83 FR 40728 - Air Plan Approval; State of Iowa; Attainment Redesignation for 2008 Lead NAAQS and Associated Maintenance Plan

ENVIRONMENTAL PROTECTION AGENCY

Federal Register Volume 83, Issue 159 (August 16, 2018)

The Environmental Protection Agency (EPA) is proposing to take action to approve the State of Iowa's request to redesignate portions of Pottawattamie County, Council Bluffs, Iowa to attainment for the 2008 lead (Pb) National Ambient Air Quality Standards (NAAQS). EPA's proposed approval of the redesignation request is based on the determination that the Council Bluffs area has met the criteria for redesignation to attainment set forth in the Clean Air Act (CAA), including the determination that the area has attained the standard. Additionally, EPA is approving the state's plan for maintaining the 2008 Pb NAAQS in the Council Bluffs area for ten years beyond redesignation.

[Federal Register Volume 83, Number 159 (Thursday, August 16, 2018)]
[Proposed Rules]
[Pages 40728-40732]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-17583]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[EPA-R07-OAR-2018-0532; FRL-9982-27--Region 7]


Air Plan Approval; State of Iowa; Attainment Redesignation for 
2008 Lead NAAQS and Associated Maintenance Plan

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to take 
action to approve the State of Iowa's request to redesignate portions 
of Pottawattamie County, Council Bluffs, Iowa to attainment for the 
2008 lead (Pb) National Ambient Air Quality Standards (NAAQS). EPA's 
proposed approval of the redesignation request is based on the 
determination that the Council Bluffs area has met the criteria for 
redesignation to attainment set forth in the Clean Air Act (CAA), 
including the determination that the area has attained the standard. 
Additionally, EPA is approving the state's plan for maintaining the 
2008 Pb NAAQS in the Council Bluffs area for ten years beyond 
redesignation.

DATES: Comments must be received on or before September 17, 2018.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R07-
OAR-2018-0532 to https://www.regulations.gov. Follow the online 
instructions for submitting comments. Once submitted, comments cannot 
be edited or removed from Regulations.gov. The EPA may publish any 
comment received to its public docket. Do not submit electronically any 
information you consider to be Confidential Business Information (CBI) 
or other information whose disclosure is restricted by statute. 
Multimedia submissions (audio, video, etc.) must be accompanied by a 
written comment. The written comment is considered the official comment 
and should include discussion of all points you wish to make. The EPA 
will generally not consider comments or comment contents located 
outside of the primary submission (i.e., on the web, cloud, or other 
file sharing system). For additional submission methods, the full EPA 
public comment policy, information about CBI or multimedia submissions, 
and general guidance on making effective comments, please visit https://www2.epa.gov/dockets/commenting-epa-dockets.

FOR FURTHER INFORMATION CONTACT: Ms. Stephanie Doolan, Environmental 
Protection Agency, Air Planning and Development Branch, 11201 Renner 
Boulevard, Lenexa, KS 66219 at (913) 551-7719 or by email at 
[email protected].

SUPPLEMENTARY INFORMATION: Throughout this document ``we,'' ``us,'' and 
``our'' refer to EPA. This section provides additional information by 
addressing the following:

I. What action is EPA proposing to take?
II. Background for EPA's Proposed Action
III. EPA's Analysis of the State's Request
    A. Criteria (1)--The Area Has Attained the 2008 Pb NAAQS
    B. Criteria (2)--The Area Has a Fully Approved SIP Under Section 
110(k)
    C. Criteria (3)--The Air Quality Improvement is Due to Permanent 
and Enforceable Reductions in Emissions Resulting From 
Implementation of the Applicable SIP and Applicable Federal Air 
Pollutant Control Regulations and Other Permanent and Enforceable 
Reductions
    D. Criteria (4)--the Administrator Has Fully Approved a 
Maintenance Plan for the Area as Meeting the Requirements of Section 
175A
    1. Emissions Inventory
    2. Maintenance Demonstration
    3. Monitoring Network
    4. Verification of Continued Attainment
    5. Contingency Plan
    E. Criteria (5)--The Area Has Met All Applicable Requirements 
Under Section 110 and Part D
IV. Summary of Proposed Action
V. Statutory and Executive Order Reviews

I. What action is EPA proposing to take?

    EPA is proposing to approve Iowa's request to redesignate the 
Council Bluffs area to attainment for the 2008 Pb NAAQS. On September 
18, 2017, the state submitted a request for redesignation that 
demonstrates NAAQS attainment and an associated maintenance plan to 
ensure that the area continues to attain the standard. Based on its 
review of the state's submittal which is described in detail in the 
following sections, EPA proposes to approve the redesignation request 
for the area and associated maintenance plan.

