[Federal Register Volume 84, Number 170 (Tuesday, September 3, 2019)]
[Proposed Rules]
[Pages 45931-45933]
[FR Doc No: 2019-18828]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R03-OAR-2019-0429; FRL-9999-08-Region 3]

Approval and Promulgation of Air Quality Implementation Plans;
Delaware; Amendments to the Regulatory Definition of Volatile Organic
Compounds

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to
approve a state implementation plan (SIP) revision submitted by the
State of Delaware. This revision pertains to amendments made to the
definition of volatile organic compounds (VOC) in the Delaware
Administrative Code to conform with EPA's regulatory definition of VOC.
EPA found that certain compounds have a negligible photochemical
reactivity and, therefore, has exempted them from the regulatory
definition of VOC in several rulemaking actions. This revision to the
Delaware SIP requests the exemption of eight compounds from the
regulatory definition of VOC to match the actions EPA has taken. In
addition, the revision also requests to remove the recordkeeping,
reporting, modeling, and inventory requirements for t-butyl acetate
(TBAC). This action is being taken under the Clean Air Act (CAA).

DATES: Written comments must be received on or before October 3, 2019.

ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R03-
OAR-2019-0429 at https://www.regulations.gov, or via email to
<EMAIL_ADDRESS>For comments submitted at Regulations.gov,
follow the online instructions for submitting comments. Once submitted,
comments cannot be edited or removed from Regulations.gov. For either
manner of submission, EPA may publish any comment received to its
public docket. Do not submit electronically any information you
consider to be confidential business information (CBI) or other
information whose disclosure is restricted by statute. Multimedia
submissions (audio, video, etc.) must be accompanied by a written
comment. The written comment is considered the official comment and
should include discussion of all points you wish to make. EPA will
generally not consider comments or comment contents located outside of
the primary submission (i.e. on the web, cloud, or other file sharing
system). For additional submission methods, please contact the person
identified in the For Further Information Contact section. For the full
EPA public comment policy, information about CBI or multimedia
submissions, and general guidance on making effective comments, please
visit https://www.epa.gov/dockets/commenting-epa-dockets.

FOR FURTHER INFORMATION CONTACT: Erin Malone, Planning & Implementation
Branch (3AD30), Air & Radiation Division, U.S. Environmental Protection
Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103.
The telephone number is<PHONE_NUMBER>. Ms. Malone can also be reached
via electronic mail at<EMAIL_ADDRESS>
SUPPLEMENTARY INFORMATION: On March 25, 2019, the State of Delaware,
through the Department of Natural Resources and Environmental Control
(DNREC), formally submitted a revision to its SIP requesting that the
definition of VOC in the Delaware SIP be updated to conform with
several EPA rulemakings that exempted multiple compounds from the
Federal definition of VOC in 40 CFR 51.100(s). The March 25, 2019 SIP
revision requested that the definition of VOC in the Delaware SIP be
updated to add the following compounds to the list of compounds
excluded from the definition of VOC: trans-1,3,3,3-tetrafluoropropene
(HFO-1234ze); HFE-134 (HCF2OCF2H); HFE-236cal2
(HCF2OCF2OCF2H); HFE-338pcc13
(HCF2OCF2CF2OCF2H); H-
Galden 1040X or H-Galden ZT 130 or (150 or 180)
(HCF2OCF2OCF2CF2OCF2
H); trans 1-chloro-3,3,3-trifluoroprop-1-ene; 2,3,3,3-
tetrafluoropropene; and 2-amino-2-methyl-1-propanol. These compounds
were excluded from the Federal regulatory definition of VOC in 40 CFR
51.100(s) by EPA in several rulemakings, which are discussed in more
detail later in this notice of proposed rulemaking (NPRM). DNREC's
March 25, 2019 SIP revision also requested to delete the recordkeeping,
reporting, and modeling requirements for TBAC.

I. Background

    VOCs are organic compounds of carbon that, in the presence of
sunlight, react with sources of oxygen molecules, such as nitrogen
oxides (NOX) and carbon monoxide (CO), in the atmosphere to
produce tropospheric ozone, commonly known as smog. Common sources that
may emit VOCs include paints, coatings, housekeeping and maintenance
products, and building and furnishing materials. Outdoor emissions of
VOCs are regulated by EPA primarily to prevent the formation of ozone.
    VOCs have different levels of volatility, depending on the
compound, and react at different rates to produce varying amounts of
ozone. VOCs that are non-reactive or of negligible reactivity to form
ozone react slowly and/or form less ozone; therefore, reducing their
emissions has limited effects on local or regional ozone pollution.
Section 302(s) of the CAA specifies that EPA has the authority to
define the meaning of VOC and what compounds shall be treated as VOCs
for regulatory purposes.
    It is EPA's policy that organic compounds with a negligible level
of reactivity should be excluded from the regulatory definition of VOC
in order to focus control efforts on compounds that significantly
affect ozone concentrations. EPA uses the reactivity of ethane as the
threshold for

