Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Indiana; Lake County Sulfur Dioxide Regulations, Redesignation and Maintenance Plan, 43820-43826 [05-15058]

Agencies

• ENVIRONMENTAL PROTECTION AGENCY

[Federal Register Volume 70, Number 145 (Friday, July 29, 2005)]
[Proposed Rules]
[Pages 43820-43826]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-15058]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[R05-OAR-2005-IN-0004; FRL-7946-3]


Approval and Promulgation of Implementation Plans and Designation 
of Areas for Air Quality Planning Purposes; Indiana; Lake County Sulfur 
Dioxide Regulations, Redesignation and Maintenance Plan

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: EPA is proposing to approve a State Implementation Plan (SIP) 
revision for the control of sulfur dioxide (SO2) emissions 
in Lake County, Indiana. The SIP revision submitted by the Indiana 
Department of Environmental Management (IDEM) on April 8, 2005, and 
supplemented on July 6, 2005, amends 326 Indiana Administrative Code 
(IAC) Article 7. Indiana's revised SO2 rule consists of 
changes to 326 IAC 7-4 which sets forth facility-specific 
SO2 emission limitations and recordkeeping requirements for 
Lake County. The rule revision also reflects updates to company names, 
updates to emission limits currently in permits, deletion of facilities 
that are already covered by natural gas limits, or other corrections or 
updates. Due to changes in section numbers, references to citations in 
other parts of the rule have also been updated. EPA is also proposing 
to approve a request to redesignate the Lake County nonattainment area 
to attainment of the SO2 National Ambient Air Quality 
Standards (NAAQS), which was submitted for parallel processing by IDEM 
on June 21, 2005. In conjunction with these actions, EPA is also 
proposing to approve the maintenance plan for the Lake County 
nonattainment area to ensure that attainment of the NAAQS will be 
maintained. The SIP revision, redesignation request and maintenance 
plan are approvable because they satisfy the requirements of the Clean 
Air Act (Act). The rationale for the approval and other information are 
provided in this notice.

DATES: Comments must be received on or before August 29, 2005.

ADDRESSES: Submit comments, identified by Regional Material in EDocket 
(RME) ID No. R05-OAR-2005-IN-0004, by one of the following methods:
    Federal eRulemaking Portal: https://www.regulations.gov. Follow the 
on-line instructions for submitting comments.
    Agency Web site: https://docket.epa.gov/rmepub/. Regional RME, EPA's 
electronic public docket and comments system, is EPA's preferred method 
for receiving comments. Once in the system, select ``quick search,'' 
then key in the appropriate RME Docket identification number. Follow 
the on-line instructions for submitting comments.
    E-mail: mooney.john@epa.gov.
    Fax: (312) 886-5824.
    Mail: You may send written comments to: John M. Mooney, Chief, 
Criteria Pollutant Section, (AR-18J), U.S. Environmental Protection 
Agency, 77 West Jackson Boulevard, Chicago, Illinois 60604.
    Hand delivery: Deliver your comments to: John M. Mooney, Chief, 
Criteria Pollutant Section, (AR-18J),

[[Page 43821]]

U.S. Environmental Protection Agency, Region 5, 77 West Jackson 
Boulevard, 18th floor, Chicago, Illinois 60604. Such deliveries are 
only accepted during the Regional Office's normal hours of operation. 
The Regional Office's official hours of business are Monday through 
Friday, 8:30 a.m. to 4:30 p.m. excluding Federal holidays.
    Instructions: Direct your comments to RME ID No. R05-OAR-2005-IN-
0004. EPA's policy is that all comments received will be included in 
the public docket without change, including any personal information 
provided, unless the comment includes information claimed to be 
Confidential Business Information (CBI) or other information whose 
disclosure is restricted by statute. Do not submit information that you 
consider to be CBI or otherwise protected through RME, regulations.gov, 
or e-mail. The EPA RME Web site and the Federal regulations.gov Web 
site are ``anonymous access'' systems, which means EPA will not know 
your identity or contact information unless you provide it in the body 
of your comment. If you send an e-mail comment directly to EPA without 
going through RME or regulations.gov, your e-mail address will be 
automatically captured and included as part of the comment that is 
placed in the public docket and made available on the Internet. If you 
submit an electronic comment, EPA recommends that you include your name 
and other contact information in the body of your comment and with any 
disk or CD-ROM you submit. If EPA cannot read your comment due to 
technical difficulties and cannot contact you for clarification, EPA 
may not be able to consider your comment. Electronic files should avoid 
the use of special characters, any form of encryption, and be free of 
any defects or viruses.
    Docket: All documents in the electronic docket are listed in the 
RME index at https://docket.epa.gov/rmepub/. Although listed in the 
index, some information is not publicly available, i.e., CBI or other 
information whose disclosure is restricted by statute. Publicly 
available docket materials are available either electronically in RME 
or in hard copy at Environmental Protection Agency, Region 5, Air and 
Radiation Division, 77 West Jackson Boulevard, Chicago, Illinois 60604. 
We recommend that you telephone Christos Panos, Environmental Engineer, 
at (312) 353-8328 before visiting the Region 5 office. This Facility is 
open from 8:30 a.m. to 4:30 p.m., Monday through Friday, excluding 
legal holidays.

