             Spiritwood Station 1
                                      FF
                                     5.03
                                     21.3
                                        5.09 
                                      3.0
                                        83,123 
                                    $95,592
                                    $5,884
                                    $11,589
                                 Leland Olds 1
                                     ESPC
                                     7.79
                                     91.8
                                       14.15 
                                      5.0
                                      385,175 
                                   $442,951
                                    $5,702
                                    $9,444
                                 Leland Olds 2
                                     ESPC
                                     7.79
                                     142.2
                                       21.90 
                                      5.0
                                      595,945 
                                   $685,337
                                    $5,695
                                    $8,071
                               Milton R Young 2
                                     ESPC
                                     7.79
                                     130.1
                                       20.05 
                                      5.0
                                      545,753 
                                   $627,616
                                    $5,702
                                    $7,040
                               Milton R Young 1
                                     ESPC
                                     7.78
                                     255.5
                                       39.42 
                                      5.0
                                    1,072,786 
                                  $1,233,703
                                    $5,709
                                    $6,761
                               Major Oak Power 1
                                      FF
                                     14.62
                                     193.6
                                       15.89 
                                      3.0
                                      259,507 
                                   $298,433
                                    $1,679
                                    $2,434
                               Major Oak Power 2
                                      FF
                                     14.65
                                     207.0
                                       16.96 
                                      3.0
                                      276,903 
                                   $318,439
                                    $1,675
                                    $2,429
                        Red Hills Generating Facility 1
                                      FF
                                     12.40
                                     192.7
                                       18.65 
                                      3.0
                                      304,496 
                                   $350,170
                                    $2,011
                                    $3,145
                        Red Hills Generating Facility 2
                                      FF
                                     12.40
                                     209.4
                                       20.26 
                                      3.0
                                      330,893 
                                   $380,526
                                    $2,011
                                    $3,067
                                  Oak Grove 1
                                      FF
                                     14.60
                                     980.0
                                       80.56 
                                      3.0
                                    1,315,485 
                                  $1,512,808
                                    $1,682
                                    $1,765
                                 Martin Lake 1
                                     ESPC
                                     8.22
                                     392.7
                                       57.35 
                                      5.0
                                    1,560,741 
                                  $1,794,852
                                    $5,352
                                    $6,257
                                  Oak Grove 2
                                      FF
                                     14.88
                                     887.2
                                       71.55 
                                      3.0
                                    1,168,333 
                                  $1,343,583
                                    $1,647
                                    $1,826
                                 San Miguel 1
                                     ESPC
                                     14.62
                                     346.6
                                       28.45 
                                      5.0
                                      774,167 
                                   $890,292
                                    $2,798
                                    $4,073
                                 Martin Lake 2
                                     ESPC
                                     8.13
                                     331.1
                                       48.90 
                                      5.0
                                    1,330,919 
                                  $1,530,557
                                    $5,423
                                    $8,207
                                 Martin Lake 3
                                     ESPC
                                     7.85
                                     372.8
                                       56.99 
                                      5.0
                                    1,550,850 
                                  $1,783,478
                                    $5,647
                                    $8,861

Review of Acid Gas Emission Limits

As described in section III of the preamble, EGUs in six subcategories are subject to numeric emission limits for acid gas HAP (e.g., HCl, HF). Emission standards for HCl serve as a surrogate for the acid gas HAP, with an alternate standard for SO2 that may be used as a surrogate for acid gas HAP at coal-fired EGUs with operational FGD systems and SO2 CEMS.
For coal-fired EGUs, the acid gas HAP emission standard is 2.0E-03 lb HCl/MMBtu and the alternative SO2 emission standard is 2.0E-01 lb SO2/MMBtu.

When the EPA finalized the 2012 MATS rule, the primary air pollution control devices installed at EGUs for the control of acid gases were WS (wet FGD), dry scrubbers (dry FGD or spray dryer absorber, SDA), and reagent injection (at fluidized bed combustors). These technologies are still in wide use currently for acid gas HAP control. An additional acid gas control technology  - DSI  -  was in limited use in the power sector at the time the MATS rule was finalized but has seen increased use since (approximately 20 percent of EGUs operating in 2021 utilized DSI for acid gas control for one reason or another). 

A wet FGD scrubber uses an alkaline liquid slurry (usually a limestone or lime
slurry) to remove acidic gases from an exhaust stream. The acid gases react with the alkaline compounds in the slurry is removed as scrubber solids (e.g., CaSO3 or CaSO4) or may be captured due to their solubility in the scrubber slurry. Most wet FGD scrubbers have SO2 removal efficiencies exceeding 90 percent and perform even better for HCl. 

Dry FGD scrubbers (SDA) are an acid gas pollution control system where an alkaline sorbent slurry is injected into the flue gas stream to react with and neutralize acid gases in the exhaust stream forming a dry powder material which is then captured in a downstream PM control device (usually a FF).

Alkaline sorbent injection systems (reagent injection) are also used in fluidized bed combustors (FBC) and circulating fluidized bed (CFB) boilers for control of acid gases. In that use, the alkaline sorbent (usually powered limestone) is injected into the combustion chamber with the primary fuel.

DSI is an add-on air pollution control system in which a dry alkaline powdered sorbent (typically sodium- or calcium-based) is injected into the flue gas steam upstream of a PM control device to react with and neutralize acid gases in the exhaust stream forming a dry powder material that may be removed in a primary or secondary PM control device.

The EPA evaluated the use of these control technologies (wet FGD scrubbers, SDA, reagent injection, and DSI), and the strategic use of low sulfur or low halogen fuels. 

The EPA reviewed compliance data for SO2 and/or HCl as shown in Figure 3 below  -  showing EGUs with highest SO2 emissions in 2021 to those with the lowest SO2 emissions in 2021. Approximately two-thirds of coal-fired EGUs have demonstrated compliance with the alternative SO2 emission standard rather than the HCl emission limit. Those units are shown on the plot in Figure 3 as the blue data points below the red line indicating the MATS SO2 emission limit of 0.20 lb/MMBtu. About one-third of EGUs have demonstrated compliance with the primary acid gas emission limit for HCl. And some sources have reported emissions data that demonstrates compliance with either of the standards. Emission rates for HCl are shown in Figure 3 as green data points for EGUs that utilize some sort of acid gas control system  -  which would be a wet FGD scrubber, a dry scrubber (an SDA), reagent injection or DSI. The purple datapoints on the plot in Figure 3 represent HCl emission rates for units that do not have a wet FGD scrubber or an SDA and do not utilize either reagent injection or DSI. All of those EGUs with no acid gas controls are units that were firing subbituminous coal and were able to demonstrate compliance with the HCl emission standard due to the low natural chlorine content and high alkalinity of most subbituminous coals.

 FIGURE 3 --  SO2 AND HCL EMISSION RATES FOR COAL-FIRED EGUS OPERATING IN 2021
All sources submit SO2 emissions data to comply with other CAA requirements (e.g., the Acid Rain Program). As mentioned earlier, some sources submitted emissions data that demonstrates compliance with either the HCl standard or the alternative SO2 standard. The average SO2 emission rate for units at or below the alternative SO2 emission limit was 0.09 lb SO2/MMBtu, which is approximately 55 percent below the SO2 emission limit of 0.20 lb SO2/MMBtu. The average HCl emission rate for units demonstrating compliance with the SO2 standard but also reporting HCl emissions was 0.0004 lb HCl/MMBtu, which is approximately 80 percent of the HCl emission limit of 0.002 lb HCl/MMBtu. This is consistent with the EPA's rationale for establishing the alternative SO2 emission limit  -  because HCl emissions are more easily controlled than SO2 (it is more reactive and more soluble), controlling emissions of SO2 using FGD controls effectively controls emissions of HCl. Note that an EGU may demonstrate compliance with the acid gas surrogate SO2 standard if the unit has some type of installed acid gas control and an operational SO2 CEMS.
The EPA looked further at the HCl emissions of the EGUs operating in 2021 with and without acid gas controls, as shown in Figure 4 below. The average HCl emission rate of EGUs with some sort of add-on acid gas control (a wet FGD scrubber, a dry scrubber (SDA), reagent injection, or DSI) was 0.0004 lb HCl/MMBtu, which is 80 percent below the HCl emission limit and is the same average HCl emission rate as that of EGUs demonstrating compliance with the alternative SO2 emission rate (which emphasizes even further that HCl is easier to control than SO2). Interestingly, the average emission rate of EGUs with no add-on acid gas control was 0.0008 lb HCl/MMBtu, which is 60 percent below the SO2 emission limit.

FIGURE 4 -- HCL EMISSION RATES FOR COAL-FIRED EGUS WITH AND WITHOUT ACID GAS CONTROLS THAT WERE OPERATING IN 2021
The EPA looked closer at the relative performance of acid gas controls for HCl emissions as shown in Figure 5  -  showing the HCl emission rates for EGUs operating in 2021 with some sort of acid gas controls installed and demonstrating compliance with the HCl emission standard. Figure 5 shows the performance curve of those EGUs with the units distinguished by the type of acid gas controls  -  blue data points for units with installed dry scrubbers (SDA), red data points for units with installed wet FGD scrubbers, and green data points for units that used some sort of sorbent injection (either injected into a fluidized boiler or as a downstream DSI system). The best performing EGUs tend to be those that utilize either wet or dry FGD scrubbers, with units utilizing sorbent injection emitting at slightly higher rates. The units that utilize DSI with an FF tend to have lower HCl emissions than those that utilized DSI with an ESP. This is an expected outcome as the filter cake on the FF provides great opportunity for contact with the gas phase acid gases.  

FIGURE 5 --  HCL EMISSION RATES FOR COAL-FIRED EGUS WITH ACID GAS CONTROLS THAT WERE OPERATING IN 2021 AND DEMONSTRATING COMPLIANCE WITH THE HCL EMISSION STANDARD

Overall, the EPA has evaluated acid gas emissions data from MATS-affected EGUs and has determined that some units have demonstrated compliance with the primary HCl emission standard using acid gas control technologies (wet FGD scrubbers, SDA, reagent injection, and DSI) and through the strategic use of low-halogen, high-alkalinity fuels. Other units have demonstrated compliance with acid gas emission limits using the alternative SO2 emission standard. The EPA has not identified any new control technologies or any improvements to existing acid gas controls that would result in cost-effective acid gas HAP emission reductions. The average HCl emission rates for units with add-on acid gas controls was 0.0004 lb HCl/MMBtu which is approximately 80 percent below the MATS HCl emission limit. The average HCl emission rate for units with add-on acid gas controls was 0.0004 lb HCl/MMBtu which is approximately 80 percent below the MATS HCl emission limit. The average HCl emission rate for units with no add-on acid gas controls was 0.0008 lb HCl/MMBtu (approximately 60 percent below the MATS HCl emission limit). It is not clear that improvements in a wet or dry FGD scrubber would result in additional HCl emission reductions since HCl emissions are already much easier to control than SO2 emissions. The EPA does not have information on the injection rates for DSI systems; so, we cannot assess whether increased sorbent injection rates would result in additional HCl emission reductions. Units using DSI in combination with an ESP would almost certainly see improved performance if they were to replace the ESP with a FF. However, that small incremental reduction in HCl emissions would come at a high cost and would certainly not be a cost-effective option.

