[Federal Register Volume 71, Number 56 (Thursday, March 23, 2006)]
[Proposed Rules]
[Pages 14658-14662]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-4199]


-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R04-OAR-2005-MS-0001-200606; FRL-8048-9]


Approval and Promulgation of Implementation Plans; Mississippi 
Prevention of Significant Deterioration and New Source Review

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

-----------------------------------------------------------------------

SUMMARY: EPA is proposing to approve revisions to the Mississippi State 
Implementation Plan (SIP) to include changes made to Mississippi 
regulations entitled, ``Permit Regulations for the Construction and 
Operation of Air Emissions Equipment'' and ``Regulations for the 
Prevention of Significant Deterioration of Air Quality.'' The proposed 
revisions amend the State permitting rules in order to address changes 
to the federal New Source Review (NSR) regulations, which were 
promulgated by EPA on December 31, 2002 (67 FR 80186) and reconsidered 
with minor changes on November 7, 2003 (68 FR 63021) (collectively, 
these two final actions are called the ``2002 NSR Reform Rules''). 
EPA's 2002 NSR Reform Rules, proposed for inclusion in the Mississippi 
SIP, contain provisions for baseline emissions calculations, an actual-
to-projected-actual methodology for calculating emissions changes, 
options for plant-wide applicability limits, and recordkeeping and 
reporting requirements. The proposed revisions also include changes 
made to the NSR program for minor stationary sources, including a new 
provision allowing construction to commence on certain minor sources 
prior to the applicant receiving a final permit to construct.

DATES: Comments must be received on or before April 24, 2006.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R04-
OAR-2005-MS-0001, by one of the following methods:
    1. http://www.regulations.gov: Follow the on-line instructions for 
submitting comments.
    2. E-mail: [email protected].
    3. Fax: 404-562-9019.
    4. Mail: (Docket ID No. EPA-R04-OAR-2005-MS-0001), Air Planning 
Branch, Air, Pesticides and Toxics Management Division, U.S. 
Environmental Protection Agency, Region 4, 61 Forsyth Street, SW., 
Atlanta, Georgia 30303-8960.
    5. Hand Delivery: Deliver your comments to: Ms. Kelly Fortin, Air 
Planning Branch, Air, Pesticides and Toxics Management Division, U.S. 
Environmental Protection Agency, Region 4, 61 Forsyth Street, SW., 
Atlanta, Georgia 30303-8960. 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 to 4:30, 
excluding Federal holidays.
    Instructions: Direct your comments to Docket ID No. EPA-R04-OAR-
2005-0001. EPA's policy is that all comments received will be included 
in the public docket without change and may be made available online at 
http://www.regulations.gov, 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 http://www.regulations.gov or e-mail. The http://www.regulations.gov Web site 
is an ``anonymous access'' system, 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 http://www.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. For additional information about EPA's public 
docket, visit the EPA Docket Center homepage at http://www.epa.gov.epahome/dockets.htm.
    Docket: All documents in the docket are listed in the http://www.regulations.gov index. Although listed in the index, some 
information is not publicly available, e.g., CBI or other information 
whose disclosure is restricted by statute. Certain other material, such 
as copyrighted material, will be publicly available only in hard copy. 
Publicly available docket materials are available either electronically 
at http://

[[Page 14659]]

www.regulations.gov or in hard copy at the Regulatory Development 
Section, Air Planning Branch, Air, Pesticides and Toxics Management 
Division, U.S. Environmental Protection Agency, Region 4, 61 Forsyth 
Street, SW., Atlanta, Georgia 30303-8960. EPA requests that if at all 
possible, you contact the person listed in the FOR FURTHER INFORMATION 
CONTACT section to schedule your inspection. The Regional Office's 
official business hours are Monday through Friday, 8:30 to 4:30, 
excluding federal holidays.

FOR FURTHER INFORMATION CONTACT: For information regarding the 
Mississippi SIP, contact Ms. Nacosta Ward, Regulatory Development 
Section, Air Planning Branch, Air, Pesticides and Toxics Management 
Division, U.S. Environmental Protection Agency Region 4, 61 Forsyth 
Street, SW., Atlanta, Georgia 30303-8960. Telephone number: (404) 562-
9140; e-mail address: [email protected]. For information regarding 
New Source Review, contact Ms. Kelly Fortin, Air Permits Section, at 
the same address above. Telephone number: (404) 562-9117; e-mail 
address: [email protected].

