Document ID: EPA-R07-OAR-2011-0675-0010
Agency: epa
Document Type: Rule
Title: Approval and Promulgation of Implementation Plans: State of Kansas; Regional Haze
Posted Date: 2011-12-27T05:00Z

[Federal Register Volume 76, Number 248 (Tuesday, December 27, 2011)]
[Rules and Regulations]
[Pages 80754-80760]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-32998]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R07-OAR-2011-0675; FRL-9611-3]

Approval and Promulgation of Implementation Plans; State of 
Kansas: Regional Haze

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: EPA is taking final action to approve a revision to the State 
Implementation Plan (SIP) for Kansas, submitted by the Kansas 
Department of Health and Environment on October 26, 2009, that 
addresses Regional Haze for the first implementation period. EPA has 
determined that the plan submitted by Kansas satisfies the requirements 
of the Clean Air Act (CAA or Act), for states to prevent any future and 
remedy and existing anthropogenic impairment of visibility in Class I 
areas caused by emissions of air pollutants located over a wide 
geographic area (also known as the ``regional haze'' program). EPA 
proposed to approve these revisions on August 23, 2011 (76 FR 52604).

DATES: Effective Date: This rule will be effective January 26, 2012.

ADDRESSES: EPA has established a docket for this action under Docket 
Identification No. EPA-R07-OAR-2011-0675. All documents in the docket 
are listed on the http://www.regulations.gov Web site. Although listed 
in the index, some information is not publicly available, i.e., 
Confidential Business Information (CBI) or other information whose 
disclosure is restricted by statute. Certain other material, such as 
copyrighted material, is not placed on the Internet and will be 
publicly available only in hard copy form. Publicly available docket 
materials are available either electronically through http://www.regulations.gov or in hard copy at the Air Planning and Development 
Branch, Air and Waste Management Division, U.S. Environmental 
Protection Agency, Region 7, 901 North 5th Street, Kansas City, KS 
66101. EPA requests that if at all possible, you contact the person 
listed in the FOR FURTHER INFORMATION CONTACT section for further 
information. The regional office's official hours of business are 
Monday through Friday, 8:30 to 4:30, excluding Federal holidays.

FOR FURTHER INFORMATION CONTACT: Chrissy Wolfersberger, Air Planning 
and Development Branch, U.S. Environmental Protection Agency, Region 7, 
901 N. 5th Street, Kansas City, Kansas 66101; by telephone at (913) 
551-7864; or by email at wolfersberger.chris@epa.gov.

SUPPLEMENTARY INFORMATION: Throughout this document, the terms ``we,'' 
``us,'' and ``our'' refer to EPA.

Table of Contents

I. Background
II. Public comments and EPA responses
III. Final action
IV. Statutory and Executive Order reviews

I. Background

    On August 23, 2011 (76 FR 52604), EPA published a notice of 
proposed rulemaking (NPR) for the State of Kansas, proposing approval 
of Kansas' regional haze plan for the first implementation period 
(through 2018). A detailed explanation of the CAA's visibility 
requirements and the regional haze rule as it applies to Kansas was 
provided in the NPR and will not be restated here. EPA's rationale for 
proposing approval of the Kansas SIP revision was described in detail 
in the proposal, and is further described in this final rulemaking.

II. Public comments and EPA responses

    The publication of EPA's proposed rule on August 23, 2011 initiated 
a 30 day public comment period that ended on September 22, 2011. During 
the public comment period we received written comments from the State 
of Colorado, the Kansas Department of Health and Environment on behalf 
of the State of Kansas (State), Kansas City Power & Light, Westar 
Energy, and the National Parks Conservation Association (NPCA). We have 
summarized the comments and provided our responses below. Full copies 
of the comment letters are available in the docket for this rulemaking.

[[Page 80755]]

    Comment #1: The State of Colorado submitted comments supportive of 
EPA's proposed approval and applauding the State of Kansas' efforts to 
evaluate and promulgate cost effective emission controls that will 
improve visibility in a number of Class I areas, including Rocky 
Mountain National Park and Great Sand Dunes National Park & Preserve.
    Response #1: We appreciate the State of Colorado's comments on our 
proposed action.
    Comment #2: The State and Westar Energy noted some transcription 
errors in table 7 of the proposed notice, titled ``Control or work 
practice strategies for Westar units to meet Kansas long term strategy 
requirements.'' Some limits for sulfur dioxide (SO2) were 
recorded as limits for nitrogen oxides (NOX), and vice 
versa. The specific errors were:
     Lawrence Unit 3: the limit of 0.18 lbs/mmBtu is for 
NOX, not SO2
     Lawrence Unit 4: the limit of 0.18 lbs/mmBtu is for 
NOX, not SO2; and the limit of 0.15 lbs/mmBtu is 
for SO2, not NOX
     Tecumseh Unit 7/9: the limit of 0.18 lbs/mmBtu is for 
NOX, not SO2
     Tecumseh Unit 8/10: limit of 0.18 lbs/mmBtu for 
NOX, not SO2.
    Response #2: EPA agrees that there were transcription errors in 
table 7. Table 7 is corrected to read as follows:

