[Federal Register Volume 60, Number 213 (Friday, November 3, 1995)]
[Rules and Regulations]
[Pages 55792-55801]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-27062]



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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Parts 52 and 81
[MT32-1-7117a, ND6-2-7081a, UT21-1-6915a, WY7-1-7042a; FRL-5303-1]

Clean Air Act Approval and Promulgation of State Implementation 
Plans; Prevention of Significant Deterioration; Designation of Areas 
for Air Quality Planning Purposes; Montana, North Dakota, South Dakota, 
Utah, and Wyoming
AGENCY: Environmental Protection Agency (EPA).

ACTION: Direct final rule.

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SUMMARY: In this document, EPA is approving revisions to the prevention 
of 

[[Page 55793]]
significant deterioration (PSD) permitting regulations which were 
submitted as revisions to the State Implementation Plans (SIPs) for 
Montana, North Dakota, Utah, and Wyoming. The revisions were submitted 
mainly to address the replacement of the total suspended particulate 
(TSP) increments with increments for PM-10 (particulate matter 10 
micrometers or less in diameter). Also, North Dakota and Wyoming 
submitted PSD program revisions to incorporate changes in the Federal 
PSD regulations for utility pollution control projects. All of the 
States except Montana made other minor revisions to their PSD programs. 
EPA is approving the SIP revisions because they are consistent with the 
corresponding Federal regulations. EPA is also removing the TSP area 
designation tables and revising and/or adding PM-10 area designation 
tables in 40 CFR part 81 for these States as well as for the State of 
South Dakota (which has been delegated authority to implement the 
Federal PSD regulations in 40 CFR 52.21). With the PM-10 increments 
becoming effective in these areas, the TSP area designations no longer 
serve any useful purpose relative to PSD.

DATES: This action is effective on January 2, 1996 unless adverse or 
critical comments are received by December 4, 1995. If the effective 
date is delayed, timely notice will be published in the Federal 
Register.

ADDRESSES: Copies of the States' submittals and other information are 
available for inspection during normal business hours at the following 
locations: Air Programs Branch, Environmental Protection Agency, Region 
VIII, 999 18th Street, Suite 500, Denver, Colorado 80202-2405; Montana 
Air Quality Division, Department of Health and Environmental Sciences, 
836 Front Street, P.O. Box 200901, Helena, Montana 59620-0901; North 
Dakota Division of Environmental Engineering, State Department of 
Health and Consolidated Laboratories, 1200 Missouri Avenue, P.O. Box 
5520, Bismarck, North Dakota 58502-5520; Utah Division of Air Quality, 
Department of Environmental Quality, 150 North 1950 West, P.O. Box 
144820, Salt Lake City, Utah, 84114-4820; Wyoming Air Quality Bureau, 
Department of Environmental Quality, Herschler Building, 122 West 25th 
Street, Cheyenne, Wyoming 82002; and The Air and Radiation Docket and 
Information Center, 401 M Street, SW, Washington, D.C. 20460.

FOR FURTHER INFORMATION CONTACT: Vicki Stamper, 8ART-AP, Environmental 
Protection Agency, Region VIII, 999 18th Street, Suite 500, Denver, 
Colorado, (303) 293-1765.

SUPPLEMENTARY INFORMATION:

I. Background

    In this document, EPA is acting on revisions to the PSD permitting 
programs for the States of Montana, North Dakota, Utah, and Wyoming. 
The revisions were generally made to address the following changes in 
the Federal PSD permitting requirements in 40 CFR 51.166:
    A. The replacement of the TSP increments with increments for PM-10, 
which were promulgated by EPA on June 3, 1993 (58 FR 31622-31638); and
    B. The promulgation of revisions to the Federal PSD permitting 
requirements regarding utility pollution control projects that States 
could voluntarily adopt into their PSD regulations, which were 
promulgated by EPA on July 21, 1992 (57 FR 32314-32339).
    Specifically, the following submittals were made:
    The Governor of Montana submitted revisions to the Administrative 
Rules of Montana (ARM), rules 16.8.945, 16.8.947, 16.8.953, and 
16.8.960, on May 22, 1995 to incorporate changes in the Federal PSD 
permitting regulations for PM-10 increments.
    The Governor of North Dakota submitted revisions to Chapter 33-15-
15 of the North Dakota Air Pollution Control Rules on April 29, 1994 to 
incorporate changes in the Federal PSD permitting regulations for 
utility pollution control projects and PM-10 increments. Also, the 
State incorporated the significance levels for the three municipal 
waste combustor pollutants, which EPA promulgated on February 11, 1991 
(56 FR 5506). The April 1994 submittal also included other revisions to 
the North Dakota Air Pollution Control Rules, which EPA will act on 
separately.
    The Governor of Utah submitted revisions to R307-1-1 and R307-1-3 
of the Utah Air Conservation Regulations (UACR) on February 1, 1995 to 
incorporate changes in the Federal PSD permitting regulations for PM-10 
increments. The State also made some nonsubstantive changes to its PSD 
rules.
    The Governor of Wyoming submitted revisions to Section 24 of the 
Wyoming Air Quality Standards and Regulations (WAQSR) on March 14, 1995 
to incorporate changes in the Federal PSD permitting regulations for 
PM-10 increments and utility pollution control projects. The State also 
revised the minor source baseline date definition relative to 
particulate matter, which was previously required by State rule to be 
triggered no later than January 1, 1996 if not triggered earlier by the 
first complete PSD permit application, so that it now will be triggered 
no later than January 1, 2001. The State's March 14, 1995 submittal 
also included two new sections to address EPA's general and 
transportation conformity requirements, which EPA will be acting on 
separately.
    This document evaluates the States' submittals for conformity with 
the corresponding Federal regulations and the requirements of the Act. 
In addition, this document provides justification regarding the removal 
of the TSP designation tables in 40 CFR part 81 for Montana, North 
Dakota, Utah, and Wyoming, as well as for the State of South Dakota 
which has been delegated authority to implement the Federal PSD 
permitting regulations in 40 CFR 52.21.