SUPPLEMENTARY INFORMATION: Throughout this document, references to 
``EPA,'' ``we,'' ``us,'' or ``our,'' are intended to mean the U.S. 
Environmental Protection Agency. The supplementary information is 
arranged as follows:

I. What Action Is EPA Proposing to Take?
II. What Is the Background for This Action?
III. What Is EPA's Analysis of Mississippi's NSR Rule Revisions?
    A. Requirements for the Prevention of Significant Deterioration 
of Air Quality
    B. General Permitting Requirements
IV. What Action Is EPA Taking Today?
V. Statutory and Executive Order Reviews

I. What Action Is EPA Proposing to Take?

    On August 10, 2005, the State of Mississippi, through the 
Mississippi Department of Environmental Quality (MDEQ), submitted 
revisions to the Mississippi State Implementation Plan (SIP). The SIP 
submittal consists of revisions to the Mississippi Administrative Code 
(MAC) regarding Regulations for the Prevention, Abatement, and Control 
of Air Contaminants. Specifically, the proposed SIP revisions include 
changes to MDEQ regulations entitled, ``Permit Regulations for the 
Construction and Operation of Air Emissions Equipment,'' Air Pollution 
Control Section 2 (APC-S-2), found at MAC 08-034-002, and ``Regulations 
for the Prevention of Significant Deterioration of Air Quality,'' Air 
Pollution Control Section 5 (APC-S-5), found at MAC 08-034-005. MDEQ 
submitted its revision to APC-S-5 in response to EPA's December 31, 
2002, revisions to the federal NSR program. EPA is proposing to approve 
the submitted SIP revisions to APC-S-2 and APC-S-5.

II. What Is the Background for This Action?

    On December 31, 2002, EPA published final rule changes to 40 Code 
of Federal Regulations (CFR) parts 51 and 52, regarding the Clean Air 
Act's Prevention of Significant Deterioration (PSD) and Nonattainment 
New Source Review (NNSR) programs. 67 FR 80186. On November 7, 2003, 
EPA published a notice of final action on the reconsideration of the 
December 31, 2002, final rule changes. 68 FR 63021. In that November 
7th final action, EPA added the definition of ``replacement unit,'' and 
clarified an issue regarding plant-wide applicability limitations 
(PALs). The December 31, 2002, and the November 7, 2003, final actions, 
are collectively referred to as the ``2002 NSR Reform Rules.'' The 
purpose of today's action is to propose to approve the SIP submittal 
from the State of Mississippi, which includes the provisions of EPA's 
2002 NSR Reform Rules, and a change to Mississippi's minor source NSR 
program.
    The 2002 NSR Reform Rules are part of EPA's implementation of parts 
C and D of title I of the Clean Air Act (CAA or Act), 42 U.S.C. 7470-
7515. Part C of title I of the CAA, 42 U.S.C. 7470-7492, is the PSD 
program, which applies in areas that meet the National Ambient Air 
Quality Standards (NAAQS)--``attainment'' areas--as well as in areas 
for which there is insufficient information to determine whether the 
area meets the NAAQS--``unclassifiable'' areas. Part D of title I of 
the CAA, 42 U.S.C. 7501-7515, is the NNSR program, which applies in 
areas that are not in attainment of the NAAQS--``nonattainment'' areas. 
Collectively, the PSD and NNSR programs are referred to as the ``New 
Source Review'' or NSR programs. EPA regulations implementing these 
programs are contained in 40 CFR 51.165, 51.166, 52.21, 52.24, and part 
51, appendix S.
    The CAA's NSR programs are preconstruction review and permitting 
programs applicable to new and modified stationary sources of air 
pollutants regulated under the CAA. The NSR programs of the CAA include 
a combination of air quality planning and air pollution control 
technology program requirements. Briefly, section 109 of the CAA, 42 
U.S.C. 7409, requires EPA to promulgate primary NAAQS to protect public 
health and secondary NAAQS to protect public welfare. Once EPA sets 
those standards, states must develop, adopt, and submit to EPA for 
approval, a SIP that contains emissions limitations and other control 
measures to attain and maintain the NAAQS. Each SIP is required to 
contain a preconstruction review program for the construction and 
modification of any stationary source of air pollution to ensure that 
the NAAQS are achieved and maintained, to protect areas of clean air, 
to protect air quality related values (such as visibility) in national 
parks and other areas, to ensure that appropriate emissions controls 
are applied, to maximize opportunities for economic development 
consistent with the preservation of clean air resources, and to ensure 
that any decision to increase air pollution is made only after full 
public consideration of the consequences of the decision.
    The 2002 NSR Reform Rules made changes to five areas of the NSR 
programs. In summary, the 2002 NSR Reform Rules: (1) Provide a new 
method for determining baseline actual emissions; (2) adopt an actual-
to-projected-actual methodology for determining whether a major 
modification has occurred; (3) allow major stationary sources to comply 
with PALs to avoid having a significant emissions increase that 
triggers the requirements of the major NSR program; (4) provide a new 
applicability provision for emissions units that are designated clean 
units; and (5) exclude pollution control projects (PCPs) from the 
definition of ``physical change or change in the method of operation.'' 
On November 7, 2003, EPA published a notice of final action on its 
reconsideration of the 2002 NSR Reform Rules (68 FR 63021), which added 
a definition for ``replacement unit'' and clarified an issue regarding 
PALs. For additional information on the 2002 NSR Reform Rules, see 67 
FR 80186 (December 31, 2002), and http://www.epa.gov/nsr.
    After the 2002 NSR Reform Rules were finalized and effective (March 
3, 2003), industry, state, and environmental petitioners challenged 
numerous aspects of the 2002 NSR Reform Rules, along with portions of 
EPA's 1980 NSR Rules (45 FR 52676, August 7, 1980). On June 24, 2005, 
the U.S. Court of Appeals for the District of Columbia Circuit (D.C. 
Circuit Court) issued a decision on the challenges to the 2002 NSR 
Reform Rules. New York v. United States, 413 F.3d 3 (D.C. Cir. 2005). 
In summary, the D.C. Circuit