------------------------------------------------------------------------
             Facility/unit                Emission rate or work practice
------------------------------------------------------------------------
Gordon Evans Energy Center--Unit 1.....  a fuel switch to natural gas at
                                          all times, with the exception
                                          of a gas curtailment order
                                          from the gas supplier, in
                                          which case the facility will
                                          be allowed to utilize backup
                                          6 fuel oil.
Hutchinson--Unit 4.....................  a fuel switch to natural gas at
                                          all times, with the exception
                                          of a gas curtailment order
                                          from the gas supplier, in
                                          which case the facility will
                                          be allowed to utilize backup
                                          6 fuel oil.
Murray Gill--Units 1, 2, 3 and 4.......  a fuel switch to natural gas at
                                          all times, with the exception
                                          of a gas curtailment order
                                          from the gas supplier, in
                                          which case the facility will
                                          be allowed to utilize backup
                                          6 fuel oil.
Neosho--Unit 7.........................  a fuel switch to natural gas at
                                          all times, with the exception
                                          of a gas curtailment order
                                          from the gas supplier, in
                                          which case the facility will
                                          be allowed to utilize backup
                                          6 fuel oil.
Jeffrey Energy Center--Unit 3..........  an emission limit of 0.15 lbs/
                                          MMBtu for both SO2 and NOX.
Lawrence--Unit 3.......................  an emission limit of 0.18 lbs/
                                          MMBtu for NOX.
Lawrence--Unit 4.......................  an emission limit of 0.18 lbs/
                                          MMBtu for NOX; an emission
                                          limit of 0.15 lbs/MMBtu for
                                          SO2.
Lawrence--Unit 5.......................  an emission limit of 0.15 lbs/
                                          MMBtu for both SO2 and NOX.
Tecumseh--Units 7/9....................  an emission limit of 0.18 lbs/
                                          MMBtu for NOX.
Tecumseh--Units 8/10...................  an emission limit of 0.18 lbs/
                                          MMBtu for NOX.
------------------------------------------------------------------------

    Comment #3: Westar Energy noted errors in table 8 of the proposed 
approval, titled, ``Estimated NOX and SO2 
emission reductions for implementation of controls or work practices 
required by Kansas' long term strategy''. Errors in table 8 included 
listing the 2002 SO2 emissions for Lawrence Unit 5 as 
4,546.3 tons (the correct value is 4,353.7 tons), and listing the post-
control NOX emissions for Lawrence Unit 4 at 835.4 tons (the 
correct value is 1002.4 tons).
    Response #3: EPA agrees that there were errors in table 8. Table 8 
is corrected as follows:

--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                              2002 NOX     2002 SO2       Post         Post         NOX          SO2
                             Facility                                Unit    Emissions    Emissions   control NOX  control SO2   Reductions   Reductions
                                                                               (tpy)        (tpy)         (tpy)        (tpy)       (tpy)        (tpy)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Gordon Evans.....................................................        1        258.7        617.7        211.9          0.5         46.8        617.2
Hutchinson.......................................................        4        267.1        734.3        158.5          0.6        108.5        733.7
Jeffrey..........................................................        3     10,807.4     23,206.0      4,913.1      4,913.1      5,894.3     18,292.9
Lawrence.........................................................        3        728.4      1,965.4          0.0      1,965.4        728.4          0.0
Lawrence.........................................................        4      1,986.5      1,430.0      1,002.4        835.4        984.1        594.7
Lawrence.........................................................        5      3,546.3      4,353.7      2,564.7      2,564.7        981.6      1,789.0
Gill.............................................................        1          0.0          0.0          0.0          0.0          0.0          0.0
Gill.............................................................        2          4.5          0.0          4.0          0.0          0.5          0.0
Gill.............................................................        3        181.6        452.1        148.6          0.3         33.0        451.8
Gill.............................................................        4        103.8        333.3         85.2          0.2         18.7        333.1
Neosho...........................................................        7          0.0          0.0          0.0          0.0          0.0          0.0
Tecumseh.........................................................        7      1,530.6      2,692.7        691.6      2,692.7        839.0          0.0
Tecumseh.........................................................        8      1,876.9      4,514.9      1,103.1      4,514.9        773.8          0.0
                                                                  --------------------------------------------------------------------------------------
    Total........................................................  .......  ...........  ...........  ...........  ...........     10,408.7     22,812.5
--------------------------------------------------------------------------------------------------------------------------------------------------------