       Appendix A
                                   Unique ID
                                  Plant Name
                                    Min Max
                                   Min 99th
                                   Min 90th
                                   Min 85th
                                   Min 80th
                                   Min 75th
                                   Min 50th
6076_B_4
Colstrip
                                                                       2.70E-02
                                                                       2.10E-02
                                                                       2.10E-02
                                                                       2.00E-02
                                                                       2.00E-02
                                                                       2.00E-02
                                                                       1.90E-02
10343_B_SG-101
Foster Wheeler Mt Carmel Cogen
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
6076_B_3
Colstrip
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.80E-02
                                                                       1.70E-02
2103_B_2
Labadie
                                                                       1.80E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.60E-02
                                                                       1.60E-02
2103_B_1
Labadie
                                                                       1.80E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.60E-02
                                                                       1.60E-02
2103_B_4
Labadie
                                                                       1.80E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.60E-02
                                                                       1.60E-02
2103_B_3
Labadie
                                                                       1.80E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.60E-02
                                                                       1.60E-02
976_B_123
Marion
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.70E-02
                                                                       1.60E-02
                                                                       1.60E-02
                                                                       1.60E-02
                                                                       1.50E-02
10113_B_CFB1, 10113_B_CFB2
John B Rich Memorial Power Station
                                                                       1.60E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.40E-02
6823_B_W1
D B Wilson
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       9.00E-03
50611_B_031
Westwood Generation LLC
                                                                       1.50E-02
                                                                       1.50E-02
                                                                       1.40E-02
                                                                       1.40E-02
                                                                       1.40E-02
                                                                       1.40E-02
                                                                       1.30E-02
6146_B_1
Martin Lake
                                                                       1.40E-02
                                                                       1.40E-02
                                                                       1.40E-02
                                                                       1.30E-02
                                                                       1.30E-02
                                                                       1.30E-02
                                                                       1.20E-02
6041_B_3
H L Spurlock
                                                                       1.20E-02
                                                                       1.20E-02
                                                                       1.20E-02
                                                                       1.10E-02
                                                                       1.00E-02
                                                                       9.20E-03
                                                                       8.00E-03
3954_B_3
Mt Storm
                                                                       1.20E-02
                                                                       1.20E-02
                                                                       1.20E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
6146_B_3
Martin Lake
                                                                       1.20E-02
                                                                       1.20E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.00E-02
1082_B_3
Walter Scott Jr Energy Center
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.00E-02
3954_B_1, 3954_B_2
Mt Storm
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
1893_B_4
Clay Boswell
                                                                       1.10E-02
                                                                       1.10E-02
                                                                       9.00E-03
                                                                       8.10E-03
                                                                       7.90E-03
                                                                       7.70E-03
                                                                       7.20E-03
10143_B_ABB01
Colver Power Project
                                                                       1.10E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
54634_B_1
St Nicholas Cogen Project
                                                                       1.50E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       9.90E-03
                                                                       9.70E-03
                                                                       9.00E-03
8102_B_1
Gavin Power, LLC
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       9.60E-03
2823_B_B2
Milton R Young
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
                                                                       1.00E-02
6018_B_2
East Bend
                                                                       1.20E-02
                                                                       9.90E-03
                                                                       9.80E-03
                                                                       9.60E-03
                                                                       9.60E-03
                                                                       9.50E-03
                                                                       8.20E-03
6113_B_3
Gibson
                                                                       9.90E-03
                                                                       9.80E-03
                                                                       9.50E-03
                                                                       9.50E-03
                                                                       9.30E-03
                                                                       8.80E-03
                                                                       7.70E-03
6065_B_2
Iatan
                                                                       9.00E-03
                                                                       9.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       7.00E-03
                                                                       6.00E-03
645_B_BB04
Big Bend
                                                                       6.20E-02
                                                                       9.00E-03
                                                                       6.00E-03
                                                                       5.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       1.00E-03
6068_B_3
Jeffrey Energy Center
                                                                       9.00E-03
                                                                       9.00E-03
                                                                       8.80E-03
                                                                       8.60E-03
                                                                       8.50E-03
                                                                       8.40E-03
                                                                       7.80E-03
6177_B_U2B
Coronado
                                                                       8.70E-03
                                                                       8.60E-03
                                                                       8.30E-03
                                                                       8.00E-03
                                                                       7.90E-03
                                                                       7.90E-03
                                                                       7.60E-03
6177_B_U1B
Coronado
                                                                       8.70E-03
                                                                       8.60E-03
                                                                       8.30E-03
                                                                       8.00E-03
                                                                       7.90E-03
                                                                       7.90E-03
                                                                       7.60E-03
6183_B_SM-1
San Miguel
                                                                       8.20E-03
                                                                       8.20E-03
                                                                       8.10E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       7.90E-03
                                                                       7.70E-03
6705_B_4
Warrick
                                                                       9.00E-03
                                                                       8.20E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.00E-03
                                                                       4.00E-03
628_B_5
Crystal River
                                                                       8.20E-03
                                                                       8.10E-03
                                                                       8.10E-03
                                                                       8.00E-03
                                                                       7.90E-03
                                                                       7.80E-03
                                                                       7.50E-03
628_B_4
Crystal River
                                                                       8.20E-03
                                                                       8.10E-03
                                                                       8.10E-03
                                                                       8.00E-03
                                                                       7.90E-03
                                                                       7.80E-03
                                                                       7.50E-03
1356_B_2, 1356_B_3
Ghent
                                                                       8.10E-03
                                                                       8.10E-03
                                                                       8.00E-03
                                                                       7.70E-03
                                                                       7.60E-03
                                                                       7.50E-03
                                                                       7.30E-03
6146_B_2
Martin Lake
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       7.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.00E-03
6180_B_1
Oak Grove (TX)
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.00E-03
                                                                       5.00E-03
6204_B_2
Laramie River Station
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
                                                                       8.00E-03
136_B_2
Seminole (FL)
                                                                       1.00E-02
                                                                       8.00E-03
                                                                       7.80E-03
                                                                       7.70E-03
                                                                       7.60E-03
                                                                       7.50E-03
                                                                       7.00E-03
2364_B_1, 2364_B_2
Merrimack
                                                                       7.90E-03
                                                                       7.90E-03
                                                                       7.50E-03
                                                                       7.30E-03
                                                                       7.10E-03
                                                                       7.00E-03
                                                                       6.00E-03
1393_B_6
R S Nelson
                                                                       7.90E-03
                                                                       7.90E-03
                                                                       7.60E-03
                                                                       7.60E-03
                                                                       7.60E-03
                                                                       7.60E-03
                                                                       7.50E-03
8066_B_BW73
Jim Bridger
                                                                       7.80E-03
                                                                       7.80E-03
                                                                       7.70E-03
                                                                       7.60E-03
                                                                       7.60E-03
                                                                       7.50E-03
                                                                       7.30E-03
8066_B_BW74
Jim Bridger
                                                                       7.80E-03
                                                                       7.80E-03
                                                                       7.70E-03
                                                                       7.60E-03
                                                                       7.60E-03
                                                                       7.50E-03
                                                                       7.20E-03
6664_B_101
Louisa
                                                                       7.30E-03
                                                                       7.30E-03
                                                                       7.20E-03
                                                                       7.20E-03
                                                                       7.20E-03
                                                                       7.20E-03
                                                                       7.00E-03
7030_B_U2
Major Oak Power
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
1733_B_2
Monroe (MI)
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
4078_B_3
Weston
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
2817_B_1
Leland Olds
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.90E-03
                                                                       6.90E-03
                                                                       6.80E-03
                                                                       6.80E-03
                                                                       6.60E-03
50974_B_UNIT 1
Scrubgrass Generating Plant
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.80E-03
                                                                       6.70E-03
                                                                       6.60E-03
                                                                       6.50E-03
                                                                       6.00E-03
50974_B_UNIT 2
Scrubgrass Generating Plant
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.80E-03
                                                                       6.70E-03
                                                                       6.60E-03
                                                                       6.50E-03
                                                                       6.00E-03
7030_B_U1
Major Oak Power
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.80E-03
                                                                       6.70E-03
                                                                       6.60E-03
                                                                       6.50E-03
                                                                       6.00E-03
6469_B_B1
Antelope Valley
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.70E-03
                                                                       6.50E-03
                                                                       6.30E-03
                                                                       6.20E-03
                                                                       5.30E-03
7790_B_1-1
Bonanza
                                                                       7.00E-03
                                                                       7.00E-03
                                                                       6.60E-03
                                                                       6.40E-03
                                                                       6.20E-03
                                                                       6.00E-03
                                                                       5.00E-03
8069_B_2
Huntington
                                                                       7.00E-03
                                                                       6.90E-03
                                                                       6.40E-03
                                                                       6.10E-03
                                                                       5.80E-03
                                                                       5.50E-03
                                                                       4.00E-03
8042_B_2
Belews Creek
                                                                       3.40E-02
                                                                       6.90E-03
                                                                       4.20E-03
                                                                       4.20E-03
                                                                       4.10E-03
                                                                       4.10E-03
                                                                       3.90E-03
60_B_1
Whelan Energy Center
                                                                       6.80E-03
                                                                       6.80E-03
                                                                       6.80E-03
                                                                       6.70E-03
                                                                       6.70E-03
                                                                       6.70E-03
                                                                       6.50E-03
470_B_3
Comanche (CO)
                                                                       6.80E-03
                                                                       6.80E-03
                                                                       6.70E-03
                                                                       6.50E-03
                                                                       6.40E-03
                                                                       6.30E-03
                                                                       6.20E-03
6096_B_2
Nebraska City
                                                                       6.80E-03
                                                                       6.80E-03
                                                                       6.80E-03
                                                                       6.70E-03
                                                                       6.70E-03
                                                                       6.70E-03
                                                                       6.60E-03
6009_B_2
White Bluff
                                                                       6.40E-03
                                                                       6.40E-03
                                                                       6.20E-03
                                                                       6.10E-03
                                                                       6.10E-03
                                                                       6.00E-03
                                                                       5.80E-03
56611_B_S01
Sandy Creek Energy Station
                                                                       6.30E-03
                                                                       6.30E-03
                                                                       5.80E-03
                                                                       5.60E-03
                                                                       5.30E-03
                                                                       5.00E-03
                                                                       3.80E-03
6179_B_2
Fayette Power Project
                                                                       6.10E-03
                                                                       6.10E-03
                                                                       4.50E-03
                                                                       4.50E-03
                                                                       4.30E-03
                                                                       4.00E-03
                                                                       3.80E-03
1733_B_1
Monroe (MI)
                                                                       7.00E-03
                                                                       6.10E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
6113_B_1
Gibson
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.80E-03
                                                                       5.70E-03
                                                                       5.50E-03
                                                                       5.40E-03
1356_B_4
Ghent
                                                                       6.30E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.70E-03
7213_B_2
Clover
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
6180_B_2
Oak Grove (TX)
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
4162_B_1
Naughton
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.80E-03
                                                                       5.70E-03
                                                                       5.60E-03
                                                                       5.50E-03
                                                                       5.00E-03
6204_B_3
Laramie River Station
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.80E-03
                                                                       5.70E-03
                                                                       5.60E-03
                                                                       5.50E-03
                                                                       5.00E-03
50951_B_1
Sunnyside Cogen Associates
                                                                       6.00E-03
                                                                       6.00E-03
                                                                       5.80E-03
                                                                       5.70E-03
                                                                       5.60E-03
                                                                       5.50E-03
                                                                       5.00E-03
6639_B_G1
R D Green
                                                                       5.90E-03
                                                                       5.90E-03
                                                                       5.80E-03
                                                                       5.80E-03
                                                                       5.70E-03
                                                                       5.70E-03
                                                                       5.50E-03
56456_B_BLR1
Plum Point Energy Station
                                                                       5.80E-03
                                                                       5.80E-03
                                                                       5.50E-03
                                                                       5.40E-03
                                                                       5.30E-03
                                                                       5.20E-03
                                                                       4.50E-03
2817_B_2
Leland Olds
                                                                       5.70E-03
                                                                       5.70E-03
                                                                       5.60E-03
                                                                       5.60E-03
                                                                       5.50E-03
                                                                       5.50E-03
                                                                       5.30E-03
3140_B_1, 3140_B_2
Brunner Island
                                                                       5.70E-03
                                                                       5.70E-03
                                                                       5.40E-03
                                                                       5.30E-03
                                                                       5.20E-03
                                                                       5.10E-03
                                                                       3.70E-03
2367_B_6
Schiller
                                                                       5.70E-03
                                                                       5.70E-03
                                                                       5.30E-03
                                                                       5.10E-03
                                                                       4.90E-03
                                                                       4.60E-03
                                                                       3.60E-03
1379_B_6, 1379_B_7, 1379_B_8, 1379_B_9
Shawnee
                                                                       5.60E-03
                                                                       5.60E-03
                                                                       5.50E-03
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.10E-03
56671_B_UHA01
Longview Power Plant
                                                                       5.50E-03
                                                                       5.50E-03
                                                                       4.80E-03
                                                                       4.30E-03
                                                                       3.80E-03
                                                                       3.50E-03
                                                                       2.30E-03
6068_B_2
Jeffrey Energy Center
                                                                       5.50E-03
                                                                       5.50E-03
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.20E-03
                                                                       4.30E-03
1379_B_1, 1379_B_2, 1379_B_3, 1379_B_4, 1379_B_5
Shawnee
                                                                       5.50E-03
                                                                       5.50E-03
                                                                       5.20E-03
                                                                       5.00E-03
                                                                       4.90E-03
                                                                       4.70E-03
                                                                       4.00E-03
994_B_4
AES Petersburg
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.20E-03
                                                                       5.00E-03
                                                                       4.90E-03
                                                                       4.80E-03
                                                                       3.20E-03
994_B_3
AES Petersburg
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.20E-03
                                                                       5.00E-03
                                                                       4.90E-03
                                                                       4.80E-03
                                                                       3.20E-03
6641_B_1
Independence Steam Electric Station
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.20E-03
                                                                       5.10E-03
                                                                       5.10E-03
                                                                       5.00E-03
                                                                       4.60E-03
6009_B_1
White Bluff
                                                                       5.40E-03
                                                                       5.40E-03
                                                                       5.20E-03
                                                                       5.10E-03
                                                                       5.10E-03
                                                                       4.50E-03
                                                                       4.50E-03
6179_B_1
Fayette Power Project
                                                                       5.30E-03
                                                                       5.30E-03
                                                                       5.30E-03
                                                                       5.30E-03
                                                                       5.30E-03
                                                                       5.30E-03
                                                                       5.20E-03
6002_B_3
James H Miller Jr
                                                                       5.40E-03
                                                                       5.30E-03
                                                                       5.00E-03
                                                                       4.90E-03
                                                                       4.70E-03
                                                                       4.50E-03
                                                                       3.70E-03
2828_B_3
Cardinal
                                                                       5.20E-03
                                                                       5.20E-03
                                                                       5.20E-03
                                                                       5.10E-03
                                                                       5.10E-03
                                                                       5.10E-03
                                                                       5.00E-03
6193_B_063B
Harrington
                                                                       5.20E-03
                                                                       5.20E-03
                                                                       5.10E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.90E-03
                                                                       4.70E-03
6071_B_2
Trimble County
                                                                       5.20E-03
                                                                       5.10E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.90E-03
1356_B_1
Ghent
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.90E-03
4162_B_2
Naughton
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
1384_B_1, 1384_B_2
Cooper
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
6254_B_1
Ottumwa
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
2107_B_2
Sioux
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
2167_B_2
New Madrid
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.80E-03
                                                                       4.70E-03
                                                                       4.60E-03
                                                                       4.50E-03
                                                                       4.00E-03
2167_B_1
New Madrid
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.80E-03
                                                                       4.70E-03
                                                                       4.60E-03
                                                                       4.50E-03
                                                                       4.00E-03
6165_B_1
Hunter
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.60E-03
                                                                       4.40E-03
                                                                       4.20E-03
                                                                       4.00E-03
                                                                       3.00E-03
6213_B_2SG1
Merom
                                                                       5.00E-03
                                                                       5.00E-03
                                                                       4.60E-03
                                                                       4.40E-03
                                                                       4.20E-03
                                                                       4.00E-03
                                                                       3.00E-03
26_B_5
E C Gaston
                                                                       5.00E-03
                                                                       4.90E-03
                                                                       4.40E-03
                                                                       4.10E-03
                                                                       3.80E-03
                                                                       3.50E-03
                                                                       2.00E-03
6761_B_101
Rawhide
                                                                       4.90E-03
                                                                       4.90E-03
                                                                       4.80E-03
                                                                       4.70E-03
                                                                       4.70E-03
                                                                       4.60E-03
                                                                       4.30E-03
2876_B_3, 2876_B_4, 2876_B_5
Kyger Creek
                                                                       4.90E-03
                                                                       4.80E-03
                                                                       4.80E-03
                                                                       4.80E-03
                                                                       4.70E-03
