[Federal Register Volume 84, Number 218 (Tuesday, November 12, 2019)]
[Rules and Regulations]
[Pages 60927-60931]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-23375]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Parts 52 and 81
[EPA-R04-OAR-2018-0552; FRL-10001-35-Region 4]
Air Plan Approval and Designation of Areas; FL; Redesignation of
the Hillsborough County 2010 1-Hour Sulfur Dioxide Nonattainment Area
to Attainment
AGENCY: Environmental Protection Agency (EPA).
ACTION: Final rule.
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SUMMARY: In a letter dated June 7, 2018, the State of Florida, through
the Florida Department of Environmental Protection (FDEP), submitted a
request for the Environmental Protection Agency (EPA) to redesignate
the Hillsborough County sulfur dioxide (SO2) nonattainment
area (hereinafter referred to as the
[[Page 60928]]
``Hillsborough County Area'' or ``Area'') to attainment for the 2010 1-
hour SO2 primary national ambient air quality standard
(NAAQS) and to approve an accompanying state implementation plan (SIP)
revision containing a maintenance plan for the Area. Through a letter
dated April 16, 2019, FDEP submitted a revision to the June 7, 2018,
redesignation request and SIP revision asking EPA to incorporate
certain conditions into the SIP from a recent permit revision
applicable to the Tampa Electric Company--Big Bend Station (Big Bend)
power plant. EPA is taking final action: To determine that the
Hillsborough County Area attained the 2010 1-hour SO2 NAAQS
by its applicable attainment date of October 4, 2018; to approve the
SIP revision containing the State's plan for maintaining attainment of
the 2010 1-hour SO2 standard and to incorporate the
maintenance plan into the SIP; to redesignate the Hillsborough County
Area to attainment for the 2010 1-hour SO2 NAAQS; and to
incorporate into the SIP certain permitting conditions applicable to
Big Bend, including a condition that lowers the SO2
emissions cap and a condition that restricts fuel use at two electric
generating units to natural gas.
DATES: This rule will be effective December 12, 2019.
ADDRESSES: EPA has established a docket for this action under Docket
Identification No. EPA-R04-OAR-2018-0552. All documents in the docket
are listed on the www.regulations.gov website. Although listed in the
index, some information may not be publicly available, i.e.,
confidential business information or other information whose disclosure
is restricted by statute. Certain other material, such as copyrighted
material, is not placed on the internet and will be publicly available
only in hard copy form. Publicly available docket materials are
available either electronically through www.regulations.gov or in hard
copy at the Air Regulatory Management Section, Air Planning and
Implementation Branch, Air and Radiation Division, U.S. Environmental
Protection Agency, Region 4, 61 Forsyth Street SW, Atlanta, Georgia
30303-8960. EPA requests that if at all possible, you contact the
person listed in the FOR FURTHER INFORMATION CONTACT section to
schedule your inspection. The Regional Office's official hours of
business are Monday through Friday 8:30 a.m. to 4:30 p.m., excluding
Federal holidays.
FOR FURTHER INFORMATION CONTACT: Madolyn Sanchez, Air Regulatory
Management Section, Air Planning and Implementation Branch, Air and
Radiation Division, U.S. Environmental Protection Agency, Region 4, 61
Forsyth Street SW, Atlanta, Georgia 30303-8960. Ms. Sanchez may be
reached by phone at (404) 562-9644 or via electronic mail at
[email protected].
SUPPLEMENTARY INFORMATION:
I. What is the background for the actions?
On June 2, 2010, EPA revised the primary SO2 NAAQS,
establishing a new 1-hour SO2 standard of 75 parts per
billion (ppb). See 75 FR 35520 (June 22, 2010). Under EPA's regulations
at 40 CFR part 50, the 2010 1-hour SO2 NAAQS is met at a
monitoring site when the 3-year average of the annual 99th percentile
of daily maximum 1-hour average concentrations is less than or equal to
75 ppb (based on the rounding convention in 40 CFR part 50, appendix
T). See 40 CFR 50.17. Ambient air quality monitoring data for the 3-
year period must meet a data completeness requirement. A year meets
data completeness requirements when all four quarters are complete, and
a quarter is complete when at least 75 percent of the sampling days for
each quarter have complete data. A sampling day has complete data if 75
percent of the hourly concentration values, including state-flagged
data affected by exceptional events which have been approved for
exclusion by the Administrator, are reported.\1\
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\1\ See 40 CFR part 50, appendix T, section 3(b).