    Comment #4: As noted in the proposal, the State entered into 
Consent Agreements with Kansas City Power and Light and Westar Energy 
to incorporate the Best Available Retrofit Technology (BART) emission 
rates, compliance schedules, monitoring, recordkeeping, reporting, and 
enforceability requirements. EPA proposed to disapprove specific 
startup, shutdown and malfunction (SSM) provisions in the State's 
regional haze Consent Agreements with Westar Energy and Kansas City 
Power and Light that were submitted as part of the regional haze SIP. 
The State commented that EPA's proposed exclusion of periods of SSM 
from the Consent Agreements has the effect of making the BART emission 
limits more stringent. The State requested that EPA consider fully

[[Page 80756]]

approving the SIP revision. Kansas City Power and Light commented that 
the proposed approval of the Kansas Regional Haze SIP excluding the SSM 
provisions fundamentally changes the basis of the emission limits, and 
because the SSM provisions were agreed to through good faith 
negotiations with the State, Kansas City Power and Light asked that the 
Agreements be renegotiated. Westar Energy made similar comments, 
disagreeing with the proposed disapproval of the SSM provisions in the 
Consent Agreement between the State and Westar Energy.
    Response #4: As EPA explained in the proposed notice, the Consent 
Agreements exempted periods of startup and shutdown for both Kansas 
City Power and Light and Westar Energy from compliance with applicable 
emission limits, which were not narrowly defined, and exempted periods 
of malfunction for Westar Energy. EPA proposed to disapprove the 
exemptions because they are inconsistent with the Clean Air Act and 
EPA's September 20, 1999, guidance, ``State Implementation Plans: 
Policy Regarding Excess Emissions during Malfunctions, Startup and 
Shutdown.'' \1\
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    \1\ Steven Herman, Assistant Administrator for Enforcement and 
Compliance Assurance, and Robert Perciasepe, Assistant Administrator 
for Air and Radiation, ``State Implementation Plans (SIPs): Policy 
Regarding Excess Emissions During Malfunctions, Startup, and 
Shutdown,'' September 20, 1999; and 52 FR (45109 November 24, 1987).
---------------------------------------------------------------------------

    EPA subsequently received a letter from the State dated December 1, 
2011, withdrawing the SSM provisions in the Consent Agreements in their 
entirety from the regional haze SIP. Specifically, the following four 
provisions were withdrawn from EPA's consideration for approval in the 
regional haze SIP:
    1. All references to, ``excluding periods of startup and shutdown'' 
in Paragraph 23 of the Kansas City Power and Light Company regional 
haze agreement;
    2. The reference to, ``excluding periods of startup, shutdown and 
malfunction'' in footnote 1 of Appendix A to the Westar Energy, Inc. 
regional haze agreement;
    3. All references to, ``excluding periods of startup and shutdown'' 
in Chapter 9.3.1 of the Kansas regional haze SIP;
    4. And the sentence, ``The Agreements between KDHE and the affected 
BART sources currently exclude emissions associated with startup, 
shutdowns, and malfunctions (SSM) in the agreed upon emission limits'' 
in Chapter 9.5 of the Kansas regional haze SIP.
    Since the SSM provisions were withdrawn by the State, and are 
therefore no longer before EPA, neither EPA's proposed disapproval of 
these exemptions nor the comments on that proposed disapproval are 
relevant to this final action.
    Comment #5: NPCA commented that Kansas' regional haze plan is 
incomplete and insufficient, because of what NPCA considers an 
incomplete five step BART analysis at Westar Energy Jeffrey Energy 
Center Units 1 and 2, and at Kansas City Power and Light La Cygne Units 
1 and 2. NPCA states that requiring presumptive limits does not negate 
the need for a State to determine BART for each source subject to BART 
on a case-by-case basis through a five factor analysis. NPCA stated 
that the most stringent emissions rate the various technologies are 
capable of achieving needs to be analyzed for cost and visibility 
improvement in order to make an adequate BART determination. NPCA 
offered a number of specific comments about these units, which are 
listed and addressed separately below.
    NPCA asserted that selective catalytic reduction (SCR) is a cost-
effective technology to control NOX emissions. As such, NPCA 
believes that SCR should be required as BART for Westar Energy Jeffrey 
Units 1 and 2. The original BART analysis for these units examined SCR 
at an emission rate of 0.10 lbs/MMBtu and determined that the cost 
effectiveness was $2,211/ton of NOX removed and $1,738/ton 
of NOX removed for Units 1 and 2, respectively. NPCA states 
that these costs, while reasonable, are improperly inflated due to the 
State's low control efficiency assumptions; and that SCR is capable of 
achieving a lower emissions rate than what the State assumed in its 
BART analysis, such as 0.05 lbs/MMBtu.
    Response #5: On December 1, 2011, the State provided supplemental 
information on incremental cost and visibility improvement for various 
control strategies for Westar Energy Jeffrey Energy Center Units 1 and 
2, and Kansas City Power and Light La Cygne Units 1 and 2. This 
information is available in the docket for this rulemaking. The 
supplemental dispersion modeling provided by the State was conducted 
with the CALPUFF model using the same inputs that were used during the 
original BART analysis, except that the emissions rates were changed to 
determine visibility improvement from various control options. 
Visibility impacts were evaluated at five Class I areas: Caney Creek 
and Upper Buffalo in Arkansas, Hercules Glades and Mingo in Missouri, 
and Wichita Mountains in Oklahoma. The State also obtained or developed 
annualized costs for the additional equipment that would be required to 
be installed in order to achieve lower emission rates.
    The BART cost analysis for SCR at Jeffrey Units 1 and 2 was 
performed based on an emission limit of 0.10 lbs/MMBtu, which is within 
the range of effectiveness that the State believed to be reasonable as 
a retrofit control on older tangential-fired units. The State assumed a 
control efficiency of 79-80 percent, which is in the mid-range of 
control efficiencies demonstrated for SCR, as noted by NPCA in their 
comments. EPA believes the State's decision to choose a control 
efficiency within the middle of the range for the purpose of estimating 
cost is a reasonable approach and is acceptable according to the BART 
Guidelines.\2\ In the BART analysis, SCR operated at a rate of 0.10 
lbs/MMBtu was evaluated for incremental cost improvements and was 
excluded as BART based on the high incremental cost for the associated 
low incremental visibility improvements.
---------------------------------------------------------------------------

