Approval and Promulgation of Implementation Plans; Connecticut

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[CT-7202a; FRL-5902-2]

Approval and Promulgation of Implementation Plans; Connecticut

AGENCY: Environmental Protection Agency (EPA).

ACTION: Direct final rule.

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SUMMARY: The EPA today is approving State Implementation Plan (SIP)

revisions submitted by the State of Connecticut. These revisions

consist of 1990 base year ozone emission inventories, and establishment

of a Photochemical Assessment Monitoring System (PAMS) network.

The inventories were submitted by Connecticut to satisfy a Clean

Air Act (CAA) requirement that States containing ozone nonattainment

areas submit inventories of actual ozone precursor emissions in

accordance with guidance from the EPA. The ozone emission inventories

submitted by Connecticut are for the State's portion of the New York,

New Jersey, Connecticut severe area, and the greater Hartford serious

area. The PAMS SIP revision was submitted to satisfy the requirements

of the CAA and the PAMS regulations. The intended effect of this action

is to approve as a revision to the Connecticut SIP the state's 1990

base year ozone emission inventories, and to approve the PAMS network

into the State's SIP.

DATES: This action is effective on December 23, 1997 unless EPA

receives adverse or critical comments by November 24, 1997. If the

effective date is delayed, timely notice will be published in the

Federal Register.

ADDRESSES: Written comments on this action should be addressed to Susan

Studlien, Deputy Director, Office of Ecosystem Protection,

Environmental Protection Agency, Region I, JFK Federal Building,

Boston, Massachusetts, 02203. Copies of the documents relevant to this

action are available for public inspection during normal business hours

at the EPA Region I office, and at the Connecticut Department of

Environmental Protection, Bureau of Air Management, 79 Elm Street,

Hartford, CT 06106-1630. Persons interested in examining these

documents should make an appointment with the appropriate office at

least 24 hours before the visiting day.

FOR FURTHER INFORMATION CONTACT: Robert F. McConnell, Air Quality

Planning Group, EPA Region I, JFK Federal Building, Boston,

Massachusetts, 02203; telephone (617) 565-9266.

SUPPLEMENTARY INFORMATION: Connecticut submitted its 1990 base year

emission inventories of ozone precursors to the EPA on January 13,

1994, as a revision to the State's SIP. Revisions to the inventories

were received on February 3, 1994, and February 16, 1995. Connecticut

submitted a SIP revision establishing a PAMS network into the State's

overall ambient air quality monitoring network on March 2, 1995. This

notice is divided into four parts:

I. Background Information

II. Analysis of State Submission

III. Final Action

IV. Administrative Requirements

I. Background Information

1. Emission Inventory

Under the CAA as amended in 1990, States have the responsibility to

inventory emissions contributing to NAAQS nonattainment, to track these

emissions over time, and to ensure that control strategies are being

implemented

[[Page 55337]]

that reduce emissions and move areas towards attainment. The CAA

requires ozone nonattainment areas designated as moderate, serious,

severe, and extreme to submit a plan within three years of 1990 to

reduce volatile organic compound (VOC) emissions by 15 percent within

six years after 1990. The baseline level of emissions, from which the

15 percent reduction is calculated, is determined by adjusting the base

year inventory to exclude biogenic emissions, non-reactive VOC

emissions that do not form ozone, and to exclude certain emission

reductions not creditable towards the 15 percent. The 1990 base year

emissions inventory is the primary inventory from which the periodic

inventory, the Reasonable Further Progress (RFP) projection inventory,

and the modeling inventory are derived. Further information on these

inventories and their purpose can be found in the ``Emission Inventory

Requirements for Ozone State Implementation Plans,'' U.S. Environmental

Protection Agency, Office of Air Quality Planning and Standards,

Research Triangle Park, North Carolina, March 1991. The base year

inventory may also serve as part of statewide inventories for purposes

of regional modeling in transport areas. The base year inventory plays

an important role in modeling demonstrations for areas classified as

moderate and above.