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Upon promulgation of a new or revised NAAQS, the Clean Air Act (CAA
or Act) requires EPA to designate as nonattainment any area that does
not meet (or that contributes to ambient air quality in a nearby area
that does not meet) the NAAQS. EPA designated the Hillsborough County
Area as nonattainment for the 2010 1-hour SO2 NAAQS,
effective on October 4, 2013, using 2009-2011 complete, quality
assured, and certified ambient air quality data. See 78 FR 47191
(August 5, 2013). The Hillsborough County Area is comprised of the
portion of Hillsborough County encompassed by the polygon with the
vertices using Universal Traverse Mercator (UTM) coordinates in UTM
zone 17 with datum NAD83 as follows: (1) Vertices-UTM Easting (m)
358581, UTM Northing 3076066; (2) vertices-UTM Easting (m) 355673, UTM
Northing 3079275; (3) UTM Easting (m) 360300, UTM Northing 3086380; (4)
vertices-UTM Easting (m) 366850, UTM Northing 3086692; (5) vertices-UTM
Easting (m) 368364, UTM Northing 3083760; and (6) vertices-UTM Easting
(m) 365708, UTM Northing 3079121. Under the CAA, nonattainment areas
must attain the NAAQS as expeditiously as practicable but not later
than five years after the October 4, 2013, effective date of the
designation. See CAA section 192(a). Therefore, the Hillsborough County
Area's applicable attainment date was no later than October 4, 2018.
EPA's 2010 SO2 nonattainment designation for the Area
triggered an obligation for Florida to develop a nonattainment SIP
revision addressing certain requirements under title I, part D, subpart
1 (hereinafter ``Subpart 1''), and to submit that SIP revision to EPA
in accordance with the deadlines in title I, part D, subpart 5
(hereinafter ``Subpart 5''). Subpart 1 contains the general
requirements for nonattainment areas for criteria pollutants, including
requirements to develop a SIP that provides for the implementation of
reasonably available control measures (RACM), requires reasonable
further progress (RFP), includes base-year and attainment-year
emissions inventories, a SIP-approved nonattainment new source review
(NNSR) permitting program that accounts for growth in the area,
enforceable emission limitations and other such control measures, and
provides for the implementation of contingency measures. This SIP
revision was due within 18 months following the October 4, 2013,
effective date of designation (i.e., April 4, 2015). See CAA section
191(a). Florida submitted a nonattainment SIP revision to EPA on April
3, 2015.
On July 3, 2017 (82 FR 30749), EPA approved Florida's April 3,
2015, SO2 nonattainment SIP revision. This SIP revision
provided a modeled attainment demonstration and satisfied the required
nonattainment planning requirements mentioned above for the
Hillsborough County Area. The revision included a base year emissions
inventory, a modeling demonstration of attainment for the 2010
SO2 NAAQS, RACM/Reasonable Available Control Technology
(RACT), an RFP plan, a NNSR permitting program, and contingency
measures for the Hillsborough County Area.
As part of that action, EPA incorporated into the Florida SIP
specified SO2 emissions caps, compliance monitoring, and
recordkeeping and reporting requirements for emission units at the
Mosaic Fertilizer, LLC Riverview facility (Permit No. 0570008-080-AC,
issued on January 15, 2015) and Big Bend (Permit No. 0570039-074-AC,
issued on February 26, 2015). Florida based its modeled attainment
demonstration, submitted with its April 3, 2015,
[[Page 60929]]
nonattainment SIP revision, on these conditions. Big Bend has four
emission units (EUs 1 through 4), and Big Bend's permit placed an
SO2 emissions cap on all four units at 3,162 pounds per hour
(lb/hr) on a 30-day boiler operating day average. To demonstrate
compliance with the four-unit cap, Permit No. 0570039-074-AC required
each unit to monitor SO2 emissions with a continuous
emission monitoring system (CEMS).
