[Federal Register Volume 59, Number 130 (Friday, July 8, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-16506]
[[Page Unknown]]
[Federal Register: July 8, 1994]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Parts 52 and 81
[IN15-2-6326A; FRL-5008-5]
Approval and Promulgation of Implementation Plans and Designation
of Areas for Air Quality Planning Purposes; State of Indiana
AGENCY: Environmental Protection Agency.
ACTION: Final rule.
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SUMMARY: The United States Environmental Protection Agency (USEPA) is
approving three requests to redesignate marginal ozone nonattainment
areas in the State of Indiana to attainment. The USEPA is also
approving their accompanying maintenance plans as State Implementation
Plan (SIP) revisions. The redesignation requests and maintenance plans
were submitted by the Indiana Department of Environmental Management
(IDEM) for the following ozone nonattainment areas: St. Joseph and
Elkhart, Vanderburgh, and Marion Counties. The State has met the
requirements for redesignation contained in the Clean Air Act (the
Act), as amended in 1990. The redesignation requests are based on
ambient monitoring data that show no violations of the ozone National
Ambient Air Quality Standard (NAAQS) during the three-year period from
1990 through 1992. In the proposed rules section of this Federal
Register, USEPA is proposing approval of and soliciting public comment
on these requested redesignations and SIP revisions. If adverse
comments are received on this direct final rule, USEPA will withdraw
this final rule and address these comments in a final rule on the
related proposed rule which is being published in the proposed rules
section of this Federal Register. Adverse comments received concerning
a specific geographic area, St. Joseph and Elkhart, Vanderburgh, or
Marion Counties, will only affect this final rule as it pertains to
that area and only the portion of this final rule concerning the area
receiving adverse comments will be withdrawn.
EFFECTIVE DATES: This action will be effective September 6, 1994,
unless notice is received by August 8, 1994, that someone wishes to
submit adverse comments. If the effective date is delayed, timely
notice will be published in the Federal Register.
ADDRESSES: Copies of the SIP revision and USEPA's analyses are
available for inspection at the following address: (It is recommended
that you telephone Edward Doty at (312) 886-6057 before visiting the
Region 5 Office.)
United States Environmental Protection Agency, Region 5, Air and
Radiation Division, 77 West Jackson Boulevard, Chicago, Illinois 60604.
A copy of these SIP revisions is available for inspection at the
following location: Office of Air and Radiation (OAR) Docket and
Information Center (Air Docket 6102), Room M1500, United States
Environmental Protection Agency, 401 M Street SW., Washington, DC
20460, (202) 260-7548.
Written comments can be mailed to: J. Elmer Bortzer, Chief,
Regulation Development Section (AR-18J), Regulation Development Branch,
Air and Radiation Division, United States Environmental Protection
Agency, Region 5, 77 West Jackson Boulevard, Chicago, Illinois 60604.
FOR FURTHER INFORMATION CONTACT: Edward Doty, Regulation Development
Section (AR-18J), Regulation Development Branch, Air and Radiation
Division, United States Environmental Protection Agency, Region 5, 77
West Jackson Boulevard, Chicago, Illinois 60604, Telephone Number (312)
886-6069.
SUPPLEMENTARY INFORMATION: The redesignation requests and maintenance
plans considered in this rulemaking were submitted by the Indiana
Department of Environmental Management (IDEM) for the following ozone
nonattainment areas: South Bend/Elkhart (St. Joseph and Elkhart
Counties, submitted on September 22, 1993); Evansville (Vanderburgh
County, submitted on November 4, 1993); and Indianapolis (Marion
County, submitted on November 12, 1993).
I. USEPA Redesignation Policy
The Act's requirements for redesignation to attainment are
contained in section 107(d)(3)(E) of the Act, and discussed in a
September 4, 1992 memorandum from the Director of the Air Quality
Management Division, Office of Air Quality Planning and Standards, to
Directors of Regional Air Divisions. As outlined in this memorandum,
section 107(d)(3)(E) of the Act requires that the following conditions
be met for redesignation to attainment:
1. The USEPA must determine that the areas subject to the
redesignation request have attained the National Ambient Air Quality
Standard (NAAQS);
2. The USEPA must have fully approved the applicable SIP for the
areas under section 110(k) of the Act;
3. The USEPA must determine that the improvements in air quality
are due to permanent and enforceable reductions in emissions resulting
from the implementation of the applicable SIP, Federal air pollution
control regulations, and other federally enforceable emission
reductions;
4. The USEPA must have fully approved maintenance plans for the
areas as meeting the requirements of section 175A of the Act; and
5. The State must have met all requirements applicable to the areas
under section 110 and Part D of the Act.
To demonstrate that the areas have attained the ozone NAAQS, the
State must show that the ozone data representative of the highest ozone
concentrations in the areas do not indicate violations of the NAAQS at
any monitoring site in the areas during the most recent three years of
monitoring at the sites. In accordance with 40 CFR 50.9, the annual
average number of expected exceedances of the ozone standard (0.12
parts per million [ppm], one-hour averaged) at any monitor can not
exceed 1.0 during the preceding three year period. The data used in
this demonstration must be quality assured, in accordance with 40 CFR
part 58, and collected in accordance with 40 CFR part 50, appendix H.
The data should be recorded in USEPA's Aerometric Information Retrieval
System (AIRS).
The SIP for the areas must be fully approved under section 110(k)
of the Act and must satisfy all requirements that apply to the areas.
These requirements include new requirements added by the 1990 Act
amendments. The State must meet all requirements of section 110 and
Part D of the Act that were applicable prior to the submittal of the
complete, finally adopted redesignation request(s). (It should be noted
that, based on section 175A of the Act, other requirements of Part D of
the Act remain in effect until the USEPA approves the maintenance plan
and redesignation to attainment. If the USEPA disapproves the request
to redesignate an area, these requirements remain in effect with no
delay.) A SIP which meets the pre-redesignation request submittal
requirements must be fully approved by the USEPA prior to USEPA's
approval of the redesignation of the areas to attainment of the NAAQS.
The requirements of Title I of the Act, which includes section 110 and
Part D of the Act, are discussed in the General Preamble to Title I (57
FR 13498, April 16, 1992).
The State must be able to reasonably attribute the improvements in
air quality to permanent and enforceable emission reductions.
