[Federal Register Volume 71, Number 212 (Thursday, November 2, 2006)]
[Rules and Regulations]
[Pages 64460-64465]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E6-18423]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[R08-WY-2006-0001; FRL-8236-2]


Approval and Promulgation of Air Quality Implementation Plans; 
Revised Format for Materials Being Incorporated by Reference for 
Wyoming

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule; notice of administrative change.

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SUMMARY: EPA is revising the format of 40 CFR part 52 for materials 
submitted by the State of Wyoming that are incorporated by reference 
(IBR) into its State Implementation Plan (SIP). The regulations 
affected by this format change have all been previously submitted by 
Wyoming and approved by EPA.

DATES: Effective Date: This action is effective November 2, 2006.

ADDRESSES: SIP materials which are incorporated by reference into 40 
CFR part 52 are available for inspection at the following locations: 
Air and Radiation Program, Environmental Protection Agency (EPA), 
Region 8, 999 18th Street, Suite 300, Denver, Colorado 80202-2466; the 
Air and Radiation Docket and Information Center, EPA Headquarters 
Library, Infoterra Room (Room Number 3334), EPA West Building, 1301 
Constitution Ave., NW., Washington, DC 20460, and the National Archives 
and Records Administration. If you wish to view Wyoming's SIP material 
being incorporated by reference in: (1) The EPA Region 8 Office, please 
contact the individual listed in the FOR FURTHER INFORMATION CONTACT 
section; or (2) in the EPA Headquarters Library, please call the Office 
of Air and Radiation (OAR) Docket/Telephone number, (202) 566-1742. For 
information on the availability of this material at NARA, call 202-741-
6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

FOR FURTHER INFORMATION CONTACT: Laurie Ostrand, EPA, Region 8, (303) 
312-6437, [email protected].

SUPPLEMENTARY INFORMATION: Throughout this document, wherever ``we'' or 
``our'' is used it means the EPA.

Table of Contents

I. Change of IBR Format
    A. Description of a SIP
    B. How EPA Enforces the SIP
    C. How the State and EPA Update the SIP
    D. How EPA Compiles the SIP
    E. How EPA Organizes the SIP Compilation
    F. Where You Can Find a Copy of the SIP Compilation
    G. The Format of the New Identification of Plan Section
    H. When a SIP Revision Becomes Federally Enforceable
    I. The Historical Record of SIP Revision Approvals
II. What EPA Is Doing in This Action
III. Good Cause Exemption
IV. Statutory and Executive Order Review

I. Change of IBR Format

    This format revision will affect the ``Identification of plan'' 
section of 40 CFR part 52, as well as the format of the SIP materials 
that will be available for public inspection at the National Archives 
and Records Administration (NARA); the Air and Radiation Docket and 
Information Center located at EPA Headquarters in Washington, DC; and 
the EPA Region 8 Office.

A. Description of a SIP

    Each state has a SIP containing the control measures and strategies 
used to attain and maintain the national ambient air quality standards 
(NAAQS) and achieve certain other Clean Air Act (Act) requirements 
(e.g., visibility requirements, prevention of significant 
deterioration). The SIP is extensive, containing such elements as air 
pollution control regulations, emission inventories, monitoring network 
descriptions, attainment demonstrations, and enforcement mechanisms.

B. How EPA Enforces the SIP

    Each SIP revision submitted by Wyoming must be adopted at the state 
level after undergoing reasonable notice and public hearing. SIPs 
submitted to EPA to attain or maintain the NAAQS must include 
enforceable emission limitations and other control measures, schedules 
and timetables for compliance.
    EPA evaluates submitted SIPs to determine if they meet the Act's 
requirements. If a SIP meets the Act's requirements, EPA will approve 
the SIP. EPA's notice of approval is published in the Federal Register 
and the approval is then codified in the Code of Federal Regulations 
(CFR) at 40 CFR part 52. Once EPA approves a SIP, it is enforceable by 
EPA and citizens in Federal district court.
    EPA does not reproduce in 40 CFR part 52 the full text of the 
Wyoming regulations that we have approved; instead, we incorporate them 
by reference (``IBR''). EPA approves a given state regulation with a 
specific effective date and then refer the public to the location(s) of 
the full text version of the

[[Page 64461]]

state regulation(s) should they want to know which measures are 
contained in a given SIP (see ``I.F. Where You Can Find a Copy of the 
SIP Compilation'').