    \2\ 40 CFR part 51, Appendix Y: Guidelines for BART 
Determinations Under the Regional Haze Rule.
---------------------------------------------------------------------------

    The State subsequently provided additional cost and visibility 
information for SCR at Jeffrey Units 1 and 2, assuming an emissions 
rate of 0.08 lbs/MMBtu. The State asserted that the 0.05 lb/MMBtu rate 
was not reasonable to evaluate as retrofit for 35 year old tangential-
fired units. The difference in modeled impact for Jeffrey Unit 1 
between the SCR scenario (0.08 lbs NOX/MMBtu) and the low 
NOX burner (LNB) scenario (0.15 lbs NOX/MMBtu) at 
Hercules Glades, the most impacted Class I area, is 0.048 deciviews 
(dv) of additional improvement. The difference in the cumulative 
improvement across all five Class I areas for this scenario is 0.161 
dv. The annualized incremental cost of these controls is $13,362,820 in 
2005 dollars, which we calculated to be $5,374 per ton.
    The use of SCR at Jeffrey Unit 2 has similar incremental costs as 
for Jeffrey Unit 1, but less visibility improvement. Incremental 
visibility improvement resulting from tightening the presumptive 
NOX rate of 0.15 lbs/MMBtu to a rate of 0.08 lbs/MMBtu is 
0.042 dv at Upper Buffalo, and 0.153 dv cumulatively across the five 
Class I areas. The incremental annual cost of these controls is 
$13,345,950, for an incremental cost per ton of $5,367.
    The State concluded that these additional NOX reduction 
costs are high

[[Page 80757]]

for the associated low incremental visibility improvements for Jeffrey 
Units 1 and 2, and changes to the proposed BART emission limits are not 
warranted. EPA agrees that based on the low visibility improvements and 
high costs of additional control, it is reasonable to determine that no 
changes to the proposed BART emission limits are warranted. It is also 
consistent with the BART Guidelines, which provide the State 
flexibility to determine the weight and significance of the five 
factors. EPA finds little support in the State's information for the 
statement that a rate of 0.05 lbs/MMBtu is not reasonable to evaluate 
for older tangential-fired units. However, it is reasonable to conclude 
that the costs and visibility improvement of SCR operated at a rate of 
0.05 lbs/MMBtu would lead to a similar conclusion that the additional 
costs would be high for the associated low incremental visibility 
improvement. Therefore, EPA finds that no changes to the BART 
determinations or to the SIP are needed in response to this comment.
    In addition, EPA notes that following the State's BART 
determinations and submission of the regional haze SIP, Westar Energy, 
EPA, and the State entered into a Federal Consent Decree in resolution 
of alleged violations of the Clean Air Act.\3\ Under the Consent 
Decree, Westar Energy is required to install an SCR on Jeffrey Unit 1, 
2, or 3 by December 31, 2014 in order to achieve and maintain a 30-day 
rolling average unit emission rate for NOX of no greater 
than 0.080 lbs/MMBtu. By December 31, 2012 Westar Energy must elect to 
install a second SCR on one of the other two Jeffrey units, or meet a 
0.100 lbs/MMBtu plant-wide 12-month rolling average emission rate for 
NOX. If Westar Energy elects to install the second SCR, it 
is to be installed by December 31, 2016 to achieve and maintain a 30-
day rolling average unit emission rate for NOX of no greater 
than 0.070 lbs/MMBtu. Additionally, the Jeffrey plant must comply with 
a plant-wide 12 month rolling tonnage limitation of 9600 tons. 
Therefore, following implementation of the regional haze requirements 
and the Consent Decree provisions, the Westar Jeffrey Units will be 
well controlled for NOX.
---------------------------------------------------------------------------

