[Federal Register Volume 59, Number 53 (Friday, March 18, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-6390]
[[Page Unknown]]
[Federal Register: March 18, 1994]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 52
[WY2-1-5111; FRL-4851-4]
Clean Air Act Proposed Approval and Promulgation of PM10
Implementation Plan for the City of Sheridan, WY
AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice of proposed rulemaking.
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SUMMARY: EPA proposes approval of the State Implementation Plan (SIP)
submitted by the State of Wyoming to achieve attainment of the National
Ambient Air Quality Standards (NAAQS) for particulate matter with an
aerodynamic diameter less than or equal to a nominal 10 micrometers
(PM10). The SIP was submitted by the State of Wyoming to satisfy
certain Federal requirements for an approvable nonattainment area
PM10 SIP for the City of Sheridan, Wyoming.
DATES: Comments on this proposed action must be received in writing by
April 18, 1994.
ADDRESSES: Comments should be addressed to: Douglas M. Skie, Chief, Air
Programs Branch, (8ART-AP), Environmental Protection Agency, Region
VIII, 999 18th Street, suite 500, Denver, Colorado 80202-2466.
Copies of the State's submittal and other information are available
for inspection during normal business hours at the following locations:
Environmental Protection Agency, Region VIII, Air Programs Branch, 999
18th Street, 6th floor, South Tower, Denver, Colorado 80202-2466; and
Air Quality Division, Department of Environmental Quality, Herschler
Building, 4th floor, 122 West 25th Street, Cheyenne, Wyoming, 82002
FOR FURTHER INFORMATION CONTACT: Sara Summers, Environmental Protection
Agency, Region VIII, Air Programs Branch, 999 18th Street, suite 500,
Denver, Colorado, 80202-2466, (303) 293-0966.
SUPPLEMENTARY INFORMATION:
I. Background
The Sheridan, Wyoming area was designated nonattainment for
PM10 and classified as moderate under sections 107(d)(4)(B) and
188(a) of the Act, upon enactment of the Clean Air Act Amendments of
1990.\1\ See 56 FR 56694 (November 6, 1991); and 40 CFR 81.351
(specifying PM10 nonattainment designation for the Sheridan area).
The air quality planning requirements for moderate PM10
nonattainment areas are set out in part D, subparts 1 and 4, of Title I
of the Act.\2\
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\1\The 1990 Amendments to the Clean Air Act made significant
changes to the Act. See Public Law No. 101-549, 104 Stat. 2399.
References herein are to the Clean Air Act, as amended (``the
Act''). The Clean Air Act is codified, as amended, in the U.S. Code
at 42 U.S.C. 7401, et seq.
\2\Subpart 1 contains provisions applicable to nonattainment
areas generally and Subpart 4 contains provisions specifically
applicable to PM10 nonattainment areas. At times, Subpart 1 and
Subpart 4 overlap or conflict. EPA has attempted to clarify the
relationship among these provisions in the ``General Preamble'' and,
as appropriate, in today's notice and supporting information.
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The EPA has issued a ``General Preamble'' describing EPA's
preliminary views on how EPA intends to review SIPs and SIP revisions
submitted under Title I of the Act, including those State submittals
containing moderate PM10 nonattainment area SIP requirements (see
generally 57 FR 13498 (April 16, 1992) and 57 FR 18070 (April 28,
1992)). Because EPA is describing its interpretations here only in
broad terms, the reader should refer to the General Preamble for a more
detailed discussion of the interpretations of Title I advanced in this
proposal and the supporting rationale. In this action on the Wyoming
moderate PM10 SIP for Sheridan, EPA is proposing to apply its
interpretations taking into consideration the specific factual issues
presented. Thus, EPA will consider any timely submitted comments before
taking final action on this proposal.
Those States containing initial moderate PM10 nonattainment
areas (those areas designated nonattainment by operation of law under
section 107(d)(4)(B) of the Act) were required to submit, among other
things, the following provisions by November 15, 1991:
1. Provisions to assure that reasonably available control measures
(RACM) (including such reductions in emissions from existing sources in
the area as may be obtained through the adoption, at a minimum, of
reasonably available control technology (RACT)) shall be implemented no
later than December 10, 1993;
2. Either a demonstration (including air quality modeling) that the
plan will provide for attainment as expeditiously as practicable but no
later than December 31, 1994 or a demonstration that attainment by that
date is impracticable;
3. Quantitative milestones which are to be achieved every 3 years
and which demonstrate reasonable further progress (RFP) toward
attainment by December 31, 1994; and
4. Provisions to assure that the control requirements applicable to
major stationary sources of PM10 also apply to major stationary
sources of PM10 precursors except where the Administrator
determines that such sources do not contribute significantly to
PM10 levels which exceed the NAAQS in the area. See sections
172(c), 188, and 189 of the Act.
