Clean Air Act Reclassification; Arizona--Phoenix Nonattainment Area; Ozone

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[Federal Register: September 2, 1997 (Volume 62, Number 169)]
[Proposed Rules]
[Page 46229-46234]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr02se97-26]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 81

[AZ-001-BU; FRL-5886-7]

Clean Air Act Reclassification; Arizona--Phoenix Nonattainment
Area; Ozone

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: EPA proposes to determine that the Phoenix, Arizona moderate
ozone nonattainment area has not attained the 1-hour ozone national
ambient air quality standard (NAAQS) by the Clean Air Act (CAA)
mandated attainment date for moderate nonattainment areas, November 15,
1996. EPA also proposes to deny the State of Arizona's application for
a one-year extension of the November 15, 1996 attainment date for the
Phoenix area. The proposed determination and denial are based in whole
or in part on EPA's review of monitored air quality data from 1994
through 1996 for compliance with the 1-hour ozone NAAQS. If EPA takes
final action on the determination and denial as proposed, the Phoenix
ozone nonattainment area will be reclassified by operation of law as a
serious nonattainment area. The effect of such a reclassification would
be to continue progress toward attainment of the 1-hour ozone NAAQS
through the development of a new State implementation plan (SIP)
addressing attainment of that standard by November 15, 1999.

DATES: Comments on this proposal must be received in writing by October
2, 1997. Comments should be addressed to the contact listed below.

ADDRESSES: Copies of the State extension request, EPA's draft technical
support document for this rulemaking, and EPA's policies governing
attainment findings and extension requests are contained in the docket
for this rulemaking. A copy of this notice is also

[[Page 46230]]

available in the air programs section of EPA Region 9's website, http:/
/www.epa.gov/region09. The docket is available for inspection during
normal business hours at the following locations:

U.S. Environmental Protection Agency, Region 9, Office of Air
Planning, Air Division, 17th Floor, 75 Hawthorne Street, San
Francisco, California 94105. (415) 744-1248;
Arizona Department of Environmental Quality, Office of Outreach and
Information, First Floor, 3033 N. Central Avenue, Phoenix, Arizona
85012. (602) 207-2217; and
Maricopa County Environmental Services Department, Technical
Services Division, 1001 N. Central Avenue, Suite 201, Phoenix,
Arizona 85004 (602) 506-6010.

FOR FURTHER INFORMATION CONTACT: Frances Wicher, Office of Air Planning
(AIR-2), U.S. Environmental Protection Agency, Region 9, 75 Hawthorne
Street, San Francisco, California 94105. (415) 744-1248.

SUPPLEMENTARY INFORMATION:

I. Background

A. CAA Requirements and EPA Actions Concerning Designation and
Classifications

The Clean Air Act Amendments of 1990 (CAA) were enacted on November
15, 1990. Under section 107(d)(1)(C) of the CAA, each ozone area
designated nonattainment for the 1-hour ozone NAAQS prior to enactment
of the 1990 Amendments, such as the Phoenix area, was designated
nonattainment by operation of law upon enactment of the 1990
Amendments.¹ Under section 181(a) of the Act, each ozone
area designated nonattainment under section 107(d) was also classified
by operation of law as ``marginal,'' ``moderate,'' ``serious,''
``severe,'' or ``extreme'' depending on the severity of the area's air
quality problem. Ozone nonattainment areas with design values between
0.138 and 0.16 parts per million (ppm), such as the Phoenix area, were
classified as moderate. These nonattainment designations and
classifications were codified in 40 CFR part 81. See 56 FR 56694
(November 6, 1991).
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\1\ On July 18, 1997 (62 FR 38856), EPA revised the ozone NAAQS
to establish a 8-hour standard; however, in order to ensure an
effective transition to the new 8-hour standard, EPA also retained
the 1-hour NAAQS for an area until such time as it determines that
the area meets the 1-hour standard. See revised 40 CFR Sec. 50.9 at
62 FR 38894. As a result of retaining the 1-hour standard, CAA part
D, subpart 2 Additional Provisions for Ozone Nonattainment Areas,
including the reclassification provisions of section 181(b), remain
applicable to areas that are not attaining the 1-hour standard.
Unless otherwise indicated, all references in this notice are to the
1-hour ozone NAAQS.
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States containing areas that were classified as moderate
nonattainment by operation of law under section 107(d) were required to
submit State implementation plans (SIPs) designed to show progress
towards attainment, and attainment of the ozone NAAQS as expeditiously
as practicable but no later than November 15, 1996. Moderate area SIP
requirements are found primarily in section 182(b) of the CAA.