C. How the State and EPA Update the SIP

    The SIP is a living document which the state can revise as 
necessary to address the unique air pollution problems in the state. 
Therefore, EPA from time to time must take action on SIP revisions 
containing new and/or revised regulations.
    On May 22, 1997 (62 FR 27968), we announced revised procedures for 
incorporating by reference Federally approved SIPs. The procedures 
announced included: (1) A new process for incorporating by reference 
material submitted by states into compilations and a process for 
updating those compilations on roughly an annual basis; (2) a revised 
mechanism for announcing EPA approval of revisions to an applicable SIP 
and updating both the compilations and the CFR; and (3) a revised 
format for the ``Identification of plan'' sections for each applicable 
subpart to reflect these revised IBR procedures.

D. How EPA Compiles the SIP

    EPA organized into a compilation the federally-approved 
regulations, source-specific requirements and nonregulatory provisions 
we have approved into the SIP. We maintain hard copies of the 
compilation in binders and we primarily update these binders on an 
annual basis.

E. How EPA Organizes the SIP Compilation

    Each compilation contains three parts. Part one contains the state 
regulations, part two contains the source-specific requirements that 
have been approved as part of the SIP (if any), and part three contains 
nonregulatory provisions that we have approved. Each compilation 
contains a table of identifying information for each regulation, each 
source-specific requirement, and each nonregulatory provision. The 
state effective dates in the tables indicate the date of the most 
recent revision to a particular regulation. The table of identifying 
information in the compilation corresponds to the table of contents 
published in 40 CFR part 52 for the state. The EPA Regional Offices 
have the primary responsibility for ensuring accuracy and updating the 
compilations.

F. Where You Can Find a Copy of the SIP Compilation

    EPA Region 8 developed and will maintain the compilation for 
Wyoming. A hard copy of the regulatory and source-specific portions of 
the compilation will also be maintained at the Air and Radiation Docket 
and Information Center, EPA Headquarters Library, Infoterra Room (Room 
Number 3334), EPA West Building, 1301 Constitution Ave., NW., 
Washington, DC 20460, and the National Archives and Records 
Administration. If you wish to view the SIP compilation in the EPA 
Region 8 Offices, please contact the individual listed in the FOR 
FURTHER INFORMATION CONTACT section. If you wish to view the regulatory 
and source specific portions of the SIP compilation in the EPA 
Headquarters Library, please call the Office of Air and Radiation (OAR) 
Docket/Telephone number: (202) 566-1742. For information on the 
availability of this material at NARA, call 202-741-6030, or go to: 
http://www.archives.gov/federal-register/cfr/ibr-locations.html. Copies 
of the Wyoming regulations we have approved are also available on the 
following Web page: http://www.epa.gov/region8/air/sip.html.

G. The Format of the New Identification of Plan Section

    In order to better serve the public, EPA has revised the 
organization of the ``Identification of plan'' section in 40 CFR part 
52 and included additional information to clarify the elements of the 
SIP.
    The revised Identification of plan section for Wyoming contains 
five subsections:
    1. Purpose and scope (see 40 CFR 52.2620(a));
    2. Incorporation by reference (see 40 CFR 52.2620(b));
    3. EPA-approved regulations (see 40 CFR 52.2620(c));
    4. EPA-approved source-specific requirements (see 40 CFR 
52.2620(d)); and
    5. EPA-approved nonregulatory provisions such as transportation 
control measures, statutory provisions, control strategies, monitoring 
networks, etc. (see 40 CFR 52.2620(e)).

H. When a SIP Revision Becomes Federally Enforceable

    All revisions to the applicable SIP are Federally enforceable as of 
the effective date of EPA's approval of the respective revisions. In 
general, SIP revisions become effective 30 to 60 days after publication 
of EPA's SIP approval action in the Federal Register. In specific 
cases, a SIP revision action may become effective less than 30 days or 
greater than 60 days after the Federal Register publication date. In 
order to determine the effective date of EPA's approval for a specific 
Wyoming SIP provision that is listed in paragraph 40 CFR 52.2620 (c), 
(d), or (e), consult the volume and page of the Federal Register cited 
in the ``EPA approval date'' column of 40 CFR 52.2620 for that 
particular provision.

