Clean Air Act Promulgation of Extension of Attainment Date for Ozone Nonattainment Area; Maine

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[A-1-FRL-5249-5]

Clean Air Act Promulgation of Extension of Attainment Date for

Ozone Nonattainment Area; Maine

AGENCY: Environmental Protection Agency (EPA).

ACTION: Final rule.

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SUMMARY: EPA is extending the attainment date for the Hancock and Waldo

Counties, a marginal ozone nonattainment area in Maine to November 15,

1994. This extension is based in part on monitored air quality readings

for the national ambient air quality standard for ozone during 1993.

This notice also updates tables in 40 CFR 52.1024 and 40 CFR 81.320

concerning attainment dates in the State of Maine.

EFFECTIVE DATE: This extension becomes effective July 28, 1995.

FOR FURTHER INFORMATION CONTACT: Richard P. Burkhart, Air, Pesticides

and Toxics Management Division, U.S. Environmental Protection Agency,

Region I, JFK Federal Bldg., Boston, MA 02203. Phone: 617-565-3244.

SUPPLEMENTARY INFORMATION: On Feb. 22, 1995 (60 FR 9813), EPA published

a notice of proposed rulemaking (NPR) for the State of Maine. The NPR

proposed extending the attainment deadline for ozone for Hancock and

Waldo Counties, and asked for public comment. No comments were

received.

CAA Requirements and EPA Actions Concerning Designation and

Classification

Section 107(d)(4) of the Clean Air Act as amended in 1990 (CAA)

required the States and EPA to designate areas as attainment,

nonattainment, or unclassifiable for ozone as well as other pollutants

for which national ambient air quality standards (NAAQS) have been set.

Section 181(a)(1) (table 1) required that ozone nonattainment areas be

classified as marginal, moderate, serious, severe, or extreme,

depending on their air quality.

In a series of Federal Register notices, EPA completed this process

by designating and classifying all areas of the country for ozone. See,

e.g., 56 FR 58694 (Nov. 6, 1991); 57 FR 56762 (Nov. 30, 1992); 59 FR

18967 (April 21, 1994).

Areas designated nonattainment for ozone are required to meet

attainment dates specified under the Act. For areas classified marginal

through extreme, the attainment dates range from November 15, 1993

through November 15, 2010. A discussion of the attainment dates is

found in 57 FR 13498 (April 16, 1992) (the General Preamble).

The Hancock and Waldo Counties, Maine area was designated

nonattainment and classified marginal for ozone pursuant to 56 FR 58694

(Nov. 6, 1991). By this classification, its attainment date became

November 15, 1993.

CAA Requirements and EPA Actions Concerning Meeting the Attainment

Date

Section 181(b)(2)(A) requires the Administrator, within six months

of the attainment date, to determine whether ozone nonattainment areas

attained the NAAQS. For ozone, EPA determines attainment status on the

basis of the expected number of exceedances of the NAAQS over the

three-year period up to, and including, the attainment date. See

General Preamble, 57 FR 13506. In the case of ozone marginal

nonattainment areas, the three-year period is 1991-93. CAA section

181(b)(2)(A) further states that, for areas classified as marginal,

moderate, or serious, if the Administrator determines that the area did

not attain the standard by its attainment date, the area must be

reclassified upwards.

However, CAA section 181(a)(5) provides an exemption from these

bump [[Page 33352]] up requirements. Under this exemption, EPA may

grant up to two one-year extensions of the attainment date under

specified conditions:

Upon application by any State, the Administrator may extend for

1 additional year (hereinafter referred to as the ``Extension

Year'') the date specified in table 1 of paragraph (1) of this

subsection if--

(A) the State has complied with all requirements and commitments

pertaining to the area in the applicable implementation plan, and

(B) no more than 1 exceedance of the national ambient air

quality standard level for ozone has occurred in the area in the

year preceding the Extension Year.

No more than 2 one-year extensions may be issued under this

paragraph for a single nonattainment area.

EPA interprets this provision to authorize the granting of a one-

year extension under the following, minimum, conditions: (i) The State

requests a one-year extension, (ii) all requirements and commitments in

the EPA-approved SIP for the area have been complied with, and (iii)

the area has no more than one measured exceedance of the NAAQS during

the year that includes the attainment date (or the subsequent year, if

a second one-year extension is requested).