[[Page 14660]]

Court vacated portions of the rules pertaining to clean units and PCPs, 
remanded a portion of the rules regarding recordkeeping, e.g. 40 CFR 
52.21(r)(6) and 40 CFR 51.166(r)(6), and either upheld or did not 
comment on the other provisions included as part of the 2002 NSR Reform 
Rules. EPA has not yet responded to the Court's remand regarding the 
recordkeeping provisions. Today's action is consistent with the 
decision of the D.C. Circuit Court because Mississippi's submittal does 
not include any portions of the 2002 NSR Reform Rules that were vacated 
as part of the June 2005, decision.
    The 2002 NSR Reform Rules require that state agencies adopt and 
submit revisions to their SIP permitting programs implementing the 
minimum program elements of the 2002 NSR Reform Rules no later than 
January 2, 2006. (Consistent with changes to 40 CFR 51.166(a)(6)(i), 
state agencies are now required to adopt and submit SIP revisions 
within 3 years after new amendments are published in the Federal 
Register.) State agencies may meet the requirements of 40 CFR part 51, 
and the 2002 NSR Reform Rules, with different but equivalent 
regulations. However, if a state decides not to implement any of the 
new applicability provisions, that state is required to demonstrate 
that its existing program is at least as stringent as the federal 
program. In adopting changes to federal law, a state may write the 
federal requirements into the state rules or the state may incorporate 
the federal rule by referencing the citation of the federal rule. As is 
discussed in greater detail below, with regard to the present revision, 
Mississippi primarily incorporated the federal rule by reference.
    On August 10, 2005, the State of Mississippi submitted a SIP 
revision for the purpose of revising the State's NSR permitting 
provisions for both major and minor stationary sources. These changes 
were made primarily to adopt EPA's 2002 NSR Reform Rules. The submittal 
also contains revisions to the State's general regulations for the 
construction and operation of sources of air pollution. These changes 
are discussed below. EPA believes the revisions contained in the 
Mississippi submittal are approvable for inclusion into the Mississippi 
SIP.

III. What Is EPA's Analysis of Mississippi's NSR Rule Revisions?

    Mississippi currently has a SIP-approved NSR program for new and 
modified stationary sources. Today, EPA is proposing to approve 
revisions to Mississippi's existing NSR program in the SIP. These 
proposed revisions were submitted to EPA on August 10, 2005, and became 
state-effective on August 27, 2005. Copies of the revised rules, as 
well as the State's Technical Support Document, can be obtained from 
the Docket, as discussed in the ``Docket'' section above. A discussion 
of the specific changes to Mississippi's rules, proposed for inclusion 
in the SIP, follows.