                                                                       4.70E-03
                                                                       4.60E-03
1082_B_4
Walter Scott Jr Energy Center
                                                                       4.80E-03
                                                                       4.80E-03
                                                                       4.80E-03
                                                                       4.80E-03
                                                                       4.80E-03
                                                                       4.70E-03
                                                                       4.70E-03
6639_B_G2
R D Green
                                                                       4.80E-03
                                                                       4.80E-03
                                                                       4.50E-03
                                                                       4.30E-03
                                                                       4.20E-03
                                                                       4.00E-03
                                                                       3.30E-03
6034_B_1
Belle River
                                                                       1.10E-02
                                                                       4.60E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       0.00E+00
                                                                       0.00E+00
6096_B_1
Nebraska City
                                                                       5.70E-03
                                                                       4.60E-03
                                                                       3.80E-03
                                                                       3.30E-03
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.60E-03
2291_B_5
North Omaha
                                                                       4.60E-03
                                                                       4.60E-03
                                                                       4.40E-03
                                                                       4.40E-03
                                                                       4.30E-03
                                                                       4.20E-03
                                                                       3.80E-03
10151_B_BLR1A, 10151_B_BLR1B 
Grant Town Power Plant
                                                                       6.20E-03
                                                                       4.50E-03
                                                                       4.40E-03
                                                                       4.30E-03
                                                                       4.30E-03
                                                                       4.20E-03
                                                                       3.90E-03
6113_B_2
Gibson
                                                                       4.50E-03
                                                                       4.50E-03
                                                                       4.20E-03
                                                                       4.20E-03
                                                                       4.10E-03
                                                                       4.00E-03
                                                                       3.80E-03
6113_B_4
Gibson
                                                                       4.50E-03
                                                                       4.40E-03
                                                                       3.80E-03
                                                                       3.50E-03
                                                                       3.30E-03
                                                                       3.30E-03
                                                                       3.30E-03
8223_B_2
Springerville
                                                                       4.30E-03
                                                                       4.30E-03
                                                                       4.20E-03
                                                                       4.20E-03
                                                                       4.20E-03
                                                                       4.20E-03
                                                                       4.00E-03
160_B_3
Apache Station
                                                                       4.20E-03
                                                                       4.20E-03
                                                                       4.00E-03
                                                                       3.90E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.30E-03
6071_B_1
Trimble County
                                                                       4.20E-03
                                                                       4.20E-03
                                                                       4.10E-03
                                                                       4.10E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.60E-03
6641_B_2
Independence Steam Electric Station
                                                                       4.20E-03
                                                                       4.10E-03
                                                                       3.80E-03
                                                                       3.50E-03
                                                                       3.40E-03
                                                                       3.20E-03
                                                                       3.10E-03
1091_B_3
George Neal North
                                                                       4.10E-03
                                                                       4.10E-03
                                                                       3.90E-03
                                                                       3.90E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       2.80E-03
59_B_1
Platte
                                                                       4.10E-03
                                                                       4.10E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
2823_B_B1
Milton R Young
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
6021_B_C3
Craig (CO)
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
8069_B_1
Huntington
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
6002_B_4
James H Miller Jr
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
1733_B_3
Monroe (MI)
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
6041_B_4
H L Spurlock
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       4.00E-03
6264_B_1
Mountaineer
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.90E-03
                                                                       3.90E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.50E-03
6213_B_1SG1
Merom
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       3.00E-03
6002_B_1
James H Miller Jr
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       3.00E-03
2442_B_4
Four Corners
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       3.00E-03
6002_B_2
James H Miller Jr
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       3.00E-03
1040_B_1, 1040_B_2
Whitewater Valley
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       2.00E-03
4158_B_BW43
Dave Johnston
                                                                       4.00E-03
                                                                       4.00E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       3.00E-03
3399_B_1
Cumberland (TN)
                                                                       3.90E-03
                                                                       3.90E-03
                                                                       3.90E-03
                                                                       3.80E-03
                                                                       3.80E-03
                                                                       3.80E-03
                                                                       3.70E-03
8102_B_2
Gavin Power, LLC
                                                                       5.90E-03
                                                                       3.90E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.30E-03
10603_B_031
Ebensburg Power
                                                                       3.90E-03
                                                                       3.90E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.30E-03
3130_B_1, 3130_B_2
Seward (PA)
                                                                       3.80E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.40E-03
6179_B_3
Fayette Power Project
                                                                       3.80E-03
                                                                       3.80E-03
                                                                       3.80E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       3.40E-03
                                                                       3.00E-03
6077_B_2
Gerald Gentleman
                                                                       3.80E-03
                                                                       3.80E-03
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.50E-03
55076_B_AA001, 55076_B_AA002
Red Hills Generating Facility
                                                                       1.80E-02
                                                                       3.70E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.50E-03
10671_B_1A, 10671_B_1B, 10671_B_2A, 10671_B_2B
River Valley
                                                                       5.70E-03
                                                                       3.70E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.40E-03
2277_B_1
Sheldon
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       3.40E-03
1167_B_9
Muscatine Plant #1
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
50888_B_BLR1
Northampton Generating Company LP
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.60E-03
                                                                       3.50E-03
1364_B_4
Mill Creek (KY)
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
3948_B_1
Mitchell (WV)
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       1.70E-03
3935_B_1
John E Amos
                                                                       3.50E-03
                                                                       3.50E-03
                                                                       3.20E-03
                                                                       3.00E-03
                                                                       2.90E-03
                                                                       2.70E-03
                                                                       2.00E-03
6469_B_B2
Antelope Valley
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.40E-03
6166_B_MB1, 6166_B_MB2
Rockport
                                                                       3.40E-03
                                                                       3.40E-03
                                                                       3.10E-03
                                                                       3.00E-03
                                                                       2.90E-03
                                                                       2.70E-03
                                                                       2.10E-03
983_B_1, 983_B_2, 983_B_3
Clifty Creek
                                                                       3.20E-03
                                                                       3.20E-03
                                                                       3.20E-03
                                                                       3.20E-03
                                                                       3.10E-03
                                                                       3.10E-03
                                                                       3.10E-03
3403_B_2
Gallatin (TN)
                                                                       3.10E-03
                                                                       3.10E-03
                                                                       3.10E-03
                                                                       3.10E-03
                                                                       3.10E-03
                                                                       3.00E-03
                                                                       3.00E-03
2168_B_MB2
Thomas Hill
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
10678_B_BLR1
AES Warrior Run Cogeneration Facility
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
2168_B_MB3
Thomas Hill
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
1733_B_4
Monroe (MI)
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
6165_B_3
Hunter
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
2107_B_1
Sioux
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
703_B_3BLR
Bowen
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
6064_B_N1
Nearman Creek
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
3403_B_1
Gallatin (TN)
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.90E-03
                                                                       2.90E-03
4158_B_BW41
Dave Johnston
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.00E-03
6030_B_1
Coal Creek
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.00E-03
4158_B_BW42
Dave Johnston
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.00E-03
56596_B_1
Wygen III
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.00E-03
6165_B_2
Hunter
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.00E-03
10743_B_CFB1, 10743_B_CFB2
Morgantown Energy Facility
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.00E-03
56319_B_1
Wygen 2
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.00E-03
2828_B_1
Cardinal
                                                                       3.00E-03
                                                                       3.00E-03
                                                                       2.60E-03
                                                                       2.40E-03
                                                                       2.20E-03
                                                                       2.10E-03
                                                                       1.10E-03
6768_B_1
Sikeston Power Station
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.20E-03
130_B_4
Cross
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.80E-03
2442_B_5
Four Corners
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.70E-03
6772_B_1
Hugo
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.40E-03
                                                                       1.90E-03
298_B_LIM2
Limestone
                                                                       2.90E-03
                                                                       2.90E-03
                                                                       2.70E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.10E-03
50776_B_BLR1, 50776_B_BLR2
Panther Creek Energy Facility
                                                                       2.90E-03
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.80E-03
6195_B_1
John Twitty Energy Center
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.60E-03
                                                                       2.40E-03
                                                                       2.30E-03
                                                                       2.20E-03
                                                                       1.50E-03
6077_B_1
Gerald Gentleman
                                                                       2.80E-03
                                                                       2.80E-03
                                                                       2.70E-03
                                                                       2.70E-03
                                                                       2.70E-03
                                                                       2.70E-03
                                                                       2.70E-03
3948_B_2
Mitchell (WV)
                                                                       2.70E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.40E-03
6068_B_1
Jeffrey Energy Center
                                                                       2.70E-03
                                                                       2.70E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.00E-03
8223_B_3
Springerville
                                                                       2.70E-03
                                                                       2.70E-03
                                                                       2.30E-03
                                                                       2.10E-03
                                                                       1.90E-03
                                                                       1.70E-03
                                                                       7.00E-04
1364_B_3
Mill Creek (KY)
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.20E-03
130_B_3
Cross
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.50E-03
                                                                       2.50E-03
                                                                       2.40E-03
6190_B_2
Brame Energy Center
                                                                       2.60E-03
                                                                       2.60E-03
                                                                       2.50E-03
                                                                       2.40E-03
                                                                       2.30E-03
                                                                       2.20E-03
                                                                       1.90E-03
130_B_1
Cross
                                                                       2.50E-03
                                                                       2.50E-03
                                                                       2.50E-03
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.30E-03
2727_B_4
Marshall (NC)
                                                                       2.70E-03
                                                                       2.50E-03
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.40E-03
2240_B_8
Lon Wright
                                                                       2.50E-03
                                                                       2.50E-03
                                                                       2.30E-03
                                                                       2.10E-03
                                                                       2.00E-03
                                                                       1.90E-03
                                                                       1.30E-03
3149_B_2
TalenEnergy Montour
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.40E-03
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.10E-03
8042_B_1
Belews Creek
                                                                       7.20E-03
                                                                       2.30E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.60E-03
                                                                       1.50E-03
                                                                       1.30E-03
983_B_4, 983_B_5, 983_B_6
Clifty Creek
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.10E-03
298_B_LIM1
Limestone
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.10E-03
8222_B_B1
Coyote
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.00E-03
6090_B_3
Sherburne County
                                                                       2.30E-03
                                                                       2.30E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.00E-03
3403_B_4
Gallatin (TN)
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.10E-03
2277_B_2
Sheldon
                                                                       2.20E-03
                                                                       2.20E-03
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
3149_B_1
TalenEnergy Montour
                                                                       2.20E-03
                                                                       2.10E-03
                                                                       1.90E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.40E-03
                                                                       6.60E-04
7097_B_BLR1
J K Spruce
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.10E-03
2079_B_5A
Hawthorn
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       1.90E-03
                                                                       1.90E-03
                                                                       1.70E-03
56609_B_1
Dry Fork Station
                                                                       2.10E-03
                                                                       2.10E-03
                                                                       2.00E-03
                                                                       1.90E-03
                                                                       1.90E-03
                                                                       1.80E-03
                                                                       1.50E-03
2721_B_5
James E. Rogers Energy Complex
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
1241_B_2
La Cygne
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       1.90E-03
667_B_2
Northside Generating Station
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
56224_B_BLR100
TS Power Plant
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
703_B_4BLR
Bowen
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
56068_B_18
Elm Road Generating Station
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
6041_B_1
H L Spurlock
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       1.80E-03
                                                                       1.00E-03
                                                                       1.00E-03
8219_B_1
Ray D Nixon
                                                                       2.80E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
6030_B_2
Coal Creek
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
6101_B_BW91
Wyodak
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
6041_B_2
H L Spurlock
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
6065_B_1
Iatan
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
6257_B_2
Scherer
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       2.00E-03
2367_B_4
Schiller
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       1.90E-03
                                                                       1.90E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.60E-03
7210_B_COP1
Cope
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       1.80E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.50E-03
                                                                       1.00E-03
55479_B_3
Wygen 1
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       1.80E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.50E-03
                                                                       1.00E-03
55749_B_PC1
Hardin Generator Project
                                                                       2.00E-03
                                                                       2.00E-03
                                                                       1.80E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.50E-03
                                                                       1.00E-03
963_B_41
Dallman
                                                                       1.90E-03
                                                                       1.90E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.50E-03
                                                                       1.30E-03
                                                                       7.50E-04
6095_B_2
Sooner
                                                                       2.70E-03
                                                                       1.90E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.60E-03
108_B_SGU1
Holcomb
                                                                       1.90E-03
                                                                       1.90E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.40E-03
2721_B_6
James E. Rogers Energy Complex
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
6204_B_1
Laramie River Station
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.60E-03
2168_B_MB1
Thomas Hill
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.60E-03
2876_B_1, 2876_B_2
Kyger Creek
                                                                       1.80E-03
                                                                       1.80E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.60E-03
7097_B_BLR2
J K Spruce
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.70E-03
3935_B_3
John E Amos
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.50E-03
                                                                       1.50E-03
                                                                       1.40E-03
                                                                       1.20E-03
6139_B_3
Welsh
                                                                       1.70E-03
                                                                       1.70E-03
                                                                       1.60E-03
                                                                       1.50E-03
                                                                       1.50E-03
                                                                       1.40E-03
                                                                       1.20E-03
3403_B_3
Gallatin (TN)
                                                                       1.60E-03
                                                                       1.60E-03
                                                                       1.60E-03
                                                                       1.60E-03
                                                                       1.60E-03
                                                                       1.60E-03
                                                                       1.50E-03
3470_B_WAP8
W A Parish
                                                                       1.50E-03
                                                                       1.50E-03
                                                                       1.50E-03
                                                                       1.50E-03
                                                                       1.40E-03
                                                                       1.40E-03
                                                                       8.70E-04
2828_B_2
Cardinal
                                                                       1.40E-03
                                                                       1.40E-03
                                                                       1.30E-03
                                                                       1.30E-03
                                                                       1.20E-03
                                                                       1.10E-03
                                                                       9.00E-04
6139_B_1
Welsh
                                                                       1.30E-03
                                                                       1.30E-03
                                                                       1.30E-03
                                                                       1.30E-03
                                                                       1.30E-03
                                                                       1.20E-03
                                                                       1.20E-03
667_B_1
Northside Generating Station
                                                                       1.20E-03
                                                                       1.20E-03
                                                                       1.20E-03
                                                                       1.20E-03
                                                                       1.20E-03
                                                                       1.10E-03
                                                                       4.70E-04
8223_B_4
Springerville
                                                                       1.20E-03
                                                                       1.20E-03
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       9.50E-04
2727_B_3
Marshall (NC)
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.00E-03
6034_B_2
Belle River
                                                                       2.00E-03
                                                                       1.10E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
60_B_2
Whelan Energy Center
                                                                       1.10E-03
                                                                       1.10E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
4125_B_9
Manitowoc
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
4078_B_4
Weston
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       0.00E+00
6248_B_1
Pawnee
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
3935_B_2
John E Amos
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
56068_B_19
Elm Road Generating Station
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
165_B_2
GREC
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       1.00E-03
6195_B_2
John Twitty Energy Center
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       9.90E-04
                                                                       9.80E-04
                                                                       9.80E-04
                                                                       9.80E-04
                                                                       9.50E-04
7343_B_4
George Neal South
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       9.60E-04
                                                                       9.40E-04
                                                                       9.20E-04
                                                                       9.00E-04
                                                                       8.00E-04
3470_B_WAP5
W A Parish
                                                                       1.00E-03
                                                                       1.00E-03
                                                                       9.60E-04
                                                                       9.40E-04
                                                                       9.20E-04
                                                                       9.00E-04
                                                                       5.10E-04
56786_B_1
Spiritwood Station
                                                                       9.00E-04
                                                                       9.00E-04
                                                                       8.60E-04
                                                                       8.40E-04
                                                                       8.20E-04
                                                                       8.00E-04
                                                                       7.00E-04
6194_B_171B
Tolk
                                                                       7.00E-04
                                                                       7.00E-04
                                                                       6.60E-04
                                                                       6.40E-04
                                                                       6.20E-04
                                                                       6.00E-04
                                                                       5.00E-04
50835_B_1
TES Filer City Station
                                                                       6.00E-04
                                                                       6.00E-04
                                                                       6.00E-04
                                                                       6.00E-04
                                                                       6.00E-04
                                                                       6.00E-04
                                                                       6.00E-04
50835_B_2
TES Filer City Station
                                                                       6.00E-04
                                                                       6.00E-04
                                                                       5.80E-04
                                                                       5.70E-04
                                                                       5.60E-04
                                                                       5.50E-04
                                                                       5.00E-04
6138_B_1
Flint Creek
                                                                       6.00E-04
                                                                       5.90E-04
                                                                       5.40E-04
                                                                       5.10E-04
                                                                       4.80E-04
                                                                       4.50E-04
                                                                       3.00E-04
6194_B_172B
Tolk
                                                                       5.80E-04
                                                                       5.80E-04
                                                                       5.60E-04
                                                                       5.40E-04
                                                                       5.30E-04
                                                                       5.20E-04
                                                                       4.60E-04
6098_B_1
Big Stone
                                                                       2.10E-04
                                                                       2.10E-04
                                                                       2.10E-04
                                                                       2.10E-04
                                                                       2.10E-04
                                                                       2.10E-04
                                                                       2.10E-04
3470_B_WAP6
W A Parish
                                                                       2.00E-04
                                                                       2.00E-04
                                                                       1.80E-04
                                                                       1.70E-04
                                                                       1.60E-04
                                                                       1.50E-04
                                                                       1.00E-04
3470_B_WAP7
W A Parish
                                                                       1.90E-04
                                                                       1.90E-04
                                                                       1.80E-04
                                                                       1.70E-04
                                                                       1.70E-04
                                                                       1.60E-04
                                                                       1.40E-04
4271_B_B1
John P Madgett
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
7213_B_1
Clover
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00
                                                                       0.00E+00