Some provisions are due at a later date. States with initial
moderate PM10 nonattainment areas were required to submit a permit
program for the construction and operation of new and modified major
stationary sources of PM10 by June 30, 1992 (see section 189(a)).
Such States also must submit contingency measures by November 15, 1993
which become effective without further action by the State or EPA, upon
a determination by EPA that the area has failed to achieve RFP or to
attain the PM10 NAAQS by the applicable statutory deadline (see
section 172(c)(9) and 57 FR 13510-13512, 13543-13544).
II. This Action
Section 110(k) of the Act sets out provisions governing EPA's
review of SIP submittals (See 57 FR 13565-66). In this action, EPA is
proposing to grant approval of the Sheridan, Wyoming, PM10 SIP
because EPA believes it meets all applicable requirements of the Act
that were due on November 15, 1991. (Also note that EPA is proposing to
approve the contingency measures submitted for the area). The SIP
includes the original document submitted to EPA on August 28, 1989, and
eight subsequent submittals containing additional information. The
dates of these submittals are: October 24, 1989, November 21, 1989,
December 20, 1989, February 16, 1990, March 29, 1990, August 21, 1991,
November 8, 1991, and March 3, 1992.
A. Analysis of State Submission
1. Procedural Background
The Act requires States to observe certain procedural requirements
in developing implementation plans for submission to EPA. Section
110(a)(2) of the Act provides that each implementation plan submitted
by a State must be adopted after reasonable notice and public
hearing.\3\ Section 110(1) of the Act similarly provides that each
revision to an implementation plan submitted by a State under the Act
must be adopted by such State after reasonable notice and public
hearing.
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\3\Also Section 172(c)(7) of the Act requires that plan
provisions for nonattainment areas meet the application provisions
of section 110(a)(2).
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The EPA also must determine whether a submittal is complete and
therefore warrants further EPA review and action (see section 110(k)(1)
and 57 FR 13565). The EPA's completeness criteria for SIP submittals
are set out at 40 CFR part 51, appendix V (1992). The EPA attempts to
make completeness determinations within 60 days of receiving a
submission. However, a submittal is deemed complete by operation of law
if a completeness determination is not made by EPA six months after
receipt of the submission.
The State of Wyoming held a public hearing on July 17, 1989, to
entertain public comment on the implementation plan for the city of
Sheridan. The State provided adequate notice of public hearing; the
State requires 45 days notice. Following the public hearing, the plan
was adopted by the State, signed by the Governor on July 17, 1989, and
submitted to EPA on August 28, 1989, as a proposed attachment to the
SIP. On March 8, 1990, EPA determined that the Sheridan SIP submittal
was administratively and technically complete and proceeded to draft a
Federal Register notice proposing to approve the SIP. However, upon
enactment of the 1990 Amendments to the Act, EPA re-assessed the SIP
for conformance with the Amendments and determined that additional
information was required to comply with the new Amendments. Of the
eight submittals made subsequent to the original document, four were
received to address requirements of the new Amendments.
Following submittal of the additional information required by the
1990 Amendments, the SIP revision was reviewed by EPA to determine its
completeness, in accordance with the completeness criteria set out at
40 CFR part 51, appendix V (1992). The final submittal was received on
March 5, 1992, and a letter dated April 14, 1992, was forwarded to the
Governor indicating the completeness of the submittal and the next
steps to be taken in the review process. As noted in this action, EPA
proposes to approve the Wyoming PM10 SIP submittal for Sheridan,
and invites public comment on the action.
2. Accurate Emissions Inventory
Section 172(c)(3) of the Act requires that nonattainment plan
provisions include a comprehensive, accurate, current inventory of
actual emissions from all sources of relevant pollutants in the
nonattainment area. The emissions inventory should also include a
comprehensive, accurate, and current inventory of allowable emissions
in the area. See, for example, section 110(a)(2)(K). Because the
submission of such inventories is a necessary adjunct to an area's
attainment demonstration (or demonstration that the area cannot
practicably attain), the emissions inventories must be received with
the attainment demonstration submission (see 57 FR 13539).