 A. Requirements for Prevention of Significant Deterioration of Air 
Quality

    Incorporation by reference of 40 CFR 52.21, 51.166(f), and 
51.166(q). The State of Mississippi's PSD program incorporates by 
reference the federal requirements, found at 40 CFR 52.21, into the 
State's major source PSD program, found at APC-S-5 (MAC 08-034-005). 
The original incorporation by reference was adopted on June 28, 1990, 
and amended in 1991, 1993, and 1996. The current revision to APC-S-5, 
which EPA is now proposing to approve into the SIP, incorporates by 
reference the provisions of 40 CFR 52.21, as amended and promulgated on 
July 1, 2004. In addition, the federal provisions at 40 CFR 51.166(f), 
``Exclusions from Increment Consumption,'' and 40 CFR 51.166(q), 
``Public Participation,'' are also incorporated by reference into the 
Mississippi rule. In summary, the revisions update Mississippi's 
existing incorporation by reference of the federal NSR program to 
include the 2002 NSR Reform Rules plus subsequent revisions to the 
federal program made through July 1, 2004.
    Mississippi did not adopt those sections of the federal rules that 
do not apply to state activities or are reserved for the Administrator 
of the EPA, such as the ``delegation of authority,'' and ``plan 
disapproval'' sections found in 40 CFR 52.21. The Mississippi 
incorporation by reference properly clarified the circumstances in 
which the term ``Administrator,'' found throughout the federal rules, 
was to remain Administrator, and when it was intended to refer to the 
``Mississippi Environmental Quality Board,'' instead. The Mississippi 
rule does not incorporate the portions of the federal rules that were 
recently stayed or vacated, including the clean unit provisions, the 
PCP exclusion, and the equipment replacement provision which was 
promulgated shortly after the 2002 NSR Reform Rules.
    The revised Mississippi rule includes the recordkeeping provisions 
set forth in the federal rules at 40 CFR 52.21(r)(6). However, 
Mississippi chose to exclude the phrase, ``reasonable possibility.'' 
This phrase in the federal rule limits the recordkeeping provisions to 
modifications at facilities that use the actual-to-future-actual 
methodology to calculate emissions changes and that may have a 
``reasonable possibility'' of resulting in a significant emissions 
increase. The Mississippi rule, therefore, requires all modifications 
that use the actual-to-future-actual methodology to meet the 
recordkeeping requirements. Mississippi's minor source permitting 
regulations already contain recordkeeping requirements for 
modifications, so there is limited practical effect of this difference 
in Mississippi. As noted earlier, EPA has not yet responded to the D.C. 
Circuit Court's remand of the recordkeeping provisions of EPA's 2002 
NSR Reform Rules. As a result, EPA's final decision with regard to the 
remand may require EPA to take further action on this portion of 
Mississippi's rules. At this time, however, Mississippi's recordkeeping 
provisions are at least as stringent as the federal requirements, and 
are therefore, approvable.
    The requirements included in Mississippi's PSD program are 
substantively the same as the federal provisions, due to Mississippi's 
incorporation of the federal rules by reference. EPA has, therefore, 
determined that the proposed revisions are consistent with the program 
requirements for the preparation, adoption and submittal of 
implementation plans for the Prevention of Significant Deterioration of 
Air Quality, as set forth at 40 CFR 51.166, and are approvable as part 
of the Mississippi SIP.

B. General Permitting Requirements

    Minor Source Program Rule Revisions. Mississippi's general 
permitting requirements, including permit requirements for minor 
sources, are contained in the State rule entitled, ``Permit Regulations 
for the Construction and/or Operation of Air Emissions Equipment,'' 
(APC-S-2), found at MAC 08-034-002. Today's action proposes to approve 
recent changes to this rule. EPA has reviewed the proposed revisions 
and finds them to be consistent with the requirements of EPA's 
regulations for minor NSR programs found at 40 CFR 51.160 through 
51.164.
    On May 2, 1995 (60 FR 21443), EPA approved APC-S-2 as meeting the 
criteria necessary to allow the State of Mississippi to issue federally 
enforceable state operating permits (FESOPs). The provisions in APC-S-2 
that were relied upon for the approval of the FESOP program have not 
changed with this latest revision of that rule.

[[Page 14661]]