I. The Historical Record of SIP Revision Approvals

    To facilitate enforcement of previously approved SIP provisions and 
to provide a smooth transition to the new SIP processing system, we are 
retaining the original Identification of plan section (see 40 CFR 
52.2635). This section previously appeared at 40 CFR 52.2620. After an 
initial two-year period, EPA will review our experience with the new 
table format and will decide whether or not to retain the original 
Identification of plan section (40 CFR 52.2635) for some further 
period.

II. What EPA Is Doing in This Action

    Today's action constitutes a ``housekeeping'' exercise to reformat 
the codification of the EPA-approved Wyoming SIP.

III. Good Cause Exemption

    EPA has determined that today's action falls under the ``good 
cause'' exemption in section 553(b)(3)(B) of the Administrative 
Procedure Act (APA) which, upon a finding of ``good cause,'' authorizes 
agencies to dispense with public participation, and section 553(d)(3), 
which allows an agency to make a rule effective immediately (thereby 
avoiding the 30-day delayed effective date otherwise provided for in 
the APA). Today's action simply reformats the codification of 
provisions which are already in effect as a matter of law.
    Under section 553 of the APA, an agency may find good cause where 
procedures are ``impractical, unnecessary, or contrary to the public 
interest.'' Public comment is ``unnecessary'' and ``contrary to the 
public interest'' since the codification only reflects existing law. 
Likewise, there is no purpose served by delaying the effective date of 
this action.

IV. Statutory and Executive Order Review

A. General Requirements

    Under Executive Order 12866 (58 FR 51735, October 4, 1993), this 
action is not a ``significant regulatory action'' and

[[Page 64462]]

is therefore not subject to review by the Office of Management and 
Budget. This rule is not subject to Executive Order 13211, ``Actions 
Concerning Regulations That Significantly Affect Energy Supply, 
Distribution, or Use'' (66 FR 28355, May 22, 2001) because it is not a 
significant regulatory action under Executive Order 12866. Because the 
agency has made a ``good cause'' finding that this action is not 
subject to notice-and-comment requirements under the Administrative 
Procedure Act or any other statute as indicated in the Supplementary 
Information section above, it is not subject to the regulatory 
flexibility provisions of the Regulatory Flexibility Act (5 U.S.C 601 
et seq.), or to sections 202 and 205 of the Unfunded Mandates Reform 
Act of 1995 (UMRA) (Pub. L. 104-4). In addition, this action does not 
significantly or uniquely affect small governments or impose a 
significant intergovernmental mandate, as described in sections 203 and 
204 of UMRA. This rule also does 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), nor 
will it 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 rule also is not subject to Executive Order 13045 (62 
FR 19885, April 23, 1997), because it is not economically significant. 
This rule does not involve technical standards; 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. The rule also does not 
involve special consideration of environmental justice related issues 
as required by Executive Order 12898 (59 FR 7629, February 16, 1994). 
In issuing this rule, EPA has taken the necessary steps to eliminate 
drafting errors and ambiguity, minimize potential litigation, and 
provide a clear legal standard for affected conduct, as required by 
section 3 of Executive Order 12988 (61 FR 4729, February 7, 1996). EPA 
has complied with Executive Order 12630 (53 FR 8859, March 15, 1998) by 
examining the takings implications of the rule in accordance with the 
``Attorney General's Supplemental Guidelines for the Evaluation of Risk 
and Avoidance of Unanticipated Takings'' issued under the executive 
order. This rule does not impose an information collection burden under 
the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et seq.). EPA's 
compliance with these statutes and Executive Orders for the underlying 
rules are discussed in previous actions taken on the State's rules.