Attainment resulting from temporary emission reductions or from
favorable (not conducive to high ozone concentrations) meteorology
would not qualify as a permanent air quality improvement. The State
should demonstrate that the emission reductions from a past high ozone
period (generally the year or period for which the area ozone
classification design values were determined), to the period of
attainment were due to permanent and enforceable emission control
measures and were sufficient to explain the attainment of the ozone
NAAQS.
Prior to the redesignation of an area to attainment, the USEPA must
fully approve a maintenance plan (as a SIP revision) which meets the
requirements of section 175A of the Act. The maintenance plan must
provide for maintenance of the NAAQS attainment in the area(s) for at
least 10 years after the USEPA approval of the redesignation request.
The maintenance plan must contain additional emission control measures
as necessary to assure maintenance of the NAAQS (generally this means
maintaining the ozone precursor emissions at or below the attainment
year levels). The Act also requires (section 175A(b)) a second SIP
revision 8 years after an area is redesignated to attainment to assure
maintenance of the NAAQS for an additional 10 years beyond the first 10
year maintenance period.
The maintenance plan must contain such contingency measures as the
USEPA deems necessary to ensure prompt correction of any violation of
the NAAQS occurring after an area is redesignated to attainment or
exceedance of other triggering levels, such as emissions exceeding
attainment levels (this could be caused by emission increases not
anticipated in the maintenance plan).
At a minimum, the maintenance plan should contain the following
elements:
1. Attainment Inventory
The State must develop an emissions inventory for the initial
period of attainment to identify the level of emissions in each area
which is associated with attainment of the NAAQS. This emissions
inventory must be consistent with USEPA's most recent guidance on
preparation and documentation of emission inventories. For ozone
nonattainment areas, the inventory should be based on actual, typical
summer weekday emissions of ozone precursors (Volatile Organic
Compounds [VOC], Oxides of Nitrogen [NOx], and Carbon Monoxide [CO]).
2. Maintenance Demonstration
A State may generally demonstrate maintenance of the NAAQS by
either showing that future emissions of the ozone precursors will not
exceed the levels of the emissions in the attainment inventory or by
modeling to demonstrate that the future mix of sources and emission
rates will not cause a violation of the NAAQS. The maintenance plan
should be based on the same type and level of modeling used to
demonstrate attainment of the NAAQS in the SIP. Regardless of which
approach is used, the State must project the emissions for the 10 year
period following the anticipated time of the USEPA approval of the
redesignation request (the State should assume that the USEPA will take
two years to complete the rulemaking on the redesignation request). The
projected emissions must reflect the expected actual emissions based on
enforceable emission rates and typical source activity rates (such as
production rates) adjusted for expected source growth. Projected
emission reductions must reflect the impacts of permanent, enforceable
emission control measures. The assumptions of emission reductions and
source growth and techniques used to project the emissions must be
clearly documented.
3. Monitoring Network
The maintenance plan must contain provisions for the continued
operation of air quality monitors of the applicable type (ozone
monitors in this case) in the areas to be redesignated to attainment.
This is needed to provide verification of the maintenance of the NAAQS
attainment, and is also needed to provide triggering data for the
possible activation of the contingency measures in the event of a
future violation or exceedance of the NAAQS (the State may choose to
activate some contingency measures even when the NAAQS is simply
exceeded but not yet violated to prevent future NAAQS violations).
4. Verification of Continued Attainment
The State must assure that it has the legal authority to implement
and enforce all measures necessary to attain and maintain the NAAQS. In
addition, the maintenance plan must indicate how the State will track
the progress and success of the maintenance plan. This includes
tracking air quality levels and emissions.
5. Contingency Plan
Section 175A of the Act requires that a maintenance plan include
contingency provisions, as necessary, to promptly correct any violation
of the NAAQS that occurs after the redesignation of an area to
attainment. For the purposes of section 175A, a State is not required
to fully adopt contingency measures that will take effect without
further action by the State. The contingency plan, however, is
considered to be an enforceable part of the SIP and must ensure that
the contingency measures will be adopted and implemented expeditiously
after they are triggered. The plan must clearly identify the measures
that will be adopted, a schedule and procedure for their adoption and
implementation, and a specific time limit for action by the State. The
plan must also identify the specific indicators or triggers that will
be used to determine when the contingency measures will be required.
II. Summary of the Indiana Redesignation Submittals
Summarized below are the contents of the three IDEM redesignation
requests and maintenance plans.
A. Current Designations and Area Definitions
On November 6, 1991 (56 FR 56694) the USEPA formally designated the
Evansville, (Vanderburgh County); Indianapolis, (Marion County); and
South Bend/Elkhart (Elkhart and St. Joseph Counties) areas as marginal
ozone nonattainment areas. These designations and classifications were
based on ozone standard violations monitored in these areas in 1988.
B. Monitored Attainment of the NAAQS
B.1. Evansville Area
During the most recent three years with quality assured monitoring
data as addressed in the Evansville area redesignation request (1990
through 1992), ozone was monitored at six sites in Indiana and at two
sites in Kentucky. No exceedance of the ozone standard was monitored
during this period, with the highest monitored ozone concentration
being 0.122 ppm, one-hour averaged, at the Mount Vernon monitoring site
in 1990.
The worst-case historical sites (AIRS site 19-173-0002 in Warrick
County and the Old State Road site in Vanderburgh County) recorded a
number of ozone standard exceedances in 1988 and 1989. The Warrick
County site recorded three exceedances in 1988, 0.133 ppm, 0.132 ppm,
and 0.128 ppm. The Old State Road site recorded two exceedances in
1988, 0.146 ppm and 0.127 ppm, and one exceedance, 0.146 ppm, in 1989.
The exceedances recorded in Warrick County are believed by the State to
be due to the impact of emissions from Vanderburgh County, which is an
adjoining county just west of Warrick County. The 1990 through 1992
data for these sites show no exceedances of the ozone standard (0.12
ppm one-hour averaged), with the peak ozone concentration at the
Warrick County site being 0.118 ppm and that at the Old State Road site
being 0.115 ppm.
These data show that attainment of the ozone NAAQS has been
monitored in the Evansville area based on the most recent air quality
data available at the time of the redesignation request submittal. To
further support this case, the 1993 data showed no exceedances of the
ozone standard.