Wyoming submitted an emissions inventory in 1989 for base year
1986. This base year emissions inventory was subsequently revised and
resubmitted in March 1992. The base year inventory (both versions)
identified fugitive road dust as the primary cause of nonattainment
contributing over 74.35 percent of the total emissions during the time
that the violations were recorded. Additional contributing sources
included natural gas, 0.01 percent; coal burning, 1.61 percent; wood
burning, 14.80 percent; automobile emissions, 0.51 percent; Veterans
Medical Center, 1.12 percent; Sheridan Forest Products, 0.75 percent;
Wyoming Sawmill, 2.38 percent; and Burlington Northern, 4.38 percent.
The EPA is proposing to approve the emissions inventory because it
generally appears to be accurate and comprehensive, and provides a
sufficient basis for determining the adequacy of the attainment
demonstration for this area consistent with the requirements of
sections 172(c)(3) and 110(a)(2)(K) of the Clean Air Act.\4\ For
further details see the Technical Support Document (TSD).
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\4\The EPA issued guidance on PM10 emissions inventories
prior to the enactment of the Clean Air Act Amendments in the form
of the 1987 PM10 SIP Development Guideline. We believe that
this document provides a general basis for meeting the requirements
of the revised Act.
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3. RACM (Including RACT)
As noted, the initial moderate PM10 nonattainment areas must
submit provisions to assure that RACM (including RACT) are implemented
no later than December 10, 1993 (see sections 172(c)(1) and
189(a)(1)(C)). The General Preamble contains a detailed discussion of
EPA's interpretation of the RACM (including RACT) requirement (see 57
FR 13539-13545 and 13560-13561). The EPA's interpretation of this
requirement is set out here only in broad terms.
The State should first identify available control measures
evaluating them for their reasonableness in light of the feasibility of
the controls and the attainment needs of the area. A State may reject
an available control measure if the measure is technologically
infeasible or the cost of the control is unreasonable.
Three source categories were identified as contributing to the
PM10 nonattainment problem in Sheridan. However, the SIP only
relies on one control strategy to demonstrate attainment, the Sanding
Winter Maintenance Program (SWMP), which was adopted on July 17, 1989.
This plan, developed by the Sheridan Air Quality Committee, designates
streets to be sanded during the winter season. Included are major
streets, hills, school zones, and dangerous intersections. The plan
specifies a material application rate which has been determined to
provide adequate traction, and sanding material specifications which
insures use of a clean and durable media. A comprehensive street
sweeping and flushing program will remove material before dust problems
occur. The reduction in PM10 emissions from fugitive road dust,
between the base year inventory (911.84 tpy), and the attainment
inventory (738.11 tpy) was calculated at 19% or 173.73 tpy. Credit for
this reduction is given to the SWMP only. No credit was taken for two
other control strategies outlined in the SIP, a voluntary woodburning
curtailment program and dust control plans for three industrial
sources. The reduction in ``total'' PM10 emissions between the
base year inventory (1238.98 tpy) and attainment inventory (1137.39
tpy) is 8% or 101.19 tpy. (The reason for the reduction in fugitive
road dust emissions being greater than the reduction for total
emissions between the base and attainment years, is that there was an
increase in fugitive dust emissions over the same period of 87.35 tpy
from two industrial sites. The overall result, however, is a net
decrease in emissions). The voluntary woodburning curtailment plan and
the industrial dust control plan were submitted with the SIP; EPA is
taking no action on these two programs.
A more detailed discussion of the individual source contributions
and their associated control measures (including available control
technology) can be found in the TSD. EPA has reviewed the State's
documentation and concluded that it adequately justifies the control
measures to be implemented. RACM does not require the implementation of
all available control measures where an area demonstrates timely
attainment and the implementation of additional available control
measures would not expedite attainment. 57 FR 13543. The implementation
of Wyoming's PM10 nonattainment plan control strategy will result
in the attainment of the PM10 NAAQS by December 31, 1994.\5\ By
this document, EPA is proposing to approve the Sheridan SIP, which
includes the proposal to approve RACM (including RACT).
