[Federal Register Volume 85, Number 4 (Tuesday, January 7, 2020)]
[Rules and Regulations]
[Pages 640-642]
[FR Doc No: 2019-28013]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 25

[Docket No. FAA-2019-1103; Special Conditions No. 25-764-SC]

Special Conditions: Airbus Defense and Space Model No. C-295
Airplane; Non-Rechargeable Lithium Batteries

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final special conditions; request for comments.

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SUMMARY: These special conditions are issued for the Airbus Defense and
Space (Airbus) Model C-295 airplane. This airplane will have novel or
unusual design features when compared to the state of technology
envisioned in the airworthiness standards for transport category
airplanes. The Airbus Model C-295 airplane will have non-rechargeable
lithium battery installations. The applicable airworthiness regulations
do not contain adequate or appropriate safety standards for this design
feature. These special conditions contain the additional safety
standards that the Administrator considers necessary to establish a
level of safety equivalent to that established by the existing
airworthiness standards.

DATES: This action is effective on Airbus on January 7, 2020. Send
comments on or before February 21, 2020.

ADDRESSES: Send comments identified by Docket No. FAA-2019-1103 using
any of the following methods:
     Federal eRegulations Portal: Go to http://www.regulations.gov/ and follow the online instructions for sending
your comments electronically.
     Mail: Send comments to Docket Operations, M-30, U.S.
Department of Transportation (DOT), 1200 New Jersey Avenue SE, Room
W12-140, West Building Ground Floor, Washington, DC 20590-0001.
     Hand Delivery or Courier: Take comments to Docket
Operations in Room W12-140 of the West Building Ground Floor at 1200
New Jersey Avenue SE, Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
     Fax: Fax comments to Docket Operations at<PHONE_NUMBER>.
    Privacy: The FAA will post all comments it receives, without
change, to http://www.regulations.gov/, including any personal
information the commenter provides. Using the search function of the
docket website, anyone can find and read the electronic form of all
comments received into any FAA docket, including the name of the
individual sending the comment (or signing the comment for an
association, business, labor union, etc.). DOT's complete Privacy Act
Statement can be found in the Federal Register published on April 11,
2000 (65 FR 19477-19478).
    Docket: Background documents or comments received may be read at
http://www.regulations.gov/ at any time. Follow the online instructions
for accessing the docket or go to Docket Operations in Room W12-140 of
the West Building Ground Floor at 1200 New Jersey Avenue SE,
Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Nazih Khaouly, Airplane and Flight
Crew Interface Section, AIR-671, Transport Standards Branch, Policy and
Innovation Division, Aircraft Certification Service, Federal Aviation
Administration, 2200 South 216th Street, Des Moines, Washington 98198;
telephone and fax<PHONE_NUMBER>; email<EMAIL_ADDRESS>
SUPPLEMENTARY INFORMATION:

Emergency Locator Transmitters on Airplanes Operating in Alaska

    Section 1205 of the FAA Reauthorization Act of 1996 requires the
FAA to consider the extent to which Alaska is not served by
transportation modes other than aviation and to establish appropriate
regulatory distinctions when modifying airworthiness regulations that
affect intrastate aviation in Alaska. In consideration of this
requirement and the overall impact on safety, the FAA does not intend
to require non-rechargeable lithium battery special conditions for
design changes that only replace a 121.5 megahertz (MHz) emergency
locator transmitter (ELT) with a 406 MHz ELT that meets Technical
Standard Order C126b, or later revision, on transport airplanes
operating only in Alaska. This will support our efforts of encouraging
operators in Alaska to upgrade to a 406 MHz ELT. These ELTs provide
significantly improved accuracy for lifesaving services to locate an
accident site in Alaskan terrain. The FAA considers that the safety
benefits from upgrading to a 406 MHz ELT for

Alaskan operations will outweigh the battery fire risk.

Comments Invited

    The substance of these special conditions has been published in the
Federal Register for public comment in several prior instances with no
substantive comments received. Therefore, the FAA has determined that
prior public notice and comment are unnecessary, and finds that, for
the same reason, good cause exists for adopting these special
conditions upon publication in the Federal Register.
    The FAA invites interested people to take part in this rulemaking
by sending written comments, data, or views. The most helpful comments
reference a specific portion of the special conditions, explain the
reason for any recommended change, and include supporting data.
    The FAA will consider all comments received by the closing date for
comments. The FAA may change these special conditions based on the
comments received.

Background

    On September 19, 2014, Airbus applied to the European Union
Aviation Safety Agency (EASA) for a change to EASA Type Certificate No.
EASA.A.186 to install non-rechargeable lithium batteries in the Airbus
Model C-295 airplane. On December 18, 2018, EASA forwarded an Airbus
application to the FAA to validate this same change in the Model C-295
airplane for FAA Type Certificate No. A21NM. On November 22, 2019,
Airbus filed for an extension to their original EASA application, which
resulted in an agreement that December 20, 2014 be the new application
date. The Airbus Model C-295 airplane is a twin engine, transport
category airplane configured for freighter use, with a maximum takeoff
weight of 46,300 pounds.
    The FAA is issuing these special conditions for non-rechargeable
lithium battery installations on the Airbus Model C-295 airplane. The
current battery requirements in title 14, Code of Federal Regulations
(14 CFR) part 25 are inadequate for addressing an airplane with non-
rechargeable lithium batteries.

Type Certification Basis

    Under the provisions of 14 CFR 21.101, Airbus must show that the
Model C-295 airplane, as changed, continues to meet the applicable
provisions of the regulations listed in Type Certificate No. A21NM, or
the applicable regulations in effect on the date of application for the
change, except for earlier amendments as agreed upon by the FAA.
    If the Administrator finds that the applicable airworthiness
regulations (e.g., 14 CFR part 25) do not contain adequate or
appropriate safety standards for the Airbus Model C-295 airplane
because of a novel or unusual design feature, special conditions are
prescribed under the provisions of Sec.  21.16.
    Special conditions are initially applicable to the model for which
they are issued. Should the type certificate for that model be amended
later to include any other model that incorporates the same novel or
unusual design feature, or should any other model already included on
the same type certificate be modified to incorporate the same novel or
unusual design feature, these special conditions would also apply to
the other model under Sec.  21.101.
    In addition to the applicable airworthiness regulations and special
conditions, the Airbus Model C-295 airplane must comply with the fuel
vent and exhaust emission requirements of 14 CFR part 34, and the noise
certification requirements of 14 CFR part 36.
    The FAA issues special conditions, as defined in 14 CFR 11.19, in
accordance with Sec.  11.38, and they become part of the type
certification basis under Sec.  21.101.

Novel or Unusual Design Features

    The Airbus Model C-295 airplane will incorporate the following
novel or unusual design features:
    The Airbus C-295 airplane will have non-rechargeable lithium
battery installations.