B.2. Indianapolis Area
During the most recent three years with quality assured monitoring
data prior to the redesignation submittal (1990 through 1992), ozone
was monitored at seven sites in the Indianapolis area. Only one
exceedance, 0.125 ppm, was recorded (recorded at the Trailer Court Road
site in Indianapolis in 1990) in this area during this period.
The worst-case historical sites (1321 South Harding in Indianapolis
and Noblesville in Hamilton County) recorded a number of exceedances of
the ozone standard during the 1987 through 1989 period. The Noblesville
monitor recorded three exceedances, 0.130 ppm, 0.130 ppm, and 0.127
ppm, during this period. The 1321 South Harding monitor also recorded
three exceedances, 0.147 ppm, 0.142 ppm, and 0.137 ppm, during this
period. The 1990 through 1992 data for these sites show no exceedances
of the ozone standard (0.12 ppm one-hour averaged), with the peak
concentration at the Noblesville site being 0.117 ppm and that at the
1321 South Harding site being 0.104 ppm.
These data show that attainment of the ozone NAAQS has been
monitored in the Indianapolis area. To further support this case, the
1993 data showed no exceedances of the ozone standard at any of the
monitoring sites in the Indianapolis area.
B.3. South Bend/Elkhart Area
During the 1990 through 1992 period, ozone was monitored at five
sites in the South Bend/Elkhart area. No exceedance of the ozone
standard was monitored during this period, with the maximum monitored
concentration being 0.124 ppm, monitored at the Ross Beatty High School
in Cass County, Michigan in 1991.
The worst-case historical site, Childrens Hospital in South Bend,
recorded three ozone standard exceedances, 0.137 ppm, 0.135 ppm, and
0.130 ppm, in 1988. The 1990 through 1992 data for this site show no
exceedances of the ozone standard (0.12 ppm one-hour averaged), with
the peak monitored ozone concentration being 0.107 ppm.
These data show that attainment of the ozone NAAQS has been
monitored in the South Bend/Elkhart area. To further support this case,
the 1993 data showed no exceedances of the ozone standard at any of the
monitoring sites in the area.
C. Meeting Applicable Requirements of Section 110 and Part D
As noted in 40 CFR 52.773, the USEPA has approved Indiana's ozone
SIP as meeting the requirements of section 110(a)(2) and Part D of the
Act, as amended in 1977, for Elkhart, Marion, and St. Joseph Counties.
(Since Vanderburgh County was designated as attainment for ozone prior
to the 1990 amendment of the Act and prior to the submittal deadlines
covered under other requirements of the pre-1990 Act, Vanderburgh
County was subject only to Prevention of Significant Deterioration
(PSD) regulations, which the USEPA has promulgated for Indiana and has
delegated to the State of Indiana for implementation. Vanderburgh
County, however, is subject to the amended requirements of Part D as
addressed below.) The 1990 Act amendments, however, modified section
110(a)(2) and, under Part D, revised sections 172 and 182 adding new
requirements for all nonattainment areas. Therefore, for purposes of
redesignation, to satisfy the requirement that the SIP meet all
applicable requirements under the Act, USEPA has reviewed the SIP to
ensure that it contains all measures and information that were due
under the Act, as amended in 1990, prior to or at the same time Indiana
submitted its redesignation requests as considered here. The USEPA
interprets section 107(d)(3)(E)(V) of the Act to mean that, for a
redesignation request to be approved, the State must have met all
requirements that applied to the subject areas prior to or at the same
time of the submission of the complete redesignation requests.
Requirements of the Act that come due subsequently continue to be
applicable to the areas at later dates (see section 175A(c)) and, if
the redesignation of any of the areas is disapproved, the State remains
obligated to fulfill those requirements.
C.1. Section 110 Requirements
Although section 110 was amended in 1990, the Indiana SIP for the
areas addressed in this rulemaking meets the requirements of amended
section 110(a)(2). A number of the requirements in section 110(a)(2)
did not change in substance and, therefore, USEPA believes that the
pre-amendment SIP meets these requirements. As to those requirements
that were amended (57 FR 27936 and 23939, June 23, 1993), many
duplicate other requirements of the Act, which are addressed below.
C.2. Part D Requirements
Before the subject Indiana areas may be redesignated to attainment,
the areas must meet the applicable requirements of Part D. Under Part
D, an area's classification indicates the requirements to which it will
be subject. Subpart 1 of Part D sets forth the basic requirements
applicable to all nonattainment areas. Subpart 2 of Part D establishes
additional requirements for nonattainment areas classified under table
1 of section 181(a). As described in the General Preamble for the
Implementation of Title I, specific requirements of Subpart 2 may
override Subpart 1's general provisions (57 FR 13501, (April 16,
1922)). Elkhart, Marion, St. Joseph, and Vanderburgh Counties were
classified as marginal ozone nonattainment areas (56 FR 56694,
(November 6, 1991)). Therefore, in order to be redesignated to
attainment, the State, for these Counties, must meet the applicable
requirements of subpart 1 of Part D, as well as the applicable
requirements of Subpart 2 of Part D.
C.2.a. Subpart 1 of Part D--Section 172(c) Provisions
Section 172(c) sets forth general requirements applicable to all
nonattainment areas. Under section 172(b), the section 172(c)
requirements are applicable on a schedule as determined by the
Administrator, but no later than three years after an area has been
designated as nonattainment under the amended Act. The USEPA has not
determined that these requirements were applicable to ozone
nonattainment areas on or before November 12, 1993--the date by which
the State of Indiana submitted the complete redesignation requests
considered here. Therefore, the State of Indiana was not required to
meet these requirements for redesignation purposes. In addition, as
discussed below, Indiana has either satisfied the section 172(c)
requirements or, as is the case for several of them, they lose their
continued force once an area has demonstrated attainment and
maintenance of the ozone NAAQS.
The requirements of section 172(c) are discussed below along with
their relevancy to the redesignation requests at hand:
(1) Section 172(c)(1) requires SIPs to provide for all Reasonably
Available Control Measures (RACM) as expeditiously as practicable and
to provide for attainment of the NAAQS. As discussed elsewhere in this
rulemaking, Indiana has completed the adoption of stationary source
Reasonably Available Control Technology (RACT) require for the
Indianapolis and South Bend/Elkhart ozone nonattainment areas. The
USEPA has approved these RACT regulations in prior rulemaking.