B. Reclassification to Serious

EPA has the responsibility, pursuant to section 181(b)(2)(A) of the
CAA, of determining, within six months of the applicable attainment
date (including any extension of that date) whether an ozone
nonattainment area has attained the ozone NAAQS. Under section
181(b)(2)(A), if EPA finds that a moderate area has not attained the
ozone NAAQS, it is reclassified by operation of law to the higher of
the next higher classification or to the classification applicable to
the area's design value at the time of the finding. Pursuant to section
181(b)(2)(B) of the Act, EPA must publish a notice in the Federal
Register identifying areas which failed to attain the standard and
therefore must be reclassified by operation of law.
The 1-hour ozone NAAQS is 0.12 ppm not to be exceeded on average
more than one day per year over any three year period. 40 CFR 50.9 and
Appendix H. EPA makes attainment determinations for ozone nonattainment
areas using the most recently available, quality-assured air quality
data covering the 3-year period up to and including the attainment
date.² Consequently, EPA will determine whether the Phoenix
area's air quality has met the moderate area attainment deadline of
November 15, 1996 based upon all 1994, 1995, and 1996 (through November
15) quality-assured air quality data available to the
Agency.³ From the available data, EPA determines the average
number of exceedances per year at each ozone monitor during this
period. If this number is greater than one at any monitor, then the
area is determined to have not attained by November 15, 1996. EPA then
calculates the design value for the area to determine the correct new
classification.⁴ A design value is an air quality
concentration and is a measure of the severity of an area's air
quality. Ozone design values are used to determine the correct
classification of an area and to determine the level of controls needed
for attainment.
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\2\ See generally 57 FR 13506 (April 16, 1992) and Memorandum
from D. Kent Berry, Acting Director, Air Quality Management
Division, EPA, to Regional Air Office Directors; ``Procedures for
Processing Bump Ups and Extensions for Marginal Ozone Nonattainment
Areas,'' February 3, 1994 (Berry memorandum). While explicitly
applicable only to marginal areas, the general procedures for
processing reclassifications and extension requests described in
this memorandum apply regardless of the initial classification of an
area because all reclassifications are made pursuant to the same
Clean Air Act requirements in section 181(b)(2).
\3\ All quality-assured available data includes all data
available from the state and local/national air monitoring (SLAMS/
NAMS) network as submitted to EPA's AIRS system and all data
available to EPA from special purpose monitoring (SPM) sites that
meet the requirements of 40 CFR 58.13. See Memorandum John Seitz,
Director, OAQPS, to Regional Air Directors; ``Agency Policy on the
Use of Ozone Special Purpose Monitoring Data,'' August 22, 1997 and
section I.D. of this notice.
\4\ See Memorandum from William G. Laxton, Director, Technical
Support Division to the Regional Air Directors; ``Ozone and Carbon
Monoxide Design Value Calculations,'' June 18, 1990.
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C. Attainment Date Extensions

If a state does not have the clean data necessary to show
attainment of the NAAQS, it may apply, under section 181(a)(5) of the
CAA, for a one year attainment date extension. Issuing an extension is
discretionary, but EPA can exercise that discretion only if the state
has: (1) Complied with the requirements and commitments pertaining to
the applicable implementation plan for the area, and (2) the area has
measured no more than one exceedance of the ozone NAAQS at any
monitoring site in the nonattainment area in the year preceding the
extension year. Section 181(a)(5) and Berry memorandum. Under section
181(a)(5), EPA may issue up to two such extensions if these conditions
have been met. The CAA's extension provision is intended to grant areas
close to attainment a short additional period in which to demonstrate
that they are in fact attaining the standard. The underlying premise of
an extension is that an area already has in place a control strategy
adequate to attain the ozone standard and that no additional measures
are necessary.
Areas that apply for an extension should document that they have
initiated rule development activities in order to meet the Act's
requirements associated with the new classification. Berry memorandum.