The air quality planning requirements for marginal to extreme ozone

nonattainment areas are set out in section 182(a)-(e) of title I of the

CAA. The EPA has issued a General Preamble describing the EPA's

preliminary views on how the agency intends to review SIP revisions

submitted under title I of the Act, including requirements for the

preparation of the 1990 base year inventory (see 57 FR 13502 (April 16,

1992) and 57 FR 18070 (April 28, 1992)). In this action EPA will rely

on the General Preamble's interpretation of the CAA, and the reader

should refer to the General Preamble for a more detailed discussion of

the interpretations of title I advanced in today's rule and the

supporting rationale.

Those States containing ozone nonattainment areas classified as

marginal to extreme are required under section 182(a)(1) of the CAA to

submit a final, comprehensive, accurate, and current inventory of

actual ozone season, weekday emissions from all sources within 2 years

of enactment (November 15, 1992). This inventory is for calendar year

1990 and is denoted as the base year inventory. It includes both

anthropogenic and biogenic sources of volatile organic compound (VOC),

nitrogen oxides (NOX), and carbon monoxide (CO). The

inventory is to address actual VOC, NOX, and CO emissions

for the area during a peak ozone season, which is generally comprised

of the summer months. All stationary point and area sources, as well as

mobile sources within the nonattainment area, are to be included in the

compilation. Available guidance for preparing emission inventories is

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

2. PAMS Network

On March 2, 1995, the Connecticut Department of Environmental

Protection (DEP) submitted to the EPA a SIP revision incorporating PAMS

into the ambient air quality monitoring network of State or Local Air

Monitoring Stations (SLAMS) and National Air Monitoring Stations

(NAMS). The State will establish and maintain PAMS as part of its

overall ambient air quality monitoring network.

Section 182(c)(1) of the CAA and the General Preamble (57 FR 13515)

require that the EPA promulgate rules for enhanced monitoring of ozone,

NOX, and VOCs no later than 18 months after the date of the

enactment of the Act. These rules will provide a mechanism for

obtaining more comprehensive and representative data on ozone air

pollution in areas designated nonattainment and classified as serious,

severe, or extreme.

The final PAMS rule was promulgated by the EPA on February 12, 1993

(58 FR 8452). Section 58.40(a) of the revised rule requires the State

to submit a PAMS network description, including a schedule for

implementation, to the Administrator within six months after

promulgation or by August 12, 1993. Further, Sec. 58.20(f) requires the

State to provide for a PAMS network within nine months after

promulgation of the final rule or by November 12, 1993.

On October 14, 1993, the Connecticut DEP submitted a draft PAMS

network plan. The EPA reviewed the submittal and informed the State it

was approvable and met the requirements of section 58.40(a) via a

letter dated July 21, 1994. On March 2, 1995, Connecticut submitted a

formal amendment to the SIP regarding PAMS Air Quality Monitoring. A

letter finding the submittal complete was sent to the State on April

24, 1995. Since network descriptions may change annually, they are not

part of the SIP as recommended by the document, ``Guideline for the

Implementation of the Ambient Air Monitoring Regulations, 40 CFR part

58'' (EPA-450/4-78-038, OAQPS, November 1979).

Ambient air quality monitoring network descriptions undergo annual

system reviews as required by 40 CFR section 58.20(d). The review

covers the SLAMS, National Air Monitoring Station (NAMS) and PAMS

networks. In addition, 40 CFR section 58.25 pertaining to SLAMS,

section 58.36 pertaining to NAMS, and section 58.46 pertaining to PAMS

each require that any changes to the network description as identified

during the annual review must be approved by EPA.

The Connecticut PAMS SIP revision is intended to meet the

requirements of section 182(c)(1) of the Act and to comply with the

PAMS regulations, codified at 40 CFR part 58. The Connecticut DEP held

a public hearing on the PAMS SIP revision on January 7, 1994.

II. Analysis of State Submission

1. Emission Inventory

A. Procedural Background

The Act requires States to observe certain procedural requirements

in developing emission inventory submissions to the EPA. Section

110(a)(2) of the Act provides that each emission inventory submitted by

a State must be adopted after reasonable notice and public hearing.