In addition, the USEPA notes that, with respect to all three of the
areas that are the subject of this notice, no additional RACM controls
beyond what may already be required in the SIP are necessary upon
redesignation to attainment. The General Preamble (57 FR 13560, (April
16, 1992)) explains that section 172(c)(1) requires the plans for all
nonattainment areas to provide for the implementation of RACM as
expeditiously as practicable. The USEPA interprets this requirement to
impose a duty on all nonattainment areas to consider all available
control measures and to adopt and implement such measures as are
reasonably available for implementation in the area components of the
areas' attainment demonstrations. Because attainment has been reached
in all three areas, no additional measures are needed to provide for
attainment.
(2) Section 172(c)(2) requires the SIP to provide for Reasonable
Further Progress (RFP) towards attainment of the NAAQS. This
requirement only has relevance during the time it takes an area to
attain the NAAQS. Because the areas covered by this rulemaking have
already attained the NAAQS, the SIP has already achieved the necessary
RFPs toward that goal for the three areas.
(3) Section 172(c)(3) requires the SIP to contain a comprehensive,
accurate, current inventory of actual emissions from all source of the
relevant pollutants. As noted elsewhere in this rulemaking, the State
of Indiana has developed and submitted such an emissions inventory for
the areas covered here. As also noted elsewhere in this rulemaking, the
USEPA has approved this emissions inventory.
(4) Section 172(c)(4) requires the SIP to identify and quantify the
emissions which will be allowed to result from the construction of
major new or modified stationary sources in each of the areas. This
requirement has been addressed in Indiana's revised New Source Review
(NSR) regulations, which have been submitted to the USEPA (see a
discussion of this submittal below). The approval of Indiana's NSR
regulations would also satisfy section 172(c)(5) NSR provisions.
Although the USEPA has not completed approval of Indiana's NSR
regulations, it should be noted that once an area is redesignated to
attainment, nonattainment NSR requirements are not generally
applicable. The redesignated area(s) then becomes subject to Prevention
of Significant Deterioration (PSD) requirements instead of the NSR
requirements. The USEPA has promulgated acceptable PSD regulations for
Indiana and has delegated the implementation of these regulations to
the State.
(5) Section 172(c)(7) requires the SIP to meet the applicable
provisions of section 110(a)(2). As noted above, the USEPA believes the
Indiana SIP meets the requirements of section 110(a)(2).
(6) Section 172(c)(9) requires the SIP to contain contingency
measures to be undertaken if an area fails to make RFP or fails to
attain the NAAQS. Since the areas covered by this rulemaking have
attained the NAAQS, the section 172(c)(9) contingency measure
requirements are not applicable unless the redesignation requests and
maintenance plans are not fully approved. It should be noted that
section 175A contingency measures apply to areas that are redesignated
to attainment.
C.2.b. Other Part D Requirements
See the discussion below concerning the implementation of the new
requirements of Part D of the 1990 amended Act.
D. Improvement of Air Quality Due to Permanent and Enforceable Emission
Reductions
Indiana has developed and submitted 1990 base year ozone precursor
emission inventories for all of the State's ozone nonattainment areas.
Indiana used the 1990 base year emissions data available at the time
the redesignation requests were prepared to backcast (the use of source
category annual growth factors, emission control impacts, and other
source-specific data to estimate past year emissions) to 1988 emission
levels. The 1988 backcasted emissions were compared to the 1990
emissions to show that emission reductions could explain the observed
improvement in ozone concentrations between 1988 and the 1990-1992
period.
D.1. Evansville Area
A listing of major source VOC emissions for 1988 and 1990 shows
that stationary source VOC emissions in Vanderburgh County declined by
339 tons per year (approximately 1.1 tons per day) between 1988 and
1990. Permanent VOC emission reductions due to source closures and
implementation of emission controls totalled 570 tons per year in the
same period (some of this emission reduction was offset by source
growth). Indiana asserts that these point source emission reductions
are permanent and enforceable. Indiana will not renew the source
permits of closed sources, will require these sources to undergo review
under PSD or NSR requirements if they seek to restart, and will
prohibit these facilities from banking the pre-closure emissions
against future source growth. Documentation is also given in the
redesignation submittal showing that NOX emissions declined by
approximately 17.5 tons per day at stationary point sources between
1988 and 1990, due primarily to source closures.
In addition to emission reductions from the major stationary source
closures and emission controls, Vanderburgh County has also experienced
VOC emission reductions as the result of the implementation of the
Federal Motor Vehicle Emission Control Program (FMVCP) and the
implementation of gasoline Reid Vapor Pressure (RVP) reduction
requirements.
D.2. Indianapolis Area
Revised VOC point source emissions for 1988 and 1990 were included
in the redesignation submittal. VOC emission reductions due to
permanent source closures (see discussion above for the Evansville area
regarding Indiana's approach to dealing with source closures) and
application of emission controls have reduced point source VOC
emissions by 2,239.22 tons per year between 1988 and 1990.
In addition to emission reductions from the major stationary source
closures and emission controls, Marion County has also experienced VOC
emission reductions as the result of the implementation of the Federal
Motor Vehicle Emission Control Program (FMVCP) and the implementation
of gasoline RVP reduction requirements.
D.3. South Bend/Elkhart Area
IDEM has provided emissions data for individual stationary point
source facilities in St. Joseph and Elkhart Counties showing that a
permanent, enforceable VOC emission reduction of 857 tons per year (2.7
tons per day assuming 312 days per year of source operation) occurred
between 1988 and 1990.
In addition to emission reductions from the major stationary source
closures and emission controls, Elkhart and St. Joseph Counties have
also experienced VOC emission reductions as the result of the
implementation of the Federal Motor Vehicle Emission Control Program
(FMVCP) and the implementation of gasoline RVP reduction requirements.
E. Maintenance Plans
The redesignation requests for all three areas contain common
maintenance plan elements. First, the State commits to continue
monitoring of ozone during the 10-year maintenance period following the
redesignation of the areas. Any changes in the monitoring systems will
be subject to USEPA approval. Second, the State commits to revise the
maintenance plans 8 years after the areas are redesignated to cover an
additional 10-year period beyond the initial 10-year maintenance
period. The State has selected 2006 as the year ending the initial 10-
year maintenance period. Third, to help verify maintenance of the
standard, the State commits to require major stationary sources to
annually submit information on their emissions in accordance with the
State's emission statement rule (326 IAC 2-6). Finally, the State has
selected a joint set of possible contingency emission control measures
and a common approach to triggering the need for contingency measures
in each area.