II. This Action

A. Analysis of State Submissions

1. Procedural Background
    The Act requires States to observe certain procedural requirements 
in developing implementation plans and plan revisions for submission to 
EPA. Section 110(a)(2) of the Act provides that each implementation 
plan submitted by a State must be adopted after reasonable notice and 
public hearing. Section 110(l) of the Act similarly provides that each 
revision to an implementation plan submitted by a State under the Act 
must be adopted by such State after reasonable notice and public 
hearing.
    The EPA also must determine whether a submittal is complete and 
therefore warrants further EPA review and action [see section 110(k)(1) 
and 57 FR 13565, April 16, 1992]. The EPA's completeness criteria for 
SIP submittals are set out at 40 CFR part 51, appendix V. The EPA 
attempts to make completeness determinations within 60 days of 
receiving a submission. However, a submittal is deemed complete by 
operation of law under section 110(k)(a)(B) if a completeness 
determination is not made by EPA within six months after receipt of the 
submission.
    Public hearings to entertain public comment on the initial PSD SIP 
revisions were held by Montana on September 16 and November 9, 1994; by 
North Dakota on September 28, 1993; by Utah on August 30, 1994; and by 
Wyoming on December 15, 1994. After these respective public hearings, 
the rule revisions were adopted by each State. The rule revisions were 
formally 

[[Page 55794]]
submitted to EPA for approval on May 22, 1995 from Montana, April 29, 
1994 from North Dakota, February 1, 1995 from Utah, and March 14, 1995 
from Wyoming. Each SIP revision was reviewed by EPA to determine 
completeness shortly after their submittal, in accordance with the 
completeness criteria referenced above. The submittals were found to be 
complete, and letters dated June 26, 1995, June 22, 1994, March 22, 
1995, and May 26, 1995 were forwarded, respectively, to Montana, North 
Dakota, Utah, and Wyoming indicating the completeness of each submittal 
and the next steps to be taken in the processing of each SIP submittal.
2. Evaluation of States' Submittals
    a. PM-10 Increment Revisions. As discussed above, EPA promulgated 
increments for PM-10 on June 3, 1993 (see 58 FR 31622-31638). EPA 
promulgated revisions to the Federal PSD permitting regulations in 40 
CFR 52.21, as well as the PSD permitting requirements that State 
programs must meet in order to be approved into the SIP in 40 CFR 
51.166. EPA or its delegated State programs were required to begin 
implementation of the increments by June 3, 1994, while the 
implementation date for States with SIP-approved PSD permitting 
programs (including Montana, North Dakota, Utah, and Wyoming) will be 
the date on which EPA approves each revised State PSD program 
containing the PM-10 increments. In accordance with 40 CFR 
51.166(a)(6)(i), each State with SIP-approved PSD programs was required 
to adopt the PM-10 increment requirements within nine months of the 
effective date (or by March 3, 1995). For further background regarding 
the PM-10 increments, see the June 3, 1993 Federal Register document.
    (1) Montana's Submittal. In order to address the PM-10 increments, 
the State of Montana revised the following sections of its PSD 
permitting regulations in the Administrative Rules of Montana (ARM): 
16.8.945(3)(c), 16.8.945(21)(d), 16.8.945(24)(d), 16.8.947(1), 
16.8.953(7)(a)(iii), and 16.8.960(4). EPA has reviewed these revisions 
and has found that the revisions address all of the required regulatory 
revisions for PM-10 increments promulgated by EPA on June 3, 1993. Note 
that the State elected not to adopt 40 CFR 51.166(i)(12), which 
provides an exemption from addressing the new PM-10 increments for 
sources who have submitted a PSD permit application which the State has 
determined to be complete before the PM-10 increments take effect. 
Montana's rules do not contain this grandfathering clause, which is 
acceptable.
    (2) North Dakota's Submittal. In order to address the PM-10 
increments, the State of North Dakota revised the following sections of 
its PSD permitting regulations in Chapter 33-15-15-01 of the North 
Dakota Air Pollution Control Rules: Sections 1.c., 1.e.(4), 
1.aa.(2)(c), 2.b., 4.d.(3)(a), and 4.j.(4)(b). EPA has reviewed these 
revisions and has found that the revisions address all of the required 
regulatory revisions for PM-10 increments promulgated by EPA on June 3, 
1993. Note that the State elected not to adopt 40 CFR 51.166(i)(12), 
which provides an exemption from addressing the new PM-10 increments 
for sources who have submitted a PSD permit application which the State 
has determined to be complete before the PM-10 increments take effect. 
North Dakota's rules did not include this grandfathering clause, which 
is acceptable.
    (3) Utah's Submittal. In order to address the PM-10 increments, the 
State of Utah revised the following sections of its PSD permitting 
regulations: the definition of ``net emissions increase'' in UACR R307-
1-1 and Sections 3.6.3.A., 3.6.3.B., 3.6.3.D.(2) and (3), 3.6.4.C.(2), 
3.6.4.D., 3.6.5.E.(2), and 3.6.5.F.(2) in UACR R307-1-3. EPA has 
reviewed these revisions and has found that the revisions adequately 
address all of the required regulatory revisions for PM-10 increments 
promulgated by EPA on June 3, 1993.
    (4) Wyoming's Submittal. In order to address the PM-10 increments, 
the State of Wyoming revised the following sections of its PSD 
permitting rules in Section 24 of the State's regulations: Subsections 
(a)(ix)(B)(III), (a)(xii)(D), (a)(xv)(B), (b)(i)(A)(I), 
(b)(i)(E)(VI)(1)(k), (b)(viii), and (b)(xii)(I). EPA has reviewed these 
revisions and has found that the revisions address all of the required 
regulatory revisions for PM-10 increments promulgated by EPA on June 3, 
1993. Note that the State elected not to adopt the provision of 40 CFR 
51.166(b)(14)(iv) which allows a State to rescind a minor source 
baseline date if it can be shown that the emissions increase from the 
major stationary source, or the net emissions increase from the major 
modification, responsible for triggering that date did not result in a 
significant amount of PM-10 emissions. The State is thus being more 
stringent than the Federal regulations regarding this issue, which is 
acceptable.
    EPA consequently finds that the revised PSD regulations for 
Montana, North Dakota, Utah, and Wyoming adequately address all of the 
required revisions of the June 3, 1993 Federal Register document for 
PM-10 increments. For further details, see the Technical Support 
Document (TSD) accompanying this action.
    b. TSP Area Deletions. Section 107(d) of the 1977 Amendments to the 
Act authorized each State to submit to the Administrator a list 
identifying those areas which (1) do not meet a national ambient air 
quality standard (NAAQS) (nonattainment areas), (2) cannot be 
classified on the basis of available ambient data (unclassifiable 
areas), and (3) have ambient air quality levels better than the NAAQS 
(attainment areas). In 1978, the EPA published the original list of all 
area designations pursuant to section 107(d)(2) (commonly referred to 
as ``section 107 areas''), including those designations for TSP, in 40 
CFR part 81.
    One of the purposes stated in the Act for the section 107 areas is 
for implementation of the statutory requirements for PSD. The PSD 
provisions of part C of the Act generally apply in all section 107 
areas that are designated attainment or unclassifiable (40 CFR 
52.21(i)(3)). Under the PSD program, the air quality in an attainment 
or unclassifiable area is not allowed to deteriorate beyond prescribed 
maximum allowable increases in pollutant concentrations (i.e., 
increments).
    EPA revised the primary and secondary NAAQS for particular matter 
on July 1, 1987 (52 FR 24634), eliminating TSP as the indicator for the 
NAAQS and replacing it with the PM-10 indicator. However, EPA did not 
delete the section 107 areas for TSP listed in 40 CFR part 81 at that 
time because there were no increments for PM-10 promulgated at that 
time.\1\ States were required to continue implementing the TSP 
increments in order to prevent significant deterioration of particulate 
matter air quality until the PM-10 increments replaced the TSP 
increments. With the State adoption and implementation of the PM-10 
increments becoming effective, the TSP area designations generally 
serve no useful purpose relative to the PSD program. Instead, the PM-10 
area designations now serve to properly identify those areas where air 
quality is better than the NAAQS, i.e., ``PSD areas,'' and to provide 
the geographic 