1 Final approval of the inventory will not occur until the

State revises the inventory to address public comments. Changes to the

inventory that impact the 15 percent reduction calculation and require

a revised control strategy will constitute a SIP revision. EPA created

a ``de minimis'' exception to the public hearing requirement for minor

changes. EPA defines ``de minimis'' for such purposes to be those in

which the 15 percent reduction calculation and the associated control

strategy or the maintenance plan showing, do not change. States will

aggregate all such ``de minimis'' changes together when making the

determination as to whether the change constitutes a SIP revision. The

State will need to make the change through the formal SIP revision

process, in conjunction with the change to the control measure or other

SIP programs. 2 Section 110(a)(2) of the Act similarly

[[Page 55338]]

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.

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\1\ Also Section 172(c)(7) of the Act requires that plan

provisions for nonattainment areas meet the applicable provisions of

section 110(a)(2).

\2\ Memorandum from John Calcagni, Director, Air Quality

Management Division, and William G. Laxton, Director, Technical

Support Division, to Regional Air Division Directors, Region I-X,

``Public Hearing Requirements for 1990 Base-Year Emission

Inventories for Ozone and Carbon Monoxide Nonattainment Areas,''

September 29, 1992.

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On January 13, 1994, Connecticut submitted to the EPA as a SIP

revision the 1990 base year inventories for its two ozone nonattainment

areas. Prior to the State's submittal of final inventories, the State

had submitted draft inventories to EPA for review during July, August,

and October 1992. EPA reviewed the draft inventories and sent comments

to the state by letter dated November 20, 1992. Revised inventories

were submitted to EPA in January and May of 1993 which addressed many

of EPA's comments. The State held a public hearing on the inventory on

July 20, 1993. EPA reviewed the May submittal and provided comments to

the State through the hearing process by letter dated August 30, 1993.

These comments included comments developed by an EPA contractor's

review of the Connecticut inventories. The contractor's comments are

summarized within a report dated April 16, 1993. Connecticut submitted

its final 1990 base year emission inventories as revisions to the

State's SIP on January 13, 1994. Additional revisions were submitted on

February 3, 1994, and February 16, 1995.

The EPA Region I Office has compared the final Connecticut

inventories with the deficiencies noted in the various comment letters

and concluded that the State has adequately addressed the issues

presented in the comment letters.

B. Emission Inventory Review

Section 110(k) of the CAA sets out provisions governing the EPA's

review of base year emission inventory submittals in order to determine

approval or disapproval under section 182(a)(1) (see 57 FR 13565-13566

(April 16, 1992)). The EPA is approving the Connecticut ozone base year

emission inventories based on the Level I, II, and III review findings.

This section outlines the review procedures performed to determine if

the base year emission inventories are acceptable or should be

disapproved.

The Level I and II review process is used to determine that all

components of the base year inventory are present. The review also

evaluates the level of supporting documentation provided by the State

and assesses whether the emissions were developed according to current

EPA guidance.

The Level III review process is outlined here and consists of 10

points that the inventory must include. For a base year emission

inventory to be acceptable it must pass all of the following acceptance

criteria:

1. An approved Inventory Preparation Plan (IPP) was provided and

the QA program contained in the IPP was performed and its

implementation documented.

2. Adequate documentation was provided that enabled the reviewer to

determine the emission estimation procedures and the data sources used

to develop the inventory.

3. The point source inventory must be complete.

4. Point source emissions must have been prepared or calculated

according to the current EPA guidance.

5. The area source inventory must be complete.

6. The area source emissions must have been prepared or calculated

according to the current EPA guidance.

7. Biogenic emissions must have been prepared according to current

EPA guidance or another approved technique.

8. The method (e.g., Highway Performance Modeling System or a

network transportation planning model) used to develop vehicle miles

travelled (VMT) estimates must follow EPA guidance, which is detailed

in the document, ``Procedures for Emission Inventory Preparation,

Volume IV: Mobile Sources,'' U.S. Environmental Protection Agency,

Office of Mobile Sources and Office of Air Quality Planning and

Standards, Ann Arbor, Michigan, and Research Triangle Park, North

Carolina, December 1992.