II. Background for EPA's Proposed Action

    On October 15, 2008, EPA promulgated a revision to the Pb NAAQS, 
lowering the standard from 1.5 micrograms per cubic meter ([micro]g/
m\3\) to 0.15 [micro]g/m\3\ (73 FR 66963). The state began air 
monitoring for Pb on November 3, 2009, at a source-oriented monitor in 
the Council Bluffs area near the Griffin Pipe Products Company, LLC

[[Page 40729]]

(Griffin Pipe) facility. The 2010 through 2012 design value for Pb at 
the monitor was 0.26 [micro]g/m\3\, violating the 2008 Pb NAAQS.
    Effective December 31, 2011, EPA designated a portion of 
Pottawattamie County, Council Bluffs, Iowa, as nonattainment for the 
2008 Pb NAAQS (76 FR 72097). On February 3, 2015, the Iowa Department 
of Natural Resources (IDNR) submitted a plan to bring the area back 
into attainment of the standard. EPA approved the state's SIP revision 
in a Federal Register notice dated February 26, 2016 (81 FR 9770). The 
area attained the 2008 Pb NAAQS by the statutory deadline of December 
31, 2016. The 2014 through 2016 design value for the area is 0.10 
[micro]g/m\3\.
    The mechanisms to enforce the attainment SIP revision are an 
Administrative Consent Order between Griffin Pipe and the state, and an 
air construction permit issued to Alter Metal Recycling, the adjacent 
facility that provided scrap metal to Griffin Pipe. On May 3, 2014, 
Griffin Pipe ceased operations. The approved attainment SIP revision 
includes two operational strategies for Griffin Pipe, options A and B. 
Under option A, the facility resumes operations with operational 
control measures to limit emissions. Option B provides for the 
permitting and installation of a baghouse to control emissions and less 
operating restrictions. To date, Griffin Pipe has not resumed 
operations of its Council Bluffs facility, but the emissions controls 
for either option to resume manufacturing are permanent and 
enforceable.
    Alter Metal Recycling continues to operate its facility under an 
air construction permit which contains a Reasonably Available Control 
Technology (RACT) limit and work practice standards in the form of 
paving and sweeping cleaning haul routes with a HEPA vacuum street 
sweeper. Also, Alter's construction permit contains limitations on 
truck traffic and total materials shipped are not to exceed 946,000 
tons per rolling twelve-month period. In its construction permit, Alter 
is required to conduct silt sampling on haul routes internal to the 
facility boundaries at three locations to demonstrate that the silt 
content on roadways is less than 2.70 g/m\2\. The facility is not 
required to sweep if there has been 0.2 inches of rain within a twenty-
four-hour period, the haul routes have not been used that day, or the 
weather is too hazardous to conduct sweeping (e.g., ice or snow). 
Alter's permit restricts truck traffic speeds on internal haul routes 
to twenty miles per hour. Recordkeeping to document haul route sweeping 
and weather conditions if sweeping is not conducted is required to be 
maintained for two years.

III. EPA's Analysis of the State's Request

    The CAA provides the requirements for redesignating a nonattainment 
area to attainment. Specifically, section 107(d)(3)(E) of the CAA 
allows for redesignation provided the following criteria are met: (1) 
The Administrator determines that the area has attained the applicable 
NAAQS; (2) the Administrator has fully approved the applicable 
implementation plan for the area under section 110(k); (3) the 
improvement in air quality is due to permanent and enforceable 
reductions in emissions resulting from implementation of the applicable 
SIP and applicable Federal air pollutant control regulations and other 
permanent and enforceable reductions; (4) the Administrator has fully 
approved a maintenance plan for the area as meeting the requirements of 
section 175A; and (5) the state containing such area has met all 
requirements applicable to the area under section 110 and part D of 
title I of the CAA.