Indiana plans on a two-level approach for the triggering of
contingency measures. A Level I response would occur in the event that
the ozone NAAQS is violated. This response would entail conducting an
analysis to determine the level of the control measures needed to
assure expeditious future attainment of the ozone NAAQS. Measures that
could be implemented quickly would be selected so as to be in place
within 12 months after the State becomes aware of a NAAQS violation.
This will require the State to adopt the regulations prior to and in
time to achieve the 12-month implementation deadline.
A Level II response would be implemented in the event that:
a. The monitored ambient levels of ozone exceed 0.115 ppm more than
once in any year at any site in any one of the redesignated areas;
b. The level of VOC, CO, or NOX emissions increase above the
level of the 1990 emissions, corrected for any errors found prior to
the approval to the redesignation requests. (The State is in a
continual process of upgrading the emissions inventory as a result of
updated emission factors and ongoing quality assurance procedures.
Significant future changes in the base year emission inventories
resulting from this process must be addressed in SIP revisions); or
c. The level of total VOC emissions for any area determined for any
future year has increased above the level recorded in the prior year
sufficiently so that an increase of the same magnitude in the following
year would result in a level of emissions exceeding those recorded in
1990 by 5 percent or more.
A Level II response would consist of a study to determine whether
the noted trends are likely to continue, and, if so, to determine
control measures necessary to reverse the trends, taking into
consideration ease and timing of implementation as well as economic and
social considerations. Implementation of necessary controls in response
to a Level II trigger will take place as expeditiously as practicable
but no later than 18 months after the State is aware that a contingency
measure trigger level has been exceeded. This will require the State to
adopt the required emission reduction regulations prior to and in time
to achieve the 18 month implementation deadline.
The analysis technique used to select emission control measures
under Level I and Level II will be mutually agreed upon by the State
and the USEPA.
The maintenance plan contingency measures to be considered and
selected will be chosen from the following list or any other emission
control measures deemed appropriate based on a consideration of cost-
effectiveness, VOC reduction potential, economic and social
considerations, or other factors that the State deems to be
appropriate:
a. Lower Reid Vapor Pressure for gasoline;
b. Reformulated gasoline program;
c. Stage II gasoline vapor recovery;
d. Vehicle anti-tampering program;
e. Broader geographic coverage of existing regulations;
f. Application of RACT on sources covered by new control techniques
guidelines issued in response to the 1990 Act amendments;
g. Application of RACT to smaller existing sources;
h. Vehicle inspection/maintenance program;
i. Implementation of one or more transportation control measures
sufficient to achieve at least a 0.5 percent reduction in actual area
wide VOC emissions. The transportation control measures to be
considered would include: (1) Trip reduction programs, including but
not limited to employer-based transportation management programs, area
wide rideshare programs, work schedule changes, and telecommuting; (2)
transit improvements; (3) traffic flow improvements; and (4) other
measures;
j. Alternative fuel programs for fleet vehicle operations;
k. Controls on consumer products consistent with those adopted
elsewhere in the United States;
l. Enhanced vehicle inspection/maintenance program;
m. VOC offsets for new or modified major sources;
n. VOC offsets for new or modified minor sources;
o. Increased ratio of VOC offsets required for new sources; and
p. Require VOC controls on new minor sources.
The demonstration of maintenance differs for each area as discussed
below.
E.1. Evansville Area
Indiana has projected 2006 mobile source emissions using USEPA's
MOBILE 5.0 model and documented growth factors for Vehicle Miles
Travelled (VMT). Emissions for the year 2006 were determined for the
other source categories using documented growth factors, including
growth data supplied by the United States Department of Commerce,
Bureau of Economic Analysis (BEA), and accounting for known post-1990
source closures. Indiana also used guidance and techniques provided in
the USEPA guideline ``Procedures for Preparing Emission Projections''
(EPA-450/4-91-019). The year 2006 was assumed to be 10 years after the
anticipated time for USEPA's approval of the redesignation request.
Emission estimates have been updated to reflect Indiana's current
estimates of the 1990 base year ozone precursor emissions inventory.
Emissions estimates for the attainment base year (1990), 2006, and
several interim years are given below:
VOC Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 12.76 13.74 14.73 15.91
Area sources........ 12.46 12.82 13.18 13.61
On-road mobile
sources............ 25.25 20.77 16.29 10.91
Off-road mobile
sources............ 7.50 7.74 8.00 8.28
Biogenic sources.... 8.37 8.37 8.37 8.37
---------------------------------------------------
Total......... 66.34 63.44 60.57 57.08
------------------------------------------------------------------------
CO Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 1.20 1.28 1.36 1.46
Area sources........ 1.71 1.77 1.84 1.91
On-road mobile
sources............ 155.33 131.15 106.96 77.94
Off-road mobile
sources............ 41.00 42.93 44.86 47.18
Biogenic sources.... N.A. N.A. N.A. N.A.
---------------------------------------------------
Total......... 199.24 177.13 155.02 128.49
------------------------------------------------------------------------
NOX Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 2.78 2.98 3.18 3.42
Area sources........ 2.14 2.27 2.41 2.57
On-road mobile
sources............ 14.11 13.31 12.52 11.56
Off-road mobile
sources............ 7.70 7.86 8.02 8.21
Biogenic sources.... N.A. N.A. N.A. N.A.
---------------------------------------------------
Total......... 26.73 26.42 26.13 25.76
------------------------------------------------------------------------
It should be noted that the interim year emissions above were
determined by the USEPA based on discussions with IDEM. USEPA and IDEM
agreed that the interim year emission estimates should be based on
linear interpolation between the 1990 and 2006 emission estimates for
all three areas subject to this redesignation rulemaking. This is
consistent with the source growth estimation procedure used by the
State to estimate the 2006 emission levels, and the USEPA believes that
this method is appropriate and reasonable for estimating the interim
year emissions. The USEPA believes that this method provides reasonable
estimates of the emission levels in those years and does not
underestimate those emissions.
