423 F.3d 989

ASSOCIATION OF IRRITATED RESIDENTS, Petitioner,

v.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY; 

Michael Leavitt, in his official capacity as Administrator of the 

U.S. Environmental Protection Agency,

Wayne Nastri, in his official capacity as Regional Administrator 

for Region IX of the U.S. Environmental Protection Agency, and 

Deborah Jordan, in her official capacity as Acting Regional 

Administrator Region IX of the U.S. Environmental Protection 

Agency, Respondents,

San Joaquin Valley Unified Air Pollution Control District; 

California Air Resources Board, Intervenors-Respondents.

Medical Advocates For Healthy Air; Latino Issues Forum; Sierra 

Club, Petitioners,

v.

United States Environmental Protection Agency; Michael Leavitt, 

Administrator, U.S. Environmental Protection Agency and Wayne 

Nastri, Regional Administrator, Region IX, U.S. Environmental 

Protection Agency, Respondents,

San Joaquin Valley Unified Air Pollution Control District; 

California Air Resources Board, Intervenors-Respondents.

No. 04-72650.

No. 04-72736.

United States Court of Appeals, Ninth Circuit.

Argued and Submitted June 15, 2005.

Filed September 6, 2005.

COPYRIGHT MATERIAL OMITTED Susan Britton, Earth Justice, Oakland, CA and Brent J. 

Newell, Center on Race, Poverty & Environment, San Francisco, CA, for the 

petitioners.

David A. Carson, United States Department of Justice, Denver, Colorado, Philip M. Jay, 

Fresno, CA, and Gavin G. McCabe, San Francisco, CA, for the respondents.

On Petition for Review of an Order of the Environmental Protection Agency. EPA Nos. 

Fed.Reg. 69, Clean Air 40 CFR.

Before SCHROEDER, Chief Judge, CANBY, Circuit Judge, and DUFFY,* Senior Judge.

SCHROEDER, Chief Judge.

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Background

This is an expedited review of the Environmental Protection Agency's May 26, 

2004 final approval of the San Joaquin Valley's 2003 PM-10 Implementation Plan 

(Plan). 69 Fed.Reg. 30,006. In approving the Plan, the EPA has set a new deadline 

for the Valley to attain the national ambient air quality standard for PM-10 

pollutants, which are various airborne fine particles of less than ten microns in 

diameter. The new deadline is 2010.

1

The petitioners, whose challenges have been consolidated, are the following 

groups and non-profit organizations: Association of Irritated Residents (AIR), 

Latino Issues Forum, Medical Advocates for Healthy Air, and the Sierra Club. They 

maintain that under the Clean Air Act, the absolute outside deadline for PM-10 

areas to attain the air quality standard is 2006.

2

Petitioners raise a number of issues, but the most significant is the EPA's 

authority to set a deadline that extends past 2006. We deny the petitions for review 

because we hold that the 2010 deadline was authorized within the structure of the 

Act, and that petitioners' other challenges to the Plan do not warrant judicial 

intervention.

3

The Act establishes a comprehensive program requiring cooperation between 

states and the federal government to improve the nation's air quality. 42 U.S.C. §§ 

7401-7671q. The Act also sets up a scheme under which the public is given 

significant opportunities to offer input and criticism at various stages of each state's 

efforts to achieve better air quality. See, e.g., 69 Fed.Reg. 30,006. States carry most 

of the burden of furthering the Act's purposes by developing implementation plans 

after extensive public involvement. These petitioners have participated throughout 

this process for the Valley at each opportunity for notice and comment. The Valley's 

efforts to control PM-10 pollution over the past decade illustrate the flexible, 

cooperative and incremental nature of the Act. See, e.g., 42 U.S.C. § 7410(a)(2)(A).

4

California's San Joaquin Valley is the heart of the state's top agricultural region, 

producing a wide variety of fruits and vegetables. It is bordered on the west by the 

coastal mountain ranges, and on the east by the Sierra Nevada mountains including 

Yosemite, Kings Canyon and Sequoia National Parks. Unfortunately, the same 

fertile soil that has led the region to be known as the state's "salad bowl" has also 

contributed to high population growth and industry which, together with the 

region's topography, have resulted in severe air quality difficulties.