A. Criteria (1)--The Area Has Attained the 2008 Pb NAAQS

    For designating a nonattainment area to attainment, the CAA 
requires EPA to determine that the area has attained the applicable 
NAAQS (CAA section 107(d)(3)(E)(i)). EPA is proposing to determine that 
the portions of Pottawattamie County, Council Bluffs, Iowa, that 
previously violated the 2008 Pb NAAQS are now attaining it.
    According to 40 CFR part 50, appendix R, the 2008 Pb NAAQS is met 
at a monitoring site when the identified design value is valid and is 
less than or equal to 0.15 [micro]g/m\3\. The form of the standard is 
based on the maximum three-month rolling average over a three-year 
period (thirty-six rolling calendar quarters, or thirty-eight total 
months). The design value is the highest Pb concentration recorded for 
a rolling three-month calendar quarter over a three-year period. The 
area has not recorded a Pb value at the air monitor greater than 0.15 
[micro]g/m\3\ during any rolling three-month calendar quarter since 
December 2012. As discussed above, the 2014 through 2016 design value, 
which is the three-year period for which valid data are available at 
this time, is 0.10 [micro]g/m\3\.

B. Criteria (2)--The Area Has a Fully Approved SIP Under Section 110(k)

    As discussed above, EPA approved the state's SIP revision in a 
Federal Register rulemaking dated February 26, 2016 (81 FR 9770). EPA 
believes that the state has met all of the requirements for approval of 
the state's attainment SIP revision. The requirements of the attainment 
SIP revision remain fully enforceable, including contingency measures 
in the event that the air monitor would record a future violation for 
the area.

C. Criteria (3)--The Air Quality Improvement Is Due to Permanent and 
Enforceable Reductions in Emissions Resulting From Implementation of 
the Applicable SIP and Applicable Federal Air Pollutant Control 
Regulations and Other Permanent and Enforceable Reductions

    For redesignating a nonattainment area to attainment, section 
107(d)(3)(E)(iii) of the CAA requires EPA to determine that the air 
quality improvement in the area is due to permanent and enforceable 
reduction in emissions resulting from implementation of the SIP and 
applicable Federal air pollution control regulations and other 
permanent and enforceable reductions. EPA proposes to find that Iowa 
has demonstrated that the observed air quality improvement in the 
Council Bluffs area is due to permanent and enforceable reductions in 
emissions resulting from implementation of the SIP.
    The Council Bluffs Pb nonattainment SIP included an Administrative 
Consent Order between IDNR and Griffin Pipe dated January 29, 2015, and 
an air construction permit for Alter Metal Recycling dated September 2, 
2014. Griffin Pipe is no longer operating at its Council Bluffs 
facility, which reduces the amount of Pb measured at the air monitor. 
In both scenarios, options A or B, under which Griffin Pipe may resume 
operations, there are emissions limitations and work practice controls 
that are expected to maintain NAAQS attainment. Both scenarios include 
haul road sweeping and cleaning, implementation of a scrap management 
plan to minimize the amount of Pb materials introduced to the melting 
process, and the use of Best Management Practices to control fugitive 
dust. The major difference between the two options is that option A 
employs more stringent production limits to control emissions; whereas, 
option B allows for greater production, but requires the facility to 
install a baghouse for greater emissions control. IDNR modeled both 
options and both demonstrate attainment of the standard. Thus, despite 
the uncertainty of whether Griffin Pipe will resume operations, EPA 
believes that the

[[Page 40730]]

emissions reductions imposed by the approved SIP revision will continue 
to be permanent and enforceable.
    With regard to Alter Metal Recycling, the fugitive dust re-
entrained by traffic along the haul routes within the facility is 
controlled by an air construction permit. The construction permit 
requires, among other things, paving of haul routes for truck traffic 
within the facility boundaries, limits on the hours of operation, a 
posted speed limit of twenty miles per hour to control re-entrainment 
of dust, and work practice standards that include sweeping haul routes 
using a HEPA filter vacuum truck. EPA believes that Alter's air 
construction permit provides permanent and enforceable controls on 
fugitive Pb dust emissions.

D. Criteria (4)--The Administrator Has Fully Approved a Maintenance 
Plan for the Area as Meeting the Requirements of Section 175A