FOR FURTHER INFORMATION CONTACT: Christos Panos, Environmental 
Engineer, Criteria Pollutant Section, Air Programs Branch (AR-18J), 
U.S. Environmental Protection Agency, Region 5, 77 West Jackson 
Boulevard, Chicago, Illinois 60604, (312) 353-8328. 
panos.christos@epa.gov.

SUPPLEMENTARY INFORMATION: Throughout this document whenever ``we,'' 
``us,'' or ``our'' is used, we mean EPA. This supplemental information 
section is arranged as follows:

I. General Information
    1. What action is EPA taking today?
    2. Why is EPA taking this action?
II. Review of the State Submittals
    1. What is the background for this action?
    2. What information did Indiana submit, and what were its 
requests?
    3. What changes did Indiana make to the Lake County 
SO2 rules?
    4. What are the results of the modeled attainment demonstration?
III. State Implementation Plan Approval
    1. What requirements do SO2 nonattainment areas have 
to meet?
    2. How does the State's SIP revision meet the requirements of 
the Act?
IV. Redesignation Evaluation
    1. What are the criteria used to review redesignation requests?
    2. How are these criteria satisfied for Lake County?
V. Maintenance Plan
    What are the maintenance plan requirements?
VI. Proposed Rulemaking Action and Solicitation of Public Comment
VII. Statutory and Executive Order Reviews

I. General Information

1. What Action Is EPA Taking Today?

    In this action, EPA is proposing to approve into the Indiana SIP 
SO2 emission limitations applicable in Lake County, Indiana. 
Specifically, EPA is proposing to approve amendments to rules 326 IAC 
7-1.1-1, 326 IAC 7-1.1-2, 326 IAC 7-2-1, and newly created 326 IAC 7-
4.1. The revised rules were adopted by the Indiana Air Pollution 
Control Board on March 2, 2005, and were submitted by IDEM to EPA on 
April 8, 2005. IDEM submitted a supplement to its submission on July 6, 
2005, indicating that the revised rules became effective June 24, 2005 
and were published in the Indiana Register on July 1, 2005. EPA is also 
proposing to approve the SO2 redesignation request submitted 
by the State of Indiana to redesignate the Lake County SO2 
nonattainment area to attainment of the SO2 NAAQS. Finally, 
EPA is proposing to approve the maintenance plan submitted for this 
area.

2. Why Is EPA Taking This Action?

    EPA is taking this action because the State's submittal for the 
Lake County SO2 nonattainment area is fully approvable. The 
revised rules amend SO2 requirements for many sources in the 
nonattainment area, and reflect a reduction of over 30,000 tons of 
SO2 per year of allowable emissions compared to the emission 
limits in the previously approved 1989 SIP. The SIP revision provides 
for attainment and maintenance of the SO2 NAAQS and 
satisfies the requirements of part D of the Act applicable to 
SO2 nonattainment areas. Further, EPA is approving the 
maintenance plan and redesignating the Lake County SO2 
nonattainment area to attainment because the State has met the 
redesignation and maintenance plan requirements of the Act. Under the 
Act, EPA may redesignate nonattainment areas to attainment if 
sufficient data are available to warrant such changes and the area 
meets the criteria contained in section 107(d)(3)(E). This includes 
full approval of a maintenance plan for the area. The requirements for 
a maintenance plan are found in section 175A of the Act. A more 
detailed explanation of how the State's submittal meets these 
requirements is contained below.

II. Review of the State Submittals

1. What Is the Background for This Action?

    Lake County is located in northwest Indiana and is surrounded by 
the Indiana counties of Porter, Jasper and Newton. On March 3, 1978, at 
43 FR 8962, EPA designated a portion of Lake County as a primary 
SO2 nonattainment area, based on monitored violations of the 
primary SO2 NAAQS. The SO2 nonattainment area of 
Lake County is bounded by Lake Michigan to the north, the Indiana-
Illinois State line to the west, the Lake-Porter County line on the 
east, and on the south it is bounded by U.S. 30 from the State line to 
the intersection of I-65, then following I-65 to the intersection of I-
94, then following I-94 to the Lake-Porter County line. EPA approved a 
SO2 SIP revision for Lake County on January 19, 1989 (54 FR 
2112), consisting of source specific emission limits and other 
requirements in Indiana's county-specific rules. There are numerous 
SO2 sources in Lake County, including steel mills, an oil 
refinery, and other industrial processes, that have SO2 
limits established in 326 IAC 7-4-1.1. Because these limits were 
outdated and did not demonstrate attainment, IDEM worked with the 
affected sources to update their emission limits in the rule, and 
performed emission modeling based on these limits that demonstrates

[[Page 43822]]

attainment of the SO2 NAAQS in the Lake County area.