5

PM-10 pollution results largely from agricultural operations and dust kicked up 

on roads. It is a serious problem in the Valley. The EPA has recognized that this 

pollutant can cause damage to lung tissue, chronic illness and premature death. 63 

Fed.Reg. 41,326 (August 3, 1998); 62 Fed.Reg. 38652 (July 18, 1997); see also Vigil 

v. Leavitt, 381 F.3d 826, 830 (9th Cir.2004). Congress addressed this problem in 

1990 when it amended the Act to include specific provisions dealing with PM-10 

pollution, and set an attainment deadline of December 31, 2001 for seriously 

deficient areas. 42 U.S.C. § 7513(c)(2).

6

Pursuant to the 1990 amendments to the Act, the Valley was designated a 

"moderate" PM-10 area by operation of law. See 56 Fed.Reg. 11101, 11103 (March 

15, 1991). California subsequently directed the San Joaquin Valley Unified Air 

Pollution Control District (District), a state regulatory agency, to develop and adopt 

a comprehensive air pollution control strategy calling for the implementation, 

maintenance and enforcement of PM-10 air quality standards in the Valley. The 

District's plans and plan revisions were eventually forwarded to the California Air 

Resources Board (CARB) for review and inclusion in the state's air pollution plans. 

7

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The PM-10 Attainment Deadline

Every state plan or plan revision must be adopted by the state after reasonable 

notice and hearing. See 42 U.S.C. § 7410(a)(1). Ultimately, the state adopts the 

plans and forwards them to the EPA for approval.

In 1993, after various exchanges between the District and the EPA, the EPA 

found that the Valley could not practicably attain the PM-10 standard by the 

statutory deadline for "moderate areas," which was December 31, 1994. The EPA 

thus reclassified the Valley as a "serious area." 58 Fed.Reg. 3334, 3337 (Jan. 8, 

1993). This reclassification meant that the Valley's attainment deadline was 

changed to December 31, 2001. 42 U.S.C. § 7513(c)(2); 58 Fed.Reg. at 3340. 

California submitted a "serious area" plan to the EPA in July 1997. See 69 Fed.Reg. 

5412, 5413 (Feb. 4, 2004). That plan included a request for a five year extension of 

the attainment date under § 188(e) of the Act.

8

In early 2002, the EPA indicated that it would disapprove the 1997 Plan for the 

Valley, so the state withdrew it. In July 2002, the EPA found that the Valley had 

failed to attain the required standards by the December 31, 2001 deadline. 67 

Fed.Reg. 48,039 (July 23, 2002). The state was then required to submit plan 

revisions under § 189(d). The revisions had to provide for attainment, as well as for 

five percent annual reductions of PM-10 pollutants. Following the required notice 

and hearing, California adopted and submitted still another plan in August 2003.

9

In May 2004, after another notice and comment period during which petitioners, 

among others, raised most of the concerns at issue here, as well as many others, the 

EPA approved the 2003 Plan. That Plan established a new attainment goal of 

December 2010. The EPA's approval of the 2003 Plan effectively certified that the 

new 2010 deadline complied with the Act's general provisions for changing 

attainment deadlines that have passed. That approval is the subject of this petition 

for review, in which the petitioners claim, inter alia, that the EPA could not, as a 

matter of law, have approved the new deadline using those general provisions. 

There has been extensive briefing by all parties, including the District and CARB, 

who have intervened in support of the EPA's plan approval.

10

Under the Act, there are essentially two statutory pathways through which PM-10 

attainment deadlines may be changed. The first applies generally to all pollutants, 

and is the one that the EPA relied on here in setting the 2010 deadline. The second 

applies only to PM-10 pollutants. The petitioners argue that the existence of the 

second pathway forecloses use of the first for PM-10 pollutants, and creates an 

outside attainment date of December 2006.

11

Under the Administrative Procedure Act, the EPA's final action in this case may 

be set aside only if it is "arbitrary, capricious, an abuse of discretion, or otherwise 

not in accordance with law." 5 U.S.C. § 706(2)(A); see, e.g., Vigil v. Leavitt, 381 

F.3d 826, 833 (9th Cir.2004). We deal with an issue of law. We conclude that the 

EPA properly relied on the Act's general provisions in approving the 2010 deadline. 

We turn to the relevant provisions.

12

Serious PM-10 areas, such as the Valley, that missed the December 31, 2001 

deadline, were required to submit further plan revisions to bring about annual PM10 or PM-10 precursor reductions of five percent. 42 U.S.C. § 7513a(d). The section 

reads:

13

Failure to attain — In the case of a Serious PM-10 nonattainment area in which 

the PM-10 standard is not attained by the applicable attainment date, the State in 

which such area is located shall, after notice and opportunity for public comment, 

14

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submit within 12 months after the applicable attainment date [December 31, 2001], 

plan revisions which provide for attainment of the PM-10 air quality standard and, 

from the date of such submission until attainment, for an annual reduction in PM10 or PM-10 precursor emissions within the area of not less than 5 percent of the 

amount of such emissions as reported in the most recent inventory prepared for 

such area.