    \3\ United States and Kansas v. Westar Energy, Inc., Civil 
Action No. 09-CV-2059 JAR/DJW (D. Kan. March 26, 2010).
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    Comment #6: NPCA commented that overfire air and selective non-
catalytic reduction (SNCR) were determined to be feasible technologies 
during the BART analysis, but were not evaluated for cost or visibility 
impacts at Jeffrey Units 1 and 2. NPCA commented that LNB or ultra LNB 
with SCR was likewise not evaluated, despite the BART analysis noting 
that such combinations can achieve reductions up to 97 percent.
    Response #6: Overfire air was considered along with LNB, so this 
combination of controls was included in the cost and visibility 
analysis submitted by the State. Likewise, LNB was included with the 
consideration of SCR, as it makes the SCR less expensive to build.
    The State subsequently provided cost and visibility information for 
SNCR operated at 0.10 lbs/MMBtu at these units. For Jeffrey Unit 1, the 
change in visibility improvement between the SNCR scenario (0.10 lbs 
NOX/MMBtu) and the LNB scenario (0.15 lbs NOX/
MMBtu) at Hercules Glades was 0.030 dv. The difference in the 
cumulative improvement across all five Class I areas for this scenario 
was 0.090 dv. The annual incremental cost of these controls is 
$3,103,877, for an incremental cost per ton of $1,748.
    The results for SNCR at Jeffrey Unit 2 are similar--0.020 dv of 
improvement at Wichita Mountains and 0.080 dv cumulative improvement 
across all five Class I areas. The annual incremental cost of these 
controls is $3,103,877, for an incremental cost per ton of $1,478.
    The State concluded that the additional NOX reduction 
costs are high for the associated low incremental visibility 
improvements for Jeffrey Units 1 and 2, and do not warrant changes to 
the proposed BART controls. Although the costs are likely cost 
effective on a per ton basis, the BART Guidelines provide the State 
flexibility to determine the weight and significance of the five 
factors, and EPA agrees that the State reasonably determined that the 
costs of further control are not warranted based on the low additional 
visibility improvements. Therefore, EPA finds that no changes to the 
BART determinations or to the SIP are needed in response to this 
comment.
    Comment #7: NPCA commented that the BART determinations for La 
Cygne Units 1 and 2 were flawed due to an incomplete analysis of SCR 
and other NOX control options. La Cygne Unit 1 has an 
existing SCR, but NPCA asserted that the most stringent rate the SCR is 
capable of achieving at Unit 1 was not analyzed. NPCA commented that a 
control technology has not actually been selected for Unit 2; rather, 
an overall emissions rate was established as BART. NPCA claims that SCR 
with the lowest achievable emissions rate should be evaluated as BART 
for Unit 2 and would likely be shown to be cost effective. NPCA 
commented that other combinations of NOX controls should 
also be evaluated for Unit 2, including overfire air, LNB, and the 
combination of SCR with feasible combustion controls.
    Response #7: The State's evaluation of the BART analysis for La 
Cygne Units 1 and 2 for NOX resulted in the decision that 
establishing a combined emissions limit for both units with a rate of 
0.13 lbs/MMBtu was BART.
    For Unit 1, as a part of the BART analysis, the State reviewed 
EPA's Clean Air Markets Division and the Energy Information Agency's 
databases for emissions data on cyclone boilers equipped with SCR 
technology. A relatively small number of cyclone boilers were so 
equipped at that time and their emission rates varied both above and 
below the presumptive NOX rate. Based on this information, 
the State determined that a rate of 0.10 lbs/MMBtu was a reasonably 
stringent rate to evaluate for the existing control.
    NPCA is correct that SCR was not specified as BART for Unit 2; 
rather, a combined rate for La Cygne Units 1 and 2 was specified as 
BART. While a range of control technologies must be evaluated in order 
to make a BART determination, EPA believes that it is acceptable to 
establish an enforceable emission limit as BART, rather than specifying 
a control technology to achieve it.
    The State subsequently provided additional visibility and cost 
information to show the incremental visibility improvement that would 
result from requiring lower NOX emission rates for Unit 2. 
The annualized cost for SCR on Kansas City Power and Light La Cygne 
Unit 2 was obtained from Table 5.5 of the BART analysis.\4\ The State 
claimed that in order to achieve a lower emissions rate, the size of 
the SCR would need to be scaled up, resulting in concurrent increases 
in electrical demand, in raw materials, and maintenance. The 
incremental annualized cost for these additional capital and 
operational costs was estimated to be 20 percent greater than the 
initial cost projection for the SCR. The change in visibility 
improvement between the proposed BART emission rate (0.23 lbs 
NOX/MMBtu) and the Unit 2 SCR scenario (0.08 lbs 
NOX/MMBtu) was 0.082 dv for Upper Buffalo. The difference in 
the cumulative improvement across all five Class I areas is 0.25 dv. 
The annualized incremental cost of controls in this

