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Federal Register / Vol. 86, No. 97 / Friday, May 21, 2021 / Rules and Regulations
4. Section 52.248 is amended by adding paragraph l to read as follows:

52.248 Identification of planconditional approval.

l The EPA is conditionally approving the California State Implementation Plan SIP for Nevada County Western part for the 2008
ozone NAAQS with respect to the contingency measures requirements of CAA sections 172c9 and 182c9.
The conditional approval is based on a commitment from the Northern Sierra Air Quality Management District District in a letter dated October 26, 2020, to adopt a specific rule revision, and a commitment from the California Air Resources Board CARB dated November 16, 2020, to submit the amended District rule to the EPA within 12 months of the effective date of the final conditional approval. If the District or CARB fail to meet their commitments within one year of the effective date of the final conditional approval, the conditional approval is treated as a disapproval.
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ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Parts 52 and 81
EPAR10OAR20200190; FRL10023
66Region 10

Air Plan Approval; ID: Logan UtahIdaho PM2.5 Redesignation to Attainment and Maintenance Plan Environmental Protection Agency EPA.
ACTION: Final rule.
AGENCY:

The Environmental Protection Agency EPA is redesignating the Idaho portion of the Logan, Utah-Idaho fine particulate matter PM2.5 nonattainment area Logan UT-ID NAA to attainment for the 2006 PM2.5 National Ambient Air Quality Standard NAAQS. EPA is also approving a maintenance plan for the area demonstrating continued compliance with the 2006 PM2.5
NAAQS through 2031, which the Idaho Department of Environmental Quality IDEQ submitted along with the redesignation request on September 13, 2019, for inclusion in the Idaho State Implementation Plan SIP.
Additionally, EPA is approving the 2031
motor vehicle emissions budgets included in Idahos maintenance plan for PM2.5, nitrogen oxides NOX and volatile organic compounds VOC. EPA

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SUMMARY:

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is taking this final action pursuant to the Clean Air Act CAA or the Act.
DATES: This rule is effective on June 21, 2021.
ADDRESSES: EPA has established a docket for this action under Docket ID
No. EPAR10OAR20200190. All documents in the docket are listed on the https www.regulations.gov website. Although listed in the index, some information is not publicly available, e.g., CBI 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 through https
www.regulations.gov, or please contact the person identified in the FOR FURTHER
INFORMATION CONTACT section for additional availability information.
FOR FURTHER INFORMATION CONTACT:
Adam Clark, 206 5531495, clark.adam@epa.gov, EPA Region 10, 1200 6th Avenue, Suite 155, Seattle, Washington, 98101.
SUPPLEMENTARY INFORMATION:
Throughout this document whenever we, us, or our is used, it is intended to refer to EPA.
I. Background On October 17, 2006, EPA revised the level of the 24-hour PM2.5 NAAQS, lowering the primary and secondary standards from the 1997 standard of 65
micrograms per cubic meter mg/m3 to 35 mg/m3 71 FR 61144. On November 13, 2009, EPA designated a portion of Franklin County, Idaho and portions of Cache County, Utah nonattainment for the 2006 24-hour PM2.5 NAAQS 74 FR
58688. This cross-boundary nonattainment area is referred to as the Logan, UT-ID PM2.5 NAA. On September 13, 2019, IDEQ submitted to EPA a request to redesignate the Idaho portion of the Logan UT-ID PM2.5 NAA
to attainment, per CAA section 107d3E. IDEQ also submitted a CAA section 175A maintenance plan to demonstrate continued attainment of the 2006 PM2.5 NAAQS in the area for at least 10 years after approval of the redesignation. On February 17, 2021, EPA proposed to redesignate the Franklin County, ID portion of the Logan UT-ID PM2.5 NAA to attainment and approve into the Idaho SIP the associated maintenance plan 86 FR
9884. As described in detail in that action, EPAs proposed approval of the redesignation request and maintenance plan is based upon our determination that the area attains the 2006 24-hour PM2.5 NAAQS and that all other CAA

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section 107d3E redesignation criteria have been met for the area.
II. Response to Comments EPA received comments from three individuals during the 30-day comment period following publication of the proposed approval in the Federal Register. A summary of these comments and EPAs responses is provided below.
Comment 1: Two of the commenters expressed concern about the current air quality in the Logan, UT-ID PM2.5 NAA, commonly referred to as the Cache Valley. One of these commenters stated that attainment had only been achieved on paper, but that air quality in the Cache Valley remained poor. This commenter suggested different local causes of poor air quality, including an increase in the number of diesel pickup trucks and snowmobiles in the area, the burning of agricultural fields and ditches, the burning of slashed trees by the U.S. Forest Service, and nonadherence to idling restrictions. Both commenters asserted that the poor air quality in the area caused negative health impacts for them including the need to purchase indoor air purifiers, and often prevented them from recreating outdoors.
Response 1: The comments speak generally about air quality in the area, but do not provide any specific information to contradict EPAs proposed finding that the Logan UT-ID
area meets the criteria for redesignation under CAA Section 107d3E for the 2006 PM2.5 NAAQS. As discussed in detail in the proposal, EPAs review of air monitoring data in the Logan UT-ID
PM2.5 NAA demonstrates that the area has attained the 2006 24-hour PM2.5
NAAQS continuously since the 2015
2017 design value period which was the basis for our October 19, 2018
determination of attainment by the attainment date and clean data determination 86 FR 9886. These comments do not provide a basis to reconsider EPAs determination that the area meets the criteria under CAA
Section 107d3E or to otherwise disapprove IDEQs redesignation request or associated maintenance plan for the Idaho portion of the Logan UT-ID NAA.
Comment 2: Two of the commenters provided suggestions to improve air quality in the Cache Valley. One commenter stated that the Cache Valley needs access to Tier 3 gasoline and more electric vehicle EV charging stations.
Another commenter asserted that the state thwarts efforts to induce private citizens to own appropriate vehicles that can reduce air pollution by proposing to increasing personal property taxes from 200400%+ on
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