Discussion

    The FAA derived the current regulations governing installation of
batteries in transport category airplanes from Civil Air Regulations
(CAR) 4b.625(d) as part of the recodification of CAR 4b that
established 14 CFR part 25 in February 1965. This recodification
basically reworded the CAR 4b battery requirements, which are currently
in Sec.  25.1353(b)(1) through (4). Non-rechargeable lithium batteries
are novel and unusual with respect to the state of technology
considered when these requirements were codified. These batteries
introduce higher energy levels into airplane systems through new
chemical compositions in various battery cell sizes and construction.
Interconnection of these cells in battery packs introduces failure
modes that require unique design considerations, such as provisions for
thermal management.
    Recent events involving rechargeable and non-rechargeable lithium
batteries prompted the FAA to initiate a broad evaluation of these
energy storage technologies. In January 2013, two independent events
involving rechargeable lithium-ion batteries revealed unanticipated
failure modes. A National Transportation Safety Board (NTSB) letter to
the FAA, dated May 22, 2014, which is available at http://www.ntsb.gov,
filename A-14-032-036.pdf, describes these events.
    On July 12, 2013, an event involving a non-rechargeable lithium
battery in an ELT installation demonstrated unanticipated failure
modes. The United Kingdom's Air Accidents Investigation Branch Bulletin
S5/2013 describes this event.
    Some known uses of rechargeable and non-rechargeable lithium
batteries on airplanes include:
     Flight deck and avionics systems such as displays, global
positioning systems, cockpit voice recorders, flight data recorders,
underwater locator beacons, navigation computers, integrated avionics
computers, satellite network and communication systems, communication
management units, and remote-monitor electronic line-replaceable units;
     Cabin safety, entertainment, and communications equipment,
including emergency locator transmitters, life rafts, escape slides,
seatbelt air bags, cabin management systems, Ethernet switches, routers
and media servers, wireless systems, internet and in-flight
entertainment systems, satellite televisions, remotes, and handsets;
     Systems in cargo areas including door controls, sensors,
video surveillance equipment, and security systems.
    Some known potential hazards and failure modes associated with non-
rechargeable lithium batteries are:
     Internal failures: In general, these batteries are
significantly more susceptible to internal failures that can result in
self-sustaining increases in temperature and pressure (i.e., thermal
runaway) than their nickel-cadmium or lead-acid counterparts. The
metallic lithium can ignite, resulting in a self-sustaining fire or
explosion.
     Fast or imbalanced discharging: Fast discharging or an
imbalanced discharge of one cell of a multi-cell battery may create an
overheating condition that results in an uncontrollable venting
condition, which in turn leads to a thermal event or an explosion.

     Flammability: Unlike nickel-cadmium and lead-acid
batteries, lithium batteries use higher energy and current in an
electrochemical system that can be configured to maximize energy
storage of lithium. They also use liquid electrolytes that can be
extremely flammable. The electrolyte, as well as the electrodes, can
serve as a source of fuel for an external fire if the battery casing is
breached.
    Special condition no. 1 of these special conditions requires that
each individual cell within a non-rechargeable lithium battery be
designed to maintain safe temperatures and pressures. Special condition
no. 2 addresses these same issues but for the entire battery. Special
condition no. 2 also requires the battery be designed to prevent
propagation of a thermal event, such as self-sustained, uncontrollable
increases in temperature or pressure from one cell to adjacent cells.
    Special condition nos. 1 and 2 are intended to ensure that the non-
rechargeable lithium battery and its cells are designed to eliminate
the potential for uncontrollable failures. However, a certain number of
failures will occur due to various factors beyond the control of the
battery designer. Therefore, other special conditions are intended to
protect the airplane and its occupants if failure occurs.
    Special condition nos. 3, 7, and 8 are self-explanatory.
    Special condition no. 4 makes it clear that the flammable-fluid
fire protection requirements of Sec.  25.863 apply to non-rechargeable
lithium battery installations. Section 25.863 is applicable to areas of
the airplane that could be exposed to flammable fluid leakage from
airplane systems. Non-rechargeable lithium batteries contain an
electrolyte that is a flammable fluid.
    Special condition no. 5 requires that each non-rechargeable lithium
battery installation not damage surrounding structure or adjacent
systems, equipment, or electrical wiring from corrosive fluids or gases
that may escape in such a way as to cause a major or more-severe
failure condition.
    While special condition no. 5 addresses corrosive fluids and gases,
special condition no. 6 addresses heat. Special condition no. 6
requires that each non-rechargeable lithium battery installation have
provisions to prevent any hazardous effect on airplane structure or
systems caused by the maximum amount of heat the battery installation
can generate, due to any failure of it or its individual cells. The
means of meeting special condition nos. 5 and 6 may be the same, but
the requirements are independent and address different hazards.
    These special conditions apply to all non-rechargeable lithium
battery installations in lieu of Sec.  25.1353(b)(1) through (4) at
Amendment 25-123, or Sec.  [thinsp]25.1353(c)(1) through (4) at earlier
amendments. Those regulations remain in effect for other battery
installations.
    These special conditions contain the additional safety standards
that the Administrator considers necessary to establish a level of
safety equivalent to that established by the existing airworthiness
standards.

Applicability

    As discussed above, these special conditions are applicable to the
Airbus Model C-295 airplane. Should Airbus apply at a later date for a
change to the type certificate to include another model incorporating
the same novel or unusual design feature, these special conditions
would apply to that model as well.
    These special conditions are not applicable to changes to
previously certified non-rechargeable lithium battery installations
where the only change is either cosmetic or to relocate the
installation to improve the safety of the airplane and occupants.
Previously certified non-rechargeable lithium battery installations, as
used in this paragraph, are those installations approved for
certification projects applied for on or before the effective date of
these special conditions. A cosmetic change is a change in appearance
only, and does not change any function or safety characteristic of the
battery installation. These special conditions are also not applicable
to unchanged, previously certified non-rechargeable lithium battery
installations that are affected by a change in a manner that improves
the safety of its installation. The FAA determined that these
exclusions are in the public interest because the need to meet all of
the special conditions might otherwise deter these design changes that
improve safety.

Conclusion

    This action affects only certain novel or unusual design features
on one model of airplane. It is not a rule of general applicability.

List of Subjects in 14 CFR Part 25

    Aircraft, Aviation safety, Reporting and recordkeeping
requirements.

Authority Citation

    The authority citation for these special conditions is as follows:

    Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702, 44704.

The Special Conditions

0
Accordingly, pursuant to the authority delegated to me by the
Administrator, the following special conditions are issued as part of
the type certification basis for Airbus Defense and Space Model C-295
airplanes.

Non-Rechargeable Lithium Battery Installations

    In lieu of Sec.  [thinsp]25.1353(b)(1) through (4) at Amendment 25-
123, or Sec.  [thinsp]25.1353(c)(1) through (4) at earlier amendments,
each non-rechargeable lithium battery installation must:
    1. Be designed to maintain safe cell temperatures and pressures
under all foreseeable operating conditions to prevent fire and
explosion.
    2. Be designed to prevent the occurrence of self-sustaining,
uncontrollable increases in temperature or pressure.
    3. Not emit explosive or toxic gases, either in normal operation or
as a result of its failure that may accumulate in hazardous quantities
within the airplane.
    4. Meet the requirements of Sec.  25.863.
    5. Not damage surrounding structure or adjacent systems, equipment,
or electrical wiring from corrosive fluids or gases that may escape in
such a way as to cause a major or more-severe failure condition.
    6. Have provisions to prevent any hazardous effect on airplane
structure or systems caused by the maximum amount of heat it can
generate due to any failure of it or its individual cells.
    7. Have a failure-sensing and warning system to alert the
flightcrew if its failure affects safe operation of the airplane.
    8. Have a means for the flightcrew or maintenance personnel to
determine the battery charge state if the battery's function is
required for safe operation of the airplane.

    Note: A battery system consists of the battery and any
protective, monitoring, and alerting circuitry or hardware inside or
outside of the battery. It also includes vents (where necessary) and
packaging. For the purpose of these special conditions, a
``battery'' and ``battery system'' are referred to as a battery.

    Issued in Des Moines, Washington, on December 20, 2019.
Mary A. Schooley,
Acting Manager, Transport Standards Branch, Policy and Innovation
Division, Aircraft Certification Service.
[FR Doc. 2019-28013 Filed 1-6-20; 8:45 am]
 BILLING CODE 4910-13-P


D 1 APPENDIX D NATIONAL ELECTRIC GENERATION CAPACITY AND GENERATION FOR IPM CASES This appendix contains the selected results of the IPM runs performed for this study. It provides IPM's selection of the types of electric generation capacity for years 2005, 2007, and 2010 to meet national electric demand and the amount of electric generation each type of generation unit provided. Each exhibit of results has the name used for the IPM run in this study.

There are electric generation units without pollution controls and those units that add them ( retrofit) or repower over time. EPA set up IPM to allow generation units to retrofit twice during the simulation ( repowering is included in this activity). The exhibits show where single and multiple retrofits occur over time.