[[Page 80758]]

scenario is $2,981,706, for an incremental cost per ton of $548.
---------------------------------------------------------------------------

    \4\ BART Five Factor Analysis for Kansas City Power and Light La 
Cygne Generating Station, prepared by Trinity Consultants, August 
2007.
---------------------------------------------------------------------------

    As with the Jeffrey units, overfire air was considered along with 
LNB, so this combination of control technologies has already been 
evaluated.
    The annualized cost for SNCR control on Kansas City Power and Light 
La Cygne Unit 2 was determined by using SNCR costs obtained from 
Jeffrey Unit 1, and scaling the dollar amount using heat input and 
NOX rates. The change in visibility improvement between the 
proposed BART emissions rate (0.23 lbs NOX/MMBtu) and the 
Unit 2 SNCR scenario (0.14 lbs NOX/MMBtu) is 0.044 dv for 
Hercules Glades. The difference in the cumulative improvement across 
all five Class I areas is 0.12 dv. The annualized incremental cost of 
controls in this scenario is $972,747, for an incremental cost per ton 
of $298.
    The State concluded that the additional NOX reduction 
costs are high for the associated low incremental visibility 
improvements for La Cygne Units 1 and 2, and do not warrant changes to 
the proposed BART controls. The BART Guidelines provide the State the 
flexibility to determine the weight and significance of the five 
factors. Although the costs appear to be reasonable on a cost per ton 
basis, EPA has some concern with the scaling methodology utilized by 
the State to arrive at cost estimates for the lower NOX 
rates. However, given the low visibility improvements associated with 
the additional control, EPA agrees it is reasonable to determine that 
the costs of further control are not warranted and no changes to the 
BART determinations or to the SIP are needed in response to this 
comment.
    EPA also notes that since the time of the State's BART 
determinations and submission of the regional haze SIP, Kansas City 
Power and Light applied for a permit to install SCR on La Cygne Unit 2. 
The permit was effective March 16, 2011.\5\ In order for the permit to 
remain valid, Kansas City Power and Light must commence construction 
within 18 months of the permit's effective date (by September 2012).
---------------------------------------------------------------------------

    \5\ Construction Permit issued to Kansas City Power and Light 
Company for the La Cygne Generating Station. Permit effective March 
16, 2011.
---------------------------------------------------------------------------

