[Federal Register Volume 62, Number 134 (Monday, July 14, 1997)]
[Rules and Regulations]
[Pages 37510-37514]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-18408]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 52
[MA-7197a; FRL-5847-1]
Approval and Promulgation of Implementation Plans; Massachusetts
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 Commonwealth of Massachusetts. 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 the Commonwealth 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 the Commonwealth are for the Springfield
serious area, and the Massachusetts portion of the Boston-Lawrence-
Worcester 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 Massachusetts
SIP the state's 1990 base year ozone emission inventories, and to
approve the PAMS network into the State's SIP.
DATES: This action will become effective on September 12, 1997 unless
notice is received by August 13, 1997 that adverse or critical comments
will be submitted. 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 Massachusetts Department of
Environmental Protection, Division of Air Quality Control, One Winter
Street, 7th Floor, Boston, Massachusetts, 02108-4746. 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: Massachusetts submitted its 1990 base year
emission inventories of ozone precursors to the EPA on November 13,
1992. Revisions to the inventories were received on November 15, 1993,
November 15, 1994, and March 31, 1997. The Commonwealth submitted a SIP
revision establishing a PAMS network into the State's overall ambient
air quality monitoring network on November 15, 1993. This document 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 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 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
[[Page 37511]]
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 November 15, 1993, the Massachusetts 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 Commonwealth 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 the establishment and maintenance of a PAMS
network within nine months after promulgation of the final rule or by
November 12, 1993.
On December 30, 1993, the Massachusetts DEP submitted a PAMS
network description. The EPA sent the Commonwealth a letter on May 17,
1994 finding the submittal administratively complete. This submittal
was reviewed and approved on July 21, 1994 by the EPA and was judged to
satisfy the requirements of section 58.40(a). 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). However, the network description is negotiated
and approved during the annual review as required by 40 CFR sections
58.25 and 58.36, respectively, and any revision must be reviewed as
provided at 40 CFR section 58.46.
The Massachusetts 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 Massachusetts DEP
held several public hearings on the PAMS SIP revision during October,
1993.
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 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 November 13, 1992, the Commonwealth of Massachusetts submitted
to the EPA as a SIP revision the 1990 base year inventories for the two
serious ozone nonattainment areas. Prior to the Commonwealth's
submittal of final inventories to the EPA on November 13, 1992, the
State had submitted draft inventories to EPA on May 1, 1992. EPA
reviewed the draft inventories and sent comments to the state by letter
dated September 1, 1992. The revised inventories submitted to EPA on
November 13, 1992, addressed many of EPA's comments. EPA reviewed the
November 13, 1992 submittal and provided comments to the State through
the hearing process by letter dated August 5, 1993. These comments
included comments developed by an EPA contractor's review of the
Massachusetts inventories. The contractor's comments are summarized
within reports dated April 12 and May 25, 1993. Massachusetts submitted
revisions to its final 1990 base year emission inventories on November
15, 1993, November 15, 1994, and March 31, 1997. The State held several
public hearings on the emission inventories, the last of which occurred
on February 13 and 14, 1997.
The EPA Region I Office has compared the final Massachusetts
inventories with the deficiencies noted in the various comment letters
and concluded that Massachusetts 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 Massachusetts ozone base
year emission inventories submitted to the EPA in final form on
November 15, 1994, based on the Levels 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 Levels 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
[[Page 37512]]
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 Massachusetts 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 Massachusetts 1990 base year inventory, which
is available to the public as part of the docket supporting this
action.
2. PAMS Network
The Massachusetts PAMS SIP revision will provide the Commonwealth
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 Massachusetts PAMS SIP revision provides that the Commonwealth
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 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
Commonwealth has begun implementing its PAMS network as required in 40
CFR part 58.