42 U.S.C. § 7513a(d). This section does not itself, however, establish any new 

attainment deadline dates. The EPA thus looked to the method of deadline change 

generally set forth in § 179(d). That section reads:

15

(d) Consequences for failure to attain — (1) Within one year after the 

Administrator publishes the notice under subsection (c)(2) of this section (relating 

to failure to attain), each State containing a nonattainment area shall submit a 

revision to the applicable implementation plan meeting the requirements of 

paragraph (2) of this subsection.

16

42 U.S.C. § 7509(d)(1). Section 179(d)(3) then provides for a new attainment date 

five years from the date of the EPA's notice that an area has failed to attain any 

pollutant's applicable standard. That section also provides that the five year period 

can be extended five additional years as follows: (2) Attainment dates for 

nonattainment areas — (A) The attainment date for an area designated 

nonattainment with respect to a national primary ambient air quality standard shall 

be the date by which attainment can be achieved as expeditiously as practicable, but 

no later than 5 years from the date of the notice under section [179(c)(2)], except 

that the administrator may extend the attainment date to the extent the 

administrator determines appropriate, for a period no greater than 10 years from 

the date of the notice under section [179(c)(2)], considering the severity of 

nonattainment and the availability and feasibility of pollution control measures.

17

42 U.S.C. § 7502(a)(2)(A)(with substitutions per 42 U.S.C. § 7509(d)(3)). In sum, 

§ 179(d) authorizes the EPA to approve of plan revisions which set forth a new 

attainment date up to ten years from the time that the EPA has found that the area 

failed to attain the applicable air quality standard. Since the EPA published notice 

of the Valley's failure to attain the PM-10 standard in July 2002, the new, and here 

challenged, 2010 deadline would be authorized under these provisions.

18

The petitioners, nevertheless, argue that the existence of a statutory provision 

specifically enabling a state to request a five year extension of the PM-10 deadline 

forecloses the EPA's application of the general method of changing any attainment 

deadline that has already passed. Petitioners rely on § 188(e), which is under 

Subpart 4 of the Act dealing specifically with PM-10 plans. That section sets out the 

requirements for a state to request a one time only, five year extension of the PM-10 

deadline. It reads:

19

Upon application by any State, the Administrator may extend the attainment date 

for a Serious Area beyond the date specified under subsection (c) of this section, if 

[1] attainment by the date established under subsection (c) of this section would be 

impracticable, [2] the State has complied with all requirements and commitments 

pertaining to that area in the implementation plan, and [3] the State demonstrates 

to the satisfaction of the Administrator that the plan for that area includes the most 

stringent measures that are included in the implementation plan of any State or are 

achieved in practice in any State, and can feasibly be implemented in the area. . . . 

The Administrator may grant at most one such extension for an area, of no more 

than 5 years.

20

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Other Contentions

42 U.S.C. § 7513(e). No language in Subpart 4 prohibits the EPA's application of 

the general provisions to change attainment deadlines. To support their position 

that the PM-10 specific provisions under Subpart 4 are exclusive, petitioners argue 

that allowing the EPA to look beyond those provisions to use the more general 

provisions in this case would allow a state to circumvent the 2001 deadline by 

waiting for the date to pass, rather than asking for an extension. The petitioners 

also claim that the EPA's interpretation would allow for countless ten year 

extensions without any repercussions.

21

Petitioners' position is not, however, supported by the overall statutory scheme. 

There are repercussions for failing to attain the standard by the applicable deadline. 