[[Page 55795]]
link necessary for implementation of the PM-10 increments.\2\

    \1\The EPA did not promulgate new PM-10 increments 
simultaneously with the promulgation of the PM-10 NAAQS. Under 
section 166(b) of the Act, EPA is authorized to promulgate new 
increments ``not more than 2 years after the date of promulgation of 
* * * standards.'' Consequently, EPA temporarily retained the TSP 
increments, as well as the section 107 areas for TSP.
    \2\It should be noted that 40 CFR part 81 does not presently 
list all section 107 areas for PM-10. Only those areas designated 
``nonattainment'' appear in the State listings. This is because 
under the listings published by EPA in the Federal Register on 
November 6, 1991, EPA's primary objective was to identify 
nonattainment areas designated as such by operation of law upon 
enactment of the 1990 Amendments. For States having no PM-10 
nonattainment areas designated by operation of law, EPA did not 
include a new PM-10 listing. Nevertheless, section 107(d)(4)(B)(iii) 
mandates that all areas not designated nonattainment for PM-10 by 
operation of law, are designated unclassifiable. The PM-10 
increments apply in any area designated unclassifiable for PM-10.
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    Thus, in the June 3, 1993 Federal Register document in which EPA 
promulgated the PM-10 increments, EPA stated that, for States with SIP-
approved PSD programs, EPA would delete the TSP area designations at 
the same time EPA approves the revision to a State's plan incorporating 
the PM-10 increments. For delegated PSD programs or in States where EPA 
administers the PSD program, the TSP area designations were to be 
deleted after the PM-10 increments became effective in those States 
(i.e., June 3, 1994). In deleting any State's TSP area designations, 
EPA must ensure that the deletion of those designations will not result 
in a relaxation of any control measures that ultimately protect the PM-
10 NAAQS.
    (1) Montana's TSP Areas. Montana has four areas listed in 40 CFR 
part 81 as nonattainment for the TSP standards but which are not 
designated nonattainment for PM-10: the Colstrip area, the Billings 
area, the Great Falls area, and the East Helena area were all 
designated nonattainment for the secondary TSP standard. EPA has 
reviewed the existing approved particulate matter control strategies 
for these areas and has determined that the deletion of the TSP 
nonattainment status for these areas will not result in a relaxation of 
any controls that would adversely impact the PM-10 NAAQS. Consequently, 
EPA believes it is appropriate at this time to delete the TSP 
designations for these areas. If the State subsequently revises any of 
the particulate matter control strategies currently in the SIP for 
these areas, it must submit a SIP revision to EPA for approval that 
must meet all applicable requirements of the Act. EPA will retain for 
PM-10 these four section 107 areas listed in the current TSP table for 
Montana, consistent with the June 3, 1993 Federal Register document 
which requires retention of the TSP baseline areas for PM-10 unless 
revised by the State in accordance with 40 CFR 51.166.
    Montana has three areas in the State designated nonattainment for 
TSP which are also included in nonattainment designations for PM-10: 
the City of Missoula and the Missoula area (the City is designated 
nonattainment for the primary TSP standard and the Missoula area is 
designated nonattainment for the secondary TSP standard), the Butte 
area, and the City of Columbia Falls. The State has adopted PM-10 SIPs 
for all of these areas, and these plans have all been approved by EPA. 
(See 59 FR 2537-2540, January 18, 1994, for Missoula; 59 FR 11550-
11554, March 11, 1994, for Butte; and 59 FR 17700-17703, April 14, 
1994, for Columbia Falls.) Thus, EPA believes it is appropriate at this 
time to delete the TSP area designations for these areas. However, 
there are some discrepancies in the boundaries between the TSP 
nonattainment designations and the PM-10 nonattainment designations for 
the areas of Missoula and Butte. Specifically, the PM-10 nonattainment 
boundaries for the Missoula and Butte areas do not encompass the TSP 
nonattainment boundaries for those same areas. Thus, the area in 
between the TSP nonattainment boundary and the PM-10 nonattainment 
boundaries for these areas could be considered separate section 107 
areas for PM-10. However, after discussing this issue with the State, 
it has been mutually agreed upon that these ``in-between'' areas would 
be incorporated into the ``rest of State'' section 107 designation.
    As stated above, the State has adopted adequate provisions in its 
PSD program for the implementation of the PM-10 increments. Therefore, 
EPA is deleting the State's existing TSP designation table in 40 CFR 
81.327.
    (2) North Dakota's TSP Areas. As stated above, North Dakota has 
adopted and submitted adequate PSD revisions for PM-10 increments. In 
addition, North Dakota had no TSP areas designated as nonattainment. 
Thus, deletion of the TSP area designations will not result in 
relaxation of any TSP controls that would impact the PM-10 NAAQS. Since 
North Dakota also has no PM-10 nonattainment areas designated in the 
State, there is no PM-10 designation table currently in 40 CFR part 81 
for North Dakota. Therefore, EPA is deleting the TSP area designation 
table and is creating a PM-10 area designation table in 40 CFR 81.335. 
EPA will retain for PM-10 the two section 107 areas listed in the 
current TSP table for North Dakota, consistent with the June 3, 1993 
Federal Register document which requires retention of the TSP baseline 
areas for PM-10 unless revised by the State in accordance with 40 CFR 
51.166.
    (3) Utah's TSP Areas. As stated above, Utah has adopted and 
submitted adequate PSD revisions for PM-10 increments. In addition, 
Utah has in place EPA-approved PM-10 SIPs for the two areas in the 
State which were previously designated nonattainment for TSP and which 
are currently designated nonattainment for PM-10: Salt Lake County and 
Davis County. See the July 8, 1994 Federal Register document for 
further details on EPA's approval of the PM-10 SIPs for those areas (59 
FR 35036). Since the State has adopted, and EPA has approved, PM-10 
SIPs for the State's two areas that were designated nonattainment for 
TSP, EPA believes it is appropriate at this time to delete the TSP area 
designations. Therefore, EPA is deleting the State's existing TSP 
designation table in 40 CFR 81.345.
    (4) Wyoming's TSP Areas. As stated above, Wyoming has adopted and 
submitted adequate PSD revisions for PM-10 increments. Wyoming has one 
area listed in 40 CFR part 81 as nonattainment for the TSP secondary 
standards: the Trona Industrial Area. However, this area was not 
subsequently designated nonattainment for PM-10. EPA has reviewed the 
existing approved particulate matter control strategy for the Trona 
Industrial Area and has determined that the deletion of the TSP 
nonattainment status for that area will not result in a relaxation of 
any controls that would adversely impact the PM-10 NAAQS. Consequently, 
EPA believes it is appropriate at this time to delete the TSP area 
designations for Wyoming. If the State subsequently revises any of the 
particulate matter control strategies currently in the SIP for the 
Trona Industrial Area, it must submit a SIP revision to EPA meeting all 
applicable requirements of the Act.
    As discussed further in the TSD, EPA established at the State's 
request three new separate areas under section 107 of the Act for 
particulate matter on January 14, 1993 (see 58 FR 4348), and a fourth 
area was designated under section 107 of the Act on September 12, 1995. 
Since the June 3, 1993 Federal Register document requires retention of 
the TSP baseline areas for PM-10 (unless revised by the State in 
accordance with 40 CFR 51.166), EPA will incorporate those areas, as 
well as the Trona Industrial area, into the existing table for Wyoming 
PM-10 area designations in 40 CFR 81.351.
    (5) South Dakota's TSP Areas. The State of South Dakota was 
delegated authority to implement and enforce the Federal PSD permitting 
regulations in 40 CFR 52.21 on July 6, 1994 (see 59 FR 47260, September 
15, 1994). As 