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\5\The Act requires demonstration of attainment by December 31,
1994. However, when this SIP was submitted, the Group I requirements
called for attainment demonstration in 1989, with maintenance
through 1994. Although the State did submit additional information
in response to the Clean Air Act Amendments, the demonstration of
attainment did not change. EPA believes, however, that since the
Wyoming DEQ has shown maintenance of the NAAQS through 1994, the
State has met the requirements to show attainment by December 31,
1994.
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4. Demonstration
As noted, the initial moderate PM10 nonattainment areas must
submit a demonstration (including air quality modeling) showing that
the plan will provide for attainment as expeditiously as practicable
but no later than December 31, 1994 (see section 189(a)(1)(B) of the
Act). Alternatively, the State must show that attainment by December
31, 1994 is impracticable. In the General Preamble, EPA recommended
that the attainment demonstrations for the initial moderate areas
follow existing modeling guidelines for PM10 or, if appropriate,
be developed consistent with the supplemental attainment demonstration
policy issued for initial areas (see 57 FR 13539).
Wyoming conducted an attainment demonstration using dispersion
modeling in combination with receptor modeling for Sheridan. The State
submitted the PM10 modeling protocol to EPA on July 12, 1988. The
submittal included an explanation justifying the protocol, as follows:
since the PM10 data collected during the 11 quarters prior to
development of the initial modeling protocol were in compliance with
the 24-hour PM10 standard, the Division did not find it necessary
to model for the 24-hour standard.\5\ In fact, a violation of the 24-
hour PM10 NAAQS has not been monitored in this area.\6\ A single
exceedence of 198 g/m3 was monitored on November 12, 1991.
However, data results (Attachment 6 of the Appendix to the SIP) showed
that, even with the ``gray zone'' allowance, the annual PM10
standard had been violated. (The ``gray zone'' allowance refers to a 20
percent overestimation of PM10 concentrations resulting from
design flaws in the pre-1987 non-reference Sierra Anderson SA321A
sampler; the problem was resolved when the sampler was modified and
became the SA321B.) This explained the reasoning for the State's
decision to focus on the annual standard, and for the annual PM10
standard of 50 g/m3 becoming the controlling standard. EPA
responded to the State on October 26, 1988 supporting this approach.
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\5\The Act requires demonstration of attainment by December 31,
1994. However, when this SIP was submitted, the Group I requirements
called for attainment demonstration in 1989, with maintenance
through 1994. Although the State did submit additional information
in response to the Clean Air Act Amendments, the demonstration of
attainment did not change. EPA believes, however, that since the
Wyoming DEQ has shown maintenance of the NAAQS through 1994, the
State has met the requirements to show attainment by December 31,
1994.
\6\EPA does not anticipate much change in population, based upon
population data for Sheridan County submitted by DEQ on November 8,
1991. The data were obtained from the January 1988 and July 1991
reports from the Department of Administration and Information,
Division of Economic Analysis, ``Wyoming Population and Employment
Forecast Report.'' The population forecast including the years 1986
(population = 26,449) through 1994 (population = 24,209), indicates
that Sheridan County will not reach the 1986 population until the
year 2004. After having examined the impact of growth on the 24-hour
PM10 NAAQS, the Division is confident of maintenance of the
standard.
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The demonstration for the annual standard indicates that the NAAQS
for PM10 will be attained by 1989 in Sheridan, Wyoming, and
maintained.\7\ Maintenance of the standard was addressed in the
Division's December 20, 1989 letter to EPA. The annual PM10 NAAQS
standard will be attained when the expected annual arithmetic mean
concentration is less than or equal to 50 g/m3. The original
demonstration predicted that the annual design concentration in the
attainment year of 1989 would be 48.8 g/m3 (Control Option #6,
1989 SIP). The revised attainment demonstration submitted in March
1990, predicted an annual concentration of 46 g/m3,
demonstrating attainment of the annual PM10 NAAQS. The control
strategy used to achieve the annual design concentration is summarized
in the section titled ``RACM (including RACT).'' As discussed, because
there have been no violations of the 24-hour PM10 standard in
Sheridan, an attainment analysis of the 24-hour standard was not
performed. EPA believes that the controls adopted to protect the annual
standard are sufficient to maintain the 24-hour standard. For a more
detailed description of the attainment demonstration and the control
strategies used, see the TSD accompanying this document.