Key abbreviations in the exhibits include:

CC combined cycle IGCC integrated gasification combined cycle ( burning of gasified coal) SCR selective catalytic reduction ( NOx control technology) SNCR selective noncatalytic reduction ( NOx control technology) SRB scrubber HG mercury control ( as explained in Appendix C) D 2 Exhibit D 1 National Electric Generation Capacity and Generation Base Case Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 54,781 54,781 54,707 388,984 389,272 389,818 Unscrubbed Coal 55,993 55,629 51,779 384,436 383,425 364,504 Oil/ Gas Steam 103,979 103,283 76,153 240,092 250,792 82,938 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 44,869 49,566 83,827 231,837 275,776 417,007 IGCC 612 612 612 4,558 4,558 4,558 Turbine 80,861 87,210 89,471 63,319 73,183 55,106 Renewables 7,737 7,737 7,739 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,470 7,286 8,302 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 17,154 0 0 128,353 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 0 0 2,092 0 0 15,580 Retrofit Coal SCR 72,238 72,238 72,003 520,904 522,464 524,843 Retrofit Coal SNCR 116,886 116,764 118,051 753,237 759,079 781,027 Retrofit SCR and Scrubber 727 727 727 5,418 5,418 5,418 Retrofit SNCR and Scrubber 3,301 3,301 3,301 23,482 23,802 23,789 Retrofit Coal Gas Reburn 508 508 508 2,724 2,724 2,842 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 1,535 1,780 16 5,184 5,976 23 Retrofit Oil/ Gas SNCR 8,505 8,505 4,356 20,533 19,912 3,820 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 0 0 0 0 Repower Oil/ Gas SCR to CC 0 0 2,269 0 0 17,317 Repower Oil/ Gas SNCR to CC 0 0 8,299 0 0 54,773 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 0 0 230 0 0 1,717 Retrofit SNCR with Scrubber 1 1 1 10 10 10 Repower Gas Reburn to CC 0 0 0 0 0 0 Retrofit Gas Reburn with Scrubber 1 1 1 8 8 8 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 769,524 778,541 804,938 3,634,092 3,712,654 3,830,848 D 3 Exhibit D 2 National Electric Generation Capacity and Generation Base Case with 40 Percent Reduction in SO2 in 2010 Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 54,979 54,785 54,711 390,780 389,719 382,854 Unscrubbed Coal 46,189 45,825 43,760 313,923 312,970 298,167 Oil/ Gas Steam 107,896 107,205 75,990 250,438 261,457 80,638 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 47,089 51,694 87,669 247,150 291,485 463,292 IGCC 612 612 612 4,558 4,558 4,558 Turbine 79,505 85,969 88,296 63,294 72,808 56,436 Renewables 7,737 7,737 7,739 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,372 7,286 8,267 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 17,181 0 0 128,680 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 10,492 10,492 11,283 78,149 78,149 84,040 Retrofit Coal SCR 48,539 46,947 38,254 339,104 330,014 267,008 Retrofit Coal SNCR 110,564 109,542 94,465 696,147 694,613 590,863 Retrofit SCR and Scrubber 740 740 740 5,514 5,514 5,514 Retrofit SNCR and Scrubber 3,303 3,303 3,303 24,589 24,604 24,604 Retrofit Coal Gas Reburn 510 510 380 2,616 2,616 2,038 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 412 412 16 1,341 1,259 23 Retrofit Oil/ Gas SNCR 5,711 5,952 3,184 15,819 16,412 3,185 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 0 0 0 0 Repower Oil/ Gas SCR to CC 0 0 5,176 0 0 39,495 Repower Oil/ Gas SNCR to CC 0 0 5,536 0 0 32,414 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 23,125 24,684 33,194 172,246 183,852 247,242 Retrofit SNCR with Scrubber 5,159 6,231 21,551 38,428 45,944 160,516 Repower Gas Reburn to CC 0 0 256 0 0 1,128 Retrofit Gas Reburn with Scrubber 4 4 6 30 30 44 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 769,557 778,541 804,944 3,633,394 3,712,259 3,830,101 D 4 Exhibit D 3 National Electric Generation Capacity and Generation Base Case with 45 Percent Reduction in SO2 in 2010 Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 54,791 54,791 54,717 389,240 388,880 378,062 Unscrubbed Coal 45,475 44,678 43,877 307,339 303,779 293,613 Oil/ Gas Steam 108,418 107,701 75,091 252,710 263,090 79,513 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 47,166 52,024 88,791 249,909 295,634 479,874 IGCC 612 612 612 4,558 4,558 4,558 Turbine 79,620 85,923 88,093 64,077 72,985 56,659 Renewables 7,737 7,737 7,739 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,460 7,286 8,231 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 18,059 0 0 134,426 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 10,858 11,282 11,540 80,875 84,033 85,951 Retrofit Coal SCR 45,420 42,398 38,245 315,062 297,937 264,478 Retrofit Coal SNCR 105,664 101,696 89,048 658,128 632,522 547,273 Retrofit SCR and Scrubber 738 738 738 5,499 5,499 5,499 Retrofit SNCR and Scrubber 3,305 3,305 3,305 24,619 24,619 24,619 Retrofit Coal Gas Reburn 508 508 379 2,561 2,603 2,033 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 325 325 16 1,154 1,167 23 Retrofit Oil/ Gas SNCR 5,276 5,543 3,184 15,188 15,792 3,343 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 2 0 0 9 Repower Oil/ Gas SCR to CC 0 0 5,203 0 0 39,705 Repower Oil/ Gas SNCR to CC 0 0 4,718 0 0 27,189 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 26,169 29,128 33,193 194,915 216,952 247,234 Retrofit SNCR with Scrubber 10,484 14,250 26,487 78,092 105,932 197,282 Repower Gas Reburn to CC 0 0 256 0 0 1,128 Retrofit Gas Reburn with Scrubber 5 5 6 37 37 44 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 769,562 778,541 804,943 3,633,321 3,712,273 3,829,837 D 5 Exhibit D 4 National Electric Generation Capacity and Generation Base Case with 50 Percent Reduction in SO2 in 2010 Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 54,793 54,793 54,719 388,265 389,478 373,018 Unscrubbed Coal 44,967 44,601 40,127 303,123 303,320 270,127 Oil/ Gas Steam 108,424 107,955 75,040 249,040 264,453 80,809 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 48,005 52,235 89,916 257,234 298,409 491,277 IGCC 612 612 612 4,558 4,558 4,558 Turbine 79,692 85,913 88,102 63,908 73,372 56,549 Renewables 7,737 7,737 7,739 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,460 7,286 8,095 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 18,081 0 0 135,088 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 11,282 11,283 14,301 84,033 84,040 106,521 Retrofit Coal SCR 42,206 39,967 36,475 294,990 278,558 253,012 Retrofit Coal SNCR 100,085 94,635 86,660 612,347 578,140 523,397 Retrofit SCR and Scrubber 736 736 736 5,484 5,484 5,484 Retrofit SNCR and Scrubber 3,307 3,307 3,307 24,634 24,634 24,634 Retrofit Coal Gas Reburn 510 510 379 