EPA Action

On February 22, 1994 (60 FR 9813) EPA proposed to grant a one-year

extension of the attainment date for the Hancock and Waldo Counties,

Maine nonattainment area. Air quality monitors for this area revealed

two exceedances of the ozone National Ambient Air quality Standard

during the three year period from 1991 to 1993. Both exceedances

occurred in 1991, at a monitor located in Hancock County at a site

operated by the National Park Service. The site had data capture

problems in both 1991 and 1992. In 1993 the Maine Department of

Environmental Protection took over maintenance of the site and data

capture improved greatly. Since 1991 the site has not had any

exceedances of the NAAQS. EPA received no comments on this proposal.

Today EPA is granting the request for extension. Accordingly, EPA

is proposing to establish a new attainment date for the Hancock and

Waldo Counties, Maine area as November 15, 1994.

Regulatory Process

Under E.O. 12866, this action has been exempted from the Office of

Management and Budget's review.

Under the Regulatory Flexibility Act, 5 U.S.C. 600 et seq., EPA

must prepare a regulatory flexibility analysis assessing the impact of

any proposed or final rule on small entities. 5 U.S.C. 603 and 604.

Alternatively, EPA may certify that the rule will not have a

significant impact on a substantial number of small entities. Small

entities include small businesses, small not-for-profit enterprises,

and government entities with jurisdiction over populations of less than

50,000. Attainment date extensions under section 181(a)(5) of the CAA

do not create any new requirements; therefore, I certify that this

action will not have a significant impact on small entities.

List of Subjects

40 CFR Part 52

Environmental protection, Air pollution control, Intergovernmental

relations, Ozone.

40 CFR Part 81

Air pollution control, National parks, Wilderness areas.

Dated: May 22, 1995.

John P. DeVillars,

Regional Administrator, Region I.

Chapter I, title 40 of the Code of Federal Regulations is amended

as follows:

PART 52--[AMENDED]

1. The authority citation for part 52 continues to read as follows:

Authority: 42 U.S.C. 7401-7671q.

Subpart U--Maine

2. Section 52.1024 is revised to read as follows:

Sec. 52.1024 Attainment dates for national standards.

The following table presents the latest dates by which the national

standards are to be attained.

Attainment Dates Established by Clean Air Act of 1990

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Pollutant

-------------------------------------------------------

Air quality control region and nonattainment area SO2

-------------------- PM-10 NO2 CO O3

Primary Secondary

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AQCR 107:

Androscoggin County................................. (a) (b) (a) (a) (a) (g)

Kennebec County..................................... (a) (b) (a) (a) (a) (g)

Knox County......................................... (a) (b) (a) (a) (a) (g)

Lincoln County...................................... (a) (b) (a) (a) (a) (g)

Waldo County........................................ (a) (b) (a) (a) (a) (d)

Oxford Cnty. (Part) See 40 CFR 81.320............... (a) (b) (a) (a) (a) (e)

Franklin Cnty. (Part) See 40 CFR 81.320............. (a) (b) (a) (a) (a) (e)

Somerset Cnty. (Part) See 40 CFR 81.320............. (a) (b) (a) (a) (a) (e)

AQCR 108:

Aroostook Cnty. (Part) See 40 CFR 81.320............ (a) (b) (c) (a) (a) (a)

Remainder of AQCR................................... (a) (b) (a) (a) (a) (a)

AQCR 109:

Hancock County...................................... (a) (b) (a) (a) (a) (d)

Millinocket......................................... (e) (e) (a) (a) (a) (a)

Remainder of AQCR................................... (a) (b) (a) (a) (a) (a)

AQCR 110:

York County......................................... (a) (b) (a) (a) (a) (g)

Cumberland County................................... (a) (b) (a) (a) (a) (g)

Sagadahoc County.................................... (a) (b) (a) (a) (a) (g)

Oxford Cnty. (Part) See 40 CFR 81.320............... (a) (b) (a) (a) (a) (e)

AQCR 111................................................ (a) (b) (a) (a) (a) (a)

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a Air quality levels presently below primary standards or area is unclassifiable.

[[Page 33353]]

b Air quality levels presently below secondary standards or area is unclassifiable.

c 12/31/94.

d 11/15/94 (one-year extension granted).

e 11/15/95.

g 11/15/96.