    Comment #8: NPCA commented that while La Cygne Units 1 and 2 and 
Jeffrey Units 1 and 2 have proposed to either install or upgrade 
scrubbers at all four units to control SO2 emissions, the 
State's analysis was incomplete in that it lacked an evaluation of the 
most stringent emission limits the technology is capable of achieving. 
NPCA claims that scrubbers, both wet and dry, are capable of emission 
reductions below the proposed BART emission rates of 0.15 lbs/MMBtu at 
Jeffrey and 0.10 lbs/MMBtu at La Cygne. NPCA suggests that scrubbers 
are capable of achieving 0.03 to 0.05 lbs/MMBtu at each unit.
    Response #8: The State's evaluation of the BART analysis for 
Jeffrey Units 1 and 2 for SO2 resulted in the determination 
that rebuilding the existing wet scrubber units and meeting a rate of 
0.15 lbs/mmBtu was BART. The State did not believe that it was feasible 
to achieve an emissions rate of 0.05 lbs/MMBtu with rebuilt technology, 
so costs and visibility improvements were subsequently provided for the 
installation of a new scrubber operating at 0.05 lbs/MMBtu for both 
Jeffrey units. The State obtained annualized costs for new scrubbers on 
Jeffrey Units 1 and 2 from Westar Energy. The change in visibility 
improvement between the new wet scrubber scenario (0.05 lbs 
SO2/MMBtu) and the proposed BART emission limit (0.15 lbs 
SO2/MMBtu) for Jeffrey Unit 1 was 0.052 dv at Hercules 
Glades. The difference in the cumulative improvement across all five 
Class I areas is 0.168 dv. The annualized incremental cost of controls 
in this scenario is $23,567,203, for an incremental cost per ton of 
$6,635.
    The differences for Jeffrey Unit 2 under these scenarios are 
comparable to Unit 1--0.057 dv improvement at Hercules Glades, and 
0.160 cumulatively. The annualized incremental cost of controls in this 
scenario was $23,567,203, for an incremental cost per ton of $6,635.
    The State concluded that the additional SO2 reduction 
costs are high given the low incremental visibility improvements for 
Jeffrey Units 1 and 2, and do not warrant changes to the proposed BART 
emission rates. EPA has some concern with the assumptions used by the 
State in arriving at the cost estimates, however, given the very low 
visibility improvement modeled for the additional control, consistent 
with the BART Guidelines which provide the State flexibility to 
determine the weight and significance of the five factors, EPA agrees 
it is reasonable to determine that the costs of further control are not 
warranted and no changes to the BART determinations or to the SIP are 
needed in response to this comment.
    EPA also notes, as was referenced above, since the time of the 
State's BART determinations and submission of the regional haze SIP, 
Westar Energy, EPA and the State entered into a Federal Consent Decree 
in resolution of alleged violations of the Clean Air Act. The Consent 
Decree requires that Jeffrey Units 1 and 2 each meet a 30-day rolling 
average unit removal efficiency for SO2 of at least 97 
percent or a 30-day rolling average unit emission rate for 
SO2 of 0.070 lbs/MMBtu. Therefore, following implementation 
of the regional haze requirements and the Consent Decree, Jeffrey Units 
1 and 2 will be well controlled for SO2.
    The State's evaluation of the BART analysis for La Cygne Units 1 
and 2 for SO2 resulted in the determination that a combined 
emissions limit for both units at rate of 0.10 lbs/MMBtu was BART. Unit 
1 has an existing scrubber that will be modified to separate the PM 
control from the SO2 control resulting in increased 
SO2 removal efficiency. Unit 2, which did not have an 
existing scrubber, will be retrofitted with a new scrubber. The 
combined BART emission rate chosen for SO2 controls is 
within the range of expected removal efficiencies, considering one unit 
is a retrofitted scrubber.
    The State subsequently provided additional cost and visibility 
information to further evaluate lower SO2 emission rates. 
The State estimated the incremental annualized cost estimate to be 20 
percent greater than the initial cost projection for the scrubber, 
because of the increased electrical demand, raw material costs, and 
maintenance costs associated with achieving a more stringent emissions 
rate.
    For the Unit 1 scrubber at La Cygne, the change in visibility 
improvement from the presumptive BART emissions rate (0.15 lbs 
SO2/MMBtu) to a lower rate (0.05 lbs SO2/mmBtu) 
is 0.04 dv at Caney Creek. The difference in the cumulative improvement 
across all five Class I areas for this scenario is 0.12 dv. The 
annualized incremental cost of controls in this scenario is $6,098,239, 
for an incremental cost per ton of $1,495. The La Cygne Unit 2 scrubber 
scenario is comparable: 0.04 dv improvement at Hercules Glades, and 
0.097 dv cumulative improvement. The annualized incremental cost of 
controls in this scenario is $5,427,642, for an incremental cost per 
ton of $1,495.
    The State concluded that the additional SO2 reduction 
costs are high given the associated low incremental visibility 
improvements for La Cygne Units 1 and 2, and changes to the proposed 
BART controls are not warranted. Although the costs appear to be 
reasonable on a cost per ton basis, EPA has some concern with the 
scaling methodology utilized by the State to arrive at the cost 
estimates for the lower SO2 rate. However, given the low 
additional visibility improvement, consistent with the BART Guidelines

[[Page 80759]]

which provide the State flexibility to determine the weight and 
significance of the five factors, EPA agrees it is reasonable to 
determine that the costs of further control are not warranted and no 
changes to the BART determinations or to the SIP are needed in response 
to this comment.
    Comment #9: NPCA commented that the proposed SIP fails to address 
cumulative impact of Kansas BART sources on all Class I areas impacted. 
NPCA says that the modeling results presented in the proposed approval 
do not provide for a determination of the cumulative impact from 
Jeffrey Units 1 and 2 or La Cygne Units 1 and 2. NPCA notes that the 
four BART units mentioned above impact nine Class I areas, but the 
State only provided visibility information for five Class I areas.
    Response #9: In order to keep the size of the modeling domain 
manageable, the State chose to conduct refined modeling on the five 
most impacted Class I areas. Given the level of the modeled impacts at 
these five Class I areas, EPA does not believe that the State was 
unreasonable in streamlining its modeling exercise to exclude the other 
four Class I areas from its visibility analysis. Given the overall 
modeled impacts at the most impacted Class I areas, taking into account 
the impacts at the other four areas would have been unlikely to 
significantly change the State's conclusions about BART emission 
limits. Therefore, EPA believes that no changes to the BART 
determinations or to the SIP are needed in response to this comment.