2. What Information Did Indiana Submit, and What Were Its Requests?

    The SIP revision submitted by IDEM on April 8, 2005, and 
supplemented on July 6, 2005, consists of amendments to rules 
previously approved as part of the Lake County SO2 SIP. In 
this submittal the State requested that we:

Amend 326 IAC 7-1.1-1 concerning applicability;
Amend 326 IAC 7-1.1-2 concerning SO2 limitations;
Amend 326 IAC 7-2-1 concerning reporting requirements and methods to 
determine compliance;
Add 326 IAC 7-4.1 concerning Lake County SO2 emission 
limitations; and,
Repeal 326 IAC 7-4-1.1.

    The June 21, 2005, submittal requests that we use parallel 
processing to redesignate the Lake County SO2 nonattainment 
area to attainment of the SO2 NAAQS and classify it as a 
maintenance area.

3. What Changes Did Indiana Make to the Lake County SO2 
Rules?

    The amendments to 326 IAC 7-1.1-1, 326 IAC 7-1.1-2, and 326 IAC 7-
2-1 consist of clerical corrections and updates to citations made for 
consistency.
    Section 326 IAC 7-4-1.1 is repealed and is being replaced by 326 
IAC 7-4.1 as follows:

326 IAC 7-4.1-1 Lake County SO2 emission limitations
326 IAC 7-4.1-2 Sampling and analysis protocol
326 IAC 7-4.1-3 BP Products North America Inc. SO2 emission 
limitations
326 IAC 7-4.1-4 Bucko Construction SO2 emission limitations
326 IAC 7-4.1-5 Cargill, Inc. SO2 emission limitations
326 IAC 7-4.1-6 Carmeuse Lime SO2 emission limitations
326 IAC 7-4.1-7 Cokenergy Inc. SO2 emission limitations
326 IAC 7-4.1-8 Indiana Harbor Coke Company SO2 emission 
limitations
326 IAC 7-4.1-9 Ironside Energy, LLC SO2 emission 
limitations
326 IAC 7-4.1-10 ISG Indiana Harbor Inc. SO2 emission 
limitations
326 IAC 7-4.1-11 Ispat Inland Inc. SO2 emission limitations
326 IAC 7-4.1-12 Methodist Hospital SO2 emission limitations
326 IAC 7-4.1-13 National Recovery Systems SO2 emission 
limitations
326 IAC 7-4.1-14 NIPSCO Dean H. Mitchell Generating Station 
SO2 emission limitations
326 IAC 7-4.1-15 Rhodia SO2 emission limitations
326 IAC 7-4.1-16 Safety-Kleen Oil Recovery Company SO2 
emission limitations
326 IAC 7-4.1-17 SCA Tissue North America LLC SO2 emission 
limitations
326 IAC 7-4.1-18 State Line Energy, LLC SO2 emission 
limitations
326 IAC 7-4.1-19 Unilever HPC USA SO2 emission limitations
326 IAC 7-4.1-20 U.S. Steel-Gary Works SO2 emission 
limitations
326 IAC 7-4.1-21 Walsh and Kelly SO2 emission limitations