On December 14, 2018, Florida issued a final air construction
permit to Big Bend (Permit No. 0570039-120-AC) that, among other
things, lowers the four-unit emissions cap from 3,162 lb/hr to 2,156
lb/hr; restricts EUs 1 and 2 to only burn natural gas; and since the
amount of sulfur in natural gas is negligible, authorizes the removal
of the SO2 CEMS for EUs 1 and 2 and requires monitoring for
these two units in accordance with the calculation method allowed for
gas-fired acid rain units in 40 CFR part 75 to demonstrate compliance
with the lowered emissions cap.\2\ EUs 1 and 2 share a stack and a flue
gas desulfurization (FGD) system to control SO2. Permit No.
0570039-074-AC required certified CEMS as the method of SO2
emissions monitoring and compliance for EUs 1 and 2. However, with the
restriction on EUs 1 and 2 to burn natural gas in the revised permit,
the new method of monitoring and compliance for EUs 1 and 2 utilizes
the protocol in 40 CFR part 75, Appendix D to determine the hourly
SO2 emission rate from each unit. EUs 3 and 4 continue to
certify compliance with the emissions cap through use of CEMS.
Therefore, Big Bend will demonstrate compliance of the lowered four-
unit emissions cap through a combination of 40 CFR part 75, Appendix D
(EUs 1 and 2) and SO2 CEMS data (EUs 3 and 4). As required
by 40 CFR part 75, Appendix D, section 2.1, Big Bend will measure and
record the hourly flow rate of natural gas combusted by EUs 1 and 2
with an in-line fuel flowmeter. The pounds-per-hour SO2
emission rates for each of these two units will then be calculated by
using the equation provided in 40 CFR part 75, Appendix D, section
3.3.1, along with the measured hourly natural gas flow rate to each
unit and the vendor certified sulfur content of the combusted natural
gas.
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\2\ Florida incorporated the conditions applicable to Big Bend
from Permit No. 0570039-120-AC into the facility's Title V operating
permit on February 8, 2019.
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On June 7, 2018,\3\ Florida submitted a request to EPA to
redesignate the Hillsborough County Area to attainment for the 2010 1-
hour SO2 NAAQS and a related SIP revision containing a
maintenance plan for the Area. On April 16, 2019, FDEP submitted a
revision to the June 7, 2018, redesignation request and SIP revision
asking EPA to incorporate into the SIP certain permit conditions
established in Permit No. 0570039-120-AC.\4\ As noted below, some of
these conditions replace conditions that EPA incorporated into the SIP
from Permit No. 0570039-074-AC in the Agency's July 3, 2017 action
approving the State's nonattainment SIP. The conditions identified for
incorporation into the SIP from Permit No. 0570039-120-AC are: (1)
Section 2, Condition 4 (new)--describing the 40 CFR part 75, Appendix D
monitoring methodology and compliance requirements for EUs 1 and 2; (2)
the ``SO2 Emissions Cap'' provision from Section 3,
Condition 4 (replacement)--setting a four-unit emissions cap of 2,156
lb/hr averaged over a 30-day boiler operating day, requiring that EUs 1
and 2 demonstrate compliance with the cap by monitoring natural gas
fuel flow and following the procedures in Appendix D to 40 CFR 75 to
determine SO2 mass emissions, and requiring that EUs 3 and 4
demonstrate compliance with the cap through CEMS; (3) the
``SO2 CEMS'' provision from Section 3, Condition 4
(replacement)--requiring EUs 3 and 4 to use CEMS to demonstrate
compliance with the cap and to meet the quality assurance and quality
control requirements outlined in the facility's title V permit; and (4)
the ``Methods of Operation'' for Units 1 and 2 provision from Section
3, Condition 6 (new)--restricting EUs 1 and 2 to burning only natural
gas from a federally regulated pipeline. In a notice of proposed
rulemaking (NPRM) published on July 31, 2019 (84 FR 37173), EPA
proposed to determine that the Area attained the 2010 1-hour
SO2 NAAQS by its attainment date of October 4, 2018; to
approve the maintenance plan for the Area as meeting the maintenance
plan requirements of CAA section 175A and to incorporate it into the
SIP; to approve Florida's request for redesignation of the Area from
nonattainment to attainment for the 2010 1-hour SO2 NAAQS as
meeting the redesignation requirements of CAA section 107(d)(3)(E); and
to incorporate into the SIP the aforementioned permitting conditions
applicable to Big Bend. No comments were received on the July 31, 2019,
proposed rulemaking. The details of Florida's submittal and the
rationale for EPA's actions are further explained in the NPRM,
including the modeled attainment demonstration and consideration of
SO2 ambient air monitoring data trends in the area to
determine attainment with the 2010 1-hour SO2 NAAQS.