    Appendix B

                                   Unique ID
                                Number of Units
                                  Plant Name
                                     State
                                Retirement Year
                                 Modeled Fuel
                                 Capacity (MW)
                                  Compliance
                                  PM Control
                               Min 99th Rounded
                           99th PM Emissions (tons)
6076_B_4
                                                                              1
Colstrip
Montana
No Retirement Listed
Subbituminous
                                                                            740
Stack
WS
                                                                          0.021
                                                                          587.0
10343_B_SG-101
                                                                              1
Foster Wheeler Mt Carmel Cogen
Pennsylvania
No Retirement Listed
Waste Coal
                                                                             43
Stack
B
                                                                          0.018
                                                                           13.2
6076_B_3
                                                                              1
Colstrip
Montana
No Retirement Listed
Subbituminous
                                                                            740
Stack
WS
                                                                          0.018
                                                                          497.3
2103_B_2
                                                                              1
Labadie
Missouri
                                                                           2036
Subbituminous
                                                                            593
PM CEMS - 30-day rolling average
ESPC
                                                                          0.017
                                                                          269.7
2103_B_1
                                                                              1
Labadie
Missouri
                                                                           2036
Subbituminous
                                                                            593
PM CEMS - 30-day rolling average
ESPC
                                                                          0.017
                                                                          280.4
2103_B_4
                                                                              1
Labadie
Missouri
                                                                           2042
Subbituminous
                                                                            593
PM CEMS - 30-day rolling average
ESPC
                                                                          0.017
                                                                          339.0
2103_B_3
                                                                              1
Labadie
Missouri
                                                                           2042
Subbituminous
                                                                            593
PM CEMS - 30-day rolling average
ESPC
                                                                          0.017
                                                                          367.8
976_B_123
                                                                              1
Marion
Illinois
No Retirement Listed
Bituminous, Waste Coal
                                                                            120
PM CEMS - 30-day rolling average
B
                                                                          0.017
                                                                           78.8
10113_B_CFB1, 10113_B_CFB2
                                                                              2
John B Rich Memorial Power Station
Pennsylvania
No Retirement Listed
Waste Coal
                                                                             80
PM CEMS - 30-day rolling average
B
                                                                          0.015
                                                                           30.9
6823_B_W1
                                                                              1
D B Wilson
Kentucky
No Retirement Listed
Bituminous
                                                                            417
PM CEMS - 30-day rolling average
ESPC
                                                                          0.015
                                                                          234.8
50611_B_031
                                                                              1
Westwood Generation LLC
Pennsylvania
No Retirement Listed
Waste Coal
                                                                             30
Stack
B
                                                                          0.015
                                                                            3.0
6146_B_1
                                                                              1
Martin Lake
Texas
No Retirement Listed
Lignite, Subbituminous
                                                                            800
PM CEMS - 30-day rolling average
ESPC
                                                                          0.014
                                                                          337.5
6041_B_3
                                                                              1
H L Spurlock
Kentucky
No Retirement Listed
Bituminous
                                                                            268
PM CEMS - 30-day rolling average
B
                                                                          0.012
                                                                           71.0
3954_B_3
                                                                              1
Mt Storm
West Virginia
No Retirement Listed
Bituminous
                                                                            520
PM CEMS - 30-day rolling average
ESPC + WS
                                                                          0.012
                                                                          112.3
6146_B_3
                                                                              1
Martin Lake
Texas
No Retirement Listed
Lignite, Subbituminous
                                                                            805
PM CEMS - 30-day rolling average
ESPC
                                                                          0.012
                                                                          284.9
1082_B_3
                                                                              1
Walter Scott Jr Energy Center
Iowa
No Retirement Listed
Subbituminous
                                                                            708
Stack
ESPC + B
                                                                          0.011
                                                                          265.4
3954_B_1, 3954_B_2
                                                                              2
Mt Storm
West Virginia
No Retirement Listed
Bituminous
                                                                           1109
PM CEMS - 30-day rolling average
ESPC + WS
                                                                          0.011
                                                                          138.1
1893_B_4
                                                                              1
Clay Boswell
Minnesota
No Retirement Listed
Subbituminous
                                                                            584
PM CEMS - 30-day rolling average
B
                                                                          0.011
                                                                          198.5
10143_B_ABB01
                                                                              1
Colver Power Project
Pennsylvania
No Retirement Listed
Waste Coal
                                                                            110
Stack
B
                                                                           0.01
                                                                           48.6
54634_B_1
                                                                              1
St Nicholas Cogen Project
Pennsylvania
No Retirement Listed
Waste Coal
                                                                             86
Stack
B
                                                                           0.01
                                                                           53.6
8102_B_1
                                                                              1
Gavin Power, LLC
Ohio
No Retirement Listed
Bituminous, Subbituminous
                                                                           1348
Stack
ESPC
                                                                           0.01
                                                                          428.9
2823_B_B2
                                                                              1
Milton R Young
North Dakota
No Retirement Listed
Lignite
                                                                            447
PM CEMS - 30-day rolling average
ESPC
                                                                           0.01
                                                                          192.3
6018_B_2
                                                                              1
East Bend
Kentucky
                                                                           2041
Bituminous
                                                                            600
PM CEMS - 30-day rolling average
ESPH
                                                                         0.0099
                                                                          142.9
6113_B_3
                                                                              1
Gibson
Indiana
                                                                           2034
Bituminous
                                                                            630
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0098
                                                                          112.6
6065_B_2
                                                                              1
Iatan
Missouri
No Retirement Listed
Subbituminous
                                                                            882
PM CEMS - 30-day rolling average
B
                                                                          0.009
                                                                          241.5
645_B_BB04
                                                                              1
Big Bend
Florida
No Retirement Listed
Bituminous, Natural Gas
                                                                            437
PM CEMS - 30-day rolling average
ESPC
                                                                          0.009
                                                                           73.7
6068_B_3
                                                                              1
Jeffrey Energy Center
Kansas
                                                                           2030
Subbituminous
                                                                            728
Stack
ESPC
                                                                          0.009
                                                                          136.1
6177_B_U2B
                                                                              1
Coronado
Arizona
                                                                           2032
Subbituminous
                                                                            382
PM CEMS - 30-day rolling average
ESPH
                                                                         0.0086
                                                                           65.3
6177_B_U1B
                                                                              1
Coronado
Arizona
                                                                           2032
Subbituminous
                                                                            380
PM CEMS - 30-day rolling average
ESPH
                                                                         0.0086
                                                                           49.4
6183_B_SM-1
                                                                              1
San Miguel
Texas
No Retirement Listed
Lignite
                                                                            391
Stack
ESPC
                                                                         0.0082
                                                                          117.0
6705_B_4
                                                                              1
Warrick
Indiana
No Retirement Listed
Bituminous
                                                                            295
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0082
                                                                           79.7
628_B_5
                                                                              1
Crystal River
Florida
                                                                           2034
Bituminous
                                                                            710
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0081
                                                                          166.2
628_B_4
                                                                              1
Crystal River
Florida
                                                                           2034
Bituminous
                                                                            712
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0081
                                                                          183.7
1356_B_2, 1356_B_3
                                                                              2
Ghent
Kentucky
No Retirement Listed
Bituminous
                                                                            980
PM CEMS - 30-day rolling average
ESPH + B
                                                                         0.0081
                                                                          104.8
6146_B_2
                                                                              1
Martin Lake
Texas
No Retirement Listed
Lignite, Subbituminous
                                                                            805
PM CEMS - 30-day rolling average
ESPC
                                                                          0.008
                                                                          162.1
6180_B_1
                                                                              1
Oak Grove (TX)
Texas
No Retirement Listed
Lignite
                                                                            855
PM CEMS - 30-day rolling average
B
                                                                          0.008
                                                                          242.0
6204_B_2
                                                                              1
Laramie River Station
Wyoming
No Retirement Listed
Subbituminous
                                                                            570
Stack
ESPH
                                                                          0.008
                                                                          170.0
136_B_2
                                                                              1
Seminole (FL)
Florida
No Retirement Listed
Bituminous
                                                                            657
Stack
ESPC
                                                                          0.008
                                                                          129.7
2364_B_1, 2364_B_2
                                                                              2
Merrimack
New Hampshire
No Retirement Listed
Bituminous
                                                                            438
Stack
ESPC
                                                                         0.0079
                                                                            3.3
1393_B_6
                                                                              1
R S Nelson
Louisiana
No Retirement Listed
Subbituminous, Petroleum Coke
                                                                            550
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0079
                                                                           89.2
8066_B_BW73
                                                                              1
Jim Bridger
Wyoming
                                                                           2037
Subbituminous
                                                                            523
Stack
ESPC
                                                                         0.0078
                                                                          129.4
8066_B_BW74
                                                                              1
Jim Bridger
Wyoming
                                                                           2037
Subbituminous
                                                                            530
Stack
ESPC
                                                                         0.0078
                                                                          129.0
6664_B_101
                                                                              1
Louisa
Iowa
No Retirement Listed
Subbituminous
                                                                            746
Stack
ESPH + B
                                                                         0.0073
                                                                          133.9
7030_B_U2
                                                                              1
Major Oak Power
Texas
No Retirement Listed
Lignite, Subbituminous
                                                                            153
Stack
B
                                                                          0.007
                                                                           48.0
1733_B_2
                                                                              1
Monroe (MI)
Michigan
                                                                           2040
Bituminous, Subbituminous
                                                                            773
PM CEMS - 30-day rolling average
ESPC
                                                                          0.007
                                                                          148.7
4078_B_3
                                                                              1
Weston
Wisconsin
No Retirement Listed
Subbituminous
                                                                            327
PM CEMS - 30-day rolling average
B
                                                                          0.007
                                                                           38.2
2817_B_1
                                                                              1
Leland Olds
North Dakota
No Retirement Listed
Lignite, Subbituminous
                                                                            222
Stack
ESPC
                                                                          0.007
                                                                           49.3
50974_B_UNIT 1
                                                                              1
Scrubgrass Generating Plant
Pennsylvania
No Retirement Listed
Bituminous, Waste Coal
                                                                             43
Stack
B + C
                                                                          0.007
                                                                           12.6
50974_B_UNIT 2
                                                                              1
Scrubgrass Generating Plant
Pennsylvania
No Retirement Listed
Bituminous, Waste Coal
                                                                             43
Stack
B + C
                                                                          0.007
                                                                           11.8
7030_B_U1
                                                                              1
Major Oak Power
Texas
No Retirement Listed
Lignite, Subbituminous
                                                                            152
Stack
B
                                                                          0.007
                                                                           49.9
6469_B_B1
                                                                              1
Antelope Valley
North Dakota
No Retirement Listed
Lignite
                                                                            450
Stack
B
                                                                          0.007
                                                                          106.1
7790_B_1-1
                                                                              1
Bonanza
Utah
                                                                           2030
Bituminous
                                                                            458
Stack
B
                                                                          0.007
                                                                          139.6
8069_B_2
                                                                              1
Huntington
Utah
                                                                           2036
Bituminous
                                                                            450
Stack
B
                                                                         0.0069
                                                                           76.8
8042_B_2
                                                                              1
Belews Creek
North Carolina
                                                                           2038
Bituminous
                                                                           1110
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0069
                                                                          131.3
60_B_1
                                                                              1
Whelan Energy Center
Nebraska
No Retirement Listed
Subbituminous
                                                                             77
Unknown
ESPC
                                                                         0.0068
                                                                           13.7
470_B_3
                                                                              1
Comanche (CO)
Colorado
                                                                           2040
Subbituminous
                                                                            750
PM CEMS - 30-day rolling average
B
                                                                         0.0068
                                                                          151.1
6096_B_2
                                                                              1
Nebraska City
Nebraska
No Retirement Listed
Subbituminous
                                                                            691
Stack
B
                                                                         0.0068
                                                                          133.5
6009_B_2
                                                                              1
White Bluff
Arkansas
                                                                           2029
Subbituminous
                                                                            819
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0064
                                                                          117.3
56611_B_S01
                                                                              1
Sandy Creek Energy Station
Texas
No Retirement Listed
Subbituminous
                                                                            933
Stack
B
                                                                         0.0062
                                                                          197.8
6179_B_2
                                                                              1
Fayette Power Project
Texas
No Retirement Listed
Subbituminous
                                                                            590
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0061
                                                                          133.7
1733_B_1
                                                                              1
Monroe (MI)
Michigan
                                                                           2040
Bituminous, Subbituminous
                                                                            758
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0061
                                                                          135.4
6113_B_1
                                                                              1
Gibson
Indiana
                                                                           2038
Bituminous
                                                                            630
PM CEMS - 30-day rolling average
ESPC
                                                                          0.006
                                                                           80.3
1356_B_4
                                                                              1
Ghent
Kentucky
No Retirement Listed
Bituminous
                                                                            465
PM CEMS - 30-day rolling average
ESPH + B
                                                                          0.006
                                                                           81.5
7213_B_2
                                                                              1
Clover
Virginia
No Retirement Listed
Bituminous
                                                                            437
PM CEMS - 30-day rolling average
B + WS
                                                                          0.006
                                                                           20.3
6180_B_2
                                                                              1
Oak Grove (TX)
Texas
No Retirement Listed
Lignite
                                                                            855
PM CEMS - 30-day rolling average
B
                                                                          0.006
                                                                          190.5
4162_B_1
                                                                              1
Naughton
Wyoming
No Retirement Listed
Subbituminous
                                                                            156
Stack
ESPC + C
                                                                          0.006
                                                                           41.3
6204_B_3
                                                                              1
Laramie River Station
Wyoming
No Retirement Listed
Subbituminous
                                                                            570
Stack
ESPH
                                                                          0.006
                                                                          128.2
50951_B_1
                                                                              1
Sunnyside Cogen Associates
Utah
No Retirement Listed
Waste Coal
                                                                             51
Stack
B
                                                                          0.006
                                                                               