    In conjunction with its redesignation request submitted to EPA on 
September 18, 2017, IDNR also submitted a maintenance plan to provide 
for the ongoing attainment of the 2008 Pb NAAQS for at least ten years 
following the effective date of approval of the redesignation SIP 
revision. EPA believes the maintenance plan meets the requirements of 
section 175A of the CAA. Section 175A of the CAA establishes 
requirements for maintenance plans for seeking redesignation from 
nonattainment to attainment. EPA's interpretation of section 175A is 
contained in a September 4, 1992, Memorandum from John Calcagni, 
Director (at that time), Air Quality Management Division, to the 
directors of the air programs in the ten EPA regions. The Calcagni 
Memorandum provides guidance on the content of a maintenance plan, 
explaining that it should address five requirements: (1) An emissions 
inventory; (2) a maintenance demonstration; (3) an air quality 
monitoring commitment; (4); verification of continued attainment; and 
(5) a contingency plan. The following provides a discussion of how EPA 
believes the state's maintenance plan meets the requirements of 175A.
1. Emissions Inventory
    The state is required to develop an inventory of actual emissions 
to identify the level of emissions sufficient to attain the NAAQS. 
Since Griffin Pipe is currently idled, IDNR provided an analysis of 
potential to emit (PTE) rather than actual emissions, because it 
believes the actuals are an underestimation. For Griffin Pipe, IDNR 
estimates PTE to be 0.254 tpy for option A and 0.392 tpy for option B 
based on the allowable emissions in the Administrative Consent Order. 
For Alter Metal Recycling, IDNR estimates that its current PTE is 0.61 
tpy based on the allowable emissions in its air construction permit. 
EPA believes the state has satisfied the requirement to develop an 
attainment inventory.
2. Maintenance Demonstration
    The state may generally demonstrate maintenance of the 0.15 ug/m\3\ 
standard by either showing that future Pb emissions will not exceed the 
level of the attainment inventory, or by modeling to show that the 
future mix of sources and emission rates will not cause a violation of 
the 2008 Pb NAAQS. The demonstration should be for a period of ten 
years following the redesignation, e.g., until 2028 for the maintenance 
plan update.
    The state demonstrates attainment of the standard using the 
attainment inventory since it is based on maximum permitted allowable 
emissions and Pb emissions are not expected to increase over the 
maintenance period. Further, IDNR relied on the attainment plan 
modeling submitted in 2015 as a part of the EPA approved SIP. 
Dispersion modeling is a more sophisticated means of demonstrating 
maintenance because it incorporates meteorology, topography, and source 
characteristics in addition to permitted allowable emissions rates. The 
attainment demonstration modeling followed current EPA guidance, used 
the EPA-approved modeling software, AERMOD, and maximum permitted 
emissions rates. No significant changes in modeling inputs have 
occurred since its submittal and none are anticipated through the 
maintenance period. Therefore, EPA finds that the state has 
demonstrated that Iowa has demonstrated maintenance of the 2008 Pb 
NAAQS.
3. Monitoring Network
    Once an area has been redesignated, the state has committed in its 
Redesignation Request and Maintenance Plan for the Pb Nonattainment 
Area in Council Bluffs, Iowa, that it will continue to operate the air 
quality monitor (site ID 19-155-0011) in accordance with 40 CFR part 
58. Air modeling has shown this monitoring location to be in the 
predicted area of maximum impact from fugitive emissions from both 
Griffin Pipe and Alter Metal Recycling. Thus, this air monitoring 
location continues to be acceptable for verifying continued NAAQS 
attainment. The state will continue to operate a Pb monitor at this 
location for a minimum of ten years. As required by section 175A, eight 
years following redesignation, the state shall submit an additional 
maintenance plan. The Pb monitoring network will be revisited at that 
time.
4. Verification of Continued Attainment
    The state has the legal authority to enforce and implement the 
requirements of Administrative Consent Order for Griffin Pipe and the 
construction permit for Alter Metal Recycling to ensure ongoing 
attainment of the 2008 Pb NAAQS. These SIP-approved documents contain 
the permanent and enforceable measures for controlling Pb emissions. 
Should another source of Pb emissions to air seek a permit in the area 
to construct a new source or modify an existing one, the state will 
evaluate on a case-by-case basis the potential impacts to air quality 
and NAAQS attainment. State law also gives IDNR the ability to 
establish more stringent emissions standards and/or the ability to 
require the installation of additional control equipment to ensure the 
attainment or maintenance of the NAAQS.
    The state commits in its maintenance plan to continue to operate 
its Pb monitoring site to verify the attainment status of the area and 
will continue to follow the air monitoring network review process, as 
required by 40 CFR part 58, to determine the adequacy of the Pb 
monitoring network when monitoring may be discontinued.
5. Contingency Plan
    Section 175A(d) of the CAA requires that a maintenance plan include 
contingency provisions, as necessary, to promptly correct any violation 
of the NAAQS that occurs after redesignation to attainment. The state 
has established a trigger that will initiate a timely response to 
indications of a possible future violation of the 2008 Pb NAAQS: It 
will evaluate the need for additional control measures if any three-
month rolling average concentration of 0.14 ug/m\3\(approximately 95 
percent of the standard) or greater is measured at the ambient air 
monitor. The state will require that any necessary measures be 
implemented as expeditiously as practicable. IDNR has the authority 
(Iowa Code 455B.134) to issue orders consistent with rules to cause the 
abatement or control of air pollution to ensure that the NAAQS are not 
violated. The approach of using a trigger at approximately 95 percent 
of the standard is expected, along with the previously approved SIP 
control measures, to ensure maintenance of the standard.