Based on the 1990 base year and 2006 projected emissions, VOC
emissions are projected to decrease by 14.0 percent, CO emissions are
projected to decrease by 35.5 percent, and NOx emissions are
projected to decrease by 3.7 percent over the 16 year period. Interim
year emissions are expected to remain below the attainment year
emission level. IDEM believes maintenance of the ozone standard has
been demonstrated because VOC emissions are projected to decrease
between 1990 and 2006.
E.2. Indianapolis Area
The City of Indianapolis, which was responsible for the 1990 base
year emission estimates for Marion County, used the same approach
followed by IDEM for Evansville to project 1990 base year emissions to
2006. The following emissions for 1990 and 2006 (expressed in tons per
summer weekday) are contained in a March 21, 1994 supplement to the
Indianapolis redesignation request (Indiana revised its attainment year
and projected emission estimates based on comments on the States 1990
base year emission inventories received during public hearings). The
interim year emissions were determined by the USEPA based on linear
interpolation between the 1990 and 2006 emission estimates.
VOC Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 29.2 29.9 30.6 31.5
Area sources........ 48.7 52.3 55.9 60.2
On-road mobile
sources............ 107.2 96.1 85.0 71.7
Off-road mobile
sources............ 19.2 20.6 22.0 23.6
Biogenic sources.... N.A. N.A. N.A. N.A.
---------------------------------------------------
Totals........ 204.3 198.9 193.5 187.0
------------------------------------------------------------------------
CO Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 124.4 127.9 131.3 135.5
Area sources........ 37.9 39.2 40.5 42.0
On-road mobile
sources............ 731.5 665.9 600.3 521.6
Off-road mobile
sources............ 147.7 158.1 168.5 181.0
Biogenic sources.... N.A. N.A. N.A. N.A.
---------------------------------------------------
Totals........ 1041.5 991.1 940.6 880.1
------------------------------------------------------------------------
NOX Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 53.6 49.7 45.8 41.1
Area sources........ 30.9 32.6 34.5 36.6
On-road mobile
sources............ 63.4 63.3 63.2 63.1
Off-road mobile
sources............ 28.6 29.0 29.4 29.8
Biogenic sources.... N.A. N.A. N.A. N.A.
---------------------------------------------------
Totals........ 176.5 174.6 172.9 170.6
------------------------------------------------------------------------
Based on the 1990 base year and 2006 projected emissions, VOC
emissions are projected to decrease by 8.5 percent, CO emissions are
projected to decrease by 15.5 percent, and NOx emissions are
projected to decrease by 3.3 percent over the 16 year period. IDEM and
the City of Indianapolis believe maintenance of the ozone standard has
been demonstrated because VOC emissions are projected to decrease
between 1990 and 2006.
E.3. South Bend/Elkhart Area
Indiana has projected the 2006 mobile source emissions using
USEPA's MOBILE 5.0 model and documented growth factors for VMT.
Emissions for 2006 were determined for the other source categories
using documented growth factors, including growth data supplied by the
Bureau of Economic Affairs (BEA), and known source closures occurring
after 1990. Indiana also used guidance and techniques provided in the
USEPA guideline ``Procedures for Preparing Emission Projections'' (EPA-
450/4-91-019). Emission estimates have been updated to reflect
Indiana's current estimates of the 1990 base year ozone precursor
emissions inventory.
The following 1990 and 2006 emissions for Elkhart and St. Joseph
Counties in tons per summer weekday are contained in a February 25,
1994, supplement to the Evansville and South Bend/Elkhart redesignation
requests (Indiana revised its attainment year and projected emission
estimates based on comments on the States 1990 base year emission
inventories received during public hearings). The interim year
emissions were linearly interpolated by the USEPA.
VOC Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 14.44 15.79 17.13 18.75
Area sources........ 41.83 43.64 45.45 47.62
On-road mobile
sources............ 39.83 33.85 27.86 20.68
Off-road mobile
sources............ 10.13 10.58 11.02 11.56
Biogenic sources.... 19.62 19.62 19.62 19.62
---------------------------------------------------
Totals........ 125.85 123.48 121.08 118.23
------------------------------------------------------------------------
CO Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 1.06 1.14 1.23 1.33
Area sources........ 5.47 5.64 5.80 6.00
On-road mobile
sources............ 249.95 216.29 182.63 142.24
Off-road mobile
sources............ 56.42 59.32 62.22 65.70
Biogenic sources.... N.A. N.A. N.A. N.A.
---------------------------------------------------
Totals........ 312.90 282.39 251.88 215.27
------------------------------------------------------------------------
NOX Emissions (Tons Per Day)
------------------------------------------------------------------------
1990 1995 2000 2006
------------------------------------------------------------------------
Point sources....... 10.81 11.61 12.42 13.38
Area sources........ 6.32 6.70 7.08 7.53
On-road mobile
sources............ 31.36 30.07 28.78 27.24
Off-road mobile
sources............ 17.82 17.70 17.58 17.44
Biogenic sources.... N.A. N.A. N.A. N.A.
---------------------------------------------------
Totals........ 66.31 66.08 65.86 65.59
------------------------------------------------------------------------
Based on the 1990 base year and 2006 projected emissions, VOC
emissions are projected to decrease by 6.1 percent, CO emissions are
projected to decrease by 31.2 percent, and NOX emissions are
projected to decrease by 1.1 percent over the 16 year period. These
emission decreases between 1990 and 2006 demonstrate maintenance of the
ozone standard.
F. Implementation of New Requirements of Section 110 and Part D of the
Act
Although the SIPs for the three areas were previously approved by
the USEPA under section 110 of the Act, the Act, as amended in 1990,
has added new requirements. Below is a summary of the status of
Indiana's compliance with the requirements for marginal nonattainment
areas, such as the areas covered by this rulemaking.
F.1. Submittal of a Comprehensive Base Year Emissions Inventory
Indiana has submitted final, adopted 1990 base year emission
estimates and associated documentation for the subject areas. The
emission inventories for these areas have been reviewed in a separate
technical support document and have been found to be acceptable. A
direct final rulemaking approving these emission inventories was
published on June 20, 1994 (59 FR 31544).
F.2. Emission Statement SIP Revision
Indiana has submitted a SIP revision covering regulations requiring
the submittal of annual emission statements by facilities with
potential VOC emissions equal to or exceeding 25 tons per year. This
SIP revision has been reviewed in a separate rulemaking. A direct final
rulemaking approving this SIP revision was published on June 10, 1994
(59 FR 29953).