6639_B_G1
                                                                              1
R D Green
Kentucky
No Retirement Listed
Bituminous
                                                                            231
Stack
ESPC
                                                                         0.0059
                                                                           41.4
56456_B_BLR1
                                                                              1
Plum Point Energy Station
Arkansas
No Retirement Listed
Subbituminous
                                                                            680
Stack
B
                                                                         0.0058
                                                                          113.3
2817_B_2
                                                                              1
Leland Olds
North Dakota
No Retirement Listed
Lignite, Subbituminous
                                                                            445
Stack
ESPC
                                                                         0.0057
                                                                           78.6
3140_B_1, 3140_B_2
                                                                              2
Brunner Island
Pennsylvania
No Retirement Listed
Bituminous, Natural Gas
                                                              306 (Unit 1 only)
Stack
B
                                                                         0.0057
                                                                           19.7
2367_B_6
                                                                              1
Schiller
New Hampshire
No Retirement Listed
Bituminous
                                                                             48
Stack
ESPC
                                                                         0.0057
                                                                            1.1
1379_B_6, 1379_B_7, 1379_B_8, 1379_B_9
                                                                              4
Shawnee
Kentucky
                                                                           2034
Bituminous, Subbituminous
                                                                            536
Stack
B + C
                                                                         0.0056
                                                                           25.1
56671_B_UHA01
                                                                              1
Longview Power Plant
West Virginia
No Retirement Listed
Bituminous
                                                                            700
PM CEMS - 30-day rolling average
B
                                                                         0.0055
                                                                          133.6
6068_B_2
                                                                              1
Jeffrey Energy Center
Kansas
                                                                           2039
Subbituminous
                                                                            733
Stack
ESPC
                                                                         0.0055
                                                                          117.0
1379_B_1, 1379_B_2, 1379_B_3, 1379_B_4, 1379_B_5
                                                                              5
Shawnee
Kentucky
                                                                           2034
Bituminous, Subbituminous
                                                                            670
Stack
B + C
                                                                         0.0055
                                                                           20.7
994_B_4
                                                                              1
AES Petersburg
Indiana
No Retirement Listed
Bituminous
                                                                            530
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0054
                                                                           72.4
994_B_3
                                                                              1
AES Petersburg
Indiana
No Retirement Listed
Bituminous
                                                                            528
PM CEMS - 30-day rolling average
ESPC + B
                                                                         0.0054
                                                                           65.3
6641_B_1
                                                                              1
Independence Steam Electric Station
Arkansas
                                                                           2031
Subbituminous
                                                                            809
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0054
                                                                           83.4
6009_B_1
                                                                              1
White Bluff
Arkansas
                                                                           2029
Subbituminous
                                                                            818
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0054
                                                                          117.3
6179_B_1
                                                                              1
Fayette Power Project
Texas
No Retirement Listed
Subbituminous
                                                                            590
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0054
                                                                           78.2
6002_B_3
                                                                              1
James H Miller Jr
Alabama
No Retirement Listed
Subbituminous
                                                                            687
Stack
ESPC + WS
                                                                         0.0053
                                                                          109.4
2828_B_3
                                                                              1
Cardinal
Ohio
No Retirement Listed
Bituminous
                                                                            620
Stack
ESPH
                                                                         0.0052
                                                                           87.4
6193_B_063B
                                                                              1
Harrington
Texas
                                                                           2041
Subbituminous
                                                                            340
Stack
B
                                                                         0.0052
                                                                           45.5
6071_B_2
                                                                              1
Trimble County
Kentucky
No Retirement Listed
Bituminous, Subbituminous
                                                                            732
PM CEMS - 30-day rolling average
ESPC + B
                                                                         0.0051
                                                                          108.5
1356_B_1
                                                                              1
Ghent
Kentucky
No Retirement Listed
Bituminous
                                                                            474
PM CEMS - 30-day rolling average
ESPC + B
                                                                          0.005
                                                                           72.8
4162_B_2
                                                                              1
Naughton
Wyoming
No Retirement Listed
Subbituminous
                                                                            201
Stack
ESPC + C
                                                                          0.005
                                                                           40.9
1384_B_1, 1384_B_2
                                                                              2
Cooper
Kentucky
No Retirement Listed
Bituminous
                                                                            341
PM CEMS - 30-day rolling average
ESPC + B
                                                                          0.005
                                                                            1.3
6254_B_1
                                                                              1
Ottumwa
Iowa
No Retirement Listed
Subbituminous
                                                                            725
PM CEMS - 30-day rolling average
ESPH + B
                                                                          0.005
                                                                          106.4
2107_B_2
                                                                              1
Sioux
Missouri
                                                                           2029
Bituminous, Subbituminous
                                                                            487
PM CEMS - 30-day rolling average
ESPC
                                                                          0.005
                                                                           38.9
2167_B_2
                                                                              1
New Madrid
Missouri
No Retirement Listed
Subbituminous
                                                                            575
Stack
ESPC
                                                                          0.005
                                                                           82.2
2167_B_1
                                                                              1
New Madrid
Missouri
No Retirement Listed
Subbituminous
                                                                            579
Stack
ESPC
                                                                          0.005
                                                                           80.5
6165_B_1
                                                                              1
Hunter
Utah
                                                                           2042
Bituminous
                                                                            471
Stack
ESPC + B
                                                                          0.005
                                                                           62.8
6213_B_2SG1
                                                                              1
Merom
Indiana
No Retirement Listed
Bituminous
                                                                            492
Stack
ESPC
                                                                          0.005
                                                                           54.5
26_B_5
                                                                              1
E C Gaston
Alabama
No Retirement Listed
Bituminous
                                                                            832
Stack
ESPH + B + WS
                                                                         0.0049
                                                                           96.8
6761_B_101
                                                                              1
Rawhide
Colorado
                                                                           2030
Subbituminous
                                                                            280
Stack
B
                                                                         0.0049
                                                                           52.8
2876_B_3, 2876_B_4, 2876_B_5
                                                                              3
Kyger Creek
Ohio
No Retirement Listed
Bituminous, Subbituminous
                                                                            576
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0048
                                                                           27.8
1082_B_4
                                                                              1
Walter Scott Jr Energy Center
Iowa
No Retirement Listed
Subbituminous
                                                                            814
Stack
B
                                                                         0.0048
                                                                           88.5
6639_B_G2
                                                                              1
R D Green
Kentucky
No Retirement Listed
Bituminous
                                                                            223
Stack
ESPC
                                                                         0.0048
                                                                           33.1
6034_B_1
                                                                              1
Belle River
Michigan
                                                                           2029
Subbituminous
                                                                            635
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0046
                                                                           37.2
6096_B_1
                                                                              1
Nebraska City
Nebraska
No Retirement Listed
Subbituminous
                                                                            654
Stack
ESPC
                                                                         0.0046
                                                                           71.4
2291_B_5
                                                                              1
North Omaha
Nebraska
No Retirement Listed
Subbituminous
                                                                            216
Stack
ESPC
                                                                         0.0046
                                                                           31.2
10151_B_BLR1A, 10151_B_BLR1B 
                                                                              2
Grant Town Power Plant
West Virginia
No Retirement Listed
Waste Coal
                                                                             80
Stack
B
                                                                         0.0045
                                                                            9.3
6113_B_2
                                                                              1
Gibson
Indiana
                                                                           2038
Bituminous
                                                                            630
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0045
                                                                           67.3
6113_B_4
                                                                              1
Gibson
Indiana
                                                                           2034
Bituminous
                                                                            622
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0044
                                                                           46.8
8223_B_2
                                                                              1
Springerville
Arizona
                                                                           2032
Subbituminous
                                                                            406
Stack
B
                                                                         0.0043
                                                                           51.3
160_B_3
                                                                              1
Apache Station
Arizona
No Retirement Listed
Bituminous, Subbituminous
                                                                            175
Stack
ESPH
                                                                         0.0042
                                                                           22.6
6071_B_1
                                                                              1
Trimble County
Kentucky
No Retirement Listed
Bituminous
                                                                            511
PM CEMS - 30-day rolling average
ESPC + B
                                                                         0.0042
                                                                           62.2
6641_B_2
                                                                              1
Independence Steam Electric Station
Arkansas
                                                                           2031
Subbituminous
                                                                            842
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0041
                                                                           71.6
1091_B_3
                                                                              1
George Neal North
Iowa
No Retirement Listed
Subbituminous
                                                                            515
Stack
ESPC + B
                                                                         0.0041
                                                                           50.7
59_B_1
                                                                              1
Platte
Nebraska
No Retirement Listed
Subbituminous
                                                                            100
Stack
ESPH + B
                                                                         0.0041
                                                                            8.4
2823_B_B1
                                                                              1
Milton R Young
North Dakota
No Retirement Listed
Lignite
                                                                            237
PM CEMS - 30-day rolling average
ESPC
                                                                          0.004
                                                                           41.4
6021_B_C3
                                                                              1
Craig (CO)
Colorado
                                                                           2030
Subbituminous
                                                                            448
Stack
B
                                                                          0.004
                                                                           59.5
8069_B_1
                                                                              1
Huntington
Utah
                                                                           2036
Bituminous
                                                                            459
Stack
ESPC + B
                                                                          0.004
                                                                           55.8
6002_B_4
                                                                              1
James H Miller Jr
Alabama
No Retirement Listed
Subbituminous
                                                                            699
Stack
ESPC + WS
                                                                          0.004
                                                                           95.1
1733_B_3
                                                                              1
Monroe (MI)
Michigan
                                                                           2040
Bituminous, Subbituminous, Petroleum Coke
                                                                            773
PM CEMS - 30-day rolling average
ESPC
                                                                          0.004
                                                                           62.4
6041_B_4
                                                                              1
H L Spurlock
Kentucky
No Retirement Listed
Bituminous
                                                                            268
PM CEMS - 30-day rolling average
B
                                                                          0.004
                                                                           24.9
6264_B_1
                                                                              1
Mountaineer
West Virginia
                                                                           2040
Bituminous
                                                                           1299
Stack
ESPC
                                                                          0.004
                                                                          164.6
6213_B_1SG1
                                                                              1
Merom
Indiana
No Retirement Listed
Bituminous
                                                                            496
Stack
ESPC
                                                                          0.004
                                                                           55.0
6002_B_1
                                                                              1
James H Miller Jr
Alabama
No Retirement Listed
Subbituminous
                                                                            688
Stack
ESPC + WS
                                                                          0.004
                                                                          117.2
2442_B_4
                                                                              1
Four Corners
New Mexico
                                                                           2031
Subbituminous
                                                                            770
Stack
B
                                                                          0.004
                                                                          101.0
6002_B_2
                                                                              1
James H Miller Jr
Alabama
No Retirement Listed
Subbituminous
                                                                            695
Stack
ESPC + WS
                                                                          0.004
                                                                          139.0
1040_B_1, 1040_B_2
                                                                              2
Whitewater Valley
Indiana
No Retirement Listed
Bituminous
                                                                            100
Stack
ESPC + B
                                                                          0.004
                                                                            0.3
4158_B_BW43
                                                                              1
Dave Johnston
Wyoming
No Retirement Listed
Subbituminous
                                                                            220
Stack
B
                                                                          0.004
                                                                           28.4
3399_B_1
                                                                              1
Cumberland (TN)
Tennessee
                                                                           2029
Bituminous
                                                                           1239
Stack
ESPC
                                                                         0.0039
                                                                          101.5
8102_B_2
                                                                              1
Gavin Power, LLC
Ohio
No Retirement Listed
Bituminous, Subbituminous
                                                                           1361
Stack
ESPC
                                                                         0.0039
                                                                          126.3
10603_B_031
                                                                              1
Ebensburg Power
Pennsylvania
No Retirement Listed
Waste Coal
                                                                             50
Stack
B
                                                                         0.0039
                                                                            7.7
3130_B_1, 3130_B_2
                                                                              2
Seward (PA)
Pennsylvania
No Retirement Listed
Waste Coal
                                                                            520
Stack
B
                                                                         0.0038
                                                                           24.6
6179_B_3
                                                                              1
Fayette Power Project
Texas
No Retirement Listed
Subbituminous
                                                                            435
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0038
                                                                           66.6
6077_B_2
                                                                              1
Gerald Gentleman
Nebraska
No Retirement Listed
Subbituminous
                                                                            700
Stack
B
                                                                         0.0038
                                                                           76.0
55076_B_AA001, 55076_B_AA002
                                                                              2
Red Hills Generating Facility
Mississippi
No Retirement Listed
Lignite
                                                                            440
Stack
B
                                                                         0.0037
                                                                           28.7
10671_B_1A, 10671_B_1B, 10671_B_2A, 10671_B_2B
                                                                              4
River Valley
Oklahoma
No Retirement Listed
Bituminous, Subbituminous
                                                                            320
Stack
B
                                                                         0.0037
                                                                            4.1
2277_B_1
                                                                              1
Sheldon
Nebraska
No Retirement Listed
Subbituminous
                                                                            104
Stack
B
                                                                         0.0036
                                                                            7.8
1167_B_9
                                                                              1
Muscatine Plant #1
Iowa
No Retirement Listed
Subbituminous
                                                                            163
Stack
ESPC
                                                                         0.0036
                                                                           13.1
50888_B_BLR1
                                                                              1
Northampton Generating Company LP
Pennsylvania
No Retirement Listed
Waste Coal
                                                                            112
Stack
B
                                                                         0.0036
                                                                            4.8
1364_B_4
                                                                              1
Mill Creek (KY)
Kentucky
No Retirement Listed
Bituminous
                                                                            477
PM CEMS - 30-day rolling average
ESPC + B
                                                                         0.0035
                                                                           52.3
3948_B_1
                                                                              1
Mitchell (WV)
West Virginia
                                                                           2040
Bituminous
                                                                            770
Stack
ESPC
                                                                         0.0035
                                                                           46.6
3935_B_1
                                                                              1
John E Amos
West Virginia
                                                                           2040
Bituminous
                                                                            800
Stack
ESPC
                                                                         0.0035
                                                                           70.1
6469_B_B2
                                                                              1
Antelope Valley
North Dakota
No Retirement Listed
Lignite
                                                                            450
Stack
B
                                                                         0.0034
                                                                           63.8
6166_B_MB1, 6166_B_MB2
                                                                              2
Rockport
Indiana
                                                                           2029
Bituminous, Subbituminous
                                                                           2600
Stack
ESPC
                                                                         0.0034
                                                                           67.6
983_B_1, 983_B_2, 983_B_3
                                                                              3
Clifty Creek
Indiana
No Retirement Listed
Bituminous, Subbituminous
                                                                            588
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0032
                                                                           16.8
3403_B_2
                                                                              1
Gallatin (TN)
Tennessee
                                                                           2032
Bituminous, Subbituminous
                                                                            225
Stack
ESPC + B
                                                                         0.0031
                                                                           18.4
2168_B_MB2
                                                                              1
Thomas Hill
Missouri
No Retirement Listed
Subbituminous
                                                                            270
Stack
ESPC
                                                                          0.003
                                                                           26.3
10678_B_BLR1
                                                                              1
AES Warrior Run Cogeneration Facility
Maryland
No Retirement Listed
Bituminous, Waste Coal
                                                                            180
Stack
B
                                                                          0.003
                                                                           20.4
2168_B_MB3
                                                                              1
Thomas Hill
Missouri
No Retirement Listed
Subbituminous
                                                                            699
Stack
ESPC
                                                                          0.003
                                                                           79.1
1733_B_4
                                                                              1
Monroe (MI)
Michigan
                                                                           2040
Bituminous, Subbituminous, Petroleum Coke
                                                                            762
PM CEMS - 30-day rolling average
ESPC
                                                                          0.003
                                                                           59.6
6165_B_3
                                                                              1
Hunter
Utah
                                                                           2042
Bituminous
                                                                            460
Stack
B + WS
                                                                          0.003
                                                                           48.5
2107_B_1
                                                                              1
Sioux
Missouri
                                                                           2029
Bituminous, Subbituminous
                                                                            487
PM CEMS - 30-day rolling average
ESPC
                                                                          0.003
                                                                           39.6
703_B_3BLR
                                                                              1
Bowen
Georgia
                                                                           2035
Bituminous
                                                                            892
Stack
ESPC + B + WS
                                                                          0.003
                                                                           30.6
6064_B_N1
                                                                              1
Nearman Creek
Kansas
No Retirement Listed
Subbituminous
                                                                            240
PM CEMS - 30-day rolling average
ESPC + B
                                                                          0.003
                                                                           20.1
3403_B_1
                                                                              1
Gallatin (TN)
Tennessee
                                                                           2032
Bituminous, Subbituminous
                                                                            225
Stack
ESPC + B
                                                                          0.003
                                                                           19.0
4158_B_BW41
                                                                              1
Dave Johnston
Wyoming
No Retirement Listed
Subbituminous
                                                                            105
Stack
ESPC
                                                                          0.003
                                                                           12.3
6030_B_1
                                                                              1
Coal Creek
North Dakota
No Retirement Listed
Lignite
                                                                            574
Stack
ESPC
                                                                          0.003
                                                                           72.8
4158_B_BW42
                                                                              1
Dave Johnston
Wyoming
No Retirement Listed
Subbituminous
                                                                            105
Stack
ESPC
                                                                          0.003
                                                                           13.1
56596_B_1
                                                                              1
Wygen III
Wyoming
No Retirement Listed
Subbituminous
                                                                            100
Stack
B
                                                                          0.003
                                                                           13.4
6165_B_2
                                                                              1
Hunter
Utah
                                                                           2042
Bituminous