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\3\ The June 7, 2018, submission was received by EPA on June 12,
2018.
\4\ The April 19. 2019, submission was received by EPA on April
25, 2019.
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II. What are the effects of these actions?
Approval of the redesignation request changes the legal designation
of the Hillsborough County Area, found at 40 CFR 81.310, from
nonattainment to attainment for the 2010 1-hour SO2 NAAQS.
Approval of Florida's associated SIP revision also incorporates a plan
into the SIP for maintaining the 2010 1-hour SO2 NAAQS in
the Hillsborough County Area as described in the NPRM. The CAA section
175A maintenance plan also establishes contingency measures to remedy
any future violations of the 2010 1-hour SO2 NAAQS and
procedures for evaluation of potential violations. The Area is required
to implement this maintenance plan and the prevention of significant
deterioration program for the 2010 1-hour SO2 NAAQS. The
approved maintenance plan can only be revised if the revision meets the
requirements of CAA section 110(l) and, if applicable, CAA section 193.
Approval of the SIP revision also incorporates into the SIP certain
permitting conditions applicable to Big Bend, making them permanent and
federally enforceable.
III. Incorporation by Reference
In this rule, EPA is finalizing regulatory text that includes
incorporation by reference. In accordance with requirements of 1 CFR
51.5, EPA is finalizing the incorporation by reference into Florida's
SIP the following conditions from Air Permit No. 0570039-120-AC issued
by FDEP to Big Bend with an effective date of December 14, 2018,
related to an SO2 emissions cap and fuel restriction at the
facility and associated compliance monitoring, recordkeeping, and
reporting requirements: \5\ (1) Section 2, Condition 4; (2) the
``SO2 Emissions Cap'' provision from Section 3, Condition 4;
\6\ (3) the ``SO2 CEMS''
[[Page 60930]]
provision from Section 3, Condition 4; \7\ and (4) the ``Methods of
Operation'' for Units 1 and 2 provision from Section 3, Condition 6.\8\
Therefore, these material have been approved by EPA for inclusion in
the state implementation plan, have been incorporated by reference by
EPA into that plan, are fully federally enforceable under sections 110
and 113 of the CAA as of the effective date of the final rulemaking of
EPA's approval, and will be incorporated by reference in the next
update to the SIP compilation.\9\
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\5\ For additional information regarding these permit
conditions, see Section I, above, and Section V of the NPRM.
\6\ In its April 16, 2019, submittal, Florida identifies this
provision as ``Section 3, Subsection B, Specific Condition 2'';
however, it is contained under the heading ``4. Permit Being
Modified: Permit No. 0570039-096-AC'' in Section 3 of Permit No.
0570039-120-AC. See Section V of the NPRM for additional
information.
\7\ In its April 16, 2019, submittal, Florida identifies this
provision as ``Section 3, Subsection B, Specific Condition 3;
however, it is contained under the heading ``4. Permit Being
Modified: Permit No. 0570039-096-AC'' in Section 3 of Permit No.
0570039-120-AC. See Section V of the NPRM for additional
information.
\8\ In its April 16, 2019, submittal, Florida identifies this
provision as ``Section 3, Subsection A, Specific Condition 3a;
however, it is contained under the heading ``6. Permits Being
Modified: Permit Nos. 0570039-066-AC & 109-AC'' in Section 3 of
Permit No. 0570039-120-AC. See Section V of the NPRM for additional
information.
\9\ See 62 FR 27968 (May 22, 1997).
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EPA has made, and will continue to make, these materials generally
available through www.regulations.gov and at the EPA Region 4 Office
(please contact the person identified in the FOR FURTHER INFORMATION
CONTACT section of this preamble for more information).