    A. 326 IAC 7-4.1-1 Lake County SO2 emission limitations. This 
section restricts all new and existing fossil fuel-fired combustion 
sources and facilities located in Lake County to burning only natural 
gas unless an alternate SO2 emission limit is provided in 
the rule. Facilities with fuel combustion units that have a maximum 
capacity of less than twenty (20) million British thermal units (MMBtu) 
per hour actual heat input not located at a source specifically listed 
in the rule, may burn distillate oil with SO2 emissions 
limited to three-tenths (0.3) pound per MMBtu. The restriction to 
natural gas for new and existing units that are not listed in the rule 
is necessary for protection of the SO2 NAAQS.
    B. 326 IAC 7-4.1-2 Sampling and analysis protocol. This section 
requires facilities owned and/or operated by Cargill, Inc., BP Products 
North America Inc., Ispat Inland Inc., ISG Indiana Harbor Inc., 
Carmeuse Lime, and U.S. Steel-Gary Works to maintain a sampling and 
analysis protocol that specifies the frequency of sampling, analysis, 
and measurement for each fuel and material. This protocol will be 
incorporated into each facility's operating permit. The protocol may be 
revised as necessary to establish acceptable sampling, analysis, and 
measurement procedures and frequency, but the revised protocol must be 
submitted to IDEM for approval. The source may also be required to 
conduct a stack test at any facility listed in this section, subject to 
a thirty day written notification.
    C. 326 IAC 7-4.1-3 through 326 IAC 7-4.1-21. The remaining sections 
of 326 IAC 7-4.1 revise the format and style from the Table in 326 IAC 
7-4-1.1(c) for clarity and ease of future revision by placing facility-
specific requirements into the separate sections as listed above. Since 
the last time the rule was amended, certain facilities are operating 
under new permits, variances, or other agency actions, including new or 
updated information or emission limits. IDEM has updated the rule to 
reflect the current information in these documents. The changes made in 
the revised rule include the following:
    i. Emission limits in pounds per hour and operating and production 
restrictions consistent with the modeled attainment demonstration have 
been added for all facilities.
    ii. Changes to facility names have been updated as follows: BP 
Products North America Inc. (formerly AMOCO), Carmeuse Lime (formerly 
Marblehead Lime), Cerestar USA (formerly AMAIZO), ISG Indiana Harbor 
Inc. (formerly LTV Steel), Ispat Inland Inc. (formerly Inland Steel), 
National Recovery Systems (formerly National Briquette), SCA Tissue 
North America LLC (formerly Georgia Pacific), Rhodia (formerly 
Stauffer), Unilever (formerly Lever Brothers), and U.S. Steel-Gary 
Works (formerly USX).
    iii. Specific changes to emission limits have been made to be 
consistent with permitted limits or to demonstrate attainment, through 
modeling, with the SO2 NAAQS. Facilities with emission limit 
changes include: BP Products North America Inc., Carmeuse Lime, 
Cerestar USA, ISG Indiana Harbor Inc., Ispat Inland Inc., Methodist 
Hospital, Safety Kleen Oil Recovery Company, Rhodia, and U.S. Steel-
Gary Works.
    iv. New facilities that were previously part of a facility listed 
in the Table in 326 IAC 7-4-1.1 have been added. These include: Indiana 
Harbor Coke Company and Cokenergy (both affiliated with Ispat Inland 
Inc.)
    v. Closed facilities have been removed. These facilities include: 
C&A Wallcovering, East Chicago Incinerator, Kaiser, Lehigh Portland 
Cement, and U.S. Reduction.
    vi. Units that burn only natural gas and facilities with only 
natural gas units listed are subject to the natural gas emission limit 
in 326 IAC 7-4.1-1 and are no longer listed individually in the rule. 
Facilities removed from the rule for this purpose include: ASF-Keystone 
(formerly American Steel-Hammond), Ferro Corporation (formerly Keil 
Chemical), Horace Mann School, Huhtamaki Foods (formerly Keyes Fibre), 
Premiere Candy, Resco Products (formerly Harbison Walker), Silgan 
Containers Corporation (formerly American Can Company), and U.S. 
Gypsum.
    vii. Equipment inventories have been updated, either adding or 
deleting units.
    viii. Source codes for each facility have been added.
    ix. Other minor corrections and clarifications have been made, such 
as correcting unit descriptions.

[[Page 43823]]

4. What Are the Results of the Modeled Attainment Demonstration?

    The ambient impact of the SO2 sources in Lake County was 
determined using the ISCST3 regulatory dispersion model (version 02035) 
with surface meteorological data from Hammond, Indiana from 1991 
through 1995. The State ran the model with 1987 meteorological data as 
well, to show that the new SIP would be protective of the NAAQS using 
the worst-case year from the previous Lake County SO2 SIP 
demonstration. The emission inventory for the Lake County attainment 
demonstration includes all the SO2 emission points from the 
facilities subject to 326 IAC 7, and reflects an up-to-date inventory 
of the Lake County area's SO2 emissions. For some 
facilities, the State performed separate modeling runs to evaluate 
alternate operating scenarios. This ensured that the facilities could 
be more flexible in their day-to-day operations, while still protecting 
the NAAQS. Representative background SO2 concentrations were 
developed from monitored data at seven monitoring locations in Lake, 
LaPorte, and Porter Counties, and added to the final modeling results. 
The Lake County modeling demonstration, including background 
SO2 levels, showed that the 3-hour, 24-hour, and annual 
SO2 NAAQS would be protected under the current 
SO2 rules.