2,374 2,376 2,033 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 319 319 16 1,135 1,147 23 Retrofit Oil/ Gas SNCR 5,276 5,294 3,184 15,198 15,312 3,402 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 2 0 0 9 Repower Oil/ Gas SCR to CC 0 0 5,206 0 0 39,723 Repower Oil/ Gas SNCR to CC 0 0 4,703 0 0 26,784 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 29,312 31,504 34,922 218,322 234,648 260,112 Retrofit SNCR with Scrubber 16,020 21,237 28,810 119,318 157,970 214,587 Repower Gas Reburn to CC 0 0 256 0 0 1,128 Retrofit Gas Reburn with Scrubber 5 5 8 37 37 59 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 770,278 778,541 804,943 3,633,356 3,712,192 3,829,522 D 6 Exhibit D 5 National Electric Generation Capacity and Generation Base Case with 55 Percent Reduction in SO2 in 2010 Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 54,796 54,796 54,722 388,254 388,294 371,163 Unscrubbed Coal 44,976 44,611 39,483 301,247 301,016 263,292 Oil/ Gas Steam 108,419 107,969 74,516 248,355 265,417 78,712 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 48,686 52,897 91,216 262,999 303,328 501,131 IGCC 612 612 612 4,558 4,558 4,558 Turbine 79,170 85,308 87,539 63,654 73,009 56,637 Renewables 7,737 7,737 7,740 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,450 7,286 7,958 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 18,217 0 0 136,384 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 11,283 11,283 14,941 84,040 84,040 111,282 Retrofit Coal SCR 39,965 39,324 35,023 277,418 273,200 243,426 Retrofit Coal SNCR 95,742 92,589 77,398 580,012 561,862 451,179 Retrofit SCR and Scrubber 735 735 735 5,477 5,477 5,477 Retrofit SNCR and Scrubber 3,308 3,308 3,308 23,995 24,422 24,641 Retrofit Coal Gas Reburn 510 510 379 2,374 2,376 2,033 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 324 324 16 1,149 1,162 23 Retrofit Oil/ Gas SNCR 5,276 5,276 3,184 15,198 15,269 3,635 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 2 0 0 9 Repower Oil/ Gas SCR to CC 0 0 5,145 0 0 39,263 Repower Oil/ Gas SNCR to CC 0 0 4,666 0 0 26,339 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 31,504 32,131 36,342 234,648 239,322 270,685 Retrofit SNCR with Scrubber 20,261 23,228 37,868 150,560 173,007 281,235 Repower Gas Reburn to CC 0 0 256 0 0 1,128 Retrofit Gas Reburn with Scrubber 5 5 8 37 37 59 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 770,299 778,541 804,957 3,633,321 3,712,051 3,829,343 D 7 Exhibit D 6 National Electric Generation Capacity and Generation Carbon Level of 567 MMT in 2008 Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 55,023 55,023 51,769 389,573 389,921 326,839 Unscrubbed Coal 56,985 56,621 56,152 389,900 387,953 276,378 Oil/ Gas Steam 105,631 104,615 52,088 240,247 245,410 28,404 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 48,443 55,992 119,132 242,767 296,380 733,557 IGCC 612 612 612 4,558 4,558 4,558 Turbine 77,266 80,783 82,907 60,209 66,506 48,767 Renewables 7,737 7,737 7,742 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,470 7,286 7,570 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 18,818 0 0 141,401 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 3 3 3 18 18 20 Retrofit Coal SCR 72,139 72,139 71,480 518,336 521,199 496,108 Retrofit Coal SNCR 115,753 115,631 115,161 745,694 748,600 707,674 Retrofit SCR and Scrubber 726 726 726 5,407 5,407 5,407 Retrofit SNCR and Scrubber 3,300 3,300 3,300 23,472 23,563 23,472 Retrofit Coal Gas Reburn 507 507 507 2,809 2,809 2,719 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 963 1,529 16 2,681 5,135 23 Retrofit Oil/ Gas SNCR 7,424 7,424 3,182 19,195 19,088 2,107 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 0 0 0 0 Repower Oil/ Gas SCR to CC 0 0 1,939 0 0 14,798 Repower Oil/ Gas SNCR to CC 0 0 8,485 0 0 57,879 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 0 0 0 0 0 0 Retrofit SNCR with Scrubber 0 0 0 0 0 0 Repower Gas Reburn to CC 0 0 0 0 0 0 Retrofit Gas Reburn with Scrubber 1 1 1 8 8 8 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 769,503 778,541 805,663 3,634,240 3,712,811 3,826,787 D 8 Exhibit D 7 National Electric Generation Capacity and Generation High Efficiency   Carbon Level of 515 MMT in 2008 Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 54,989 54,949 49,513 387,097 386,696 279,161 Unscrubbed Coal 56,533 56,209 50,130 388,371 386,819 236,040 Oil/ Gas Steam 107,763 106,881 41,854 257,163 253,306 20,409 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 39,236 42,059 112,441 184,715 196,141 693,863 IGCC 612 612 612 4,558 4,558 4,558 Turbine 75,249 73,897 71,464 55,685 58,832 45,929 Renewables 7,737 7,737 7,745 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,462 7,304 6,902 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 322 0 0 2,457 Repower Oil/ Gas to CC 0 0 16,535 0 0 124,101 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 3 3 3 18 18 20 Retrofit Coal SCR 71,155 71,103 68,600 507,302 508,011 477,031 Retrofit Coal SNCR 116,015 115,893 112,521 742,820 736,759 660,314 Retrofit SCR and Scrubber 726 726 0 5,407 5,407 0 Retrofit SNCR and Scrubber 3,300 3,300 3,300 23,472 23,472 21,982 Retrofit Coal Gas Reburn 507 507 507 2,809 2,809 2,719 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 823 538 16 2,418 1,440 23 Retrofit Oil/ Gas SNCR 4,350 4,350 3,410 10,545 12,328 1,890 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 288 0 0 2,198 Repower Oil/ Gas SCR to CC 0 0 5,458 0 0 41,648 Repower Oil/ Gas SNCR to CC 0 0 2,362 0 0 14,850 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 0 0 0 0 0 0 Retrofit SNCR with Scrubber 0 0 0 0 0 0 Repower Gas Reburn to CC 0 0 0 0 0 0 Retrofit Gas Reburn with Scrubber 1 1 1 7 8 6 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 755,988 754,662 758,723 3,561,749 3,572,877 3,585,196 D 9 Exhibit D 8 National Electric Generation Capacity and Generation Base Case with 50 Percent Reduction in SO2 and Carbon Level of 567 MMT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 55,023 55,023 52,874 391,504 390,919 346,246 Unscrubbed Coal 48,013 47,647 45,720 320,005 318,539 223,865 Oil/ Gas Steam 108,836 108,386 57,860 249,408 257,317 43,035 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 49,975 57,810 118,141 261,003 317,060 735,583 IGCC 612 612 612 4,558 4,558 4,558 Turbine 76,752 79,859 81,880 60,402 66,740 51,085 Renewables 7,737 7,737 7,742 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,383 7,198 7,875 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 19,353 0 0 144,241 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 