B. Submission to Congress and the Comptroller General

    The Congressional Review Act (5 U.S.C. 801 et seq.), as added by 
the Small Business Regulatory Enforcement Fairness Act of 1996, 
generally provides that before a rule may take effect, the agency 
promulgating the rule must submit a rule report, which includes a copy 
of the rule, to each House of the Congress and to the Comptroller 
General of the United States. Section 808 allows the issuing agency to 
make a rule effective sooner than otherwise provided by the CRA if the 
agency makes a good cause finding that notice and public procedure is 
impracticable, unnecessary or contrary to the public interest. Today's 
action simply reformats the codification of provisions which are 
already in effect as a matter of law. 5 U.S.C. 808(2). As stated 
previously, EPA has made such a good cause finding, including the 
reasons therefore, and established an effective date of November 2, 
2006. EPA will submit a report containing this rule and other required 
information to the U.S. Senate, the U.S. House of Representatives, and 
the Comptroller General of the United States prior to publication of 
the rule in the Federal Register. These corrections to the 
Identification of plan for Wyoming are not a ``major rule'' as defined 
by 5 U.S.C. 804(2).

C. Petitions for Judicial Review

    EPA has also determined that the provisions of section 307(b)(1) of 
the Clean Air Act pertaining to petitions for judicial review are not 
applicable to this action. Prior EPA rulemaking actions for each 
individual component of the Wyoming SIP compilation had previously 
afforded interested parties the opportunity to file a petition for 
judicial review in the United States Court of Appeals for the 
appropriate circuit within 60 days of such rulemaking action. Thus, EPA 
sees no need to reopen the 60-day period for filing such petitions for 
judicial review for this reorganization of the Wyoming ``Identification 
of plan'' section of 40 CFR 52.2620.

List of Subjects in 40 CFR Part 52

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

    Dated: October 20, 2006.
Kerrigan G. Clough,
Acting Regional Administrator, Region 8.


0
Part 52 of chapter I, title 40, Code of Federal Regulations, is amended 
as follows:

PART 52--[AMENDED]

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

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

Subpart ZZ--Wyoming

0
2. Section 52.2620 is redesignated as Sec.  52.2635. The section 
heading and paragraph (a) are revised to read as follows:


Sec.  52.2635  Original identification of plan section.

    (a) This section identifies the original ``Air Implementation Plan 
for the State of Wyoming'' and all revisions submitted by Wyoming that 
were federally approved prior to August 31, 2006.
* * * * *

0
3. A new Sec.  52.2620 is added to read as follows:


Sec.  52.2620  Identification of plan.

    (a) Purpose and scope. This section sets forth the applicable State 
Implementation Plan for Wyoming under section 110 of the Clean Air Act, 
42 U.S.C. 7410 and 40 CFR part 51 to meet national ambient air quality 
standards or other requirements under the Clean Air Act.
    (b) Incorporation by reference. (1) Material listed in paragraphs 
(c) and (d) of this section with an EPA approval date prior to August 
31, 2006 was approved for incorporation by reference by the Director of 
the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 
51. Material is incorporated as submitted by the state to EPA, and 
notice of any change in the material will be published in the Federal 
Register. Entries for paragraphs (c) and (d) of this section with EPA 
approval dates after August 31, 2006, will be incorporated by reference 
in the next update to the SIP compilation.
    (2) EPA Region 8 certifies that the rules/regulations provided by 
EPA in

[[Page 64463]]

the SIP compilation at the addresses in paragraph (b)(3) of this 
section are an exact duplicate of the officially promulgated state 
rules/regulations which have been approved as part of the State 
Implementation Plan as of August 31, 2006.
    (3) Copies of the materials incorporated by reference may be 
inspected at the Environmental Protection Agency, Region 8, 999 18th 
Street, Suite 300, Denver, Colorado, 80202-2466; the Air and Radiation 
Docket and Information Center, EPA West Building, 1301 Constitution 
Ave., NW., Washington, DC 20460, and the National Archives and Records 
Administration. For information on the availability of this material at 
NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.
    (c) EPA approved regulations.
    (1) State of Wyoming Regulations