[[Page 55796]]
discussed above, the PM-10 increments were thus effective in South 
Dakota on June 3, 1994. Therefore, it is appropriate at this time for 
EPA to delete the TSP area designations in 40 CFR part 81 for South 
Dakota. South Dakota has one area listed in 40 CFR part 81 as 
nonattainment for the TSP primary standard: the Rapid City Area. 
However, this area was not subsequently designated nonattainment for 
PM-10. EPA has reviewed the existing approved particulate matter 
control strategy for the Rapid City Area and has determined that the 
deletion of the TSP nonattainment status for that area will not result 
in a relaxation of any controls that would adversely impact the PM-10 
NAAQS. Consequently, EPA believes it is appropriate at this time to 
delete the TSP area designations for South Dakota. If the State 
subsequently revises any of the particulate matter control strategies 
currently in the SIP for the Rapid City Area, it must submit a SIP 
revision to EPA meeting all applicable requirements of the Act.
    Since South Dakota also has no PM-10 nonattainment areas designated 
in the State, there is no PM-10 designation table currently in 40 CFR 
part 81 for South Dakota. Therefore, EPA is deleting the TSP area 
designation table and is creating a PM-10 area designation table in 40 
CFR 81.342. EPA will retain for PM-10 the two section 107 areas listed 
in the current TSP table for South Dakota, consistent with the June 3, 
1993 Federal Register document which requires retention of the TSP 
baseline areas for PM-10 unless revised by the State in accordance with 
40 CFR 52.21.
    c. Utility Pollution Control Projects. On July 21, 1992, EPA 
promulgated revisions to Federal PSD and nonattainment new source 
review (NSR) permitting requirements, as well as to the Federal new 
source performance standard (NSPS) requirements in 40 CFR part 60, 
regarding utility pollution control projects (57 FR 32314-32339). 
Specifically, EPA made changes to the definition of ``major 
modification'' in 40 CFR parts 51 and 52 to set forth the conditions 
under which the addition, replacement, or use at existing utility 
generating units of any system or device whose primary function is the 
reduction of air pollutants (including the switching to a less polluted 
fuel where the primary purpose of the switch will be the reduction of 
air pollutants) will or will not subject the source to preconstruction 
review. Refer to the July 21, 1992 Federal Register document for 
further information. States were not required to adopt revisions to 
implement these changes regarding utility pollution control projects, 
although these changes are in effect in areas where the Federal PSD 
permitting regulations apply. Both North Dakota and Wyoming opted to 
adopt revisions to their PSD programs implementing the July 21, 1992 
Federal Register document.
    (1) North Dakota's Submittal. In order to address the new 
provisions for utility pollution control projects, the State revised 
the following sections of its PSD permitting regulations in Chapter 33-
15-15-01 of the North Dakota Air Pollution Control Rules: Sections 
1.a.(3) and (4), 1.h., 1.i., 1.m., 1.x.(2)(h)-(k), 1.bb., 1.dd., 1.ee., 
and 1.ff. EPA has reviewed these revisions and has found that the 
revisions address all of the regulatory revisions for utility pollution 
control projects promulgated by EPA on July 21, 1992. However, there 
are two definitions in which the State used the term ``administrator of 
EPA'' when, in fact, EPA's PSD regulations allow the State to have 
authority for those decisions. Therefore, EPA is delegating the State 
authority for the following decisions:
    (a) In the definition of ``major modification'' in 33-15-15-
01.1.x.(2)(h)[1] and [2], the State will have authority (rather than 
EPA as stated in North Dakota's rule) to determine whether the 
addition, replacement, or use of a pollution control project at an 
existing electric utility steam generating unit can be excluded from 
being considered a physical change or change in the method of 
operation; and
    (b) In the definition of ``repowering'' in 33-15-15-01.1.ff.(2), 
the State will be the authority (rather than EPA as stated in the 
State's rule) to give expedited consideration to permit applications 
for any source that satisfies the ``repowering'' requirements and is 
granted an extension under section 409 of the Act.
    (2) Wyoming's Submittal. In order to address the new provisions for 
utility pollution control projects, the State revised the following 
sections of its PSD permitting regulations in Section 24 of the State's 
rules: Subsections (a)(x)(H)-(K), (a)(xix) (D) and (E), (a)(xxviii), 
(a)(xxix), (a)(xxx), (a)(xxxi), (a)(xxxii), (a)(xxxiii), (a)(xxxiv), 
and (a)(xxxv). EPA has reviewed these revisions and has found that the 
revisions adequately address all of the regulatory revisions for 
utility pollution control projects promulgated by EPA on July 21, 1992.
    Consequently, EPA is approving the PSD revisions regarding utility 
pollution control projects submitted by North Dakota and Wyoming.
    d. Other PSD SIP Revisions. (1) North Dakota's Submittal. In order 
to address the PSD provisions for municipal waste combustors 
promulgated by EPA on February 11, 1991 (see 56 FR 5506), the State of 
North Dakota revised the definition of ``significant'' in Section 33-
15-15-01.1.hh. of the State's rules. EPA has reviewed the revision and 
has found it consistent with the municipal waste combustor pollutant 
significance levels in 40 CFR 51.166(b)(23). Therefore, EPA is 
approving this revision.
    (2) Utah's Submittal. The State of Utah also made minor 
administrative revisions in its PSD program to the definitions of 
``baseline date,'' ``baseline area,'' and ``significant'' in UACR R307-
1-1 and Sections 3.6.2.B., 3.6.2.D., 3.6.2.E., 3.6.4.A.(1), 3.6.4.C.(1) 
and (2), 3.6.5.A., 3.6.5.B.(1)(a), 3.6.5.C., 3.6.5.D., 3.6.5.E.(1), 
3.6.5.F.(1), and 3.6.6 of UACR R307-1-3. EPA has reviewed these minor 
changes and finds the changes approvable.
    (3) Wyoming's Submittal. In Wyoming's March 14, 1995 SIP submittal, 
the State revised the definition of ``minor source baseline date'' so 
that it will be triggered no later than January 1, 2001. The State had 
previously set the minor source baseline date to be triggered no later 
than January 1, 1996. In any case, the State is not required by EPA to 
set a mandatory minor source baseline date. The State is only required 
to have the minor source baseline date be triggered by the first 
complete PSD permit application for a major stationary source or major 
modification locating in or significantly impacting an attainment/
unclassifiable area designated under section 107 of the Act, and the 
State's definition of ``minor source baseline date'' meets that 
requirement. Thus, since the State definition is more stringent than 
the Federal definition, it is approvable.