An area that simply waits for the deadline to pass without requesting a deadline 

extension suffers an additional consequence of having to reduce its emissions by 

five percent annually. 42 U.S.C. § 7513a(d). This consequence imposes a significant 

burden on the nonattaining area. The quota also helps ensure that the area will 

eventually be forced to achieve attainment. Moreover, if a state neglects to 

implement such a newly approved revised plan, that state eventually faces very 

severe sanctions including loss of highway funding. 42 U.S.C. § 7509(b). Indeed, the 

petitioners' interpretation would leave the EPA with no ability to set a new date at 

all once a PM-10 area has missed its deadline. Their position must be rejected. We 

therefore conclude that the statutory scheme authorizes the EPA to look to § 179(d) 

in order to set a new attainment deadline once the EPA has determined that a PM10 area has failed to attain the standard. The EPA's interpretation of the Act, 

looking to the general provisions to provide an alternative path for setting a new 

PM-10 attainment deadline, is the correct interpretation of the statutory provisions 

that, when viewed in the full statutory context, are not ambiguous. See Chevron, 

USA v. NRDC, 467 U.S. 837, 842-45, 104 S.Ct. 2778, 81 L.Ed.2d 694 (1984).

22

23 A. Methods Required to Achieve Additional Five Percent Reductions

The petitioners' next argument relates to the precise methods used to achieve the 

five percent reductions mandated by § 189(d) and discussed in the previous section. 

42 U.S.C. § 7513a(d). The petitioners claim that to meet the five percent 

requirement for a given year, the Valley cannot plan to use reductions from 

previously required or implemented emissions control measures. In environmental 

language, the petitioners claim that Congress intended to exclude reductions 

resulting from "best available control measures" (BACM) in determining whether 

the five percent reductions required under § 189(d) have been achieved.

24

"Serious" areas such as the Valley must implement BACM as opposed to the 

"reasonably available control measures" required of "moderate" areas. 42 U.S.C. § 

7513a(a)1, (b)(1). BACM measures must be implemented within four years of 

reclassification. 42 U.S.C. § 7513a(b)(1)(B). The Valley was required to implement 

BACM by 1997, well before the area's original attainment deadline. Section 189(d), 

requiring the additional five percent reductions, however, takes effect only after an 

area has missed its attainment deadline. By allowing the state to use BACM to meet 

that five percent requirement, the petitioners claim that the EPA is eviscerating the 

"tighten the screws" purpose of § 189(d). The language of § 189(d), however, does 

not specifically require that an area use any particular method to achieve 

reductions. Although the Valley was supposed to implement BACM before the 

Valley missed the deadline and thereby triggered the additional five percent 

reduction requirement, emissions reductions from BACM are presumably intended 

to continue as long as they are effective, and late implementation is better than 

none. The Plan is therefore sound as a matter of statutory policy, and the language 

25

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C. Ammonia Emissions

of the Act does not in any way prohibit or limit the use of particular emissionsreducing measures, including BACM, in calculating whether the additional 

reductions have been achieved.

A review of other similar provisions in the Act further supports this result. For 

example, Congress knew how to provide that certain control measures would not be 

counted towards percentage reduction requirements, for it expressly did so in 

provisions dealing with ozone attainment. 42 U.S.C. § 7511a(b)(1)(D) (excluding 

emissions reductions from various measures, including those related to motor 

vehicle exhaust, from counting towards an additional 15% reduction requirement). 

Congress similarly must have known that reductions from BACM would continue to 

occur even after attainment dates, and yet did not include any similar language in § 

189(d) to preclude crediting such reductions toward an area's five percent 

requirement. The Act permits crediting BACM reductions. The EPA interpreted the 

Act correctly when it approved this portion of the Valley's plan.

26

27 B. Crediting Excess Reductions to Meet Requirement in Later Years

The petitioners' next argument also relates to the Act's requirement that the Plan 

accounts for an annual five percent reduction in emissions. The petitioners argue 

that the EPA violated § 189(d) by allowing the Plan to credit excess emissions 

reductions in one year towards later, possibly deficient, years, instead of insisting 

on a five percent reduction per year.

28

Section 189(d) requires "an annual reduction in PM-10 or PM-10 precursor 

emissions within the area of not less than 5 percent." 42 U.S.C. § 7513a(d). The 

petitioners argue that the word "annual" precludes the Plan's allowance for 

"banking" or crediting earlier emissions reductions to later years. For illustration, 

the petitioners argue that if an area achieves an eight percent emissions reduction 

in one year, it should not be able to credit the excess three percent towards the next 

year's five percent requirement. The EPA counters that Congress intended to 

provide incentives for the use of the most effective measures as early as possible, 

and that petitioners' interpretation would encourage areas to delay early, sizable 

emissions reductions in order to be able to meet the five percent requirement in 

subsequent years.

29

We agree with the EPA that prohibiting any credit for past emissions reductions 

under § 189(d) would discourage early reductions and conflict with the larger goals 

of the Act. By allowing such crediting, the EPA provides a material incentive for 

implementing the most effective measures as quickly as possible. The EPA thus 

properly approved this portion of the Plan.