8,853 8,853 8,363 65,927 65,927 62,291 Retrofit Coal SCR 46,855 46,855 40,078 326,950 324,723 263,716 Retrofit Coal SNCR 108,862 107,295 91,700 682,229 677,905 506,340 Retrofit SCR and Scrubber 726 726 726 5,407 5,407 5,407 Retrofit SNCR and Scrubber 3,300 3,300 3,300 24,579 24,579 24,579 Retrofit Coal Gas Reburn 507 508 0 2,597 2,602 0 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 227 227 16 821 779 23 Retrofit Oil/ Gas SNCR 4,956 4,956 3,181 14,628 14,441 2,343 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 286 0 0 2,182 Repower Oil/ Gas SCR to CC 0 0 5,288 0 0 40,354 Repower Oil/ Gas SNCR to CC 0 0 4,348 0 0 28,289 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 24,753 24,753 30,743 184,370 184,370 228,984 Retrofit SNCR with Scrubber 6,679 8,094 20,267 49,745 60,287 150,954 Repower Gas Reburn to CC 0 0 1,016 0 0 6,516 Retrofit Gas Reburn with Scrubber 3 3 3 23 23 23 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 769,658 778,541 805,136 3,633,434 3,712,343 3,827,584 D 10 Exhibit D 9 National Electric Generation Capacity and Generation Base Case with 50 Percent Reduction in SO2 and High Efficiency Carbon Level of 515 MMT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2005 2007 2010 2005 2007 2010 Scrubbed Coal 54,989 54,949 51,676 391,437 391,139 333,038 Unscrubbed Coal 50,307 49,957 44,409 335,004 333,819 194,229 Oil/ Gas Steam 108,587 107,761 46,326 258,397 255,266 27,224 Nuclear 86,763 85,670 81,415 609,157 613,083 580,196 Hydro 93,830 93,830 93,830 276,883 276,883 276,883 Comb. Cycle Gas 40,600 43,943 112,969 196,993 213,677 702,241 IGCC 612 612 612 4,558 4,558 4,558 Turbine 74,144 72,295 71,049 56,305 58,517 48,396 Renewables 7,737 7,737 7,745 60,999 60,999 60,999 Pump Storage 23,046 23,046 23,046 7,387 7,357 6,758 Imports 13,350 13,350 13,350 34,858 38,004 31,017 Repower Coal to CC 0 0 0 0 0 0 Repower Oil/ Gas to CC 0 0 17,402 0 0 128,474 Repower Coal to IGCC 0 0 0 0 0 0 Retrofit Scrubber 6,245 6,249 3,593 46,513 46,540 26,762 Retrofit Coal SCR 47,731 46,402 38,561 339,509 329,327 257,787 Retrofit Coal SNCR 110,733 110,611 99,690 692,366 685,613 533,677 Retrofit SCR and Scrubber 726 726 726 5,407 5,407 5,407 Retrofit SNCR and Scrubber 3,300 3,300 3,300 24,579 24,579 24,574 Retrofit Coal Gas Reburn 509 509 0 2,607 2,607 0 Retrofit Coal Seasonal Gas 0 0 0 0 0 0 Retrofit Oil/ Gas SCR 507 166 16 2,187 577 23 Retrofit Oil/ Gas SNCR 3,841 3,841 3,181 12,238 12,061 2,069 Repower Coal SCR to CC 0 0 0 0 0 0 Repower Coal SNCR to CC 0 0 288 0 0 2,198 Repower Oil/ Gas SCR to CC 0 0 5,419 0 0 41,349 Repower Oil/ Gas SNCR to CC 0 0 2,007 0 0 13,656 Repower SCR to IGCC 0 0 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 0 0 Retrofit SCR with Scrubber 22,466 23,690 29,231 167,337 176,453 217,720 Retrofit SNCR with Scrubber 4,879 4,879 7,993 36,343 36,343 59,533 Repower Gas Reburn to CC 0 0 1,018 0 0 6,530 Retrofit Gas Reburn with Scrubber 2 2 2 15 15 15 Repower Gas Reburn to IGCC 0 0 0 0 0 0 Repower SCR and Scrubber to CC 0 0 0 0 0 0 Repower SNCR and Scrubber to CC 0 0 0 0 0 0 Repower Coal SCR and Scrubber to IGCC 0 0 0 0 0 0 Repower SNCR and Scrubber to IGCC 0 0 0 0 0 0 Repower Scrubber to CC 0 0 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 0 0 Total 754,905 753,526 758,854 3,561,080 3,572,825 3,585,312 D 11 Exhibit D 10 National Electric Generation Capacity and Generation Base Case With Mercury MACT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh) Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Scrubbed Coal 536 536 3,951 3,961 Unscrubbed Coal 799 635 4,616 3,933 Oil/ Gas Steam 105,223 76,640 255,746 82,462 Nuclear 85,670 81,415 613,083 580,196 Hydro 93,830 93,830 276,883 276,883 Comb. Cycle Gas 50,359 83,731 281,153 425,853 IGCC 0 0 0 0 Turbine 86,440 88,757 71,822 55,308 Renewables 7,737 7,739 60,999 60,999 Pump Storage 23,046 23,046 7,286 9,238 Imports 13,350 13,350 38,004 31,017 Repower Coal to CC 0 0 0 0 Repower Oil/ Gas to CC 0 18,201 0 136,509 Repower Coal to IGCC 0 0 0 0 Retrofit Scrubber 0 0 0 0 Retrofit SCR 0 0 0 0 Retrofit SNCR 0 0 0 0 Retrofit SCR and Scrubber 0 0 0 0 Retrofit SNCR and Scrubber 0 0 0 0 Retrofit Gas Reburn 0 0 0 0 Retrofit Seasonal Gas 0 0 0 0 Retrofit Oil/ Gas SCR 1,620 16 5,640 23 Retrofit Oil/ Gas SNCR 6,726 4,597 16,659 4,130 Repower SCR to CC 0 0 0 0 Repower SNCR to CC 0 0 0 0 Repower Oil/ Gas SCR to CC 0 6,046 0 46,141 Repower Oil/ Gas SNCR to CC 0 4,257 0 23,703 Repower SCR to IGCC 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 Retrofit SCR to Scrubber 0 0 0 0 Retrofit SNCR to Scrubber 0 0 0 0 Repower Gas Reburn to CC 0 0 0 0 Retrofit Gas Reburn to Scrubber 0 0 0 0 Repower Gas Reburn to IGCC 0 0 0 0 Repower SCR and SRB to CC 0 0 0 0 Repower SNCR and SRB to CC 0 0 0 0 Repower SCR and SRB to IGCC 0 0 0 0 D 12 Exhibit D 10 ( continued) National Electric Generation Capacity and Generation Base Case With Mercury MACT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh) Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Repower SNCR and SRB to IGCC 0 0 0 0 Repower Scrubber to CC 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 Retrofit HG 110,494 109,320 771,678 764,965 Retrofit SCR to HG 0 0 0 0 Retrofit SNCR to HG 0 0 0 0 Retrofit Gas Reburn to HG 0 0 0 0 Retrofit SCR and SRB to HG 0 0 0 0 Retrofit SNCR and SRB to HG 0 0 0 0 Retrofit SRB to HG 0 0 0 0 Repower HG to CC 0 0 0 0 Repower HG to IGCC 0 0 0 0 Retrofit HG to Scrubber 0 0 0 0 Retrofit HG and SCR 70,954 68,385 512,972 496,185 Retrofit HG and SNCR 115,561 114,849 748,708 757,961 Retrofit HG and SCR and SRB 727 727 5,418 5,418 Retrofit HG and SNCR and SRB 3,301 3,301 23,833 24,590 Retrofit HG and Gas Reburn 507 507 2,719 2,719 Repower HG and SCR to CC 0 0 0 0 Repower HG and SCR to IGCC 0 0 0 0 Retrofit HG and SCR to SRB 1,162 3,677 8,654 27,385 Repower HG and SNCR to CC 0 0 0 0 Repower HG and SNCR to IGCC 0 0 0 0 Retrofit HG and SNCR to SRB 1 617 7 4,595 Repower HG and SCR and SRB to CC 0 0 0 0 Repower HG and SCR and SRB to IGCC 0 0 0 0 Repower HG and SNCR and SRB to CC 0 0 0 0 Repower HG and SNCR and SRB to IGCC 0 0 0 0 Repower HG and Gas Reburn to CC 0 0 0 0 Repower HG and Gas Reburn to IGCC 0 0 0 0 Retrofit HG and Gas Reburn to SRB 0 0 0 0 Retrofit HG to SCR 71 71 497 523 Retrofit HG to SNCR 425 1,345 2,116 7,043 Retrofit HG to SCR and SRB 0 0 0 0 Retrofit HG to SNCR and SRB 0 0 0 0 Retrofit HG to Gas Reburn 1 1 5 6 Total 778,541 805,597 3,712,447 3,831,742 D 13 Exhibit D 11 National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 With Mercury MACT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Scrubbed