NOT FOR PUBLICATION FILED

UNITED STATES COURT OF APPEALS APR 21 2022

MOLLY C. DWYER, CLERK

U.S. COURT OF APPEALS

FOR THE NINTH CIRCUIT

DAVID MATUSOW; SANDRA L. BAHR, No. 20-72279

Petitioners, EPA No.

EPA-R09-OAR-2019-0541

v.

ANDREW WHEELER, Administrator, MEMORANDUM* United States Environmental Protection Agency; JOHN BUSTERUD, Regional Administrator, U.S. EPA Region 9; U.S.

ENVIRONMENTAL PROTECTION

AGENCY,

Respondents.

On Petition for Review of an Order of the Environmental Protection Agency

Argued and Submitted March 11, 2022 Phoenix, Arizona

Before: HAWKINS, PAEZ, and WATFORD, Circuit Judges.

David Matusow and Sandra Bahr petition for review of the Environmental

Protection Agency’s (“EPA”) final action approving revisions to Arizona’s state

implementation plan (“SIP”) to meet the Clean Air Act requirements for the 2008

* This disposition is not appropriate for publication and is not precedent except as provided by Ninth Circuit Rule 36-3. ozone National Ambient Air Quality Standards (“NAAQS”) in the Phoenix-Mesa

nonattainment area (“Phoenix NAA”). We have jurisdiction under 42 U.S.C.

§ 7607(b)(1). We will set aside EPA’s action only if it is “arbitrary, capricious, an

abuse of discretion, or otherwise not in accordance with law.” 5 U.S.C. § 706(2)(A).

We deny the petition for review.

The petition before us is one of several challenges petitioners have brought

concerning EPA’s actions regarding the Phoenix NAA. Shortly before filing the

instant petition, petitioners also filed a petition for review of EPA’s determination

that the Phoenix NAA had attained the 2008 ozone NAAQS by the designated

attainment date of July 20, 2018. Many of petitioners’ challenges to EPA’s approval

of the SIP revision depend upon their contention that the Phoenix NAA did not

actually reach attainment by the attainment date. While briefing was underway on

the instant petition for review, our court denied petitioner’s companion challenge to

EPA’s attainment finding for the Phoenix NAA. See Bahr v. Regan, 6 F.4th 1059

(9th Cir. 2021). Petitioners now appear to concede, and we agree, that Bahr

forecloses the majority of their challenges to EPA’s approval of the SIP revision as

well.

Petitioners preserved the discrete argument that the Clean Air Act did not

allow EPA to excuse the State from including reasonable further progress (“RFP”)

contingency measures in the SIP revision. See 42 U.S.C. § 7607(d) (limiting judicial

2 20-72279 review to only those objections “raised with reasonable specificity during the period

for public comment”). Although Bahr involved attainment contingency measures,

its reasoning applies to RFP contingency measures as well, and we defer to EPA’s

permissible interpretation of the statute. See Bahr, 6 F.4th at 1082–83 (analyzing

EPA action following two-step approach set forth in Chevron, USA Inc. v. Natural

Res. Def. Council, Inc., 467 U.S. 837 (1984), and deferring to EPA’s reasonable

resolution of statutory ambiguity).

RFP contingency measures are intended to aid a region’s progress toward

attainment by the attainment date, and thus operate in advance of that date. See 42

U.S.C. § 7501(1) (defining RFP as “such annual incremental reductions in emissions

. . . for the purpose of ensuring attainment of the applicable national ambient air

quality standard by the applicable date”); id. § 7511a(b)(1)(A)(i) (requiring SIP to

provide for “such specific annual reductions in emissions of volatile organic

compounds and oxides of nitrogen as necessary to attain the national primary

ambient air quality standard for ozone by the attainment date”); see also 84 Fed.

Reg. 52,838, 52,847 (Oct. 3, 2019) (explaining EPA’s understanding that Congress

intended a finding that an area attained the standard by the attainment date to mean

that RFP requirements are met). The Clean Air Act does not specify whether a SIP

must include RFP contingency measures once EPA issues a determination that the

area achieved attainment by the attainment date. See Bahr, 6 F.4th at 1083 (finding

3 20-72279 statute is silent as to attainment contingency measure requirement in event of

attainment by the attainment date). Because RFP contingency measures operate in

advance of the attainment date, EPA’s suspension of the requirement for Arizona’s

SIP revision was reasonable. See id. at 1084 (“EPA’s interpretation that such

measures may be waived or suspended if the only contingency upon which such

measures are triggered cannot possibly occur does no violence to the statute or to

EPA’s ability to enforce the Clean Air Act’s NAAQS program.”).

DENIED.

4 20-72279