D. The Use of Special Purpose Monitoring Data

EPA's policy on the use of ozone special purpose monitoring data is
discussed briefly below and is described in the Memorandum entitled
``Agency

[[Page 46231]]

Policy on the Use of Ozone Special Purpose Monitoring Data'' from John
Seitz, Director, Office of Air Quality Planning and Standards, to the
Regional Air Directors, August 22, 1997.
40 CFR 50.9 and Appendix H set forth the method for determining
whether the ozone standard has been met. Section 50.9 provides:

The standard is attained when the expected number of days with
maximum hourly average concentrations above 0.12 ppm is equal to or
less than 1, as determined by Appendix H.

Monitoring to determine attainment under section 50.9 and Appendix
H is governed by 40 CFR part 58. As the Agency charged with
implementing the Clean Air Act, EPA has the authority to establish the
mechanisms necessary to monitor air quality. See CAA sections 103(c),
110(a)(2)(B), 301(a), and 319. Pursuant to this authority, EPA has
required that each state's implementation plan ensure the establishment
of an official network of air pollution monitors, as set forth in 40
CFR part 58. The official network is referred to as the State and Local
Air Monitoring Stations (SLAMS) network.
Data from SLAMS monitors are quality assured by the state and local
agencies prior to submission to EPA, and again by EPA when the data are
entered into EPA's database. Through this system, EPA ensures that its
regulatory decisions are based on scientific data that meet a
consistent standard of reliability.
For data from monitors that are not part of the SLAMS network
required by part 58, EPA regulations provide that EPA will exclude the
data when they do not meet the terms of 40 CFR 58.14 Special purpose
monitors. Section 58.14(a) provides:

Any ambient air quality monitoring station other than a SLAMS or
[prevention of significant deterioration] station from which the
State intends to use the data as part of a demonstration of
attainment or nonattainment or in computing a design value for
control purposes of the [NAAQS] must meet the requirements for SLAMS
described in section 58.22 and, after January 1, 1983, must also
meet the requirements for SLAMS as described in section 58.13 and
appendices A and E to this part.

Sections 58.13 and 58.22 prescribe the operating schedule and
monitoring methodology, respectively, for SLAMS monitors. Appendix A
contains quality assurance criteria to be followed by SLAMS monitors,
and Appendix E contains siting criteria for monitoring instruments.
Section 58.14(b) further provides:

Any ambient air quality monitoring station other than a SLAMS or
PSD station from which the State intends to use the data for SIP-
related functions other than as described in paragraph (a) of this
section is not necessarily required to comply with the requirements
for a SLAMS station under paragraph (a) but must be operated in
accordance with a monitoring schedule, methodology, quality
assurance procedures, and probe or instrument-siting specifications
approved by the Regional Administrator.

Thus, under its current regulations, if data recorded at special
purpose monitors meet the criteria of section 58.14, there is no basis
for EPA to exclude those data from consideration. Data which meet the
requirements of section 58.14(a) have been demonstrated to be of
equivalent reliability as official network monitors, and absent an
explicit regulatory basis for exclusion, must be taken into account.
Since the reliability of these data is based solely on technical and
scientific considerations, EPA has concluded that a state's intended
use of the SPM data is not an appropriate factor in determining whether
data from SPMs that otherwise meet the requirements of section 58.14
may be excluded from consideration in ozone designation and
classification determinations, in computing an ozone design value for
control purposes, or for other ozone SIP-related purposes.

II. Proposal in Regard to the Phoenix Ozone Nonattainment Area

A. The State of Arizona's Extension Application

On May 2, 1997, the Arizona Department of Environmental Quality
(ADEQ) requested a one-year extension of the ozone attainment date for
the Phoenix area. Letter, Russell F. Rhoades, Director, ADEQ to Felicia
Marcus, Regional Administrator, U.S. EPA Region 9, May 2, 1997. In the
letter, the State discusses the Phoenix area's compliance with the
Clean Air Act's two minimum criteria for an extension and also
describes the State's continuing efforts to ensure progress toward
ozone attainment. Attached to the letter is a table listing all 1996
exceedances of the 1-hour ozone standard in and around the Phoenix
area. This table listed not only the one exceedance recorded at a SLAMS
site (the Mesa site) but also the nine exceedances recorded at special
purpose monitoring (SPM) sites in the area. This list of exceedances is
reproduced in Table 1.