Coal 547 547 4,029 4,057 Unscrubbed Coal 807 633 4,915 4,068 Oil/ Gas Steam 109,330 74,252 267,922 76,076 Nuclear 85,670 81,415 613,083 580,196 Hydro 93,830 93,830 276,883 276,883 Comb. Cycle Gas 53,077 91,374 308,657 509,657 IGCC 0 0 0 0 Turbine 85,272 87,657 72,453 56,528 Renewables 7,737 7,740 60,999 60,999 Pump Storage 23,046 23,046 7,286 9,046 Imports 13,350 13,350 38,004 31,017 Repower Coal to CC 0 0 0 0 Repower Oil/ Gas to CC 0 21,659 0 155,744 Repower Coal to IGCC 0 0 0 0 Retrofit Scrubber 0 0 0 0 Retrofit SCR 0 0 0 0 Retrofit SNCR 0 0 0 0 Retrofit SCR and Scrubber 0 0 0 0 Retrofit SNCR and Scrubber 0 0 0 0 Retrofit Gas Reburn 0 0 0 0 Retrofit Seasonal Gas 0 0 0 0 Retrofit Oil/ Gas SCR 342 16 1,222 23 Retrofit Oil/ Gas SNCR 3,898 3,183 12,896 3,467 Repower SCR to CC 0 0 0 0 Repower SNCR to CC 0 0 0 0 Repower Oil/ Gas SCR to CC 0 5,200 0 39,681 Repower Oil/ Gas SNCR to CC 0 1,912 0 12,979 Repower SCR to IGCC 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 Retrofit SCR to Scrubber 0 0 0 0 Retrofit SNCR to Scrubber 0 0 0 0 Repower Gas Reburn to CC 0 0 0 0 Retrofit Gas Reburn to Scrubber 0 0 0 0 Repower Gas Reburn to IGCC 0 0 0 0 Repower SCR and SRB to CC 0 0 0 0 Repower SNCR and SRB to CC 0 0 0 0 Repower SCR and SRB to IGCC 0 0 0 0 D 14 Exhibit D 11 ( continued) National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 With Mercury MACT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Repower SNCR and SRB to IGCC 0 0 0 0 Repower Scrubber to CC 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 Retrofit HG 98,948 95,089 683,795 635,972 Retrofit SCR to HG 0 0 0 0 Retrofit SNCR to HG 0 0 0 0 Retrofit Gas Reburn to HG 0 0 0 0 Retrofit SCR and SRB to HG 0 0 0 0 Retrofit SNCR and SRB to HG 0 0 0 0 Retrofit SRB to HG 0 0 0 0 Repower HG to CC 0 0 0 0 Repower HG to IGCC 0 0 0 0 Retrofit HG to Scrubber 11,287 13,795 84,068 102,751 Retrofit HG and SCR 42,742 36,060 299,363 250,511 Retrofit HG and SNCR 100,576 86,312 621,038 513,241 Retrofit HG and SCR and SRB 732 732 5,455 5,455 Retrofit HG and SNCR and SRB 3,300 3,300 24,579 24,579 Retrofit HG and Gas Reburn 507 379 2,033 2,033 Repower HG and SCR to CC 0 0 0 0 Repower HG and SCR to IGCC 0 0 0 0 Retrofit HG and SCR to SRB 28,380 34,921 211,380 260,104 Repower HG and SNCR to CC 0 0 0 0 Repower HG and SNCR to IGCC 0 0 0 0 Retrofit HG and SNCR to SRB 14,683 28,386 109,361 211,424 Repower HG and SCR and SRB to CC 0 0 0 0 Repower HG and SCR and SRB to IGCC 0 0 0 0 Repower HG and SNCR and SRB to CC 0 0 0 0 Repower HG and SNCR and SRB to IGCC 0 0 0 0 Repower HG and Gas Reburn to CC 0 258 0 1,136 Repower HG and Gas Reburn to IGCC 0 0 0 0 Retrofit HG and Gas Reburn to SRB 2 3 15 22 Retrofit HG to SCR 0 0 0 0 Retrofit HG to SNCR 480 513 2,574 2,751 Retrofit HG to SCR and SRB 0 0 0 0 Retrofit HG to SNCR and SRB 0 0 0 0 Retrofit HG to Gas Reburn 0 0 0 0 Total 778,541 805,563 3,712,009 3,830,400 D 15 Exhibit D 12 National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 / High Efficiency   Carbon Level of 515 MMT in 2008 With Mercury MACT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Scrubbed Coal 547 547 4,056 4,067 Unscrubbed Coal 805 650 5,158 4,146 Oil/ Gas Steam 107,958 47,057 258,135 27,781 Nuclear 85,670 81,415 613,083 580,196 Hydro 93,830 93,830 276,883 276,883 Comb. Cycle Gas 43,575 111,134 218,962 689,408 IGCC 0 0 0 0 Turbine 72,608 71,439 58,262 49,076 Renewables 7,737 7,745 60,999 60,999 Pump Storage 23,046 23,046 7,336 6,879 Imports 13,350 13,350 38,004 31,017 Repower Coal to CC 0 0 0 0 Repower Oil/ Gas to CC 0 18,687 0 138,350 Repower Coal to IGCC 0 0 0 0 Retrofit Scrubber 0 0 0 0 Retrofit SCR 0 0 0 0 Retrofit SNCR 0 0 0 0 Retrofit SCR and Scrubber 0 0 0 0 Retrofit SNCR and Scrubber 0 0 0 0 Retrofit Gas Reburn 0 0 0 0 Retrofit Seasonal Gas 0 0 0 0 Retrofit Oil/ Gas SCR 16 16 89 23 Retrofit Oil/ Gas SNCR 3,794 3,181 12,249 2,124 Repower SCR to CC 0 0 0 0 Repower SNCR to CC 0 0 0 0 Repower Oil/ Gas SCR to CC 0 5,419 0 41,349 Repower Oil/ Gas SNCR to CC 0 2,353 0 16,298 Repower SCR to IGCC 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 Retrofit SCR to Scrubber 0 0 0 0 Retrofit SNCR to Scrubber 0 0 0 0 Repower Gas Reburn to CC 0 0 0 0 Retrofit Gas Reburn to Scrubber 0 0 0 0 Repower Gas Reburn to IGCC 0 0 0 0 Repower SCR and SRB to CC 0 0 0 0 Repower SNCR and SRB to CC 0 0 0 0 Repower SCR and SRB to IGCC 0 0 0 0 D 16 Exhibit D 12 ( continued) National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 / High Efficiency   Carbon Level of 515 MMT in 2008 With Mercury MACT Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Repower SNCR and SRB to IGCC 0 0 0 0 Repower Scrubber to CC 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 Retrofit HG 107,615 94,959 739,432 522,354 Retrofit SCR to HG 0 0 0 0 Retrofit SNCR to HG 0 0 0 0 Retrofit Gas Reburn to HG 0 0 0 0 Retrofit SCR and SRB to HG 0 0 0 0 Retrofit SNCR and SRB to HG 0 0 0 0 Retrofit SRB to HG 0 0 0 0 Repower HG to CC 0 0 0 0 Repower HG to IGCC 0 0 0 0 Retrofit HG to Scrubber 3,136 3,571 23,358 26,599 Retrofit HG and SCR 46,249 38,105 328,255 254,767 Retrofit HG and SNCR 110,250 97,821 681,905 524,323 Retrofit HG and SCR and SRB 726 726 5,407 5,407 Retrofit HG and SNCR and SRB 3,300 3,300 24,579 24,310 Retrofit HG and Gas Reburn 507 0 2,033 0 Repower HG and SCR to CC 0 0 0 0 Repower HG and SCR to IGCC 0 0 0 0 Retrofit HG and SCR to SRB 23,871 29,776 177,802 221,777 Repower HG and SNCR to CC 0 286 0 2,182 Repower HG and SNCR to IGCC 0 0 0 0 Retrofit HG and SNCR to SRB 4,879 9,173 36,343 68,324 Repower HG and SCR and SRB to CC 0 0 0 0 Repower HG and SCR and SRB to IGCC 0 0 0 0 Repower HG and SNCR and SRB to CC 0 0 0 0 Repower HG and SNCR and SRB to IGCC 0 0 0 0 Repower HG and Gas Reburn to CC 0 1,016 0 6,516 Repower HG and Gas Reburn to IGCC 0 0 0 0 Retrofit HG and Gas Reburn to SRB 0 0 0 0 Retrofit HG to SCR 0 0 0 0 Retrofit HG to SNCR 0 0 0 0 Retrofit HG to SCR and SRB 0 0 0 0 Retrofit HG to SNCR and SRB 0 0 0 0 Retrofit HG to Gas Reburn 0 0 0 0 Total 753,471 758,601 3,572,330 3,585,155 D 17 Exhibit D 13 National Electric Generation Capacity and Generation Base Case With Mercury Cap and Trade Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Scrubbed Coal 10,425 9,382 60,438 52,652 Unscrubbed Coal 9,569 9,005 58,709 58,123 Oil/ Gas Steam 107,130 76,517 261,290 80,381 Nuclear 85,670 81,415 613,083 580,196 Hydro 93,830 93,830 276,883 276,883 Comb. Cycle Gas 50,756 85,752 286,652 461,269 IGCC 612 612 4,558 4,558 Turbine 86,103 88,360 71,376 54,997 Renewables 7,737 7,739 60,999 60,999 Pump Storage 23,046 23,046 