F.3. New Source Review Regulations
The State of Indiana has submitted NSR regulations in compliance
with section 182(a)(2)(C) of the Act. The USEPA is in the process of
reviewing these regulations. Although the USEPA has not approved these
regulations, it should be noted that the USEPA does not consider
compliance with these requirements to be a prerequisite to the
redesignation of an area to attainment of the ozone NAAQS. The USEPA
believes that the applicability of the Part C PSD program to
maintenance areas makes it unnecessary to require that an area have
obtained full approval of NSR revisions required by Part D of the Act
in order to be redesignated. The USEPA believes that this
interpretation of the Act is appropriate notwithstanding section
175A(d)'s requirement that the contingency provisions of a maintenance
plan include a commitment on the part of the State to implement all
measures to control the relevant air pollutants that were contained in
the SIP prior to redesignation. The term ``measure'' is not defined in
section 175A(d) and it appears that Congress utilized the terms
``measure'' or ``control measure'' differently in different provisions
of the Act that concern the PSD and NSR permitting programs. Compare
section 110(a)(2)(A) and (C) with section 161. In light of this
ambiguity in the use of the term ``measure,'' USEPA believes that term
``measure'' as used in section 175A(d) may be interpreted so as not to
include NSR permitting programs. That this is an appropriate
interpretation is further supported by USEPA's historical practice,
dating back even before the 1990 amendment of the Act, of not requiring
redesignating areas to demonstrate through modeling or to otherwise
justify replacing the nonattainment NSR program with the PSD program
once the areas were redesignated. Rather, the USEPA has historically
allowed the NSR programs to be automatically replaced by the PSD
programs upon redesignation.
F.4. RACT Corrections
As required by section 182(a)(2)(A) of the Act, Indiana has
corrected RACT deficiencies previously identified by the USEPA. These
RACT corrections were approved by the USEPA on March 6, 1992 (57 FR
8086).
F.5. Conformity of Federal Actions With the SIP
Section 176(c) of the CAA requires States to revise their SIPs to
establish criteria and procedures to ensure that Federal actions,
before they are taken, conform to the air quality planning goals in the
applicable SIP. The requirement to determine conformity applies to
transportation plans, programs and projects developed, funded or
approved under Title 23 U.S.C. or the Federal Transit Act
(``transportation conformity''), as well as to all other Federal
actions (``general conformity''). Section 176 further provides that the
conformity revisions to be submitted by States must be consistent with
Federal conformity regulations that the CAA required USEPA to
promulgate. Congress provided for the State revisions to be submitted
one year after the date for promulgation of final USEPA conformity
regulations. When that date passed without such promulgation, USEPA's
General Preamble for the Implementation of Title I informed States that
its conformity regulations would establish a submittal date (see 57 FR
13498, 13557 (April 16, 1992)).
The USEPA promulgated final transportation conformity regulations
on November 24, 1993 (58 FR 62188) and general conformity regulations
on November 30, 1993 (58 FR 63214). These conformity rules require the
States to adopt both transportation and general conformity provisions
in the SIP for areas designated nonattainment or subject to a
maintenance plan approved under section 175A of the CAA. Pursuant to
Sec. 51.396 of the transportation conformity rule and Sec. 51.851 of
the general conformity rule, the State of Indiana is required to submit
a SIP revision containing transportation conformity criteria and
procedures consistent with those established in the Federal rule by
November 25, 1994. Similarly, Indiana is required to submit a SIP
revision containing general conformity criteria and procedures
consistent with those established in the Federal rule by December 1,
1994. Because the deadlines for these submittals have not yet come due,
they are not applicable requirements under section 107(d)(3)(E)(v) and,
thus, do not affect approval of the redesignation request. It should be
noted, however, that the State of Indiana has committed to the
submittal of these SIP revisions by the required submittal deadlines.
F.6. Vehicle Inspection and Maintenance
Section 182(a)(2)(B) of the Act presents the savings clause for
vehicle inspection and maintenance, requiring the adoption and
implementation of a vehicle inspection and maintenance program if
already included in the SIP (prior to the 1990 amendments of the Act)
or if required by section 172(b)(11)(B) of the pre-1990 Act. The USEPA
fully approved Indiana vehicle inspection and maintenance plan on July
31, 1990 (55 FR 31048). The approved plan only applied to Clark, Floyd,
Lake, and Porter Counties. The areas subject to this redesignation
rulemaking were not required to implement a vehicle inspection and
maintenance program.
III. Summary of USEPA Review of Redesignation Requests
1. Monitored Attainment of the NAAQS
IDEM has collected quality assured ozone data in all three areas
showing attainment of the ozone standard at all monitoring sites during
the most recent three years of monitoring (1990-1992). These data are
recorded in AIRS. These data show compliance with this redesignation
requirement. Additionally, the 1993 data show continued monitored
attainment of the ozone NAAQS.
2. Approved State Implementation Plans
All three areas are covered by a SIP approved under section 110 and
Part D of the Act. Indiana has implemented this SIP in all three areas.
This implementation includes the adoption and implementation of USEPA
approved RACT regulations and other required reasonably available
control measures required by the pre-1990 Act. Indiana has corrected
all previously noted RACT deficiencies, and USEPA has fully approved
Indiana's RACT regulations.
3. Improvement of Air Quality Due to Permanent and Enforceable Emission
Reductions
In all three areas, implementation of VOC emission control
requirements and permanent, enforceable emission reductions from source
closures have led to VOC emission reductions.
4. Maintenance Plans
The contingency portions of the maintenance plans were found to be
acceptable. In addition, demonstrations of maintenance have been made
for all three areas through emission projections to 2006.