Table 1.--Ozone Exceedances in Maricopa County--1996
----------------------------------------------------------------------------------------------------------------
Site Type of site Date PPM
----------------------------------------------------------------------------------------------------------------
Blue Point............................... SPM July 23, 1996.............. 0.140
Blue Point............................... SPM August 16, 1996............ 0.132
Falcon Field............................. SPM July 23, 1996.............. 0.129
Fountain Hills........................... SPM May 21, 1996............... 0.128
Fountain Hills........................... SPM June 4, 1996............... 0.126
Fountain Hills........................... SPM July 23, 1996.............. 0.129
Fountain Hills........................... SPM August 28, 1996............ 0.132
Mesa..................................... SLAMS July 23, 1996.............. 0.127
Mt. Ord.................................. SPM May 21, 1996............... 0.130
Salt River Pima.......................... SPM July 23, 1996.............. 0.130
----------------------------------------------------------------------------------------------------------------

The Falcon Field and Fountain Hills monitoring sites are operated
by the Maricopa County Environmental Services Department (MCESD) and
are located along the rapidly-growing eastern edge of the metropolitan
Phoenix area.⁵ These sites were established in 1989 and
1996, respectively, and have been operated since as SPMs.⁶
The sites were

[[Page 46232]]

established in response to several audits (including one by EPA) that
found the County's monitoring network inadequate to meet minimum
monitoring requirements in EPA's regulations. EPA's monitoring
regulations require siting monitors in areas of maximum expected ozone
concentrations and maximum expected population exposure. Evaluation of
the ozone situation in the Phoenix area has indicated that the eastern
edge of the area is the most likely region for both maximum ozone
concentrations and, because of its high population growth rate, maximum
population exposure.
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\5\ The Blue Point and Mount Ord monitors are located outside
the boundaries of the Phoenix ozone nonattainment area but are
clearly influenced by emissions from the nonattainment area. For the
purposes of this notice, however, EPA has not considered data from
these monitors but may do so in future notices.
\6\ EPA has requested the conversion of these sites to SLAMS.
See letter, John Kennedy, U.S. EPA--Region 9 to Al Brown and
Violette Brown, MCESD, February 10, 1997. The County has requested
until conclusion of the State's air monitoring task force late this
fall before responding to EPA's request.
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EPA has evaluated the operation of each site in 1996 by reviewing
documentation prepared by MCESD and/or by independently auditing each
monitor. See Memorandum, Bob Pallarino, EPA, to John Kennedy, EPA;
``Adequacy of Maricopa County Ozone Monitoring network,'' July 31, 1997
and Memorandum, John Kennedy and Bob Pallarino, EPA, to Debbie Jordan
and Frances Wicher, EPA; ``Site Evaluation and Quality Control/Quality
Assurance Review of Selected Maricopa County Ozone Monitoring Sites,''
July 25, 1997. Based on its evaluation, EPA has determined that these
monitors are sited, equipped, and operated consistent with EPA's
regulations at 40 CFR part 58, subpart B and Appendices C and E and
that the 1996 data given in Table 1 meets EPA's quality assurance
requirements at 40 CFR part 58, Appendix A. Therefore, EPA has
considered the ozone exceedances from these SPMs in deciding whether to
issue an extension.
EPA is proposing to deny the State of Arizona's application for a
one-year extension of the moderate area ozone attainment date for the
Phoenix metropolitan nonattainment area. EPA is proposing this denial
because the Phoenix area had more than one exceedance at a monitor in
1996 (4 at Fountain Hills) and thus does not meet the second statutory
criterion for granting an extension, that is, the area has no more than
one exceedance in 1996.
Over the past year, the State of Arizona has been extensively
evaluating the Phoenix ozone problem. ADEQ has developed and continues
to refine an urban airshed model for the Phoenix area. In early 1996,
Governor Symington convened an Air Quality Strategies Task Force to
recommend both short- and long-term strategies for improving Phoenix's
air quality. The Task Force, which included business, environmental,
and local governmental representatives, recommended in December 1996, a
number of additional ozone reduction strategies for the area. Many of
these strategies are contained in legislation passed in the 1997
Arizona legislative session and were submitted to EPA on April 21, 1997
as part of the State's Voluntary Early Ozone Plan (VEOP). Additionally,
on June 3, 1997 (62 FR 30260), EPA approved Governor Symington's
request to extend the federal reformulated gasoline (RFG) program to
the Phoenix area and RFG is now available there. The State is currently
developing its own clean burning gasoline program. These measures are
in addition to the existing ozone control strategy that includes the
State's premier centralized enhanced vehicle inspection program
(approved by EPA on May 8, 1995) that already exceeds the CAA's vehicle
inspection and maintenance program requirement for serious areas.
Unfortunately, initial results from the air quality modelling
undertaken for the VEOP showed that the existing control strategy even
when combined with the additional measures contained in the VEOP were
not enough to demonstrate attainment of the ozone standard. Draft VEOP,
p. E-8. There were, however, significant technical concerns with these
initial modelling results and ADEQ continues to refine the UAM.
Preliminary results from this additional work support the draft VEOP's
basic finding that the Phoenix area will need additional emission
reductions in order to attain the ozone standard. See Memorandum,
Frances Wicher, EPA, to Docket AZ-001-BU; ``Record of Communication,''
August 8, 1997.
As noted before, the underlying premise of an extension is that an
area is close to attainment and already has in place the control
strategy needed for attainment. All evidence in front of the Agency
indicates that the Phoenix area is not close to attainment of the 1-
hour ozone standard and that, despite the State's dedicated efforts to
adopt and implement controls, the area will need to continue its on
going planning and control efforts. Thus, even if the Phoenix area met
the statutory requirements for granting an extension, EPA believes that
such an extension would not be appropriate at this time.