                                                                            430
Stack
B
                                                                          0.003
                                                                           44.5
10743_B_CFB1, 10743_B_CFB2
                                                                              2
Morgantown Energy Facility
West Virginia
No Retirement Listed
Bituminous, Waste Coal
                                                                             50
Stack
B
                                                                          0.003
                                                                            4.7
56319_B_1
                                                                              1
Wygen 2
Wyoming
                                                                           2048
Subbituminous
                                                                             90
Stack
B
                                                                          0.003
                                                                           13.4
2828_B_1
                                                                              1
Cardinal
Ohio
                                                                           2030
Bituminous
                                                                            585
Stack
ESPC
                                                                          0.003
                                                                           60.0
6768_B_1
                                                                              1
Sikeston Power Station
Missouri
No Retirement Listed
Subbituminous
                                                                            240
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0029
                                                                           23.6
130_B_4
                                                                              1
Cross
South Carolina
No Retirement Listed
Bituminous
                                                                            600
Stack
ESPC + WS
                                                                         0.0029
                                                                           45.2
2442_B_5
                                                                              1
Four Corners
New Mexico
                                                                           2031
Subbituminous
                                                                            770
Stack
B
                                                                         0.0029
                                                                           63.4
6772_B_1
                                                                              1
Hugo
Oklahoma
No Retirement Listed
Subbituminous
                                                                            440
Stack
ESPC
                                                                         0.0029
                                                                           43.9
298_B_LIM2
                                                                              1
Limestone
Texas
                                                                           2029
Lignite, Subbituminous
                                                                            858
Stack
ESPC
                                                                         0.0029
                                                                           78.4
50776_B_BLR1, 50776_B_BLR2
                                                                              2
Panther Creek Energy Facility
Pennsylvania
No Retirement Listed
Waste Coal
                                                                             84
Stack
B
                                                                         0.0028
                                                                            0.8
6195_B_1
                                                                              1
John Twitty Energy Center
Missouri
No Retirement Listed
Subbituminous
                                                                            184
Stack
B
                                                                         0.0028
                                                                           13.5
6077_B_1
                                                                              1
Gerald Gentleman
Nebraska
No Retirement Listed
Subbituminous
                                                                            665
Stack
B
                                                                         0.0028
                                                                           53.6
3948_B_2
                                                                              1
Mitchell (WV)
West Virginia
                                                                           2040
Bituminous
                                                                            790
Stack
ESPC
                                                                         0.0027
                                                                           62.3
6068_B_1
                                                                              1
Jeffrey Energy Center
Kansas
                                                                           2039
Subbituminous
                                                                            728
Stack
ESPC
                                                                         0.0027
                                                                           48.1
8223_B_3
                                                                              1
Springerville
Arizona
No Retirement Listed
Subbituminous
                                                                            417
Stack
B
                                                                         0.0027
                                                                           34.7
1364_B_3
                                                                              1
Mill Creek (KY)
Kentucky
No Retirement Listed
Bituminous
                                                                            391
PM CEMS - 30-day rolling average
ESPC + B
                                                                         0.0026
                                                                           24.9
130_B_3
                                                                              1
Cross
South Carolina
No Retirement Listed
Bituminous
                                                                            600
Stack
ESPC + WS
                                                                         0.0026
                                                                           44.5
6190_B_2
                                                                              1
Brame Energy Center
Louisiana
No Retirement Listed
Subbituminous
                                                                            493
Stack
ESPH + B
                                                                         0.0026
                                                                           32.4
130_B_1
                                                                              1
Cross
South Carolina
No Retirement Listed
Bituminous
                                                                            580
PM CEMS - 30-day rolling average
ESPC + WS
                                                                         0.0025
                                                                           29.9
2727_B_4
                                                                              1
Marshall (NC)
North Carolina
                                                                           2034
Bituminous
                                                                            660
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0025
                                                                           41.3
2240_B_8
                                                                              1
Lon Wright
Nebraska
No Retirement Listed
Subbituminous
                                                                             82
Stack
ESPH + B
                                                                         0.0025
                                                                            5.1
3149_B_2
                                                                              1
TalenEnergy Montour
Pennsylvania
No Retirement Listed
Bituminous
                                                                            752
Stack
ESPC
                                                                         0.0024
                                                                            8.3
8042_B_1
                                                                              1
Belews Creek
North Carolina
                                                                           2038
Bituminous
                                                                           1110
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0023
                                                                           48.1
983_B_4, 983_B_5, 983_B_6
                                                                              3
Clifty Creek
Indiana
No Retirement Listed
Bituminous, Subbituminous
                                                                            588
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0023
                                                                           12.8
298_B_LIM1
                                                                              1
Limestone
Texas
                                                                           2029
Lignite, Subbituminous
                                                                            831
Stack
ESPC
                                                                         0.0023
                                                                           49.8
8222_B_B1
                                                                              1
Coyote
North Dakota
No Retirement Listed
Lignite
                                                                            429
Stack
B
                                                                         0.0023
                                                                           26.7
6090_B_3
                                                                              1
Sherburne County
Minnesota
                                                                           2030
Subbituminous
                                                                            876
Stack
B
                                                                         0.0023
                                                                           44.2
3403_B_4
                                                                              1
Gallatin (TN)
Tennessee
                                                                           2032
Bituminous, Subbituminous
                                                                            263
Stack
ESPC + B
                                                                         0.0022
                                                                           17.1
2277_B_2
                                                                              1
Sheldon
Nebraska
No Retirement Listed
Subbituminous
                                                                            115
Stack
B
                                                                         0.0022
                                                                            5.7
3149_B_1
                                                                              1
TalenEnergy Montour
Pennsylvania
No Retirement Listed
Bituminous
                                                                            752
Stack
ESPC
                                                                         0.0021
                                                                           14.9
7097_B_BLR1
                                                                              1
J K Spruce
Texas
No Retirement Listed
Subbituminous
                                                                            560
Unknown
B
                                                                         0.0021
                                                                           25.6
2079_B_5A
                                                                              1
Hawthorn
Missouri
No Retirement Listed
Subbituminous
                                                                            564
Stack
B
                                                                         0.0021
                                                                           31.4
56609_B_1
                                                                              1
Dry Fork Station
Wyoming
No Retirement Listed
Subbituminous
                                                                            380
Stack
B
                                                                         0.0021
                                                                           29.9
2721_B_5
                                                                              1
James E. Rogers Energy Complex
North Carolina
No Retirement Listed
Bituminous, Natural Gas
                                                                            544
PM CEMS - 30-day rolling average
ESPC
                                                                          0.002
                                                                           18.7
1241_B_2
                                                                              1
La Cygne
Kansas
                                                                           2039
Bituminous, Subbituminous
                                                                            662
PM CEMS - 30-day rolling average
B
                                                                          0.002
                                                                           33.8
667_B_2
                                                                              1
Northside Generating Station
Florida
No Retirement Listed
Bituminous, Petroleum Coke
                                                                            293
Stack
B
                                                                          0.002
                                                                            7.4
56224_B_BLR100
                                                                              1
TS Power Plant
Nevada
No Retirement Listed
Subbituminous
                                                                            218
Stack
B
                                                                          0.002
                                                                           11.3
703_B_4BLR
                                                                              1
Bowen
Georgia
                                                                           2035
Bituminous
                                                                            892
Stack
ESPC + B + WS
                                                                          0.002
                                                                           36.2
56068_B_18
                                                                              1
Elm Road Generating Station
Wisconsin
No Retirement Listed
Bituminous, Subbituminous
                                                                            633
PM CEMS - 30-day rolling average
WESP + B
                                                                          0.002
                                                                           40.4
6041_B_1
                                                                              1
H L Spurlock
Kentucky
No Retirement Listed
Bituminous
                                                                            300
PM CEMS - 30-day rolling average
ESPC + WESP
                                                                          0.002
                                                                           13.6
8219_B_1
                                                                              1
Ray D Nixon
Colorado
                                                                           2029
Bituminous, Subbituminous
                                                                            208
Stack
B
                                                                          0.002
                                                                           12.0
6030_B_2
                                                                              1
Coal Creek
North Dakota
No Retirement Listed
Lignite
                                                                            573
Stack
ESPC
                                                                          0.002
                                                                           38.4
6101_B_BW91
                                                                              1
Wyodak
Wyoming
                                                                           2039
Subbituminous
                                                                            332
Stack
B
                                                                          0.002
                                                                           23.4
6041_B_2
                                                                              1
H L Spurlock
Kentucky
No Retirement Listed
Bituminous
                                                                            510
PM CEMS - 30-day rolling average
ESPH + WESP
                                                                          0.002
                                                                           23.3
6065_B_1
                                                                              1
Iatan
Missouri
                                                                           2039
Subbituminous
                                                                            700
PM CEMS - 30-day rolling average
B
                                                                          0.002
                                                                           25.2
6257_B_2
                                                                              1
Scherer
Georgia
No Retirement Listed
Subbituminous
                                                                            860
Stack
ESPH + B + WS
                                                                          0.002
                                                                           43.6
2367_B_4
                                                                              1
Schiller
New Hampshire
No Retirement Listed
Bituminous
                                                                             48
Stack
ESPC
                                                                          0.002
                                                                            0.4
7210_B_COP1
                                                                              1
Cope
South Carolina
No Retirement Listed
Bituminous
                                                                            415
Stack
B
                                                                          0.002
                                                                           18.0
55479_B_3
                                                                              1
Wygen 1
Wyoming
No Retirement Listed
Subbituminous
                                                                             85
Stack
B
                                                                          0.002
                                                                            8.5
55749_B_PC1
                                                                              1
Hardin Generator Project
Montana
No Retirement Listed
Subbituminous
                                                                            107
Stack
B
                                                                          0.002
                                                                            2.2
963_B_41
                                                                              1
Dallman
Illinois
No Retirement Listed
Bituminous
                                                                            208
Stack
B
                                                                         0.0019
                                                                           10.1
6095_B_2
                                                                              1
Sooner
Oklahoma
                                                                           2045
Subbituminous
                                                                            520
Stack
ESPC
                                                                         0.0019
                                                                           18.0
108_B_SGU1
                                                                              1
Holcomb
Kansas
No Retirement Listed
Subbituminous
                                                                            359
Stack
B
                                                                         0.0019
                                                                           10.8
2721_B_6
                                                                              1
James E. Rogers Energy Complex
North Carolina
                                                                           2048
Bituminous, Natural Gas
                                                                            844
PM CEMS - 30-day rolling average
B
                                                                         0.0018
                                                                           37.8
6204_B_1
                                                                              1
Laramie River Station
Wyoming
No Retirement Listed
Subbituminous
                                                                            570
Stack
ESPH
                                                                         0.0018
                                                                           26.5
2168_B_MB1
                                                                              1
Thomas Hill
Missouri
No Retirement Listed
Subbituminous
                                                                            165
Stack
ESPC
                                                                         0.0018
                                                                           11.0
2876_B_1, 2876_B_2
                                                                              2
Kyger Creek
Ohio
No Retirement Listed
Bituminous, Subbituminous
                                                                            386
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0018
                                                                           10.1
7097_B_BLR2
                                                                              1
J K Spruce
Texas
No Retirement Listed
Subbituminous
                                                                            785
Unknown
B
                                                                         0.0017
                                                                           41.2
3935_B_3
                                                                              1
John E Amos
West Virginia
                                                                           2040
Bituminous
                                                                           1300
Stack
ESPC
                                                                         0.0017
                                                                           54.5
6139_B_3
                                                                              1
Welsh
Texas
                                                                           2038
Subbituminous
                                                                            528
Stack
ESPH + B
                                                                         0.0017
                                                                           22.0
3403_B_3
                                                                              1
Gallatin (TN)
Tennessee
                                                                           2032
Bituminous, Subbituminous
                                                                            263
Stack
ESPC + B
                                                                         0.0016
                                                                            9.0
3470_B_WAP8
                                                                              1
W A Parish
Texas
No Retirement Listed
Subbituminous
                                                                            610
Stack
B
                                                                         0.0015
                                                                           33.2
2828_B_2
                                                                              1
Cardinal
Ohio
No Retirement Listed
Bituminous
                                                                            585
Stack
ESPC
                                                                         0.0014
                                                                           22.7
6139_B_1
                                                                              1
Welsh
Texas
                                                                           2038
Subbituminous
                                                                            528
Stack
ESPH + B
                                                                         0.0013
                                                                           23.1
667_B_1
                                                                              1
Northside Generating Station
Florida
No Retirement Listed
Bituminous, Petroleum Coke
                                                                            293
Stack
B
                                                                         0.0012
                                                                           13.0
8223_B_4
                                                                              1
Springerville
Arizona
No Retirement Listed
Subbituminous
                                                                            415
Stack
B
                                                                         0.0012
                                                                           10.0
2727_B_3
                                                                              1
Marshall (NC)
North Carolina
                                                                           2034
Bituminous
                                                                            658
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0011
                                                                           13.4
6034_B_2
                                                                              1
Belle River
Michigan
                                                                           2029
Subbituminous
                                                                            635
PM CEMS - 30-day rolling average
ESPC
                                                                         0.0011
                                                                           22.9
60_B_2
                                                                              1
Whelan Energy Center
Nebraska
No Retirement Listed
Subbituminous
                                                                            232
PM CEMS - 30-day rolling average
B
                                                                         0.0011
                                                                            6.7
4125_B_9
                                                                              1
Manitowoc
Wisconsin
No Retirement Listed
Bituminous, Subbituminous, Petroleum Coke
                                                                             58
PM CEMS - 30-day rolling average
B + C
                                                                          0.001
                                                                            0.9
4078_B_4
                                                                              1
Weston
Wisconsin
No Retirement Listed
Subbituminous
                                                                            550
PM CEMS - 30-day rolling average
B
                                                                          0.001
                                                                           15.2
6248_B_1
                                                                              1
Pawnee
Colorado
No Retirement Listed
Subbituminous
                                                                            505
Stack
B
                                                                          0.001
                                                                           14.7
3935_B_2
                                                                              1
John E Amos
West Virginia
                                                                           2040
Bituminous
                                                                            800
Stack
ESPC
                                                                          0.001
                                                                           19.7
56068_B_19
                                                                              1
Elm Road Generating Station
Wisconsin
No Retirement Listed
Bituminous, Subbituminous
                                                                            633
PM CEMS - 30-day rolling average
WESP + B
                                                                          0.001
                                                                           19.6
165_B_2
                                                                              1
GREC
Oklahoma
No Retirement Listed
Subbituminous
                                                                            492
Unknown
B
                                                                          0.001
                                                                            0.8
6195_B_2
                                                                              1
John Twitty Energy Center
Missouri
No Retirement Listed
Subbituminous
                                                                            275
Stack
B
                                                                          0.001
                                                                            5.6
7343_B_4
                                                                              1
George Neal South
Iowa
No Retirement Listed
Subbituminous
                                                                            645
Stack
ESPC + B
                                                                          0.001
                                                                           12.2
3470_B_WAP5
                                                                              1
W A Parish
Texas
No Retirement Listed
Subbituminous
                                                                            659
Stack
B
                                                                          0.001
                                                                           14.6
56786_B_1
                                                                              1
Spiritwood Station
North Dakota
No Retirement Listed
Lignite
                                                                             92
Stack
B
                                                                         0.0009
                                                                            2.5
6194_B_171B
                                                                              1
Tolk
Texas
                                                                           2032
Subbituminous
                                                                            532
Stack
B
                                                                         0.0007
                                                                            4.2
50835_B_1
                                                                              1
TES Filer City Station
Michigan
No Retirement Listed
Bituminous
                                                                             30
Stack
B
                                                                         0.0006
                                                                            0.9
50835_B_2
                                                                              1
TES Filer City Station
Michigan
No Retirement Listed
Bituminous
                                                                             30
Stack
B
                                                                         0.0006
                                                                            1.0
6138_B_1
                                                                              1
Flint Creek
Arkansas
                                                                           2038
Subbituminous
                                                                            528
Stack
ESPH + B
                                                                        0.00059
                                                                            7.6
6194_B_172B
                                                                              1
Tolk
Texas
                                                                           2032
Subbituminous
                                                                            535
Stack
B
                                                                        0.00058
                                                                            5.4
6098_B_1
                                                                              1
Big Stone
South Dakota
No Retirement Listed
Subbituminous
                                                                            474
Stack
B
                                                                        0.00021
                                                                            2.5
3470_B_WAP6
                                                                              1
W A Parish
Texas
No Retirement Listed
Subbituminous
                                                                            653
Stack
B
                                                                         0.0002
                                                                            3.8
3470_B_WAP7
                                                                              1
W A Parish
Texas
No Retirement Listed
Subbituminous
                                                                            577
Stack
B
                                                                        0.00019
                                                                            3.2
4271_B_B1
                                                                              1
John P Madgett
Wisconsin
No Retirement Listed
Subbituminous
                                                                            390
PM CEMS - 30-day rolling average
ESPH + B
                                                                          0.000
                                                                            0.0
7213_B_1
                                                                              1
Clover
Virginia
                                                                           2045
Bituminous
                                                                            440
PM CEMS - 30-day rolling average
B + WS
                                                                          0.000
                                                                              0