9. The MOBILE model (or EMFAC model for California only) was

correctly used to produce emission factors for each of the vehicle

classes.

10. Non-road mobile emissions were prepared according to current

EPA guidance for all of the source categories.

The base year emission inventory will be approved if it passes

Levels I, II, and III of the review process. Detailed Level I and II

review procedures can be found in ``Quality Review Guidelines for 1990

Base Year Emission Inventories,'' U.S. Environmental Protection Agency,

Office of Air Quality Planning and Standards, Research Triangle Park,

NC, July 27, 1992. Level III review procedures are specified in EPA

memoranda noted in the margin. 3

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\3\ Memorandum from J. David Mobley, Chief, Emissions Inventory

Branch, to Air Branch Chiefs, Region I-X, ``Final Emission Inventory

Level III Acceptance Criteria,'' October 7, 1992; and memorandum

from John S. Seitz, Director, Office of Air Quality Planning and

Standards, to Regional Air Division Directors, Region I-X,

``Emission Inventory Issues,'' June 24, 1993.

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The emission inventories prepared by Connecticut for its two,

serious ozone nonattainment areas meet each of Level III's ten

criteria. Documentation of the EPA's evaluation, including details of

the review procedure, is contained within the technical support

document prepared for the Connecticut 1990 base year inventory, which

is available to the public as part of the docket supporting this

action.

2. PAMS Network

The Connecticut PAMS SIP revision will provide the State with the

authority to establish and operate the PAMS sites, will secure State

funds for PAMS, and will provide the EPA with the authority to enforce

the implementation of PAMS, since its implementation is required by the

Act.

The criteria used to review the proposed SIP revision are derived

from the PAMS regulations, codified at 40 CFR Part 58, and are included

in ``Guideline for the Implementation of the Ambient Air Monitoring

Regulations, 40 CFR part 58'' (EPA-450/4-78-038, Office of Air Quality

Planning and Standards, November 1979), the September 2, 1993,

memorandum from G. T. Helms entitled, ``Final Boilerplate Language for

the PAMS SIP Submittal,'' the CAA, and the General Preamble.

The September 2, 1993, Helms memorandum stipulates that the PAMS

SIP, at a minimum, must:

1. Provide for monitoring of criteria pollutants, such as ozone and

nitrogen dioxide and non-criteria pollutants, such as nitrogen oxides,

speciated VOCs, including carbonyls, as well as meteorological

parameters;

2. Provide a copy of the approved (or proposed) PAMS network

description, including the phase-in schedule, for public inspection

during the public notice and/or comment period provided for in the SIP

revision or, alternatively, provide information to the public upon

request concerning the State's plans for implementing the rules;

3. Make reference to the fact that PAMS will become a part of the

State or local air monitoring stations (SLAMS) network;

4. Provide a statement that SLAMS will employ Federal reference

methods (FRM) or equivalent methods while most PAMS sampling will be

conducted using methods approved by the EPA.

The Connecticut PAMS SIP revision provides that the State will

implement PAMS as required in 40 CFR part 58, as amended February 12,

1993. The State will amend its SLAMS and its NAMS monitoring systems to

include the PAMS requirements. It will develop its PAMS network design

and establish monitoring sites pursuant to 40 CFR

[[Page 55339]]

part 58 in accordance with an approved network description and as

negotiated with the EPA through the 105 grant process on an annual

basis. The State has begun implementing its PAMS network as required in

40 CFR part 58.

The Connecticut PAMS SIP revision also includes a provision to meet

quality assurance requirements as contained in 40 CFR part 58, Appendix

A. The State's SIP revision also assures EPA that the PAMS monitors

will meet monitoring methodology requirements contained in 40 CFR part

58, Appendix C. Lastly, the State's SIP revision requires that the

Connecticut PAMS network will be phased in over a period of five years

as required in 40 CFR 58.44. The State's PAMS SIP submittal and the

EPA's technical support document are available for viewing at the EPA

Region I Office as outlined under the ADDRESSES section of this Federal

Register document. The Connecticut PAMS SIP submittal is also available

for viewing at the Connecticut State Office as outlined under the

ADDRESSES section of this Federal Register document.

