Summary

EPA is taking final action to conditionally approve a revision to the State of Nevada's state implementation plan (SIP) for Clark County. The revision consists of an update to certain elements of the maintenance plan for the Clark County air quality planning area for the 1997 8-hour ozone national ambient air quality standards (NAAQS), including the emissions inventories, maintenance demonstration, and motor vehicle emissions budgets. EPA is conditionally approving the SIP revision because the SIP it continues to provide for maintenance of the 1997 ozone NAAQS; upon fulfillment of certain commitments, it will not interfere with attainment or reasonable further progress of the other NAAQS; and the budgets meet the applicable transportation conformity requirements. The approval is conditional because it is based on commitments to submit an additional SIP revision to reduce the safety margin allocations for the budgets within one year of this final conditional approval.

Action

Final Rule

Dates

This rule will be effective on September 26, 2019.

Addresses

EPA has established a docket for this action under Docket ID No. EPA-R09-OAR-2019-0365, at www.regulations.gov. All documents in the docket are listed on the www.regulations.gov website. Although listed in the index, some information is not publicly available, e.g., Confidential Business Information (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 www.regulations.gov, or please contact the person identified in the FOR FURTHER INFORMATION CONTACT section for additional availability information.

For Further Information Contact

Karina O'Connor (oconnor.karina@epa.gov), Air Planning Office (AIR-2), EPA Region IX, 75 Hawthorne Street, San Francisco, CA 94105. By phone at (775) 434-8176.