III. State Implementation Plan Approval

1. What Requirements Do SO2 Nonattainment Areas Have To 
Meet?

    The Part D SIP requirements for SO2 nonattainment areas 
are contained in section 172(c) of the Act, and pertain to: Reasonably 
Available Control Measures; Reasonable Further Progress; Inventory; 
Identification and Quantification; Permits for New and Modified Major 
Stationary Sources; Other Measures; Compliance with section 110(a)(2); 
Equivalent Techniques; and, Contingency Measures.

2. How Does the State's SIP Revision Meet the Requirements of the Act?

    With this submission, Indiana will have a fully approvable 
SO2 SIP. As described below, Indiana's submitted revision to 
its SO2 SIP for the Lake County nonattainment area fully 
complies with the Part D requirements as set forth in section 172(c) of 
the Act.
    A. Reasonably Available Control Measures (RACM). The plan complies 
with the requirements to implement RACM by providing for immediate 
attainment of the SO2 NAAQS through the emission limits and 
operating restrictions imposed on the relevant sources by the revised 
rules.
    B. Reasonable Further Progress. Reasonable further progress is 
achieved due to the immediate effect of the emission limits required by 
the plan.
    C. Inventory. An inventory of the SO2 emissions in the 
Lake County nonattainment area was provided by the State and has been 
found to be acceptable.
    D. Identification and Quantification. This information is 
unnecessary because the area has not been identified as a zone for 
which economic development should be targeted.
    E. Permits for New and Modified Major Stationary Sources. Any new 
or modified sources constructed in the area must comply with a state 
submitted and federally approved New Source Review (NSR) program. The 
Federal requirements for NSR in nonattainment areas are contained in 
section 172(c)(5) of the Act. EPA guidance indicates the requirements 
of the part D NSR program will be replaced by the Prevention of 
Significant Deterioration (PSD) program when an area has reached 
attainment and been redesignated, provided there are assurances that 
PSD will become fully effective upon redesignation. Indiana's PSD 
program was approved into the Indiana SIP on May 20, 2004 (69 FR 
29071). The PSD program will become fully effective in the Lake County 
area immediately upon redesignation.
    F. Other Measures. The plan provides for immediate attainment of 
the SO2 NAAQS through the emission limitations, operating 
requirements, and compliance schedules that are set forth within state 
rules.
    G. Compliance with section 110(a)(2). This submission complies with 
section 110(a)(2) of the Act, which identifies the requirements that a 
SIP shall meet. All of the applicable provisions of section 110(a)(2) 
are already required by the statutory provisions discussed in this 
plan, or they have already been met by Indiana's original SIP 
submission to EPA.
    H. Equivalent Techniques. The modeling for this SIP submittal was 
conducted using EPA's ``Guideline on Air Quality Models (Revised).'' No 
equivalent techniques were used for modeling, emission inventory, or 
planning procedures.
    I. Contingency Measures. Section 172(c)(9) of the Act defines 
contingency measures as measures in a SIP which are to be implemented 
if an area fails to make RFP or fails to attain the NAAQS by the 
applicable attainment date and shall consist of other control measures 
that are not included in the control strategy. However, the General 
Preamble to the 1990 Amendments to the Act (57 FR 13498), states that 
SO2 measures present special considerations because they are 
based upon what is necessary to attain the NAAQS. Because 
SO2 control measures are well established and understood, 
they are far less prone to uncertainty. It is considered unlikely that 
an area would fail to attain the standards after it has demonstrated, 
through modeling, that attainment is reached after the limits and 
restrictions are fully implemented and enforced. Therefore, for 
SO2 programs, contingency measures mean that the state 
agency has the ability to identify sources of violations of the 
SO2 NAAQS and to undertake an aggressive follow-up for 
compliance and enforcement. In order to respond to NAAQS violations 
IDEM will: (1) Determine whether an exceedance could be classified as 
an exceptional event; (2) evaluate available meteorological data and 
conduct modeling studies to determine which SO2 sources, if 
any, are the cause of the problem; and (3) review the operating records 
of SO2 sources to identify equipment malfunctions or permit 
or rule violations. Although the point sources listed in the State's 
inventory will be the primary focus, the study will not be limited to 
only those sources but will encompass all potential sources of 
SO2. IDEM has the necessary enforcement and compliance 
programs, as well as the means to identify violators as described 
above, thus satisfying the contingency measures requirement.

IV. Redesignation Evaluation

1. What Are the Criteria Used To Review Redesignation Requests?

    Section 107(d)(3)(E) of the Act establishes the requirements to be 
met before an area may be redesignated from nonattainment to 
attainment. Approvable redesignation requests must meet the following 
conditions: The area has attained the applicable NAAQS; the area has a 
fully approved SIP under section 110(k) of the Act; the air quality 
improvement in the area is due to permanent and enforceable emission 
reductions; the maintenance plan for the area has met all the 
requirements of section 175A of the Act; and, the state has met all the 
requirements applicable to the area under section 110 and part D of the 
Act.