IV. Final Action
EPA is taking final actions regarding Florida's request to
redesignate the Hillsborough County Area to attainment for the 2010 1-
hour SO2 NAAQS and associated SIP revision. EPA is
determining that the Hillsborough County Area attained the 2010 1-hour
SO2 NAAQS by its applicable attainment date of October 4,
2018. EPA is also approving the SIP revision containing the State's
plan for maintaining attainment of the 2010 1-hour SO2
standard and incorporating the maintenance plan into the SIP. EPA is
approving Florida's redesignation request and redesignating the
Hillsborough County Area to attainment for the 2010 1-hour
SO2 NAAQS. Finally, EPA is incorporating the aforementioned
permit conditions for Big Bend into the SIP. As mentioned above,
approval of the redesignation request changes the official designation
of the Hillsborough County Area from nonattainment to attainment, as
found in 40 CFR part 81.
IV. Statutory and Executive Order Reviews
Under the CAA, redesignation of an area to attainment and the
accompanying approval of a maintenance plan under section 107(d)(3)(E)
are actions that affect the status of a geographical area and do not
impose any additional regulatory requirements on sources beyond those
imposed by state law. A redesignation to attainment does not in and of
itself create any new requirements, but rather results in the
applicability of requirements contained in the CAA for areas that have
been redesignated to attainment. Moreover, the Administrator is
required to approve a SIP submission that complies with the provisions
of the Act and applicable Federal regulations. See 42 U.S.C. 7410(k);
40 CFR 52.02(a). Thus, in reviewing SIP submissions, EPA's role is to
approve state choices, provided that they meet the criteria of the CAA.
Accordingly, these actions merely approve state law as meeting Federal
requirements and do not impose additional requirements beyond those
imposed by state law. For this reason, these actions:
Are not significant regulatory actions subject to review
by the Office of Management and Budget under Executive Orders 12866 (58
FR 51735, October 4, 1993) and 13563 (76 FR 3821, January 21, 2011);
Are not Executive Order 13771 (82 FR 9339, February 2,
2017) regulatory actions because redesignations and SIP approvals are
exempted under Executive Order 12866;
Do not impose information collection burdens under the
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
Are certified as not having a significant economic impact
on a substantial number of small entities under the Regulatory
Flexibility Act (5 U.S.C. 601 et seq.);
Do not contain any unfunded mandate or significantly or
uniquely affect small governments, as described in the Unfunded
Mandates Reform Act of 1995 (Pub. L. 104-4);
Do not have Federalism implications as specified in
Executive Order 13132 (64 FR 43255, August 10, 1999);
Are not economically significant regulatory actions based
on health or safety risks subject to Executive Order 13045 (62 FR
19885, April 23, 1997);
Are not significant regulatory actions subject to
Executive Order 13211 (66 FR 28355, May 22, 2001);
Are not subject to requirements of Section 12(d) of the
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272
note) because application of those requirements would be inconsistent
with the CAA; and
Will not have disproportionate human health or
environmental effects under Executive Order 12898 (59 FR 7629, February
16, 1994).
These actions are not approved to apply on any Indian reservation
land or in any other area where EPA or an Indian tribe has demonstrated
that a tribe has jurisdiction. In those areas of Indian country, the
rule does not have tribal implications as specified by Executive Order
13175 (65 FR 67249, November 9, 2000), nor will it impose substantial
direct costs on tribal governments or preempt tribal law.
The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the
Small Business Regulatory Enforcement Fairness Act of 1996, generally
provides that before a rule may take effect, the agency promulgating
the rule must submit a rule report, which includes a copy of the rule,
to each House of the Congress and to the Comptroller General of the
United States. EPA will submit a report containing this action and
other required information to the U.S. Senate, the U.S. House of
Representatives, and the Comptroller General of the United States prior
to publication of the rule in the Federal Register. A major rule cannot
take effect until 60 days after it is published in the Federal
Register. This action is not a ``major rule'' as defined by 5 U.S.C.
804(2).
Under section 307(b)(1) of the CAA, petitions for judicial review
of this action must be filed in the United States Court of Appeals for
the appropriate circuit by January 13, 2020. Filing a petition for
reconsideration by the Administrator of this final rule does not affect
the finality of this action for the purposes of judicial review nor
does it extend the time within which a petition for judicial review may
be filed and shall not postpone the effectiveness of such rule or
action. This action may not be challenged later in proceedings to
enforce its requirements. See section 307(b)(2).