Therefore, the FESOP program approval remains effective.
    Mississippi's minor source permit regulations do contain a new 
provision. APC-S-2, Section XV.B., entitled ``Optional Pre-Permit 
Construction,'' allows construction to commence on certain non-major 
sources and non-major modifications prior to receiving a final permit 
to construct, provided certain conditions are met. EPA approved this 
approach to minor source permitting for the State of Idaho's permit to 
construct regulations, which were approved into the Idaho SIP in 2003. 
68 FR 2217 (January 16, 2003). As discussed below, Mississippi's new 
provision is consistent with the requirements of section 110(a)(2)(C) 
of the CAA and federal regulations found at 40 CFR 51.160 through 
51.164, including 40 CFR 51.160(b), which requires states to have 
legally enforceable procedures to prevent construction or modification 
of a source if it would violate any SIP control strategies or interfere 
with attainment or maintenance of the NAAQS.
    Mississippi's Optional Pre-Permit Construction provision includes 
requirements and safeguards to ensure that no major source or major 
modification would be allowed to commence construction prior to 
receiving a final permit to construct. For example, the provision does 
not allow new major stationary sources, major modifications, medical 
waste incinerators, hazardous waste incinerators, any modification 
involving medical waste incineration or hazardous waste incineration, 
or new stationary sources or modifications requiring a case-by-case 
Maximum Achievable Control Technology determination, to commence 
construction prior to receiving a final permit to construct. 
Furthermore, no source, including minor sources, can begin actual 
construction unless the source has received approval from the State in 
the form of either a written approval described in the rule, or an 
actual permit to construct.
    Mississippi's Optional Pre-Permit Construction provision also 
includes requirements that limit its applicability to only sources that 
have sufficiently demonstrated that they will be able to comply with 
all requirements, and therefore, will receive a final permit to 
construct. These requirements include: submittal of a comprehensive 
permit application, public notice of the application for pre-permit 
construction approval, and written approval from the Permit Board 
before a source can commence construction. Additionally, the permit 
application must include the request for pre-permit construction, 
certification that construction is at the applicant's risk, 
certification that the applicant will not contest the final permit on 
the basis that construction has begun, and certification that the 
applicant will comply with any restrictions being sought to limit 
potential to emit, including applicable monitoring and recordkeeping 
requirements.
    Furthermore, the Optional Pre-Permit Construction provision 
precludes any actual operation of the new or modified source until the 
final permit to construct is issued. Regardless of the status of the 
construction, the Permit Board may deny the pre-permit construction 
approval application, or revoke an existing pre-permit construction 
approval, for any reason it deems valid, including objections from the 
public. The Mississippi Optional Pre-Permit Construction provision also 
allows a source with a valid CAA title V operating permit to 
incorporate the preconstruction modification provisions into the title 
V permit, rather than obtaining a separate permit to construct.
    Section 110(a)(2)(C) of the CAA requires that state SIPs include a 
program for regulating the construction and modification of stationary 
sources as necessary to ensure that the NAAQS are achieved. Federal 
regulations require that the SIP include a procedure to prevent the 
construction of a source or modification that would violate a SIP 
control strategy or interfere with attainment or maintenance of the 
NAAQS. As discussed above, the Mississippi Optional Pre-Permit 
Construction provision includes enforceable procedures to prevent the 
construction of any source or modification that would violate SIP 
requirements or the NAAQS. Although the Mississippi provision is 
somewhat different than traditional minor NSR programs in other states, 
the Mississippi program is consistent with the requirements of the CAA 
and EPA's regulations, and is therefore approvable as part of the SIP.

IV. What Action Is EPA Proposing To Take?

    EPA is proposing to approve revisions to the Mississippi SIP 
submitted by MDEQ on August 10, 2005. The submittal consists of 
revisions to the State ``Permit Regulations for the Construction and 
Operation of Air Emissions Equipment,'' APC-S-2, and ``Regulations for 
the Prevention of Significant Deterioration of Air Quality,'' APC-S-5.

V. Statutory and Executive Order Reviews

    Under Executive Order 12866 (58 FR 51735, October 4, 1993), this 
proposed action is not a ``significant regulatory action'' and, 
therefore, is not subject to review by the Office of Management and 
Budget. For this reason, 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). 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.). 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).
    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 (65 FR 67249, November 9, 2000). 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 CAA. 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.
    In reviewing SIP submissions, EPA's role is to approve state 
choices, provided that they meet the criteria of the CAA. In this 
context, in the absence of a prior existing requirement for the

[[Page 14662]]

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 CAA. Thus, the requirements of section 
12(d) of the National Technology Transfer and Advancement Act of 1995 
(15 U.S.C. 272 note) do not apply. 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 in 40 CFR Part 52

    Environmental protection, Air pollution control, Carbon monoxide, 
Intergovernmental relations, Lead, Nitrogen dioxide, Ozone, Particulate 
matter, Reporting and recordkeeping requirements, Sulfur oxides, 
Volatile organic compounds.

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

    Dated: March 16, 2006.
A. Stanley Meiburg,
Acting Regional Administrator, Region 4.
 [FR Doc. E6-4199 Filed 3-22-06; 8:45 am]
BILLING CODE 6560-50-P