[Federal Register Volume 59, Number 151 (Monday, August 8, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-19290]


[[Page Unknown]]

[Federal Register: August 8, 1994]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 81

[FRL-5028-6]

 

Preparation, Adoption, and Submittal of PM10 State 
Implementation Plan, Nonattainment Area Designation for Utah

AGENCY: Environmental Protection Agency (EPA).

ACTION: Information notice.

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SUMMARY: In this document, EPA is announcing its notification to the 
Governor of Utah that EPA believes that Weber County should be 
designated nonattainment for PM10.

DATES: No later than 120 days after the State's response, if any, EPA 
must promulgate the redesignation it deems necessary and appropriate.

ADDRESSES: Information supporting the basis for notifying Utah, that 
EPA believes Weber County's PM10 designation should be revised to 
nonattainment, is available for inspection during normal business hours 
at the Environmental Protection Agency, Region VIII, Air Programs 
Branch, 999 18th Street, Suite 500, Denver, Colorado, 80202-2405.

FOR FURTHER INFORMATION CONTACT: Callie Videtich, Air Programs Branch, 
U.S. Environmental Protection Agency, Region VIII, Denver, Colorado 
80202-2466, (303) 293-1754.

SUPPLEMENTARY INFORMATION: On July 1, 1987, the EPA promulgated revised 
national ambient air quality standards (NAAQS) for particulate matter 
(PM) (52 FR 24634), replacing total suspended particulates (TSP) as the 
indicator for PM with a new indicator called PM10 that includes 
only those particles with an aerodynamic diameter less than or equal to 
a nominal 10 microns. At the same time, EPA set forth regulations for 
implementing the revised particulate matter standards and announced 
EPA's State Implementation Plan (SIP) development policy elaborating 
PM10 controls necessary to assure attainment and maintenance of 
the PM10 NAAQS (see generally 52 FR 24672). The EPA adopted a 
PM10 SIP development policy dividing all areas of the country into 
three categories based on their probability of violating the new NAAQS: 
(1) Areas with a strong likelihood of violating the new PM10 NAAQS 
and requiring substantial SIP adjustment were placed in group I; (2) 
areas where attainment of the PM10 NAAQS was possible and existing 
SIP's needed less adjustment were placed in group II; and (3) areas 
with a strong likelihood of attaining the PM10 NAAQS and, 
therefore, needing adjustments only to their preconstruction review 
program and monitoring network were placed in group III (52 FR 24672, 
24679-24682).
    Pursuant to section 107(d)(4)(B) of the Act, areas previously 
identified as group I and other areas which had monitored violations of 
the PM10 NAAQS prior to January 1, 1989, were, by operation of 
law, designated nonattainment for PM10. Descriptions of the areas 
identified as group I and II areas were clarified in a Federal Register 
notice on October 31, 1990 (55 FR 45799). That notice also identified 
group II areas which violated the standards as of January 1, 1989. The 
EPA has announced all of the areas that were designated nonattainment 
by operation of law for PM10 upon enactment of the Act in a 
Federal Register notice dated November 6, 1991, (56 FR 56694) with 
corrections to that notice made November 30, 1992 (57 FR 56762). In 
these notices, EPA indicated that Weber County was designated 
unclassifiable for PM10.
    In addition, EPA is authorized to promulgate the designation of new 
areas as nonattainment for PM10 pursuant to section 107(d)(3) of 
the Act on the basis of air quality data, planning and control 
considerations, or any other air quality-related consideration that the 
Administrator deems appropriate. Based upon available information, on 
July 14, 1994, EPA notified the Governor of Utah that it believes that 
Weber County should be redesignated as nonattainment. Within 120 days 
of EPA notification, the Governor of Utah must submit to EPA the 
designation which he considers appropriate for Weber County. No later 
than 120 days after the State's response, if any, EPA must promulgate 
the redesignation it deems necessary and appropriate. If redesignated 
to nonattainment, pursuant to section 189(a)(2)(B) of the Act, the 
State must submit a PM10 SIP to EPA within 18 months after EPA 
promulgates the nonattainment designation.

This Action

    The EPA is, by this notice, identifying for the public Weber County 
as an area which should be redesignated to nonattainment. Upon receipt 
of a response by the Governor, EPA will review the submitted 
information and conduct appropriate rulemaking, at which time the 
public will have opportunity for review and comment.

List of Subjects in 40 CFR Part 81

    Environmental protection, Air pollution control, Particulate 
matter.

    Authority: Sections 107(d), 110 and 301(a) of the Clean Air Act 
as amended.

    Dated: July 14, 1994.
William P. Yellowtail,
Regional Administrator.
[FR Doc. 94-19290 Filed 8-5-94; 8:45 am]
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