2. How Are These Criteria Satisfied for Lake County?

    A. Demonstrated Attainment of the NAAQS. Indiana's June 21, 2005, 
submittal includes a table summarizing

[[Page 43824]]

ambient air monitoring data showing no exceedances of the 
SO2 NAAQS in Lake County since 1996. There are currently two 
monitors operating within the Lake County area, one in Gary and one in 
Hammond. The redesignation request is based upon air quality data 
collected and quality assured for the most recent three whole calendar 
years (2002-2004). This data indicates that the ambient air quality 
attains the annual and 24-hour health-based primary standards, and the 
3-hour secondary standard.
    Dispersion modeling is commonly used to demonstrate attainment of 
the SO2 NAAQS. The State's modeling analysis was included in 
the April 8, 2005, submittal. The modeling demonstrates that, under all 
the operating scenarios allowed for in the SIP, the SO2 
emission limits for the relevant sources in Lake County are adequate to 
show attainment and maintenance of the SO2 standards. A more 
detailed discussion of the modeling evaluation is included elsewhere in 
this notice.
    B. Fully Approved SIP. The SIP for the area must be fully approved 
under section 110(k) of the Act and must satisfy all requirements that 
apply under section 110 and part D of the Act. To satisfy these 
requirements, EPA is proposing to approve the State's April 8, 2005, 
submittal containing Lake County SO2 limits into the SIP, as 
discussed in other sections of this rulemaking. Therefore, both the SIP 
revision and the redesignation request for Lake County will comply with 
the section 110(k) and part D requirements of the Act upon final 
approval of these actions.
    EPA approval of a transportation conformity SIP revision for the 
area is not required for this redesignation because the nature of the 
area's previous SO2 nonattainment problem has been 
determined to be overwhelmingly attributable to stationary sources. The 
April 8, 2005, submittal contains a detailed emissions inventory of the 
allowable emissions for all of the major SO2 sources in the 
area. Area and mobile source SO2 emissions are insignificant 
in comparison to the emissions from stationary sources and estimated 
background concentrations used in the modeled attainment demonstration.
    C. Permanent and Enforceable Reductions in Emissions. Lake County 
was designated nonattainment of the SO2 NAAQS based on 
violations that occurred prior to 1978. Air quality improvement in the 
Lake County SO2 nonattainment area is attributed to 
SO2 emission limits and operating restrictions imposed on 
the facilities that contributed to the nonattainment status in Lake 
County. These limits are permanent and enforceable by means of non-
expiring state regulations. Emissions from these sources were modeled 
with the control measures in place. The data submitted by the State 
shows modeled attainment of the SO2 NAAQS in Lake County.
    D. Fully Approved Maintenance Plan. EPA has concluded that the 
SO2 emissions limitations contained in the plan submitted by 
the State will assure maintenance of the SO2 standards. EPA 
is proposing to approve the maintenance plan in today's action as 
discussed below.
    E. Part D and Other Section 110 Requirements. Section 
107(d)(3)(E)(v) of the Act states that the Administrator may not 
redesignate an area to attainment unless the area has met the 
applicable requirements under section 110 and Part D. As, discussed 
above, the requirements under section 110 and Part D will be met upon 
final approval of the SIP revision submitted by the State on April 8, 
2005, and supplemented on July 6, 2005.

V. Maintenance Plan

What Are the Maintenance Plan Requirements?