III. Final Action

    Based on the review and justification provided in this document, 
EPA is approving the SIP revisions regarding PSD permitting submitted 
by the States of Montana, North Dakota, Utah, and Wyoming on May 22, 
1995, April 29, 1994, February 1, 1995, and March 14, 1995, 
respectively.
    In addition, EPA is deleting the TSP area designation tables and/or 
revising the PM-10 area designation tables in 40 CFR part 81 as 
follows:
    A. For Montana, EPA is deleting the TSP area designation table and 
is adding the Colstrip area, the Billings area, the Great Falls area, 
and the East Helena area to the existing PM-10 area designation table 
as unclassifiable for 

[[Page 55797]]
PM-10 in 40 CFR 81.327.3 In addition, EPA is incorporating the 
area in between the TSP nonattainment boundary and the PM-10 
nonattainment boundary for the Missoula and Butte areas into the ``rest 
of State'' section 107 designation.

    \3\EPA is designating the PM-10 areas as unclassifiable, rather 
than attainment, at this time to be consistent with section 
107(d)(4)(B) of the Act which stated that any area which was not 
initially designated as nonattainment for PM-10 shall be designated 
unclassifiable. EPA will consider redesignating these areas to 
``attainment'' status at a later date. Both ``unclassifiable'' and 
``attainment'' areas have the same status for PSD purposes.
---------------------------------------------------------------------------

    B. For North Dakota, EPA is deleting the TSP area designation table 
and is creating a PM-10 area designation table listing the 
``Metropolitan Fargo-Moorhead (Minn.), AQCR 130'' area and the ``Rest 
of State, AQCR 172'' area as unclassifiable for PM-10 in 40 CFR 
81.335.4

    \4\See footnote number 4.
---------------------------------------------------------------------------

    C. For Utah, EPA is deleting the TSP area designation table in 40 
CFR 81.345.
    D. For Wyoming, EPA is deleting the TSP area designation table and 
is adding the ``Powder River Basin'' area, the ``Pacific Power and 
Light'' area, the ``Hampshire Energy'' area, the ``Kennecott/Puron PSD 
Baseline Area,'' and the ``Trona Industrial'' area to the existing PM-
10 area designation table as unclassifiable for PM-10 in 40 CFR 
81.351.5

    \5\See footnote number 4.
---------------------------------------------------------------------------

    E. For South Dakota, EPA is deleting the TSP area designation table 
and is creating a PM-10 area designation table listing the ``Rapid 
City'' area and the ``Rest of State'' area as unclassifiable for PM-10 
in 40 CFR 81.342.6

    \6\See footnote number 4.
---------------------------------------------------------------------------