[[Page 40731]]

    Contingency measures in the approved attainment SIP revision dated 
February 26, 2016 (81 FR 9770) remain available and enforceable. If a 
NAAQS violation occurs after redesignation, at a minimum the IDNR will 
require the implementation of all measures, including the contingency 
measures, contained in the nonattainment plan for the area prior to the 
redesignation of the area to attainment. The nonattainment plan 
contingency measures for Griffin Pipe are specified in conditions A-5, 
paragraph O, and B-5, paragraph O, of the Administrative Order on 
Consent (2015-AQ-02). The contingency measures for Alter Metal 
Recycling are specific in condition 14.L of its air construction permit 
(14-A-521). These contingency measures include, for example, additional 
haul road sweeping/cleaning requirements.
    The state also has the authority to request or conduct new or 
supplemental reviews of Pb emissions from sources and activities 
affecting the nonattainment area. Contingency measures may include 
improvements to permitted control devices, or improvements to work 
practice standards, such as additional haul route sweeping. Once 
determined, the state will submit to EPA an analysis to demonstrate 
that the proposed measures are adequate to return the area to 
attainment.

E. Criteria (5)--The Area Has Met All Applicable Requirements Under 
Section 110 and Part D

    Section 110(a)(2) of title I of the CAA delineates the general 
requirements for a SIP, which include enforceable emissions limitations 
and other control measures, means, or techniques; provisions for the 
establishment and operation of appropriate devices necessary to collect 
data on ambient air quality; and programs to enforce the limitations. 
These requirements include, but are not limited to, the following: (1) 
Submittal of a SIP that has been adopted by the state after reasonable 
public notice and hearing; (2) provisions for establishment and 
operation of appropriate procedures needed to monitor ambient air 
quality; (3) implementation of a source permit program and provisions 
for the implementation of a Prevention of Significant Deterioration 
(PSD) program; (4) provisions for the implementation of Nonattainment 
New Source Review (NSR); (5) provisions for air pollution modeling; and 
(6) provisions for public and local agency participation in planning 
and emission control rule development.
    The requirements for the area to have enforceable emissions 
limitations and other control measures as well as an appropriate air 
monitoring program for collecting air quality data were met in the 
approved attainment SIP revision dated February 26, 2016 (81 FR 9770). 
As ambient air monitoring data demonstrate, the means and methods of 
the attainment SIP revision have been successful in restoring air 
quality to attainment with the NAAQS.
    The other requirements of section 110(a)(2) pertain to the 
administration of the state program to ensure the effectiveness of its 
overall air quality management program. The adequacy of the remaining 
elements of section 110(a)(2) including the state's PSD and 
Nonattainment NSR programs, its ability to conduct air modeling and 
provisions for public participation in air planning are addressed in 
EPA's November 14, 2015 final approval of the state's infrastructure 
SIP revision (80 FR 48791). In EPA's final approval of the state's 
infrastructure SIP revision for the 2008 Pb NAAQS, program elements 
necessary to ensure the enforcement and maintenance of air quality 
standards were determined to be adequate to meet the requirements of 
section 110(a)(2).
    Finally, section 107(d)(3)(E)(v) requires that the redesignation 
plan meet the requirements of part D. Section 172(c)identifies key 
provisions that states must address in a nonattainment SIP, including: 
(1) Provisions for attainment and the timely implementation of all 
reasonably available control technology (RACT) and reasonably available 
control measures (RACM); (2) reasonable further progress (RFP); (3) an 
emissions inventory for the nonattainment area; (4) Nonattainment NSR; 
(5) a control strategy with enforceable limits and schedules and 
timetables for compliance; and (6) contingency measures.
    The approved attainment SIP revision dated February 26, 2016 (81 FR 
9770) contains legally enforceable control measures and includes an 
evaluation of how those measures meet RACT and RACM. The approved 
attainment SIP also included a plan for making RFP. All of the 
contingency measures in the approved attainment SIP revision are 
available and enforceable for use, if necessary. An emissions inventory 
is included in the attainment SIP revision and this inventory is 
updated in the Redesignation Request and Maintenance Plan as discussed 
in paragraph III, criteria 4 a. above. The state's Nonattainment NSR is 
approved in the infrastructure SIP revision (80 FR 48791).