    Appendix C
                                 Plant Details
                                0.015 lb/MMBtu
                                0.010 lb/MMBtu
                                0.006 lb/MMBtu
                                UniqueID_Final
                                  Plant Name
                                  PM Control
                      Baseline fPM Emissions (tons/year)
                      fPM Emission Reductions (tons/year)
                     Annualized Cost-Low Estimate ($/year)
                    Annualized Cost-High Estimate ($/year)
                      fPM Emission Reductions (tons/year)
                     Annualized Cost-Low Estimate ($/year)
                    Annualized Cost-High Estimate ($/year)
                      fPM Emission Reductions (tons/year)
                           Annualized Cost ($/year)
6076_B_4
Colstrip
WS
                                                                          587.0
                                                                          166.6
                                    843600
                                                                          306.3
                                   19058306
                                                                          528.3
                                                                       19058306
10343_B_SG-101
Foster Wheeler Mt Carmel Cogen
B
                                                                           13.2
                                                                            8.8
                                     37954
                                                                            8.8
                                     37954
                                                                            8.8
                                                                          37954
6076_B_3
Colstrip
WS
                                                                          497.3
                                                                           82.3
                                    843600
                                                                          220.5
                                   18992866
                                                                          442.1
                                                                       18992866
2103_B_2
Labadie
ESPC
                                                                          269.7
                                                                           33.2
                                                                        3228885
                                                                        4663945
                                                                          112.5
                                                                        5381475
                                                                        7175300
                                                                          238.0
                                                                       14852871
2103_B_1
Labadie
ESPC
                                                                          280.4
                                                                           34.5
                                                                        3228885
                                                                        4663945
                                                                          116.9
                                                                        5381475
                                                                        7175300
                                                                          247.4
                                                                       14852871
2103_B_4
Labadie
ESPC
                                                                          339.0
                                                                           41.7
                                                                        2828610
                                                                        4085770
                                                                          141.4
                                                                        4714350
                                                                        6285800
                                                                          299.1
                                                                       13011606
2103_B_3
Labadie
ESPC
                                                                          367.8
                                                                           45.2
                                                                        2828610
                                                                        4085770
                                                                          153.4
                                                                        4714350
                                                                        6285800
                                                                          324.5
                                                                       13011606
976_B_123
Marion
B
                                                                           78.8
                                                                           51.0
                                     42026
                                                                           51.0
                                     42026
                                                                           51.0
                                                                          42026
10113_B_CFB1, 10113_B_CFB2
John B Rich Memorial Power Station
B
                                                                           30.9
 