    Section 175A of the Act requires states to submit a SIP revision 
which provides for the maintenance of the NAAQS in the area for at 
least 10 years after approval of the redesignation. Consistent with the 
Act's requirements, EPA developed procedures for redesignation of 
nonattainment areas that are contained in a September 4, 1992, 
memorandum titled, ``Procedures for Processing Requests to Redesignate 
Areas to Attainment.'' This EPA guidance document contains a number of 
maintenance plan provisions that a State should consider before it can 
request a change in designation for a federally designated 
nonattainment area. The basic components needed to ensure proper 
maintenance of the NAAQS are: Attainment inventory, maintenance 
demonstration, ambient air monitoring network, verification of 
continued attainment, and a contingency plan.
    A. Attainment Inventory. The air dispersion modeling included in 
the State's submittal contains the emission inventory of SO2 
sources for Lake County.
    B. Maintenance Demonstration. The modeled attainment demonstration 
submitted by Indiana on April 8, 2005, shows attainment and maintenance 
of the SO2 NAAQS. Steel mills, an oil refinery, and other 
industrial processes are the primary sources of SO2 in the 
Lake County area. Permanent and enforceable reductions of 
SO2 emissions in Lake County contributed to the attainment 
of the SO2 standards. Reductions of SO2 emissions 
between the year that violations occurred (pre-1979) and the year 
attainment was achieved (2004) are attributable to the closure of 
stationary sources or emissions units, substantial emissions reductions 
at U.S. Steel-Gary Works, and reduced emission limits for certain units 
at Cargill, Ispat Inland, and Carmeuse Lime facilities. Subsequent to 
redesignation, any future increases in emissions and/or significant 
changes to the stack configuration parameters from those modeled in the 
attainment demonstration due to new or modifying stationary sources, 
would be subject to the Indiana SIP's NSR and/or PSD requirements 
including a demonstration that the NAAQS and applicable PSD increments 
are protected. Although total SO2 emissions from all sources 
are projected to increase between 2004 and 2015 due to economic growth, 
the submitted modeling results indicate future NAAQS maintenance of the 
area. Emissions in 2015 are projected to be higher than 2002 and 2003, 
however, emissions in 2001 and prior years were higher than the 
projections for 2015, and there were no exceedances of the 
SO2 NAAQS recorded in 2001. Further, the attainment modeling 
assumes a potential to emit of 120,800 tons per year of SO2. 
This therefore confirms that the projected growth in actual emissions 
to 43,568 tons of SO2 in 2015, will not cause a violation of 
the SO2 NAAQS.
    C. Monitoring Network. Indiana has indicated in the submitted 
maintenance plan that it will continue to monitor SO2 in the 
Lake County area in accordance with 40 CFR parts 53 and 58 to verify 
continued attainment with the NAAQS for SO2. The data will 
continue to be entered into the Air Quality Subsystem (AQS) of the 
Aerometric Information Retrieval System (AIRS). IDEM will consult with 
EPA Region 5 staff prior to making any changes to the existing 
monitoring network should changes be necessary in the future.
    D. Verification of Continued Attainment. Indiana has committed in 
the maintenance plan to review the monitored data annually, and to 
submit a maintenance plan update eight years after redesignation which 
will contain IDEM's plan for maintaining the SO2 NAAQS for 
10 years beyond the first 10-year period after redesignation (2015-
2025). Further, IDEM commits to maintain the control measures listed 
above after redesignation and that any changes to its rules or emission 
limits applicable to SO2 sources, as required

[[Page 43825]]

for maintenance of the SO2 standards in Lake County, will be 
submitted to EPA for approval as a SIP revision. This will include, 
where appropriate, a demonstration based on modeling that the standard 
will be maintained.
    E. Contingency Plan. Section 175A of the Act requires that the 
maintenance plan include contingency provisions to correct any 
violation of the NAAQS after redesignation of the area. These 
contingency measures are distinguished from those generally required 
for nonattainment areas under section 172(c)(9). IDEM will rely on 
ambient air monitoring data in the Lake County area to track compliance 
with the SO2 NAAQS and to determine the need to implement 
contingency measures. In the event that an exceedance of the 
SO2 NAAQS occurs, the State will expeditiously investigate 
and determine the source(s) that caused the exceedance and/or 
violation, and enforce any SIP or permit limit that is violated. If 
there is a violation of the SO2 NAAQS, and it is not due to 
an exceptional event, malfunction, or noncompliance with a permit 
condition or rule requirement, IDEM will determine additional control 
measures needed to assure future attainment of the SO2 
NAAQS. Control measures that can be implemented in a short time will be 
selected in order to be in place within eighteen (18) months from the 
time that IDEM is aware that the violation occurred. Although the point 
sources listed in the inventory will be the primary focus, the 
possibility that the problem is attributable to new or previously 
unknown SO2 sources will also be considered. Indiana will 
submit to EPA an analysis to demonstrate the proposed measures are 
adequate to return the area to attainment. Adoption of any additional 
control measures is subject to the necessary administrative and legal 
process. This process will include publication of notices, an 
opportunity for public hearing, and other measures required by Indiana 
law for rulemaking by state environmental boards.