    In all of these State's PM-10 area designation tables, EPA is 
clarifying that the ``Rest of State'' areas denote a single area 
designation for PSD baseline area purposes. In addition, EPA is 
revising the headings of all of the PM-10 area designation tables in 40 
CFR part 81 to read as follows: ``[Name of State]--PM-10.''
    EPA is publishing this action without prior proposal because the 
Agency views this as a noncontroversial amendment and anticipates no 
adverse comments. However, in a separate document in this Federal 
Register publication, EPA is proposing to approve the SIP revision 
should adverse or critical comments be filed. Under the procedures 
established in the May 10, 1994 Federal Register (59 FR 24054), this 
action will be effective January 2, 1996 unless, by December 4, 1995, 
adverse or critical comments are received.
    If such comments are received, this action will be withdrawn before 
the effective date by publishing a subsequent document that will 
withdraw the final action. All public comments received will then be 
addressed in a subsequent final rule based on this action serving as a 
proposed rule. EPA will not institute a second comment period on this 
action. Any parties interested in commenting on this action should do 
so at this time. If no such comments are received, the public is 
advised that this action will be effective on January 2, 1996.
    Nothing in this action should be construed as permitting or 
allowing or establishing a precedent for any future request for 
revision to any SIP. Each request for revision to a SIP shall be 
considered separately in light of specific technical, economic, and 
environmental factors and in relation to relevant statutory and 
regulatory requirements.
    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 economic 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.
    Approvals of SIP submittals under section 110 and subchapter I, 
part D of the Clean Air Act do not create any new requirements, but 
simply approve requirements that the State is already imposing. 
Therefore, because the Federal SIP approval does not impose any new 
requirements, I certify that it does not have a significant impact on 
small entities. Moreover, due to the nature of the Federal-state 
relationship under the Clean Air Act, preparation of a regulatory 
flexibility analysis would constitute Federal inquiry into the economic 
reasonableness of state action. The Clean Air Act forbids EPA to base 
its actions concerning SIPs on such grounds. Union Electric Co. v. U.S. 
E.P.A., 427 U.S. 246, 256-66 (1976); 42 U.S.C. 7410(a)(2).
    Under Sections 202, 203, and 205 of the Unfunded Mandates Reform 
Act of 1995 (``Unfunded Mandates Act''), signed into law on March 22, 
1995, EPA must undertake various actions in association with proposed 
or final rules that include a Federal mandate that may result in 
estimated costs of $100 million or more to the private sector, or to 
State, local, or tribal governments in the aggregate.
    Through submission of this state implementation plan or plan 
revision, the State and any affected local or tribal governments have 
elected to adopt the program provided for under Section 110 of the 
Clean Air Act. These rules may bind State, local and tribal governments 
to perform certain actions and also require the private sector to 
perform certain duties. The rules being approved by this action will 
impose no new requirements; such sources are already subject to these 
regulations under State law. Accordingly, no additional costs to State, 
local, or tribal governments, or to the private sector, result from 
this action. EPA has also determined that this final action does not 
include a mandate that may result in estimated costs of $100 million or 
more to State, local, or tribal governments in the aggregate or to the 
private sector.
    Under section 307(b)(1) of the Clean Air Act, petitions for 
judicial review of this action must be filed in the United States Court 
of Appeals for the appropriate circuit by January 2, 1996. Filing a 
petition for reconsideration by the Administrator of this final rule 
does not affect the finality of this rule for the purposes of judicial 
review nor does it extend the time within which a petition for judicial 
review must be filed, and shall not postpone the effectiveness of such 
rule or action. This action may not be challenged later in proceedings 
to enforce its requirements (see section 307(b)(2)).
    This action has been classified as a Table 3 action for signature 
by the Regional Administrator under the procedures published in the 
Federal Register on January 19, 1989 (54 FR 2214-2225), as revised by a 
July 10, 1995 memorandum from Mary Nichols, Assistant Administrator for 
Air and Radiation. The Office of Management and Budget (OMB) has 
exempted this regulatory action from E.O. 12866 review.

List of Subjects

40 CFR Part 52

    Environmental protection, Air pollution control, Incorporation by 
reference, Particulate matter, Reporting and recordkeeping 
requirements, Volatile organic compounds.

40 CFR Part 81

    Air pollution control, National parks, Wilderness areas.

    Dated: September 19, 1995.
Jack W. McGraw,
Acting Regional Administrator.

    Title 40, chapter I of the Code of Federal Regulations is amended 
as follows: 

[[Page 55798]]


PART 52--[AMENDED]

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

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

Subpart BB--Montana

    2. Section 52.1320 is amended by adding paragraph (c)(42) to read 
as follows:


Sec. 52.1320  Identification of plan.

* * * * *
    (c) * * *
    (42) On May 22, 1995, the Governor of Montana submitted revisions 
to the prevention of significant deterioration regulations in the 
Administrative Rules of Montana to incorporate changes in the Federal 
PSD permitting regulations for PM-10 increments.
    (i) Incorporation by reference.
    (A) Revisions to Administrative Rules of Montana (ARM), rules 
16.8.945(3)(c), 16.8.945(21)(d), 16.8.945(24)(d), 16.8.947(1), 
16.8.953(7)(a), and 16.8.960(4), effective 10/28/94.
* * * * *

Subpart JJ--North Dakota

    3. Section 52.1820 is amended by adding paragraph (c)(27) to read 
as follows:


Sec. 52.1820  Identification of plan.

* * * * *
    (c) * * *
    (27) On April 29, 1994, the Governor of North Dakota submitted 
revisions to the prevention of significant deterioration regulations in 
chapter 33-15-15 of the North Dakota Air Pollution Control Rules to 
incorporate changes in the Federal PSD permitting regulations for 
utility pollution control projects, PM-10 increments, and municipal 
waste combustors.
    (i) Incorporation by reference.
    (A) Revisions to Chapter 33-15-15 of the North Dakota Air Pollution 
Control Rules, Section 33-15-15-01, Subsections 1.a.(3) and (4), 1.c, 
1.e.(4), 1.h, 1.i, 1.m, 1.x.(2)(h)-(k), 1.aa.(2)(c), 1.bb, 1.dd, 1.ee, 
1.ff, 1.hh, 2.b, 4.d.(3)(a), and 4.j.(4)(b), effective 3/1/94.

Subpart TT--Utah

    4. Section 52.2320 is amended by adding paragraph (c)(31) to read 
as follows:


Sec. 52.2320  Identification of plan.

* * * * *
    (c) * * *
    (31) On February 1, 1995, the Governor of Utah submitted revisions 
to the prevention of significant deterioration permitting regulations 
in R307-1-1 and R307-1-3 of the Utah Air Conservation Regulations to 
incorporate changes in the Federal PSD permitting regulations for PM-10 
increments and to make other minor, administrative changes.
    (i) Incorporation by reference.
    (A) Revisions to the Utah Air Conservation Regulations, R307-1-1, 
the definitions of ``baseline area,'' ``baseline date,'' ``net 
emissions increase,'' and ``significant,'' effective 9/22/94, printed 
10/24/94.
    (B) Revisions to the Utah Air Conservation Regulations, R307-1-3, 
Sections 3.6.2.B, 3.6.2.D, 3.6.2.E, 3.6.3.A, 3.6.3.B, 3.6.3.D.(2) and 
(3), 3.6.4.A.(1), 3.6.4.C, 3.6.4.D, 3.6.5.A, 3.6.5.B.(1)(a), 3.6.5.C, 
3.6.5.D, 3.6.5.E, 3.6.5.F, and 3.6.6, effective 10/1/94, printed 10/24/
94.

Subpart ZZ--Wyoming

    5. Section 52.2620 is amended by adding paragraph (c)(26) to read 
as follows:


Sec. 52.2620  Identification of plan.