III. Final Action

1. Emission Inventory

Connecticut has submitted complete inventories containing point,

area, biogenic, on-road mobile, and non-road mobile source data, and

accompanying documentation. Emissions from these sources are presented

in the following table:

VOC \4\

[Ozone Seasonal Emissions in Tons Per Day]

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Point On-road Non-road

NAA Area source source mobile mobile Biogenic Total

emissions emissions emissions emissions emissions

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NY-NJ-CT.......................... 59.42 8.67 43.83 20.95 54.41 187.28

Hartford.......................... 178.05 33.74 127.12 78.44 383.39 800.74

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\4\ Note that these VOC inventory numbers include emissions of perchloroethylene. EPA has determined that

perchloroethylene is photochemically non-reactive and does not significantly contribute to ozone production.

Therefore, these inventory numbers have been adjusted to remove emissions of this compound in the proposed

conditional approval of Connecticut's 15 percent plans published elsewhere in today's Federal Register.

NOX

[Ozone Seasonal Emissions in Tons Per Day]

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

Point On-road Non-road

NAA Area source source mobile mobile Biogenic Total

emissions emissions emissions emissions emissions

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NY-NJ-CT.......................... 2.73 43.72 55.73 15.73 NA 117.91

Hartford.......................... 8.07 87.31 175.56 82.61 NA 353.55

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CO

[Ozone Seasonal Emissions in Tons Per Day]

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

Point On-road Non-road

NAA Area source source mobile mobile Biogenic Total

emissions emissions emissions emissions emissions

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NY-NJ-CT......................... 3.51 13.09 356.87 165.52 NA 538.99

Hartford......................... 10.90 20.30 1,032.9 530.41 NA 1,594.51

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Connecticut has satisfied all of the EPA's requirements for

providing a comprehensive, accurate, and current inventory of actual

ozone precursor emissions in the Connecticut portion of the NY-NJ-CT

severe area and the Hartford serious ozone nonattainment area. The

inventories are complete and approvable according to the criteria set

out in the November 12, 1992 memorandum from J. David Mobley, Chief

Emission Inventory Branch, TSD to G. T. Helms, Chief Ozone/Carbon

Monoxide Programs Branch, AQMD. In today's final action, the EPA is

approving the SIP 1990 base year ozone emission inventories submitted

by Connecticut for the state's portion of the NY-NJ-CT severe area and

the Hartford serious nonattainment area as meeting the requirements of

section 182(a)(1) of the CAA.

2. PAMS Network

In today's action, the EPA is fully approving the revision to the

Connecticut ozone SIP for PAMS.

The EPA is publishing these actions without prior proposal because

the Agency views them as noncontroversial amendments and anticipates no

adverse comments. However, in a separate document in this Federal

Register publication, the EPA is proposing to approve these SIP

revisions and is soliciting public comment on them. This action will be

effective December 23, 1997 unless, by November 24, 1997, adverse or

critical comments are received.

If the EPA receives such comments, this action will be withdrawn

before the effective date by publishing a subsequent document that will

withdraw the final actions. All public comments received will be

addressed in a subsequent final rule based on this action serving as a

proposed rule. The 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 December 23, 1997.

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 the SIP shall be

[[Page 55340]]

considered separately in light of specific technical, economic, and

environmental factors and in relation to relevant statutory and

regulatory requirements.

IV. Administrative Requirements

A. Executive Order 12866

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.

B. Regulatory Flexibility Act

Under the Regulatory Flexibility Act, 5 U.S.C. Sec. 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. Secs. 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.

SIP approvals 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, the

Administrator certifies that it does not have a significant impact on

any small entities affected. Moreover, due to the nature of the

Federal-State relationship under the CAA, preparation of a 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.

EPA, 427 U.S. 246, 255-66 (1976); 42 U.S.C. 7410(a)(2).