B. Proposed Nonattainment Determination

Attainment of the 1-hour ozone NAAQS is demonstrated in an area
when the expected number of days per calendar year with maximum hourly
average ozone concentrations above 0.12 ppm is equal to or less than
one. 40 CFR 50.9. The average number of days is calculated for a three-
year period. 40 CFR part 50, Appendix H and Laxton memo. The 1994-1996
period is used to demonstrate attainment by November 15, 1996.
Table 2 lists the 3-year average number of days over the 1-hour
ozone standard at each SLAMS monitoring site in the Phoenix
metropolitan area for the period 1994 to 1996 and each monitor's design
value for that period.⁷ Design values are calculated
following the procedures in the Laxton memo. A complete listing of the
ozone exceedances at each monitor as well as EPA's calculations of the
design values can be found in the TSD.
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\7\ EPA does not have compete 1994 and 1995 data from the SPM
sites and thus is not listing those sites in Table 2. However, based
on the limited data available to the Agency, six SPM sites (Papago
Park, Phoenix Supersite, Phoenix VEI, Falcon Field, Fountain Hills,
and Salt River Pima) averaged more than one ozone exceedance per
year in the 1994-1996 period. Thus, the limited SPM data EPA does
have confirm its proposed determination that the Phoenix area failed
to attain the 1-hour ozone standard by November 15, 1996.

Table 2.--Average Number of Ozone Exceedances Days per Year in the
Phoenix Metropolitan Area
[1994-1996]
------------------------------------------------------------------------
Number of Average
days over number of Site
Site the exceedance design
standard days per value
(1994-1996) year (PPM)
------------------------------------------------------------------------
South Phoenix.......................... 1 0.3 0.110
West Phoenix........................... 0 0.0 0.110
Mesa................................... 4 1.3 0.126
North Phoenix.......................... 4 1.3 0.125
Glendale............................... 0 0 0.109
Pinnacle Peak.......................... 1 0.3 0.119
Central Phoenix........................ 0 0 0.113
South Scottsdale....................... 1 0.3 0.121
------------------------------------------------------------------------

As can be seen from Table 2, two monitoring sites (Mesa and North
Phoenix) have averaged more than 1 exceedance day per year in the 1994-
1996 period. EPA is, therefore, proposing to find that the Phoenix
metropolitan area did not attain the 1-hour ozone NAAQS by the
statutory deadline for moderate area of November 15, 1996.
EPA is also proposing that the appropriate reclassification of the
area is to serious. Section 181(b)(2) requires the area to be
reclassified to the higher of the next higher classification or the

[[Page 46233]]

classification appropriate to the design value at the time of the
nonattainment finding. The next highest classification for Phoenix is
serious. The other potential classification is severe. Based on the
design value calculated using data solely from the SLAMS/NAMS network,
the area's design value is 0.126 ppm. Using the limited data set from
the SPMs, the area's maximum-possible design value is 0.132 ppm. Both
of these design values are well below the range required for a severe
classification, that is 0.180 to 0.280 ppm.