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\7\See footnote 5.
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5. PM10 Precursors
The control requirements which are applicable to major stationary
sources of PM10 also apply to major stationary sources of
PM10 precursors unless EPA determines such sources do not
contribute significantly to PM10 levels in excess of the NAAQS in
that area (see section 189(e) of the Act). The General Preamble
contains guidance addressing how EPA intends to implement section
189(e) (57 FR 13539-13540 and 13541-13542).
An analysis of air quality and emissions data for the nonattainment
area of Sheridan demonstrates that violations of the annual NAAQS are
attributable chiefly to direct particulate matter emissions from re-
entrained road dust and woodburning. The emission inventory and CMB
data for Sheridan did not reveal any significant sources of sulfates or
nitrates in the area. Consequently, EPA is proposing to find that major
sources of precursors of PM10 do not contribute significantly to
PM10 levels in excess of the NAAQS. The consequence of this
finding is to exclude any such sources from the applicability of
PM10 nonattainment area control requirements. Further discussion
of the analyses and supporting rationale for EPA's finding are
contained in the TSD accompanying this notice. Note that while EPA is
proposing to make a general finding for this area, today's proposed
finding is based on the current character of the area including, for
example, the existing mix of sources in the area. It is possible,
therefore, that future growth could change the significance of
precursors in the area. The EPA intends to issue future guidance
addressing such potential changes in the significance of precursor
emissions in an area.
6. Quantitative Milestones and Reasonable Further Progress (RFP)
The PM10 nonattainment area plan revisions demonstrating
attainment must contain quantitative milestones which are to be
achieved every 3 years until the area is redesignated attainment and
which demonstrate RFP, as defined in section 171(1), toward attainment
by December 31, 1994 (see section 189(c) of the Act). Reasonable
further progress is defined in section 171(1) as such annual
incremental reductions in emissions of the relevant air pollutant as
are required by Part D or may reasonably be required by the
Administrator for the purpose of ensuring attainment of the applicable
NAAQS by the applicable date.
In considering the quantitive milestones and RFP provisions for
this initial moderate area, EPA has reviewed the attainment
demonstration for the area to determine the nature of any milestones
necessary to ensure timely attainment and whether annual incremental
reductions should be required in order to ensure attainment of the
PM10 NAAQS by December 31, 1994 (see section 171(1) of the Act).
The PM10 SIP for the Sheridan nonattainment area demonstrates
attainment by December 31, 1994 satisfying the initial quantitive
milestone requirement.\8\ EPA also proposes to find that at this time
the SIP meets Reasonable Further Progress.
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\8\The emissions reduction progress made prior to the attainment
date of December 31, 1994 (only 46 days beyond the November 15, 1994
milestone date) will satisfy the first milestone requirement (57 FR
13539). The de minimis timing differential makes it administratively
impractable to require separate milestone and attainment
demonstrations.
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7. Enforceability Issues
All measures and other elements in the SIP must be enforceable by
the State and EPA (see sections 172(c)(6), 110(a)(2)(A) and 57 FR
13556). The EPA criteria addressing the enforceability of SIPs and SIP
revisions were stated in a September 23, 1987 memorandum (with
attachments) from J. Craig Potter, Assistant Administrator for Air and
Radiation, et al. (see 57 FR 13541). Nonattainment area plan provisions
must contain a program that provides for enforcement of the control
measures and other elements in the SIP (see section 110(a)(2)(C)). The
credited control measure contained in the SIP is the SWMP, addressed
above under the section headed ``RACM (Including RACT).'' This control
measure applies to winter time street sanding and sweeping. The mayor
of Sheridan approved and adopted the street sanding plan on February
21, 1989. This signed document was submitted as part of the August 28,
1989 SIP submittal. The program designates specific city limitations/
guidelines for the following parameters: sanding routes, application
rates, sanding materials and street cleaning. The program, according to
the State's Attorney General, is enforceable by the State if the local
agency fails to implement the program. The authority is derived
directly from state statute (W.S. 35-11-201, 701 and 901).
8. Contingency Measures
As provided in section 172(c)(9) of the Act, all moderate
nonattainment area SIP's that demonstrate attainment must include
contingency measures. See generally 57 FR 13510-13512 and 13543-13544.