One issue concerning the contingency measures, however, must be
noted. As discussed above, Indiana has chosen to include the
implementation of tighter gasoline RVP (requiring lower RVP)
requirements as a contingency measure. At the same time Indiana was
finalizing its maintenance plans, the USEPA issued new guidance
concerning the use of lower RVP as contingency measures in maintenance
plans. This new guidance was provided in a November 8, 1993 memorandum
from Michael Horowitz, Office of General Counsel, to Directors of Air
and Radiation Divisions. The guidance indicates that, for States to
include lower RVP as a contingency measure in maintenance plans, the
maintenance plan must include several things with respect to this
contingency measure. First, the maintenance plan must indicate that if
the former nonattainment area fell back into nonattainment, the State
would submit a request to the USEPA to find under section 211(c)(4)(C)
of the Act that the lower RVP requirement is necessary for the area to
achieve the ozone NAAQS. Second, since the implementation of a lower
RVP would rely upon USEPA's determination of whether it was necessary
to achieve attainment, the State must provide for the possibility that
a lower RVP could not be implemented. To do so, the State would need to
provide for a backup measure in the maintenance plan. The maintenance
plan could also include a commitment to adopt, as an alternative to the
specified measure, measures identified by the USEPA as practicable in
its denial of the State's request for a lower RVP requirement. If the
State chooses to adopt measures specified by the USEPA and the USEPA
has provided several options for acceptable measures, the State must
adopt the requisite number of these measures as is necessary to again
achieve the standard. The State would need to include a schedule for
submittal of the section 211(c)(4)(C) request to the USEPA and a
schedule for final adoption and implementation of a lower RVP standard,
or the back-up measure(s), or the alternative measures selected by the
USEPA. The schedule would need to be tied to the triggering event for
the contingency measure, not to USEPA action on the 211(c)(4)(C)
request.
Notwithstanding the November 8, 1993 policy discussed above, which
was not available to Indiana at the time the State was finalizing and
submitting its maintenance plans to the USEPA, USEPA is approving
Indiana's maintenance plans as they currently exist. This is because
Indiana has identified a wide range of contingency measures to choose
from in the maintenance plan and is, therefore, not relying exclusively
on lower RVP requirements as a contingency measure. If Indiana,
however, upon the triggering of the need to implement contingency
measures, chooses to implement requirements for lower RVP, Indiana must
submit the section 211(c)(4)(C) request in compliance with the Act.
5. Implementation of All Requirements of Section 110 and Part D of the
Act
As indicated above, all requirements of the Act applicable to these
areas have been met through SIP revision submittals. These SIP
revisions must be approved through final rulemaking before or at the
same time as final rulemaking on the redesignation of the areas.
IV. Final Rulemaking Action
The State of Indiana has met the requirements of the Act revising
the Indiana ozone SIP. The USEPA approves the redesignation of
Evansville (Vanderburgh County); Indianapolis (Marion County); and
South Bend/Elkhart (St. Joseph and Elkhart Counties) to attainment for
ozone.
Because USEPA considers this action to be noncontroversial and
routine, the USEPA is approving it without prior approval. This action
will become effective on September 6, 1994. However, if the USEPA
receives adverse comments by August 8, 1994, then the USEPA will
publish a notice that withdraws the action, and will address these
comments in the final rule on the requested redesignation and SIP
revision which has been proposed for approval in the proposed rules
section of this Federal Register. The comment period will not be
extended or reopened. This withdrawal will be done on a geographic
basis if the adverse comments received do not concern all three
geographic areas. For example, if USEPA receives adverse comments
concerning the South Bend/Elkhart Area redesignation request, only that
portion of the final rule concerning the South Bend/Elkhart Area will
be withdrawn.
The OMB has exempted this regulatory action from Executive Order
12866 review.
Nothing in this action should be construed as permitting or
allowing or establishing a precedent for any future request for
revision to any SIP. Each request for revision to any SIP shall be
considered separately in light of specific technical, economic, and
environmental factors and in relation to relevant statutory and
regulatory requirements.
Under the Regulatory Flexibility Act, 5 U.S.C. 600 et seq., USEPA
must prepare a regulatory flexibility analysis assessing the impact of
any proposed or final rule on small entities. 5 U.S.C. 603 and 604.
Alternatively, USEPA 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.
The SIP approvals under section 110 and subchapter I, part D, of
the 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
Act forbids USEPA to base its actions concerning SIPs on such grounds.
Union Electric Co. v. USEPA, 427 U.S. 246, 256-66 (1976).
List of Subjects in 40 CFR Parts 52 and 81
Air pollution control, Carbon monoxide, Environmental protection,
Hydrocarbons, Nitrogen dioxide, Ozone, Volatile organic compounds.
Dated: June 21, 1994.
Valdas V. Adamkus,
Regional Administrator.
Parts 52 and 81, chapter I, title 40 of the Code of Federal
Regulations are amended as follows:
PART 52--[AMENDED]
1. The authority citation for part 52 continues to read as follows:
Authority: 42 U.S.C. 7401-7671q.
Subpart P--Indiana
2. Section 52.777 is amended by adding paragraph (f) to read as
follows:
Sec. 52.777 Control strategy: Photochemical oxidants (hydrocarbons).
* * * * *
(f) Approval--The Indiana Department of Environmental Management
submitted three ozone redesignation requests and maintenance plans
requesting the ozone nonattainment areas to be redesignated to
attainment for ozone: South Bend/Elkhart (St. Joseph and Elkhart
Counties), submitted on September 22, 1993; Evansville (Vanderburgh
County), submitted on November 4, 1993; Indianapolis (Marion County),
submitted on November 12, 1993. The redesignation requests and
maintenance plans meet the redesignation requirements in section
107(d)(3)(d) of the Act as amended in 1990. The redesignations meet the
Federal requirements of section 182(a)(1) of the Clean Air Act as a
revision to the Indiana ozone State Implementation Plan for the above
mentioned counties.
* * * * *
PART 81--[AMENDED]
1. The authority citation for part 81 continues to read as follows:
Authority: 42 U.S.C. 7401-7871q.
2. In Section 81.315 the attainment status designation table for
ozone is amended by revising the following; designated areas to read as
follows:
Sec. 81.315 Indiana.
* * * * *
Indiana--Ozone
------------------------------------------------------------------------
Designation Classification
Designated areas -----------------------------------------------
Date Type Date Type
------------------------------------------------------------------------
*****
Evansville area:
Vanderburgh County.... (*) Attainment............. ...... ......
Indianapolis area:
Marion County......... (*) Attainment............. ...... ......
*****
South Bend-Elkhart area:
Elkhart County........ (*) Attainment............. ...... ......
St. Joseph County..... (*) Attainment............. ...... ......
*****
------------------------------------------------------------------------
*September 6, 1994.
[FR Doc. 94-16506 Filed 7-7-94; 8:45 am]
BILLING CODE 6560-50-P