C. SIP Requirements for Serious Ozone Areas

Under section 181(a)(1) of the Act, the attainment deadline for
moderate area ozone nonattainment areas reclassified to serious under
section 181(b)(2) will be as expeditiously as practicable but no later
than November 15, 1999. Under section 182(i), these reclassified areas
are required to submit SIP revisions addressing the serious area
requirements for the 1-hour ozone NAAQS in section 182(c). Section
182(i) further provides that the Administrator may adjust the statutory
schedules for submittal of these SIP revisions. Accordingly, EPA is
exercising this authority to require submittal of the serious area SIP
revisions no later than 12 months from the effective date of the area's
reclassification. EPA believes that a 12 months schedule is appropriate
because attainment date for serious areas, November 15, 1999, is little
more than 2 years away and the State will need to expedite adoption and
implementation of controls to meet that deadline. EPA is requesting
comments on this schedule.
Under section 182(c), the requirements for serious ozone
nonattainment areas include, but are not limited to, the following: (1)
Attainment and reasonable further progress demonstrations; (2) an
enhanced vehicle inspection and maintenance program; (3) clean-fuel
vehicle programs; (4) a 50 ton-per-year major source threshold; (5)
more stringent new source review requirements; (6) an enhanced
monitoring program; and (7) contingency provisions.
EPA has issued a ``General Preamble for the Implementation of Title
I of the Clean Air Act Amendments of 1990'' that sets forth the
Agency's preliminary views on how it will act on SIPs submitted under
Title I of the Act. See generally 57 FR 13498 (April 16, 1992) and 57
FR 18070 (April 28, 1992).
EPA has recently promulgated an 8-hour ozone standard (62 FR 38856,
July 18, 1997). In order to facilitate the transition from the 1-hour
to the 8-hour NAAQS, EPA may issue additional guidance to assist states
in meeting the serious area requirements.
Nothing in this action should be construed as permitting or
allowing or establishing a precedent for any future action. Each
finding of failure to attain or request for an extension of an
attainment date shall be considered separately and shall be based on
the factual situation of the area under consideration and in relation
to relevant statutory and regulatory requirements.

III. Administrative Requirements

A. Executive Order (E.O.) 12866

Under E.O. 12866, (58 FR 51735, October 4, 1993), EPA is required
to determine whether today's proposal is a ``significant regulatory
action'' within the meaning of the E.O., and therefore should be
subject to OMB review, economic analysis, and the requirements of the
E.O. See E.O. 12866, sec. 6(a)(3). The E.O. defines, in sec. 3(f), a
``significant regulatory action'' as a regulatory action that is likely
to result in a rule that may meet at least one of four criteria
identified in section 3(f), including,
(1) Have an annual effect on the economy of $100 million or more or
adversely affect in a material way the economy, a sector of the
economy, productivity, competition, jobs, the environment, public
health or safety, or State, local, or tribal governments or
communities;
(2) Create a serious inconsistency or otherwise interfere with an
action taken or planned by another agency;
(3) Materially alter the budgetary impact of entitlements, grants,
user fees, or loan programs or the rights and obligations of recipients
thereof; or
(4) Raise novel legal or policy issues arising out of legal
mandates, the President's priorities, or the principles set forth in
the Executive Order.
EPA has determined that the finding of failure to attain proposed
today, as well as the establishment of SIP submittal schedules
resulting from a bump-up, would result in none of the effects
identified in E.O. 12866 sec. 3(f). Under section 181(b)(2) of the Act,
findings of failure to attain are based upon air quality
considerations, and reclassifications must occur by operation of law in
light of certain air quality conditions. These findings do not, in-and-
of-themselves, impose any new requirements on any sectors of the
economy. In addition, because the statutory requirements are clearly
defined with respect to the differently classified areas, and because
those requirements are automatically triggered by classifications that,
in turn, are triggered by air quality values, findings of failure to
attain and reclassification cannot be said to impose a materially
adverse impact on State, local, or tribal governments or communities.
The same is true of the determination not to grant a one-year
extension, in light of the fact that this determination is also based
in part on air quality values. Similarly, the establishment of new SIP
submittal schedules merely establishes the dates by which SIPs must be
submitted, and does not adversely affect entities.