* * * * *
    (c) * * *
    (26) On March 14, 1995, the Governor of Wyoming submitted revisions 
to the prevention of significant deterioration permitting regulations 
in Section 24 of the Wyoming Air Quality Standards to incorporate 
changes in the Federal PSD permitting regulations for utility pollution 
control projects, PM-10 increments, and to make other minor changes.
    (i) Incorporation by reference.
    (A) Revisions to Section 24 of the Wyoming Air Quality Standards, 
subsections (a)(ix)(B), (a)(x)(H)-(K), (a)(xii)(D), (a)(xv), 
(a)(xix)(D) and (E), (a)(xxviii)-(xxxv), (b)(i)(A)(I), 
(b)(i)(E)(VI)(1), (b)(viii), and (b)(xii)(I), effective 2/13/95.

PART 81--[AMENDED]

    1. The authority citation for part 81 continues to read as follows:

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


Secs. 81.302, 81.303, 81.305, 81.306, 81.307, 81.313, 81.314, 81.315, 
81.320, 81.323, 81.327, 81.329, 81.332, 81.336, 81.338, 81.339, 81.344, 
81.345, 81.348, 81.349, 81.351 and 81.355  [Amended]

    2. In each of the following sections, in the heading of the table 
for PM-10 nonattainment areas, the words ``Nonattainment Areas'' are 
removed: Secs. 81.302, 81.303, 81.305, 81.306, 81.307, 81.313, 81.314, 
81.315, 81.320, 81.323, 81.327, 81.329, 81.332, 81.336, 81.338, 81.339, 
81.344, 81.345, 81.348, 81.349, 81.351 and 81.355.


Secs. 81. 327, 81. 335, 81.342, 81.345 and 81.351  [Amended]

    3. Sections 81.327, 81.335, 81.342, 81.345, and 81.351 are further 
amended as follows:
    3-1. By removing the table in each section for TSP;
    3-2. In Secs. 81.327, 81.345, and 81.351 by revising the newly 
renamed table for PM-10 to read as set forth below;
    3-3. In Secs. 81.335 and 81.342 by adding a new table for PM-10 to 
read as set forth below.


Sec. 81.327  Montana.

* * * * *

                                                 Montana--PM-10                                                 
----------------------------------------------------------------------------------------------------------------
                                                          Designation                       Classification      
              Designated area              ---------------------------------------------------------------------
                                                Date                Type                 Date          Type     
----------------------------------------------------------------------------------------------------------------
Cascade County, Great Falls area..........     11/15/90  Unclassifiable............  ...........                
Flathead County:                                                                                                

[[Page 55799]]
                                                                                                                
    The area bounded by lines from             11/15/90  Nonattainment.............     11/15/90  Moderate.     
     Universal Transmercator (UTM)                                                                              
     coordinate 700000mE, 5347000mN, east                                                                       
     to 704000mE, 5347000mN, south to                                                                           
     704000mE, 5341000mN, west to                                                                               
     703000mE, 5341000mN, south to                                                                              
     703000mE, 5340000mN, west to                                                                               
     702000mE, 5340000mN, south to                                                                              
     702000mE, 5339000mN, east to                                                                               
     703000mE, 5339000mN, south to                                                                              
     703000mE, 5338000mN, east to                                                                               
     704000mE, 5338000mN, south to                                                                              
     704000mE, 5336000mN, west to                                                                               
     702000mE, 5336000mN, south to                                                                              
     702000mE, 5335000mN, west to                                                                               
     700000mE, 5335000mN, north to                                                                              
     700000mE, 5340000mN, west to                                                                               
     695000mE, 5340000mN, north to                                                                              
     695000mE, 5345000mN, east to                                                                               
     700000mE, 5345000mN, north to                                                                              
     700000mE, 5347000mN.                                                                                       
    Columbia Falls and vicinity...........     11/15/90  Nonattainment.............     11/15/90  Moderate.     
    Township T30N, R20W--Sections 7, 8, 9,                                                                      
     16, 17, and 18                                                                                             
    The City of Whitefish and surrounding      11/18/93  Nonattainment.............     11/18/93  Moderate.     
     vicinity bounded by lines from                                                                             
     Universal Transmercator (UTM)                                                                              
     coordinates 695000 mE, 5370000 mN,                                                                         
     east to 699000 mE, 5370000 mN, south                                                                       
     to 699000 mE, 5361000 mN, west to                                                                          
     695000 mN, 5361000 mN, and north to                                                                        
     695000 mE, 5370000 mN.                                                                                     
Lake County, Ronan, Polson................     11/15/90  Nonattainment.............     11/15/90  Moderate.     
Lincoln County, Libby and vicinity........     11/15/90  Nonattainment.............     11/15/90  Moderate.     
T30N, R31W--Sections 2, 3, 4, 5, 9, 10,                                                                         
 11, 14, 15, 23, 26, 35, and west \1/2\ of                                                                      
 Section 24, west \1/2\ of Section 25, and                                                                      
 west \1/2\ of Section 36; plus T31N,                                                                           
 R31W--Sections 26, 27, 29, 32, 33, 34, 35                                                                      
 and the east \1/2\ of Section 30.                                                                              
Lewis and Clark County, East Helena area..     11/15/90  Unclassifiable............  ...........  ..............
Missoula County, Missoula and vicinity         11/15/90  Nonattainment.............     11/15/90  Moderate.     
 including the following sections:                                                                              
T13N, R19W--2, 8, 11, 14, 15, 16, 17, 19,                                                                       
 20, 21, 22, 23, 24, 27, 28, 29, 30, 31,                                                                        
 32, 33, and 34; T12N, R19W--Sections 4,                                                                        
 5, 6, 7; T13N, R20W--Sections 23, 24, 25,                                                                      
 26, 35, and 36.                                                                                                
Rosebud County:                                                                                                 
    Lame Deer.............................     11/15/90  Nonattainment.............     11/15/90  Moderate.     
    Colstrip area.........................     11/15/90  Unclassifiable............  ...........                
    Sanders County (part).................      1/20/94  Nonattainment.............      1/20/94  Moderate.     
Thompson Falls and vicinity: Including the                                                                      
 following Sections: R29W, T21N--Sections                                                                       
 5, 6, 7, 8, 9, 10, 15, and 16.                                                                                 
Silver Bow County, Butte..................     11/15/90  Nonattainment.............     11/15/90  Moderate.     
The following area of Butte-Silver Bow                                                                          
 excluding the territorial limits of the                                                                        
 City of Walkerville: Beginning at the                                                                          
 Northwest corner of Section 2, T.3N.,                                                                          
 R.8W., thence Easterly to Northeast                                                                            
 corner Section 5, T.3N., R.7W.; then                                                                           
 Southerly to Northwest corner Section 9,                                                                       
 T.3N., R.7W.; thence Easterly to                                                                               
 Northeast corner Section 10, T.3N.,                                                                            
 R.7W.; thence Southerly to Southeast                                                                           
 corner Section 22, T.2N., R.7W.; thence                                                                        
 Westerly to Southwest corner Section 19,                                                                       
 T.2N., R.7W.; thence Northerly to                                                                              
 Northwest corner Section 19, T.2N.,                                                                            
 R.7W.; thence Westerly to Southwest                                                                            
 corner Section 14, T.2N., R.8W.; thence                                                                        
 Northerly to Southwest corner Section 35,                                                                      
 T.3N., R.8W.; thence Westerly to                                                                               
 Southwest corner Section 34, T.3N.,                                                                            
 R.8W.; thence Northerly to Northwest                                                                           
 corner Section 27, T.3N., R.8W.; thence                                                                        
 Westerly to Southwest corner Section 20,                                                                       
 T.3N., R.8W.; thence Northerly to                                                                              
 Northwest corner Section 17, T.3N.,                                                                            
 R.8W.; thence Easterly to Northwest                                                                            
 corner Section 14, T.3N., R.8W.; thence                                                                        
 Northerly to the point of beginning.                                                                           
Yellowstone County, Billings area.........     11/15/90  Unclassifiable............  ...........                
Rest of State\1\..........................     11/15/90  Unclassifiable............  ...........                
----------------------------------------------------------------------------------------------------------------
\1\Denotes a single area designation for PSD baseline area purposes.                                            