C. Unfunded Mandates

Under Section 202 of the Unfunded Mandates Reform Act of 1995

(``Unfunded Mandates Act''), signed into law on March 22, 1995, EPA

must prepare a budgetary impact statement to accompany any proposed or

final rule that includes a Federal mandate that may result in estimated

costs to State, local, or tribal governments in the aggregate; or to

the private sector, of $100 million or more. Under Section 205, EPA

must select the most cost-effective and least burdensome alternative

that achieves the objectives of the rule and is consistent with

statutory requirements. Section 203 requires EPA to establish a plan

for informing and advising any small governments that may be

significantly or uniquely impacted by the rule.

EPA has determined that the approval action promulgated does not

include a Federal mandate that may result in estimated costs of $100

million or more to either State, local, or tribal governments in the

aggregate, or to the private sector. This Federal action approves pre-

existing requirements under State or local law, and imposes no new

requirements. Accordingly, no additional costs to State, local, or

tribal governments, or to the private sector, result from this action.

D. Submission to Congress and the General Accounting Office

Under 5 U.S.C. 801(a)(1)(A) as added by the Small Business

Regulatory Enforcement Fairness Act of 1996, EPA submitted a report

containing this rule and other required information to the U.S. Senate,

the U.S. House of Representatives and the Comptroller General of the

General Accounting Office prior to publication of the rule in today's

Federal Register. This rule is not a ``major rule'' as defined by 5

U.S.C. 804(2).

E. Petitions for Judicial Review

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 December 23, 1997. 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 may 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).) EPA encourages

interested parties to comment in response to the proposed rule rather

than petition for judicial review, unless the objection arises after

the comment period allowed for in the proposal.

List of Subjects in 40 CFR Part 52

Environmental protection, Air pollution control, Carbon monoxide,

Hydrocarbons, Incorporation by reference, Nitrogen dioxide, Ozone,

Reporting and recordkeeping requirements.

Note: Incorporation by reference of the State Implementation

Plan for the State of Connecticut was approved by the Director of

the Federal Register on July 1, 1982.

Dated: September 19, 1997.

John P. DeVillars,

Regional Administrator, Region I.

40 CFR Part 52 is amended as follows:

PART 52--[AMENDED]

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

Authority: 42 U.S.C. 7401-7641q.

Subpart H--Connecticut

2. Section 52.370 is amended by adding paragraph (c)(74) to read as

follows:

* * * * *

Sec. 52. 370 Identification of plan.

(c) * * *

(74) A revision to the Connecticut SIP regarding ozone monitoring.

Connecticut will modify its SLAMS and its NAMS monitoring systems to

include a PAMS network design and establish monitoring sites.

Connecticut's SIP revision satisfies 40 CFR 58.20(f) PAMS requirements.

(i) Incorporation by reference.

(A) PAMS SIP Commitment Narrative, which incorporates PAMS into the

ambient air quality monitoring network of State or Local Air Monitoring

Stations (SLAMS) and National Air Monitoring Stations (NAMS).

(ii) Additional material.

(A) Letter from the Connecticut Department of Environmental

Protection dated March 2, 1995 submitting a revision to the Connecticut

State Implementation Plan.

3. Section 52.384 is added to read as follows:

Sec. 52.384 Emission inventories.

(a) The Governor's designee for the State of Connecticut submitted

the 1990 base year emission inventories for the Connecticut portion of

the New York-New Jersey-Connecticut severe ozone nonattainment area and

the Hartford serious ozone nonattainment area on January 13, 1994 as

revisions to the State's Implementation Plan (SIP). Revisions to the

inventories were submitted on February 3, 1994 and February 16, 1995.

The 1990 base year emission inventory requirement of section 182(a)(1)

of the Clean Air Act, as amended in 1990, has been satisfied for these

areas.

(b) The inventories are for the ozone precursors which are volatile

organic compounds, nitrogen oxides, and carbon monoxide. The

inventories

[[Page 55341]]

covers point, area, non-road mobile, on-road mobile, and biogenic

sources.

(c) Taken together, the Connecticut portion of the New York-New

Jersey-Connecticut severe nonattainment area and the Hartford serious

nonattainment area encompass the entire geographic area of the State.

[FR Doc. 97-27855 Filed 10-23-97; 8:45 am]

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