B. Regulatory Flexibility

Under the Regulatory Flexibility Act, 5 U.S.C. Section 601 et.
seq., EPA must prepare a regulatory flexibility analysis assessing the
impact of any proposed or final rule on small entities. 5 U.S.C.
sections 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 populations
of less than 50,000.
A finding of failure to attain (and the consequent reclassification
by operation of law of the nonattainment area) under section 181(b)(2)
of the Act, a denial of a one-year extension request, and the
establishment of a SIP submittal schedule for a reclassified area, do
not, in-and-of-themselves, directly impose any new requirements on
small entities. See Mid-Tex Electric Cooperative, Inc. v. FERC, 773
F.2d 327 (D.C. Cir. 1985) (agency's certification need only consider
the rule's impact on entities subject to the requirements of the rule).
Instead, this rulemaking simply proposes to make a factual
determination and to establish a schedule to require States to submit
SIP revisions, and does not propose to directly regulate any entities.
Therefore, pursuant to 5 U.S.C. 605(b), EPA certifies that today's
proposed action does not have a significant impact on a substantial
number of small entities within the meaning of those terms for RFA
purposes.

C. Unfunded Mandates Reform Act

Title II of the Unfunded Mandates Reform Act of 1995 (UMRA), P.L.
104-4, establishes requirements for Federal agencies to assess the
effects of their regulatory actions on State, local, and tribal
governments and the private sector. Under section 202 of the UMRA, EPA
generally must prepare a written statement, including a cost-benefit
analysis, when EPA promulgates ``any general notice of proposed
rulemaking that is likely to result in promulgation

[[Page 46234]]

of any rule that includes any Federal mandate that may result in the
expenditures by State, local, and tribal governments, in the aggregate,
or by the private sector, of $100 million or more'' in any one year. A
``Federal mandate'' is defined, under section 101 of UMRA, as a
provision that ``would impose an enforceable duty'' upon the private
sector or State, local, or tribal governments'', with certain
exceptions not here relevant. Under sec. 203 of UMRA, EPA must develop
a small government agency plan before EPA ``establish[es] any
regulatory requirements that might significantly or uniquely affect
small governments''. Under section 204 of UMRA, EPA is required to
develop a process to facilitate input by elected officers of State,
local, and tribal governments for EPA's ``regulatory proposals'' that
contain significant Federal intergovernmental mandates. Under section
205 of UMRA, before EPA promulgates ``any rule for which a written
statement is required under [UMRA sec.] 202'', EPA must identify and
consider a reasonable number of regulatory alternatives and either
adopt the least costly, most cost-effective or least burdensome
alternative that achieves the objectives of the rule, or explain why a
different alternative was selected.
Sections 202, 204, and 205 of UMRA do not apply to today's action
because the proposed factual determination that Phoenix failed to reach
attainment does not, in-and-of-itself, constitute a Federal mandate
because it does not impose an enforceable duty on any entity. Although
the establishment of a SIP submission schedule may impose such a duty
on the State, this requirement merely establishes due dates, does not
set out any requirements not otherwise already present, and thus cannot
be considered to cost $100 million or more. Finally, section 203 of
UMRA does not apply to today's action because the regulatory
requirements proposed today--the SIP submittal schedule--affect only
the State of Arizona, which is not a small government under UMRA.

D. Rule vs. Adjudication

It should be noted that each of the three administrative
requirements described above--E.O. 12866, the Regulatory Flexibility
Act, and UMRA--apply only with respect to agency actions that fall into
the category of ``rules'', as defined under those provisions or under
the Administrative Procedures Act. E.O. 12866 sec. 3 (d)-(e);
Regulatory Flexibility Act, 5 U.S.C. sec. 603(a), 601(2); Unfunded
Mandates Reform Act, secs. 202-205, 421. EPA is considering the
possibility that today's action, to the extent it consists of a
determination that the Phoenix area failed to attain the ozone NAAQS as
of the end of 1996, might not be considered a ``rule'' as defined under
these provisions, and instead might be considered an informal
adjudication. The basis for this distinction could be that today's
action constitutes a specific factual determination applicable only to
the area in question, based on pre-existing facts. Under these
circumstances, the administrative requirements discussed above might
not apply. However, EPA is taking this approach under consideration, it
is not today proposing this approach.

List of Subjects in 40 CFR Part 81

Environmental protection, Air pollution control, Intergovernmental
relations, Ozone.

Authority: 42 U.S.C. sections 7401-7671q.

Dated: August 25, 1997.
Felicia Marcus,
Regional Administrator.
[FR Doc. 97-23234 Filed 8-29-97; 8:45 am]
BILLING CODE 6560-50-P

Notices For
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Clean Air Act Reclassification; Arizona--Phoenix Nonattainment Area; Ozone

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