* * * * *


Sec. 81.335  North Dakota.

* * * * *

                                               North Dakota--PM-10                                              
----------------------------------------------------------------------------------------------------------------
                                                          Designation                       Classification      
              Designated area              ---------------------------------------------------------------------
                                                Date                Type                 Date          Type     
----------------------------------------------------------------------------------------------------------------
Metropolitan Fargo-Moorhead (Minn.), AQCR      11/15/90  Unclassifiable............  ...........                
 130.                                                                                                           
Rest of State, AQCR 172\1\................     11/15/90  Unclassifiable............  ...........                
----------------------------------------------------------------------------------------------------------------
\1\Denotes a single area designation for PSD baseline area purposes.                                            

* * * * * 

[[Page 55800]]



Sec. 81.342  South Dakota.

* * * * *

                                               South Dakota--PM-10                                              
----------------------------------------------------------------------------------------------------------------
                                                          Designation                       Classification      
              Designated area              ---------------------------------------------------------------------
                                                Date                Type                 Date          Type     
----------------------------------------------------------------------------------------------------------------
Rapid City Area...........................     11/15/90  Unclassifiable............  ...........                
Rest of State\1\..........................     11/15/90  Unclassifiable............  ...........                
----------------------------------------------------------------------------------------------------------------
\1\Denotes a single area designation for PSD baseline area purposes.                                            

* * * * *


Sec. 81.345  Utah.

* * * * *

                                                   Utah--PM-10                                                  
----------------------------------------------------------------------------------------------------------------
                                                          Designation                       Classification      
              Designated area              ---------------------------------------------------------------------
                                                Date                Type                 Date          Type     
----------------------------------------------------------------------------------------------------------------
Salt Lake County..........................     11/15/90  Nonattainment.............     11/15/90  Moderate.     
Utah County...............................     11/15/90  Nonattainment.............     11/15/90  Moderate.     
Ogden Area Weber County (part) City of          9/26/95  Nonattainment.............      9/26/95  Moderate.     
 Ogden.                                                                                                         
Rest of State\1\..........................     11/15/90  Unclassifiable............  ...........                
----------------------------------------------------------------------------------------------------------------
\1\Denotes a single area designation for PSD baseline area purposes.                                            

* * * * *


Sec. 81.351  Wyoming.

* * * * *

                                                 Wyoming--PM-10                                                 
----------------------------------------------------------------------------------------------------------------
                                                          Designation                       Classification      
              Designated area              ---------------------------------------------------------------------
                                                Date                Type                 Date          Type     
----------------------------------------------------------------------------------------------------------------
Sheridan County:                                                                                                
    City of Sheridan......................     11/15/90  Nonattainment.............     11/15/90  Moderate.     
    Trona Industrial Area.................     11/15/90  Unclassifiable............  ...........                
Campbell County (part)                                                                                          
Converse County (part), That area bounded      11/15/90  Unclassifiable............  ...........                
 by Township 40 through 52 North, and                                                                           
 Ranges 69 through 73 West, inclusive of                                                                        
 the Sixth Principal Meridian, Campbell                                                                         
 and Converse Counties, excluding the                                                                           
 areas defined as the Pacific Power and                                                                         
 Light attainment area and the Hampshire                                                                        
 Energy attainment area.--Powder River                                                                          
 Basin.                                                                                                         
Campbell County (part), That area bounded      11/15/90  Unclassifiable............  ...........                
 by NW1/4 of Section 27, T50N, R71W,                                                                            
 Campbell County, Wyoming.--Pacific Power                                                                       
 and Light Area.                                                                                                
Campbell County (part), That area bounded      11/15/90  Unclassifiable............  ...........                
 by Section 6 excluding the SW\1/4\; E\1/                                                                       
 2\ Section 7; Section 17 excluding the                                                                         
 SW\1/4\; Section 14 excluding the SE\1/                                                                        
 4\; Sections 2, 3, 4, 5, 8, 9, 10, 11,                                                                         
 15, 16 of T48N, R70W and Section 26                                                                            
 excluding the NE\1/4\; SW\1/4\ Section                                                                         
 23; Sections 19, 20, 21, 22, 27, 28, 29,                                                                       
 30, 31, 32, 33, 34, 35 of T49N, R70W.--                                                                        
 Hampshire Energy Area.                                                                                         
Campbell County (part), That area              11/15/90  Unclassifiable............  ...........                
 described by the W\1/2\SW\1/4\ Section                                                                         
 18, W\1/2\NW\1/4\, NW\1/4\SW\1/4\ Section                                                                      
 19, T47N, R70W, S\1/2\ Section 13, N\1/                                                                        
 2\, N\1/2\SW\1/4\, N\1/2\SE\1/4\ Section                                                                       
 24, T47N, R71W.--Kennecott/Puron PSD                                                                           
 Baseline Area.                                                                                                 
Rest of State\1\..........................     11/15/90  Unclassifiable............  ...........                
----------------------------------------------------------------------------------------------------------------
\1\Denotes a single area designation for baseline area purposes.                                                

* * * * *

[[Page 55801]]

[FR Doc. 95-27062 Filed 11-2-95; 8:45 am]
BILLING CODE 6560-50-P