 
 
                                                                           18.5
                                     24077
                                                                           18.5
                                                                          24077
6823_B_W1
D B Wilson
ESPC
                                                                          234.8
 
 
 
                                                                           78.3
                                                                        3565350
                                                                        4753800
                                                                          203.5
                                                                       11118238
50611_B_031
Westwood Generation LLC
B
                                                                            3.0
 
 
 
                                                                            1.8
                                     14840
                                                                            1.8
                                                                          14840
6146_B_1
Martin Lake
ESPC
                                                                          337.5
 
 
 
                                                                           96.4
                                                                        6840000
                                                                        9120000
                                                                          289.3
                                                                       23065501
6041_B_3
H L Spurlock
B
                                                                           71.0
 
 
 
                                                                           35.5
                                    188376
                                                                           35.5
                                                                         188376
3954_B_3
Mt Storm
ESPC + WS
                                                                          112.3
 
 
 
                                                                           18.7
                                                                        2667600
                                                                        3853200
                                                                           93.6
                                                                       12541047
6146_B_3
Martin Lake
ESPC
                                                                          284.9
 
 
 
                                                                           47.5
                                                                        4129650
                                                                        5965050
                                                                          237.4
                                                                       23091952
1082_B_3
Walter Scott Jr Energy Center
ESPC + B
                                                                          265.4
 
 
 
                                                                          120.7
                                    471090
                                                                          120.7
                                                                         471090
3954_B_1, 3954_B_2
Mt Storm
ESPC + WS
                                                                          138.1
 
 
 
                                                                           12.6
                                                                         758556
                                                                        3413502
                                                                          113.0
                                                                       25882051
1893_B_4
Clay Boswell
B
                                                                          198.5
 
 
 
                                                                           90.2
                                    296552
                                                                           90.2
                                                                         296552
10143_B_ABB01
Colver Power Project
B
                                                                           48.6
 
 
 
 
 
 
                                                                           19.4
                                                                          60221
54634_B_1
St Nicholas Cogen Project
B
                                                                           53.6
 
 
 
 
 
 
                                                                           21.4
                                                                          69525
8102_B_1
Gavin Power, LLC
ESPC
                                                                          428.9
 
 
 
 
 
 
                                                                          343.1
                                                                       28714416
2823_B_B2
Milton R Young
ESPC
                                                                          192.3
 
 
 
 
 
 
                                                                          153.8
                                                                       14429784
6018_B_2
East Bend
ESPH
                                                                          142.9
 
 
 
 
 
 
                                                                          114.0
                                                                       12592800
6113_B_3
Gibson
ESPC
                                                                          112.6
 
 
 
 
 
 
                                                                           89.6
                                                                       29360520
6065_B_2
Iatan
B
                                                                          241.5
 
 
 
 
 
 
                                                                           80.5
                                                                         470496
645_B_BB04
Big Bend
ESPC
                                                                           73.7
 
 
 
 
 
 
                                                                           57.4
                                                                       11298116
6068_B_3
Jeffrey Energy Center
ESPC
                                                                          136.1
 
 
 
 
 
 
                                                                          105.8
                                                                       31643248
6177_B_U2B
Coronado
ESPH
                                                                           65.3
 
 
 
 
 
 
                                                                           50.1
                                                                       14321180
6177_B_U1B
Coronado
ESPH
                                                                           49.4
 
 
 
 
 
 
                                                                           37.9
                                                                       14184260
6183_B_SM-1
San Miguel
ESPC
                                                                          117.0
 
 
 
 
 
 
                                                                           88.5
                                                                       13670942
6705_B_4
Warrick
ESPC
                                                                           79.7
 
 
 
 
 
 
                                                                           60.2
                                                                        8631293
628_B_5
Crystal River
ESPC
                                                                          166.2
 
 
 
 
 
 
                                                                          125.1
                                                                       18158960
628_B_4
Crystal River
ESPC
                                                                          183.7
 
 
 
 
 
 
                                                                          138.3
                                                                       18309080
1356_B_2, 1356_B_3
Ghent
ESPH + B
                                                                          104.8
 
 
 
 
 
 
                                                                           27.2
                                                                         470941
6146_B_2
Martin Lake
ESPC
                                                                          162.1
 
 
 
 
 
 
                                                                          121.5
                                                                       22745693
6180_B_1
Oak Grove (TX)
B
                                                                          242.0
 
 
 
 
 
 
                                                                           60.5
                                                                         527500
6204_B_2
Laramie River Station
ESPH
                                                                          170.0
 
 
 
 
 
 
                                                                          127.5
                                                                       14614122
136_B_2
Seminole (FL)
ESPC
                                                                          129.7
 
 
 
 
 
 
                                                                           97.3
                                                                       15062016
2364_B_1, 2364_B_2
Merrimack
ESPC
                                                                            3.3
 
 
 
 
 
 
                                                                            2.4
                                                                       13168855
1393_B_6
R S Nelson
ESPC
                                                                           89.2
 
 
 
 
 
 
                                                                           66.6
                                                                       15608736
8066_B_BW73
Jim Bridger
ESPC
                                                                          129.4
 
 
 
 
 
 
                                                                           96.2
                                                                       12699486
8066_B_BW74
Jim Bridger
ESPC
                                                                          129.0
 
 
 
 
 
 
                                                                           95.9
                                                                       12809040
6664_B_101
Louisa
ESPH + B
                                                                          133.9
 
 
 
 
 
 
                                                                           23.8
                                                                         400485
7030_B_U2
Major Oak Power
B
                                                                           48.0
 
 
 
 
 
 
                                                                            6.9
                                                                         105684
1733_B_2
Monroe (MI)
ESPC
                                                                          148.7
 
 
 
 
 
 
                                                                          106.2
                                                                       15895972
4078_B_3
Weston
B
                                                                           38.2
 
 
 
 
 
 
                                                                            5.5
                                                                         208448
2817_B_1
Leland Olds
ESPC
                                                                           49.3
 
 
 
 
 
 
                                                                           35.2
                                                                        8203024
50974_B_UNIT 1
Scrubgrass Generating Plant
B + C
                                                                           12.6
 
 
 
 
 
 
                                                                            1.8
                                                                          32632
50974_B_UNIT 2
Scrubgrass Generating Plant
B + C
                                                                           11.8
 
 
 
 
 
 
                                                                            1.7
                                                                          32634
7030_B_U1
Major Oak Power
B
                                                                           49.9
 
 
 
 
 
 
                                                                            7.1
                                                                         105684
6469_B_B1
Antelope Valley
B
                                                                          106.1
 
 
 
 
 
 
                                                                           15.2
                                                                         306534
7790_B_1-1
Bonanza
B
                                                                          139.6
 
 
 
 
 
 
                                                                           19.9
                                                                         299353
8069_B_2
Huntington
B
                                                                           76.8
 
 
 
 
 
 
                                                                           10.0
                                                                         258387
8042_B_2
Belews Creek
ESPC
                                                                          131.3
 
 
 
 
 
 
                                                                           93.2
                                                                       18511470
60_B_1
Whelan Energy Center
ESPC
                                                                           13.7
 
 
 
 
 
 
                                                                            9.6
                                                                        3351478
470_B_3
Comanche (CO)
B
                                                                          151.1
 
 
 
 
 
 
                                                                           17.8
                                                                         434070
6096_B_2
Nebraska City
B
                                                                          133.5
 
 
 
 
 
 
                                                                           15.7
                                                                         333738
6009_B_2
White Bluff
ESPC
                                                                          117.3
 
 
 
 
 
 
                                                                           80.6
                                                                       38368512
56611_B_S01
Sandy Creek Energy Station
B
                                                                          197.8
 
 
 
 
 
 
                                                                            9.6
                                                                         452490
6179_B_2
Fayette Power Project
ESPC
                                                                          133.7
 
 
 
 
 
 
                                                                           89.9
                                                                       15472621
1733_B_1
Monroe (MI)
ESPC
                                                                          135.4
 
 
 
 
 
 
                                                                           91.0
                                                                       15587512
                                       
TOTAL
                                       
                                                                         9189.0
                                                                          463.2
                                                                       13882170
                                                                       17499430
                                                                         1630.9
                                                                       77278893
                                                                       54027752
                                                                         6163.4
                                                                      632535787