--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                    EPA approval date and citation
          State citation                  Title/subject        State adopted and  effective date                 \1\                     Explanations
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 1
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Authority...............   9/13/99, 10/29/99................  7/28/04, 69 FR 44965.
Section 3.........................  Definitions.............  9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
Section 4.........................  Diluting and concealing   9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     emissions.
Section 5.........................  Abnormal conditions and   9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     equipment.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 2
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Ambient standards for     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     particulate matter.
Section 3.........................  Ambient standards for     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     nitrogen oxides.
Section 4.........................  Ambient standards for     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     sulfur oxides.
Section 5.........................  Ambient standards for     9/13/99, 10/29/00.................  7/28/04, 69 FR 44965.
                                     carbon monoxide.
Section 6.........................  Ambient standards for     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     ozone.
Section 8.........................  Ambient standards for     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     suspended sulfates.
Section 10........................  Ambient standards for     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     lead.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 3
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Emission standards for    9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     particulate matter.
Section 3.........................  Emission standards for    9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     nitrogen oxides.
Section 4.........................  Emission standards for    9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     sulfur oxides.
Section 5.........................  Emission standards for    9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     carbon monoxide.
Section 6.........................  Emission standards for    9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     volatile organic
                                     compounds.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 4
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Existing sulfuric acid    9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     production units.
Section 3.........................  Existing nitric acid      9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     manufacturing plants.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 6
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Permit requirements for   9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     construction,
                                     modification, and
                                     operation.
Section 4.........................  Prevention of             9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     significant
                                     deterioration.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 7
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Continuous monitoring     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     requirements for
                                     existing sources.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 8
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Sweetwater County         9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     particulate matter
                                     regulations.
Section 3.........................  Conformity of general     9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     federal actions to
                                     state implementation
                                     plans.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Chapter 9
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Visibility..............  9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                       Chapter 10
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Open burning              9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     restrictions.
Section 3.........................  Wood waste burners......  9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                       Chapter 12
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Air pollution emergency   9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     episodes.
--------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 64464]]

 
                                                                       Chapter 13
--------------------------------------------------------------------------------------------------------------------------------------------------------
Section 2.........................  Motor vehicle pollution   9/13/99, 10/29/99.................  7/28/04, 69 FR 44965.
                                     control.
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ In order to determine the EPA effective date for a specific provision that is listed in this table, consult the Federal Register cited in this
  column for that particular provision.

    (d) EPA-approved source-specific requirements.

--------------------------------------------------------------------------------------------------------------------------------------------------------
         Name of source             Nature of requirement   State submittal and effective date  EPA approval date and citation \2\      Explanations
--------------------------------------------------------------------------------------------------------------------------------------------------------
FMC Corporation.................  Order containing          1/25/79, 4/25/79..................  7/2/79, 44 FR 38473...............
                                   schedule for
                                   compliance, interim
                                   requirements, and
                                   monitoring and
                                   reporting requirements.
Black Hills Power and Light.....  Order containing          1/25/79, 4/25/79..................  7/2/79, 44 FR 38473...............
                                   schedule for
                                   compliance, interim
                                   requirements, and
                                   monitoring and
                                   reporting requirements.
--------------------------------------------------------------------------------------------------------------------------------------------------------
\2\ In order to determine the EPA effective date for a specific provision that is listed in this table, consult the Federal Register cited in this
  column for that particular provision.

    (e) EPA-approved nonregulatory provisions.

----------------------------------------------------------------------------------------------------------------
                                      Applicable
    Name of nonregulatory SIP     geographic or non-    State submittal    EPA approval date     Explanations
            provision               attainment area    date/adopted date   and citation \3\
----------------------------------------------------------------------------------------------------------------
I. Implementation Plan for the    Statewide.........  Submitted: 1/28/    5/31/72, 37 FR      Excluding: (1) the
 State of Wyoming                                      72, Adopted: 1/22/  10842.              Wyoming Air
I. Introduction.................                       72, Additional                          Quality Act of
II. Legal Authority.............                       letters submitted                       1967 and Wyoming
III. Control Strategy...........                       on 3/28/72 and 5/                       Air Quality
IV. Compliance Schedule.........                       3/72.                                   Standards and
V. Emergency Plan...............                                                               Regulations
VI. Air Quality Surveillance....                                                               contained in
VII. Review of New Sources and                                                                 Appendix E (more
 Modifications.                                                                                recent versions
VIII. Source Surveillance.......                                                               of these
IX. Resources...................                                                               documents have
X. Intergovernmental Cooperation                                                               been approved in
IX. Reports and Revisions.......                                                               the SIP); (2)
Appendices......................                                                               Section III,
                                                                                               paragraph
                                                                                               following table I
                                                                                               and Section IV,
                                                                                               paragraph G
                                                                                               (revisions to
                                                                                               these paragraphs
                                                                                               have subsequently
                                                                                               been approved).
                                                                                               (See II below.)
II. Revisions to Sections III     Statewide.........  Submitted: 5/29/73  7/3/74, 39 FR
 (paragraph following Table I                                              24504.
 and IV (paragraph G) of the SIP
III. Inclusion of the Wyoming     Statewide.........  Submitted: 2/19/76  8/31/76, 41 FR
 Environmental Quality Act,                                                36652.
 1973, with amendments
 incorporated by the 1975
 Wyoming State Legislature
IV. Revisions to Implementation   Statewide.........  Submitted: 1/25/79  7/2/79, 44 FR
 Plan for Air Quality Control                                              38473.
 Plan State of Wyoming: addition
 of sections for Implementation
 Plan Reviews: Added to Air
 Quality Surveillance Chapter--
 Public Notification of Air
 Quality; and added to
 Intergovernmental Cooperation
 Chapter--Consultation
V. SIP for Total Suspended        Trona area of       Submitted: 1/25/79  7/2/79, 44 FR       SIP also contained
 Particulate (TSP) Trona Area of   Sweetwater County.                      38473.              source specific
 Sweetwater County nonattainment                                                               regulations that
 area                                                                                          are now in
                                                                                               Chapter 8,
                                                                                               Section 2.