The Massachusetts PAMS SIP revision also includes a provision to
meet quality assurance requirements as contained in 40 CFR part 58,
Appendix A. The Commonwealth's SIP revision also assures EPA that the
State's PAMS monitors will meet monitoring methodology requirements
contained in 40 CFR part 58, Appendix C. Lastly, the Commonwealth's SIP
revision requires that the Massachusetts PAMS network will be phased in
over a period of five years as required in 40 CFR section 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
Commonwealth's PAMS SIP submittal is also available for viewing at the
Massachusetts State Office as outlined under the ``Addresses'' section
of this Federal Register document.
III. Final Action
1. Emission Inventory
Massachusetts 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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Springfield....................... 52.64 13.71 62.24 29.59 277.22 435.40
[[Page 37513]]
Bos-Law-Wor....................... 313.42 50.57 286.54 177.46 374.02 1202.01
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\4\ Note that these VOC inventory numbers include emissions of perchloroethylene and acetone. EPA has determined
that these VOCs are photochemically non-reactive and do not significantly contribute to ozone production.
Therefore, these inventory numbers have been adjusted to remove emissions of these VOCs in the proposed
conditional interim approval of Massachusetts' 15 percent plan published elsewhere in today's Federal
Register.
NOX
[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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Springfield....................... 4.40 19.29 74.48 19.90 NA 118.07
Bos-Law-Wor....................... 28.09 298.77 332.30 156.28 NA 815.44
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CO
[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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Springfield....................... 7.93 6.70 484.31 178.22 NA 677.16
Bos-Law-Wor....................... 45.51 33.62 2064.06 1176.46 NA 3319.65
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Massachusetts has satisfied all of the EPA's requirements for
providing a comprehensive, accurate, and current inventory of actual
ozone precursor emissions in the Springfield and Boston-Lawrence-
Worcester serious ozone nonattainment areas. 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 the
Commonwealth for the Springfield area and the Massachusetts portion of
the Boston-Lawrence-Worcester 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
Massachusetts 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 September 12, 1997 unless, by August 13, 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 Septermber 12, 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
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. 600 et. seq., EPA
must prepare a regulatory flexibility analysis assessing the impact of
any proposed or final rule on small entities. 5 U.S.C. 603 and 604.
Alternatively, EPA may certify that the rule will not have a
significant impact on a substantial number of small entities. Small
entities include small businesses, small not-for-profit enterprises,
and government entities with jurisdiction over populations of less than
50,000.
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
[[Page 37514]]
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 Sections 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 September 12, 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 Massachusetts was approved by the Director of
the Federal Register on July 1, 1982.
Dated: June 13, 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 W--Massachusetts
2. Section 52.1120 is amended by adding paragraph (c)(113) to read
as follows:
Sec. 52.1120 Identification of plan.
* * * * *
(c) * * *
(113) A revision to the Massachusetts SIP regarding ozone
monitoring. The Commonwealth of Massachusetts will modify its SLAMS and
its NAMS monitoring systems to include a PAMS network design and
establish monitoring sites. The Commonwealth's SIP revision satisfies
40 CFR 58.20(f) PAMS requirements.
(i) Incorporation by reference.
(A) Massachusetts PAMS Network Plan, 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 Massachusetts Department of Environmental
Protection dated December 30, 1993 submitting a revision to the
Massachusetts State Implementation Plan.
3. Section 52.1125 is added to read as follows:
Sec. 52.1125 Emission inventories.
(a) The Governor's designee for the Commonwealth of Massachusetts
submitted the 1990 base year emission inventories for the Springfield
nonattainment area and the Massachusetts portion of the Boston-
Lawrence-Worcester ozone nonattainment area on November 13, 1992 as a
revision to the State Implementation Plan (SIP). Revisions to the
inventories were submitted on November 15, 1993, and November 15, 1994,
and March 31, 1997. 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 covers point, area, non-road mobile, on-road mobile, and
biogenic sources.
(c) Taken together, the Springfield nonattainment area and the
Massachusetts portion of the Boston-Lawrence-Worcester nonattainment
area encompass the entire geographic area of the State. Both areas are
classified as serious ozone nonattainment areas.
[FR Doc. 97-18408 Filed 7-11-97; 8:45 am]
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