VI. Proposed Rulemaking Action and Solicitation of Public Comment

    EPA is proposing to approve the SIP revision for the control of 
SO2 emissions in Lake County, Indiana, as requested by the 
State on April 8, 2005, and supplemented on July 6, 2005. The revision 
consists of the amended rule at 326 Indiana Administrative Code (IAC) 
Article 7. In this rule, the requirements in the Table in 326 IAC 7-4-
1.1 have been divided into separate sections for each facility for 
clarity and ease of future rule actions. The new rule, 326 IAC 7-4.1, 
replaces 326 IAC 7-4-1.1, which will be repealed. Because the State has 
complied with the requirements of section 107(d)(3)(E) of the Act, EPA 
is also proposing to approve the redesignation of the Lake County 
nonattainment area to attainment of the SO2 NAAQS, as 
requested by the State on June 21, 2005. In conjunction with these 
actions, EPA is also proposing to approve Indiana's maintenance plan 
for the Lake County SO2 nonattainment area as a SIP revision 
because it meets the requirements of section 175A of the Act.
    You may submit comments electronically, by mail, or through hand 
delivery/courier. To ensure proper receipt by EPA, identify the 
appropriate rulemaking identification number by including the text 
``Public comment on proposed rulemaking Region 5 Air Docket R05-OAR-
2005-IN-0004'' in the subject line on the first page of your comment. 
Please ensure that your comments are submitted within the specified 
comment period. Comments received after the close of the comment period 
will be marked ``late.'' EPA is not required to consider these late 
comments.

VII. Statutory and Executive Order Reviews

Executive Order 12866; Regulatory Planning and Review

    Under Executive Order 12866 (58 FR 51735, October 4, 1993), this 
action is not a ``significant regulatory action'' and therefore is not 
subject to review by the Office of Management and Budget.

Executive Order 13211: Actions That Significantly Affect Energy Supply, 
Distribution, or Use

    Because it is not a ``significant regulatory action'' under 
Executive Order 12866 or a ``significant energy action,'' this action 
is also not subject to Executive Order 13211, ``Actions Concerning 
Regulations That Significantly Affect Energy Supply, Distribution, or 
Use'' (66 FR 28355, May 22, 2001).

Regulatory Flexibility Act

    This proposed action merely proposes to approve State law as 
meeting Federal requirements and imposes no additional requirements 
beyond those imposed by State law. Accordingly, the Administrator 
certifies that this proposed rule will not have a significant economic 
impact on a substantial number of small entities under the Regulatory 
Flexibility Act (5 U.S.C. 601 et seq.).

Unfunded Mandates Reform Act

    Because this rule proposes to approve pre-existing requirements 
under State law and does not impose any additional enforceable duty 
beyond that required by State law, it 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).

Executive Order 13175 Consultation and Coordination With Indian Tribal 
Governments

    This proposed rule also does not have tribal implications because 
it will not have a substantial direct effect on one or more Indian 
tribes, on the relationship between the Federal Government and Indian 
tribes, or on the distribution of power and responsibilities between 
the Federal Government and Indian tribes, as specified by Executive 
Order 13175 (59 FR 22951, November 9, 2000).

Executive Order 13132 Federalism

    This action also does not have federalism implications because it 
does not have substantial direct effects on the States, on the 
relationship between the national government and the States, or on the 
distribution of power and responsibilities among the various levels of 
government, as specified in Executive Order 13132 (64 FR 43255, August 
10, 1999). This action merely proposes to approve a state rule 
implementing a Federal standard, and does not alter the relationship or 
the distribution of power and responsibilities established in the Clean 
Air Act.

Executive Order 13045 Protection of Children From Environmental Health 
and Safety Risks

    This proposed rule also is not subject to Executive Order 13045 
``Protection of Children from Environmental Health Risks and Safety 
Risks'' (62 FR 19885, April 23, 1997), because it is not economically 
significant.

National Technology Transfer Advancement Act

    In reviewing SIP submissions, EPA's role is to approve state 
choices, provided that they meet the criteria of the Clean Air Act. In 
this context, in the absence of a prior existing requirement for the 
State to use voluntary consensus standards (VCS), EPA has no authority 
to disapprove a SIP submission for failure to use VCS. It would thus be 
inconsistent with applicable law for EPA, when it reviews a SIP 
submission, to use VCS in place of a SIP submission that otherwise 
satisfies the provisions of the Clean Air Act. Thus, the

[[Page 43826]]

requirements of section 12(d) of the National Technology Transfer and 
Advancement Act of 1995 (15 U.S.C. 272 note) do not apply.

Paperwork Reduction Act

    This proposed rule does not impose an information collection burden 
under the provisions of the Paperwork Reduction Act of 1995 (44 U.S.C. 
3501 et seq.).

List of Subjects

40 CFR Part 52

    Environmental protection, Air pollution control, Intergovernmental 
relations, Reporting and recordkeeping requirements, Sulfur oxides.

40 CFR Part 81

    Air pollution control, National parks, Wilderness areas.

    Dated: July 21, 2005.
Bharat Mathur,
Acting Regional Administrator, Region 5.
[FR Doc. 05-15058 Filed 7-28-05; 8:45 am]
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