List of Subjects
40 CFR Part 52
Environmental protection, Air pollution control, Incorporation by
reference, Intergovernmental relations, Sulfur dioxide, Reporting and
recordkeeping requirements.
40 CFR Part 81
Environmental protection, Air pollution control.
Dated: October 10, 2019.
Mary S. Walker,
Regional Administrator, Region 4.
40 CFR parts 52 and 81 are amended as follows:
[[Page 60931]]
PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
0
1. The authority citation for part 52 continues to read as follows:
Authority: 42 U.S.C. 7401 et seq.
Subpart K--Florida
0
2. Section 52.520 is amended by:
0
a. In paragraph (d), revising the entry for ``Tampa Electric Company--
Big Bend Station'' Air Permit No. 0570039-074-AC,
0
b. In paragraph (d), adding a new entry for ``Tampa Electric Company--
Big Bend Station'' at the end of the table, and
0
c. In paragraph (e), adding a new entry for ``2010 1-hour
SO2 Maintenance Plan for the Hillsborough Area'' at the end
of the table to read as follows.
Sec. 52.520 Identification of plan.
* * * * *
(d) * * *
EPA-Approved Florida Source-Specific Requirements
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State
Name of source Permit No. effective date EPA approval date Explanation
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* * * * * * *
Tampa Electric Company-Big Bend Air Permit No. 2/26/2015 7/3/2017, 82 FR Only Section 3,
Station. 0570039-074-AC. 30749. Subsection B,
Condition 5.
* * * * * * *
Tampa Electric Company-Big Bend Air Permit No. 12/14/2018 11/12/2019 [Insert Only Section 2,
Station. 0570039-120-AC. citation of Condition 4; the ``SO2
publication]. Emissions Cap''
provision from Section
3, Condition 4; the
``SO2 CEMS'' provision
from Section 3,
Condition 4; and the
``Methods of
Operation'' for Units
1 and 2 provision from
Section 3, Condition
6.
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(e) ``
EPA-Approved Florida Non-Regulatory Provisions
----------------------------------------------------------------------------------------------------------------
State EPA approval Federal Register,
Provision effective date date notice Explanation
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* * * * * * *
2010 1-hour SO2 Maintenance Plan 6/7/2018 11/12/2019 [Insert citation of
for the Hillsborough Area. publication].
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PART 81--DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES
0
3. The authority citation for part 81 continues to read as follows:
Authority: 42 U.S.C. 7401 et seq.
0
4. In Sec. 81.310, the table entitled ``Florida-2010 Sulfur Dioxide
NAAQS (Primary)'' is amended by revising the entry for ``Hillsborough
County, FL'' to read as follows:
Sec. 81.310 Florida.
* * * * *
Florida-2010 Sulfur Dioxide NAAQS (Primary)
------------------------------------------------------------------------
Designation
Designated area -------------------------------
Date \1\ Type
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Hillsborough County, FL \2\............. 12/12/2019 Attainment
Hillsborough County (part)..........
That portion of Hillsborough
County encompassed by the
polygon with the vertices using
Universal Traverse Mercator
(UTM) coordinates in UTM zone
17 with datum NAD83 as follows:
(1) Vertices-UTM Easting (m)
358581, UTM Northing 3076066;
(2) vertices-UTM Easting (m)
355673, UTM Northing 3079275;
(3) UTM Easting (m) 360300, UTM
Northing 3086380; (4) vertices-
UTM Easting (m) 366850, UTM
Northing 3086692; (5) vertices-
UTM Easting (m) 368364, UTM
Northing 3083760; and (6)
vertices-UTM Easting (m)
365708, UTM Northing 3079121...
* * * * * * *
------------------------------------------------------------------------
\1\ This date is 4/9/2018, unless otherwise noted.
\2\ Excludes Indian country located in each area, if any, unless
otherwise specified.
\3\ Includes any Indian country in each county or area, unless otherwise
specified. The EPA is not determining the boundaries of any area of
Indian country in this table, including any area of Indian country
located in the larger designation area. The inclusion of any Indian
country in the designation area is not a determination that the state
has regulatory authority under the Clean Air Act for such Indian
country.
* * * * *
[FR Doc. 2019-23375 Filed 11-8-19; 8:45 am]
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