7,243 8,132 Imports 13,350 13,350 38,004 31,017 Repower Coal to CC 0 0 0 0 Repower Oil/ Gas to CC 0 17,141 0 128,375 Repower Coal to IGCC 0 0 0 0 Retrofit Scrubber 0 0 0 0 Retrofit SCR 3,315 2,921 23,884 20,977 Retrofit SNCR 9,753 9,890 59,604 62,280 Retrofit SCR and Scrubber 0 0 0 0 Retrofit SNCR and Scrubber 0 0 0 0 Retrofit Gas Reburn 0 0 0 0 Retrofit Seasonal Gas 0 0 0 0 Retrofit Oil/ Gas SCR 487 16 1,435 23 Retrofit Oil/ Gas SNCR 5,952 3,184 15,876 2,599 Repower SCR to CC 0 0 0 0 Repower SNCR to CC 0 0 0 0 Repower Oil/ Gas SCR to CC 0 5,069 0 38,684 Repower Oil/ Gas SNCR to CC 0 5,536 0 33,088 Repower SCR to IGCC 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 Retrofit SCR to Scrubber 0 0 0 0 Retrofit SNCR to Scrubber 0 0 0 0 Repower Gas Reburn to CC 0 0 0 0 Retrofit Gas Reburn to Scrubber 0 0 0 0 Repower Gas Reburn to IGCC 0 0 0 0 Repower SCR and SRB to CC 0 0 0 0 Repower SNCR and SRB to CC 0 0 0 0 Repower SCR and SRB to IGCC 0 0 0 0 Repower SNCR and SRB to IGCC 0 0 0 0 Repower Scrubber to CC 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 Retrofit HG 90,745 91,714 651,073 641,541 D 18 Exhibit D 13 ( continued) National Electric Generation Capacity and Generation Base Case With Mercury Cap and Trade Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Retrofit SCR to HG 65,144 65,539 474,947 476,680 Retrofit SNCR to HG 106,335 106,335 683,966 693,676 Retrofit Gas Reburn to HG 548 548 3,077 3,077 Retrofit SCR and SRB to HG 726 726 5,408 5,408 Retrofit SNCR and SRB to HG 3,301 3,301 24,172 24,590 Retrofit SRB to HG 361 361 2,692 2,692 Repower HG to CC 0 0 0 0 Repower HG to IGCC 0 0 0 0 Retrofit HG to Scrubber 0 0 0 0 Retrofit HG and SCR 0 0 0 0 Retrofit HG and SNCR 0 0 0 0 Retrofit HG and SCR and SRB 0 0 0 0 Retrofit HG and SNCR and SRB 0 0 0 0 Retrofit HG and Gas Reburn 0 0 0 0 Repower HG and SCR to CC 0 0 0 0 Repower HG and SCR to IGCC 0 0 0 0 Retrofit HG and SCR to SRB 0 0 0 0 Repower HG and SNCR to CC 0 0 0 0 Repower HG and SNCR to IGCC 0 0 0 0 Retrofit HG and SNCR to SRB 0 0 0 0 Repower HG and SCR and SRB to CC 0 0 0 0 Repower HG and SCR and SRB to IGCC 0 0 0 0 Repower HG and SNCR and SRB to CC 0 0 0 0 Repower HG and SNCR and SRB to IGCC 0 0 0 0 Repower HG and Gas Reburn to CC 0 0 0 0 Repower HG and Gas Reburn to IGCC 0 0 0 0 Retrofit HG and Gas Reburn to SRB 0 0 0 0 Retrofit HG to SCR 0 0 0 0 Retrofit HG to SNCR 0 0 0 0 Retrofit HG to SCR and SRB 0 0 0 0 Retrofit HG to SNCR and SRB 0 0 0 0 Retrofit HG to Gas Reburn 0 0 0 0 Retrofit HG and Scrubber 0 0 0 0 Retrofit SRB to HG and SCR 1 1 10 10 Retrofit SRB to HG and SNCR 0 0 0 0 Retrofit SRB to HG and Gas Reburn 0 0 0 0 Repower HG and SRB to CC 0 0 0 0 Repower HG and SRB to IGCC 0 0 0 0 Retrofit SCR to HG and SRB 3,642 3,642 27,124 27,124 Retrofit SNCR to HG and SRB 1 1 10 10 Retrofit Gas Reburn to HG and SRB 1 1 8 8 Total 778,541 804,935 3,712,522 3,830,050 D 19 Exhibit D 14 National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 With Mercury Cap and Trade Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Scrubbed Coal 9,504 9,504 53,429 53,548 Unscrubbed Coal 8,526 7,080 43,862 38,863 Oil/ Gas Steam 109,326 72,560 267,720 71,747 Nuclear 85,670 81,415 613,083 580,196 Hydro 93,830 93,830 276,883 276,883 Comb. Cycle Gas 54,407 94,589 319,445 534,825 IGCC 612 612 4,558 4,558 Turbine 83,981 86,146 71,410 55,281 Renewables 7,737 7,740 60,999 60,999 Pump Storage 23,046 23,046 7,286 7,984 Imports 13,350 13,350 38,004 31,017 Repower Coal to CC 0 0 0 0 Repower Oil/ Gas to CC 0 20,737 0 148,011 Repower Coal to IGCC 0 0 0 0 Retrofit Scrubber 758 758 5,649 5,649 Retrofit SCR 5,576 3,312 32,826 18,707 Retrofit SNCR 21,819 16,970 110,799 83,121 Retrofit SCR and Scrubber 0 0 0 0 Retrofit SNCR and Scrubber 0 0 0 0 Retrofit Gas Reburn 128 0 0 0 Retrofit Seasonal Gas 0 0 0 0 Retrofit Oil/ Gas SCR 348 16 1,243 23 Retrofit Oil/ Gas SNCR 3,896 3,181 12,949 3,176 Repower SCR to CC 0 0 0 0 Repower SNCR to CC 0 0 0 0 Repower Oil/ Gas SCR to CC 0 5,196 0 39,654 Repower Oil/ Gas SNCR to CC 0 1,912 0 12,377 Repower SCR to IGCC 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 Retrofit SCR to Scrubber 0 468 0 3,484 Retrofit SNCR to Scrubber 0 0 0 0 Repower Gas Reburn to CC 0 256 0 1,128 Retrofit Gas Reburn to Scrubber 0 0 0 0 Repower Gas Reburn to IGCC 0 0 0 0 Repower SCR and SRB to CC 0 0 0 0 Repower SNCR and SRB to CC 0 0 0 0 Repower SCR and SRB to IGCC 0 0 0 0 Repower SNCR and SRB to IGCC 0 0 0 0 Repower Scrubber to CC 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 Retrofit HG 81,647 81,064 590,735 559,043 D 20 Exhibit D 14 ( continued) National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 With Mercury Cap and Trade Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Retrofit SCR to HG 31,025 31,025 221,573 217,637 Retrofit SNCR to HG 64,377 64,294 392,311 383,229 Retrofit Gas Reburn to HG 382 382 2,053 2,053 Retrofit SCR and SRB to HG 727 727 5,415 5,415 Retrofit SNCR and SRB to HG 3,300 3,300 24,408 24,580 Retrofit SRB to HG 7,867 7,867 58,589 58,593 Repower HG to CC 0 2 0 9 Repower HG to IGCC 0 0 0 0 Retrofit HG to Scrubber 0 9 0 66 Retrofit HG and SCR 0 0 0 0 Retrofit HG and SNCR 3 1 20 6 Retrofit HG and SCR and SRB 0 0 0 0 Retrofit HG and SNCR and SRB 0 0 0 0 Retrofit HG and Gas Reburn 1 1 5 6 Repower HG and SCR to CC 0 0 0 0 Repower HG and SCR to IGCC 0 0 0 0 Retrofit HG and SCR to SRB 0 0 0 0 Repower HG and SNCR to CC 0 0 0 0 Repower HG and SNCR to IGCC 0 0 0 0 Retrofit HG and SNCR to SRB 0 2 0 15 Repower HG and SCR and SRB to CC 0 0 0 0 Repower HG and SCR and SRB to IGCC 0 0 0 0 Repower HG and SNCR and SRB to CC 0 0 0 0 Repower HG and SNCR and SRB to IGCC 0 0 0 0 Repower HG and Gas Reburn to CC 0 0 0 0 Repower HG and Gas Reburn to IGCC 0 0 0 0 Retrofit HG and Gas Reburn to SRB 1 1 7 7 Retrofit HG to SCR 0 0 0 0 Retrofit HG to SNCR 0 0 0 0 Retrofit HG to SCR and SRB 0 0 0 0 Retrofit HG to SNCR and SRB 0 0 0 0 Retrofit HG to Gas Reburn 0 0 0 0 Retrofit HG and Scrubber 0 0 0 0 Retrofit SRB to HG and SCR 2 2 18 18 Retrofit SRB to HG and SNCR 4 4 28 29 Retrofit SRB to HG and Gas Reburn 0 0 0 0 Repower HG and SRB to CC 0 0 0 0 Repower HG and SRB to IGCC 0 0 0 0 Retrofit SCR to HG and SRB 34,797 36,546 259,180 272,203 Retrofit SNCR to HG and SRB 29,245 33,809 217,829 250,676 Retrofit Gas Reburn to HG and SRB 2,648 3,223 19,726 24,006 Total 778,541 804,938 3,712,042 3,828,822 D 21 Exhibit D 15 National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 / High Efficiency  Carbon Level of 515 MMT in 2008 With Mercury Cap and Trade Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh)

Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Scrubbed Coal 8,738 6,411 47,767 47,201 Unscrubbed Coal 12,730 10,455 62,343 37,269 Oil/ Gas Steam 108,103 45,354 260,729 26,511 Nuclear 85,670 81,415 613,083 580,196 Hydro 93,830 93,830 276,883 276,883 Comb. Cycle Gas 44,406 112,099 231,448 697,235 IGCC 612 612 4,558 4,558 Turbine 71,958 70,636 59,240 48,867 Renewables 7,737 7,745 60,999 60,999 Pump Storage 23,046 23,046 7,316 7,025 Imports 13,350 13,350 38,004 31,017 Repower Coal to CC 0 0 0 0 Repower Oil/ Gas to CC 0 15,927 0 117,609 Repower Coal to IGCC 0 0 0 0 Retrofit Scrubber 4 4 29 29 Retrofit SCR 5,384 2,262 30,630 11,720 Retrofit SNCR 16,106 9,923 70,841 42,865 Retrofit SCR and Scrubber 0 0 0 0 Retrofit SNCR and Scrubber 0 0 0 0 Retrofit Gas Reburn 128 0 467 0 Retrofit Seasonal Gas 0 0 0 0 Retrofit Oil/ Gas SCR 16 16 89 23 Retrofit Oil/ Gas SNCR 3,794 3,284 12,916 2,050 Repower SCR to CC 0 0 0 0 Repower SNCR to CC 0 286 0 2,182 Repower Oil/ Gas SCR to CC 0 5,410 0 41,280 Repower Oil/ Gas SNCR to CC 0 1,706 0 11,966 Repower SCR to IGCC 0 0 0 0 Repower SNCR to IGCC 0 0 0 0 Retrofit SCR to Scrubber 0 0 0 0 Retrofit SNCR to Scrubber 0 0 0 0 Repower Gas Reburn to CC 0 256 0 1,335 Retrofit Gas Reburn to Scrubber 0 0 0 0 Repower Gas Reburn to IGCC 0 0 0 0 Repower SCR and SRB to CC 0 0 0 0 Repower SNCR and SRB to CC 0 0 0 0 Repower SCR and SRB to IGCC 0 0 0 0 Repower SNCR and SRB to IGCC 0 0 0 0 Repower Scrubber to CC 0 0 0 0 Repower Scrubber to IGCC 0 0 0 0 Retrofit HG 82,739 79,386 601,140 442,720 D 22 Exhibit D 15 ( continued) National Electric Generation Capacity and Generation 50 Percent SO2 Reduction in 2010 / High Efficiency  Carbon Level of 515 MMT in 2008 With Mercury Cap and Trade Capacity by Plant Type Generation by Plant Type ( MW) ( Million kWh) Generation Unit ( Retrofit Status) 2007 2010 2007 2010 Retrofit SCR to HG 39,783 39,783 282,220 266,128 Retrofit SNCR to HG 83,186 83,103 523,361 440,669 Retrofit Gas Reburn to HG 379 379 2,153 1,673 Retrofit SCR and SRB to HG 726 726 5,408 5,408 Retrofit SNCR and SRB to HG 3,300 3,300 24,580 24,580 Retrofit SRB to HG 1,326 1,327 9,872 9,883 Repower HG to CC 0 4 0 26 Repower HG to IGCC 0 0 0 0 Retrofit HG to Scrubber 1 565 7 4,208 Retrofit HG and SCR 0 0 0 0 Retrofit HG and SNCR 149 0 698 0 Retrofit HG and SCR and SRB 0 0 0 0 Retrofit HG and SNCR and SRB 0 0 0 0 Retrofit HG and Gas Reburn 945 2,014 5,735 13,699 Repower HG and SCR to CC 0 0 0 0 Repower HG and SCR to IGCC 0 0 0 0 Retrofit HG and SCR to SRB 0 0 0 0 Repower HG and SNCR to CC 0 0 0 0 Repower HG and SNCR to IGCC 0 0 0 0 Retrofit HG and SNCR to SRB 0 0 0 0 Repower HG and SCR and SRB to CC 0 0 0 0 Repower HG and SCR and SRB to IGCC 0 0 0 0 Repower HG and SNCR and SRB to CC 0 0 0 0 Repower HG and SNCR and SRB to IGCC 0 0 0 0 Repower HG and Gas Reburn to CC 0 0 0 0 Repower HG and Gas Reburn to IGCC 0 0 0 0 Retrofit HG and Gas Reburn to SRB 0 0 0 0 Retrofit HG to SCR 0 0 0 0 Retrofit HG to SNCR 0 0 0 0 Retrofit HG to SCR and SRB 0 0 0 0 Retrofit HG to SNCR and SRB 0 0 0 0 Retrofit HG to Gas Reburn 0 0 0 0 Retrofit HG and Scrubber 3,043 0 22,664 0 Retrofit SRB to HG and SCR 0 0 0 0 Retrofit SRB to HG and SNCR 0 0 0 0 Retrofit SRB to HG and Gas Reburn 0 0 0 0 Repower HG and SRB to CC 0 0 0 0 Repower HG and SRB to IGCC 0 0 0 0 Retrofit SCR to HG and SRB 25,005 25,993 186,246 193,603 Retrofit SNCR to HG and SRB 15,710 16,290 117,010 121,335 Retrofit Gas Reburn to HG and SRB 1,819 1,819 13,549 13,549 Total 753,724 758,716 3,571,983 3,586,300