III. Final Action

    EPA is taking final action to approve the State of Kansas' Regional 
Haze SIP, submitted on November 9, 2009, with supplemental information 
provided in December 2011, including a letter dated December 1, 2011, 
in which the State withdrew specific SSM provisions of the regional 
haze SIP from EPA's consideration. EPA finds that the Kansas regional 
haze SIP submittal meets all of the applicable Regional Haze 
requirements set forth in section 169A and 169B of the Act and in the 
Federal regulations codified at 40 CFR 51.300-308, and the requirements 
of 40 CFR Part 51, Subpart F and Appendix V.

IV. Statutory and Executive Order Reviews

    Under the Clean Air Act, the Administrator is required to approve a 
SIP submission that complies with the provisions of the Act and 
applicable Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). 
Thus, in reviewing SIP submissions, EPA's role is to approve State 
choices, provided that they meet the criteria of the CAA. Accordingly, 
this action merely approves State law as meeting Federal requirements 
and does not impose additional requirements beyond those imposed by 
State law. For that reason, this action:
     Is not a ``significant regulatory action'' subject to 
review by the Office of Management and Budget under Executive Order 
12866 (58 FR 51735, October 4, 1993);
     Does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     Is certified as not having a significant economic impact 
on a substantial number of small entities under the Regulatory 
Flexibility Act (5 U.S.C. 601 et seq.);
     Does not contain any unfunded mandate or significantly or 
uniquely affect small governments, as described in the Unfunded 
Mandates Reform Act of 1995 (Pub. L. 104-4);
     Does not have Federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Is not an economically significant regulatory action based 
on health or safety risks subject to Executive Order 13045 (62 FR 
19885, April 23, 1997);
     Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001);
     Is not subject to requirements of Section 12(d) of the 
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 
note) because application of those requirements would be inconsistent 
with the CAA; and
     Does not provide EPA with the discretionary authority to 
address, as appropriate, disproportionate human health or environmental 
effects, using practicable and legally permissible methods, under 
Executive Order 12898 (59 FR 7629, February 16, 1994).
    Executive Order 13175, entitled ``Consultation and Coordination 
with Indian Tribal Governments'' (65 FR 67249, November 9, 2000), 
requires EPA to develop an accountable process to ensure ``meaningful 
and timely input by tribal officials in the development of regulatory 
policies that have tribal implications.'' This rule does not have 
tribal implications, as specified in Executive Order 13175. It will not 
have substantial direct effects on tribal governments. Thus, Executive 
Order 13175 does not apply to this rule.

List of Subjects in 40 CFR Part 52

    Air pollution control, Environmental protection, Incorporation by 
reference, Intergovernmental relations, Nitrogen oxides, Particulate 
matter, Reporting and recordkeeping requirements, Sulfur dioxide, 
Volatile organic compounds.

    Dated: December 15, 2011.
Karl Brooks,
Regional Administrator, Region 7.
    40 CFR part 52 is amended as follows:

PART 52--[AMENDED]

0
1. The authority citation for part 52 continues to read as follows:

    Authority:  42 U.S.C. 7401 et seq.

Subpart R--Kansas

0
2. In Sec.  52.870:
0
a. The table in paragraph (d) is amended by revising the table headings 
and adding entries (3) and (4) in numerical order.
0
b. The table in paragraph (e) is amended by adding entry (33) in 
numerical order.
    The revisions and additions read as follows:

Sec.  52.870  Identification of plan.

* * * * *
    (d) * * *

                               EPA--Approved Kansas Source--Specific Requirements
----------------------------------------------------------------------------------------------------------------
                                                         State
          Name of source               Permit or       effective      EPA approval date         Explanation
                                       case No.          date
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
(3) Kansas City Power and Light     ..............         12/5/07  12/27/11, [Insert      Certain provisions
 Company.                                                            Federal Register       withdrawn from plan
                                                                     citation].             as identified in
                                                                                            letter dated 12/1/11
                                                                                            from Kansas.

[[Page 80760]]

 
(4) Westar Energy, Inc............  ..............         2/29/08  12/27/11, [Insert      Certain provisions
                                                                     Federal Register       withdrawn from plan
                                                                     citation].             as identified in
                                                                                            letter dated 12/1/11
                                                                                            from Kansas.
 
                                                  * * * * * * *
----------------------------------------------------------------------------------------------------------------

* * * * *
    (e) * * *

                                  EPA--Approved Kansas Nonregulatory Provisions
----------------------------------------------------------------------------------------------------------------
                                        Applicable
    Name of nonregulatory SIP         geographic or          State       EPA approval date       Explanation
            provision               nonattainment area  submittal date
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
(33) Regional Haze Plan for the    Statewide..........         11/9/09  12/27/11, [Insert    Certain provisions
 first implementation period.                                            Federal Register     withdrawn from
                                                                         citation].           plan as identified
                                                                                              in letter dated 12/
                                                                                              1/11 from Kansas.
----------------------------------------------------------------------------------------------------------------

[FR Doc. 2011-32998 Filed 12-23-11; 8:45 am]
BILLING CODE 6560-50-P