[[Page 64465]]

 
VI. Revision to Implementation    Statewide.........  4/30/91...........  4/19/83, 48 FR
 Plan for Air Quality Control                                              16682.
 Plan State of Wyoming: Addition
 of section to Control Strategy
 Chapter for Implementation Plan
 Reviews
VII. SIP to meet Air Quality      Statewide.........  Submitted: 8/26/81  2/9/82, 47 FR 5892
 Monitoring 40 CFR part 58
VIII. Emergency Episode           Statewide.........  Submitted: 8/26/81  2/9/82, 47 FR 5892
 Contingency Plan
IX. Implementation Plan for Lead  Statewide.........  Submitted: 8/30/84  10/11/84, 49 FR
                                                                           39843.
X. Implementation Plan for Class  Statewide.........  Submitted: 9/6/88.  2/15/89, 54 FR
 I Visibility Protection                                                   6912.
XI. Commitment to conduct stack   Statewide.........  Submitted: 12/9/88  3/17/89, 54 FR
 height evaluations in                                                     11186.
 accordance with the ``Guideline
 for Determination of Good
 Engineering Practice Stack
 Height (Technical Support
 Document for the Stack Height
 Regulations),'' EPA 450/4-80-
 023R, June, 1985.
XII. Stack Height Demonstration   Statewide.........  Submitted: 8/5/86.  6/7/89, 54 FR
 Analyses                                                                  24334.
XIII. Implementation Plan on Air  Statewide.........  Submitted: 3/14/    7/10/89 55 FR
 Quality Surveillance for                              89, Adopted: 12/    28197.
 Inhalable Particulate Matter                          13/88.
 (PM10)
XIV. NOX Increment                Statewide.........  Submitted: 11/20/   5/24/91, 56 FR
 Implementation                                        90.                 23811.
XV. Small Business Program        Statewide.........  Submitted: 11/1/93  6/20/94, 59 FR
                                                                           31548.
XVI. Implementation Plan for PM-  Sheridan..........  Submitted: 8/28/    6/23/94, 59 FR      Approval does not
 10 Control Strategies Sheridan,                       89, Adopted: 7/17/  32360.              include sections
 Wyoming (includes City of                             89.                                     2 and 3,
 Sheridan--Air Quality                                                                         Voluntary
 Maintenance Plan)                                                                             Curtailment of
                                                                                               Solid Fuel
                                                                                               Combustion and
                                                                                               Industrial
                                                                                               Sources.
XVII. Memorandum of Agreement on  Powder River Basin  Signed: 12/22/93..  9/12/95, 60 FR
 Procedures for Protecting PM10                                            47290 .
 NAAQS in the Powder River Basin
----------------------------------------------------------------------------------------------------------------
\3\ In order to determine the EPA effective date for a specific provision that is listed in this table, consult
  the Federal Register cited in this column for that particular provision.

 [FR Doc. E6-18423 Filed 11-1-06, 8:45 am]
BILLING CODE 6560-50-P