IV. Summary of Proposed Action

    EPA is proposing to approve Iowa's request to redesignate the 
Council Bluffs area to attainment for the 2008 Pb NAAQS. Based on its 
detailed analysis above, EPA believes that the state's September 18, 
2017, request for redesignation demonstrates NAAQS attainment and the 
associated maintenance plan will ensure that the area continues to 
attain the standard. Thus, EPA proposes to approve the redesignation 
request for the area and associated maintenance plan.

V. Statutory and Executive Order Reviews

    Under the CAA, the Administrator is required to approve a SIP 
submission that complies with the provisions of the Act and applicable 
Federal regulations. 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, this 
action merely approves state law as meeting Federal requirements and 
does not impose additional requirements beyond those imposed by state 
law. For that reason, this action:
     Is not a significant regulatory action 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);
     Is not an Executive Order 13771 (82 FR 9339, February 2, 
2017) regulatory action because SIP approvals are exempted under 
Executive Order 12866.
     Does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     Is 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.);
     Does 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);
     Does not have Federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Is not an economically significant regulatory action based 
on health or safety risks subject to Executive Order 13045 (62 FR 
19885, April 23, 1997);
     Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001);
     Is not subject to requirements of the National Technology 
Transfer and

[[Page 40732]]

Advancement Act (NTTA) because this rulemaking does not involve 
technical standards; and
     Does not provide EPA with the discretionary authority to 
address, as appropriate, disproportionate human health or environmental 
effects, using practicable and legally permissible methods, under 
Executive Order 12898 (59 FR 7629, February 16, 1994).
    The SIP is 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 and will not impose substantial direct 
costs on tribal governments or preempt tribal law as specified by 
Executive Order 13175 (65 FR 67249, November 9, 2000).

 List of Subjects

40 CFR Part 52

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

40 CFR Part 81

    Environmental protection, Air pollution control.

    Dated: August 3, 2018.
James B. Gulliford,
Regional Administrator, Region 7.

    For the reasons stated in the preamble, EPA proposes to amend 40 
CFR parts 52 and 81 as set forth below:

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 Q--Iowa

0
2. In Sec.  52.820, the table in paragraph (e) is amended by adding the 
entry ``(50) Lead Redesignation SIP and Maintenance Plan'' to read as 
follows:


Sec.  52.820  Identification of plan.

* * * * *
    (e) * * *

                                   EPA-Approved Iowa Nonregulatory Provisions
----------------------------------------------------------------------------------------------------------------
                                        Applicable          State
    Name of nonregulatory SIP          geographic or      submittal     EPA Approval date        Explanation
            provision               nonattainment area       date
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
(50) Lead Redesignation SIP and    Portions of               9/18/17  8/16/2018, [Federal   [EPA-R07-OAR-2018-05
 Maintenance Plan.                  Pottawattamie                      Register citation     32; FRL-9982-27--
                                    County.                            of the final rule].   Region 7].
----------------------------------------------------------------------------------------------------------------

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.  81.316, the table entitled ``Iowa--2008 Lead NAAQS'' is 
amended by revising the entry ``Pottawattamie County, IA:'' to read as 
follows:


Sec.  81.316  Iowa

* * * * *

                                              Iowa--2008 Lead NAAQS
----------------------------------------------------------------------------------------------------------------
                                                            Designation for the 2008 NAAQS \a\
            Designated area             ------------------------------------------------------------------------
                                                  Date \1\                               Type
----------------------------------------------------------------------------------------------------------------
Pottawattamie County, IA:
    Pottawattamie County (part)........  [Date of publication of     Attainment.
                                          the final rule in the
                                          Federal Register].
        Area bounded by Avenue G on the  ..........................  ...........................................
         north, N 16th/S 16th street on
         the east, 23rd Avenue on the
         south, and N 35th/S 35th
         street on the west.
Rest of State..........................  ..........................  Unclassifiable/Attainment.
----------------------------------------------------------------------------------------------------------------
\a\ Includes Indian Country located in each county or area, except as otherwise specified.
\1\ December 31, 2011 unless otherwise noted.

[FR Doc. 2018-17583 Filed 8-15-18; 8:45 am]
 BILLING CODE 6560-50-P