30

The petitioners' next argument concerns the Plan's rejection of control measures 

for major stationary sources of ammonia. The petitioners argue that the EPA 

improperly approved of the portion of the Plan which requires control measures for 

oxides of nitrogen as precursors to PM-10 pollution, but not for ammonia. The EPA 

found that ammonia does not contribute significantly to PM-10 levels in the Valley 

and that the Valley's decision to control only oxides of nitrogen was therefore 

reasonable.

31

Ammonium nitrate, formed by a reaction between ammonia gas and oxides of 

nitrogen, is the largest component of PM-10 during the Valley's worst PM-10 

episodes. Ammonia and oxides of nitrogen are thus precursors to PM-10 pollution. 

Section 189(d)'s control requirements apply to:

32

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D. Contingency Measures

Conclusion

major stationary sources of PM-10 precursors, except where the Administrator 

determines that such sources do not contribute significantly to PM-10 levels which 

exceed the standard in the area.

33

42 U.S.C. § 7513a(e). Petitioners contend that ammonia "contributes 

significantly" and must be subject to control measures. The EPA, however, decided 

to allow the District to regulate only oxides of nitrogen. According to both the EPA 

and the District, because "controlling ammonia in addition to [oxides of nitrogen] 

will not accelerate the attainment date for PM-10 in the [Valley]," ammonia does 

not "contribute significantly" to the Valley's PM-10 pollution. 69 Fed.Reg. at 

30,007. Indeed, as the EPA pointed out, because concentrations of ammonia in the 

Valley are high relative to concentrations of oxides of nitrogen, controlling 

ammonia would not accelerate the attainment date for PM-10 in the Valley at all.

34

This is a determination that is scientific in nature and is entitled to the most 

deference on review. Baltimore Gas & Elec. Co. v. NRDC, 462 U.S. 87, 103, 103 

S.Ct. 2246, 76 L.Ed.2d 437 (1983); Central Arizona Water Cons.Dist. v. EPA, 990 

F.2d 1531, 1539-40 (9th Cir.1993). There is no basis for this court to second guess 

the EPA's approval of that portion of the plan, particularly given the discretion 

vested in the EPA to consider various factors in determining whether a precursor 

"contributes significantly" to PM-10 levels. See 42 U.S.C. § 7513a(e).

35

The EPA did not act on that portion of the plan dealing with contingency 

measures in the event of future nonattainment of the new deadline. The petitioners 

contend that the EPA was required to take action on the state's contingency 

measures before it approved the remainder of the Plan. The petitioners claim that 

the EPA can either approve or disapprove various parts of a plan, but that the 

agency cannot simply refuse to take any action on a required plan element. The EPA 

responds that the Act authorizes piecemeal approvals and that it was therefore not 

required to take any action on the contingency measures when it approved the rest 

of the plan.

36

Section 172(c)(9) requires that nonattainment areas' plans include contingency 

measures that will go into effect "if the area fails to make reasonable further 

progress, or to attain the [air quality standards] by the [applicable] attainment 

date." 42 U.S.C. § 7502(c)(9). The EPA acknowledges that contingency measures 

are a required element of the Valley's revised plan, but points out that the Act does 

not require the EPA to take action on all of the plan's elements at the same time. 

Different aspects of plan revisions are submitted at various times under the statute. 

A plan is thus not necessarily a single document that is prepared as a unit, and 

reviewed and approved in a single administrative action. This court has held that 

the Act permits partial or piecemeal approvals. Hall v. EPA, 273 F.3d 1146, 1159 

(9th Cir.2001). Such approvals ensure that earlier-approved provisions will become 

federally enforceable as soon as possible. The EPA's ability to postpone action on 

the contingency measures is consistent with the Act's overarching goal that 

nonattainment areas achieve the standards as expeditiously as practicable. See 42 

U.S.C. §§ 7502(c)(1); 7513(c)(2).

37

In sum, the EPA has properly approved of the San Joaquin Valley's PM-10 

attainment plan. The approval came after extensive public comments, and 

comports with the overall structure and purpose of the Clean Air Act. The petitions 

for review must be denied.

38

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39 Petitions DENIED.

Notes:

The Honorable Kevin Thomas Duffy, Senior United States District Judge for the 

Southern District of New York, sitting by designation

*

CC∅ | TRANSFORMED BY PUBLIC.RESOURCE.ORG

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