These measures must be submitted by November 15, 1993 for the initial
moderate nonattainment areas. Contingency measures should consist of
other available measures that are not part of the areas's control
strategy. These measures must take effect without further action by the
State or EPA, upon a determination by EPA that the area has failed to
make RFP or attain the PM10 NAAQS by the applicable statutory
deadline. The Sheridan SIP's contingency measure is the use of a
chemical de-icer in lieu of sand on certain roadways. The SIP provides
that the contingency measure can take effect without further action by
the State or EPA Administrator, should EPA determine that the Sheridan,
Wyoming nonattainment area has failed to make RFP or to attain the
PM10 standard by the statutory attainment date of December 31,
1994. After review of the contingency measure, EPA is proposing to
approve the Sheridan, Wyoming, contingency plan.
III. Implications of Today's Action
The EPA is proposing to approve the plan revision originally
submitted to EPA for the Sheridan nonattainment area on August 28, 1989
along with the subsequent submittals mentioned earlier (including the
contingency measure). The State of Wyoming has demonstrated that the
Sheridan moderate PM10 nonattainment area attained the PM10
NAAQS in 1989 and that it will continue to maintain the standard
through 1994.
As noted, additional submittals for the initial moderate PM10
nonattainment areas, such as a new source review permit program meeting
the requirements of sections 173 and 189 of the Act, were due after the
November 15, 1991 SIP requirements addressed in this notice. The EPA
will determine the adequacy of any such submittal as appropriate.
IV. Request for Public Comments
The EPA is requesting comments on all aspects of today's proposal.
As indicated at the outset of this notice, EPA will consider any
comments received by April 18, 1994.
V. Executive Order (EO) 12866
This action has been classified as a Table 2 action by the Regional
Administrator under the procedures published in the Federal Register on
January 19, 1989 (54 FR 2214-2225), as revised by an October 4, 1993
memorandum from Michael H. Shapiro, Acting Assistant Administrator for
Air and Radiation. A future notice will inform the general public of
these tables. On January 6, 1989, the Office of Management and Budget
(OMB) waived Table 2 and Table 3 SIP revisions (54 FR 222) from the
requirements of section 3 of Executive order 12291 for 2 years. The EPA
has submitted a request for a permanent waiver for Table 2 and Table 3
SIP revisions. The OMB has agreed to continue the waiver until such
time as it rules on EPA's request. This request continues in effect
under Executive Order 12866 which superseded Executive Order 12291 on
September 30, 1993.
VI. Applicability to Future SIP Decisions
Nothing in this action should be construed as permitting or
allowing or establishing a precedent for any future request for
revision to any State Implementation Plan. Each request for revision to
any State Implementation Plan shall be considered separately in light
of specific technical, economic, and environmental factors and in
relation to relevant statutory and regulatory requirements.
VII. Regulatory Flexibility
Under the Regulatory Flexibility Act, 5 U.S.C. 600 et seq., EPA
must prepare a regulatory flexibility analysis addressing the impact of
any proposed or final rule on small entities. 5 U.S.C. 603 and 604.
Alternatively EPA may certify that the rule will not have a significant
economic impact on a substantial number of small entities. Small
entities include small businesses, small not-for-profit enterprises,
and government entities with jurisdiction over population of less than
50,000.
SIP approvals under section 110 and subchapter I, part D of the
Clean Air Act do not create any new requirements, but simply approve
requirements that the State is already imposing. Therefore, because the
Federal SIP-approval does not impose any new requirements, I certify
that it does not have a significant impact on small entities affected.
Moreover, due to the nature of the federal-state relationship under the
Act, preparation of a regulatory flexibility analysis would constitute
federal inquiry into the economic reasonableness of state action. The
Clean Air Act forbids EPA to base its action concerning SIPs on such
grounds. Union Electric Co. v. U.S. E.P.A., 427 U.S. 246, 256-66 (S.Ct.
1976); 42 U.S.C. 7410(a)(2).
List of Subjects in 40 CFR Part 52
Environmental protection, Air pollution control, Hydrocarbons,
Intergovernmental relations, Nitrogen dioxide, Particulate matter,
Reporting and recordkeeping requirements, Sulfur dioxide, and Volatile
organic compounds.
Authority: 42 U.S.C. 7401-7671q.
Dated: March 2, 1994.
William P. Yellowtail,
Regional Administrator.
[FR Doc. 94-6390 Filed 3-17-94; 8:45 am]
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