determining whether a compound has negligible reactivity. Compounds
that are less reactive than, or equally reactive to, ethane under
certain assumed conditions may be deemed negligibly reactive and,
therefore, suitable for exemption by EPA from the regulatory definition
of VOC. The policy of excluding negligibly reactive compounds from the
regulatory definition of VOC was first laid out in the ``Recommended
Policy on Control of Volatile Organic Compounds'' (42 FR 35314, July 8,
1977) and was supplemented subsequently with the ``Interim Guidance on
Control of Volatile Organic Compounds in Ozone State Implementation
Plans'' (70 FR 54046, September 13, 2005). The regulatory definition of
VOC as well as a list of compounds that are designated by EPA as
negligibly reactive can be found at 40 CFR 51.100(s).
    On June 22, 2012 (77 FR 37610), EPA promulgated a final rule
revising the regulatory definition of VOC in 40 CFR 51.100(s) to add
trans-1,3,3,3-tetrafluoropropene (also known as HFO-1234ze) to the list
of compounds excluded from EPA's regulatory definition of VOC. HFO-
1234ze is used as a refrigerant, an aerosol propellant, and a blowing
agent for insulating foam. On February 12, 2013 (78 FR 9823), EPA
promulgated a final rule revising the regulatory definition of VOC in
40 CFR 51.100(s) to add HCF2OCF2H (also known as
HFE-134), HCF2OCF2OCF2H (also known as
HFE-236cal2),
HCF2OCF2CF2OCF2H (also
known as HFE-338pcc13), and
HCF2OCF2OCF2CF2OCF2
H (also known as H-Galden 1040X or H-Galden ZT 130 (or 150 or 180)), to
the list of compounds excluded from EPA's regulatory definition of VOC.
These four compounds can be used in some heat transfer applications (as
refrigerants) and as fire suppressants.
    On August 28, 2013 (78 FR 53029), October 22, 2013 (78 FR 62451),
and March 27, 2014 (79 FR 17037), EPA promulgated final rulemakings
revising the regulatory definition of VOC in 40 CFR 51.100(s) to add
trans 1-chloro-3,3,3-trifluoroprop-1-ene (also known as Solstice\TM\
1233zd(E)), 2,3,3,3-tetrafluoropropene (also known as HFO-1234yf), and
2-amino-2-methyl-1-propanol (also known as AMP; CAS number 124-68-5),
respectively, to the list of compounds excluded from the EPA's
regulatory definition of VOC. Solstice\TM\ 1233zd(E) can be used as a
solvent in aerosol and non-aerosol applications, as a blowing agent in
insulating foams, and as a refrigerant. HFO-1234yf can be used as a
refrigerant for refrigeration and air-conditioning. AMP can be used in
a variety of applications including in industries involved in the
manufacture or use of pigments in water-based coatings, as an additive
in metalworking fluids, in food contact paper, as a neutralizer in
personal care products, and as an intermediate in chemical synthesis.
    These actions were based on EPA's consideration of the compounds'
negligible contribution to tropospheric ozone formation as well as the
low likelihood of risk to human health or the environment. EPA's
rationale for these actions is explained in more detail in the final
rules for these actions.
    On September 30, 1999, EPA proposed to revise the regulatory
definition of VOC in 40 CFR 51.100(s) to exclude TBAC as a VOC 64 FR
52731. In most cases, when a negligibly reactive VOC is exempted from
the definition of VOC, emissions of that compound are no longer
recorded, collected, or reported to states or the EPA as part of VOC
emissions. However, EPA's final rule excluded TBAC from the definition
of VOC for purposes of VOC emissions limitations or VOC content
requirements but continued to define TBAC as a VOC for purposes of all
recordkeeping, emissions reporting, photochemical dispersion modeling,
and inventory requirements that apply to VOCs, 69 FR 69298 (November
29, 2004) (2004 Final Rule).
    On February 25, 2016, EPA revised the regulatory definition of VOC
under 40 CFR 51.100(s) to remove TBAC's recordkeeping, emissions
reporting, photochemical dispersion modeling, and inventory
requirements 81 FR 9339 (2016 Final Rule).

II. Summary of SIP Revision and EPA Analysis

    In order to conform with EPA's current regulatory definition of VOC
in 40 CFR 51.100(s), Delaware amended the definition of VOC in 7 DE
Admin. Code 1101--Definitions and Administrative Principles, to add
trans-1,3,3,3-tetrafluoropropene (HFO-1234ze); HFE-134
(HCF2OCF2H); HFE-236cal2
(HCF2OCF2OCF2H); HFE-338pcc13
(HCF2OCF2CF2OCF2H); H-
Galden 1040X or H-Galden ZT 130 or (150 or 180)
(HCF2OCF2OCF2CF2OCF2
H); trans 1-chloro-3,3,3-trifluoroprop-1-ene; 2,3,3,3-
tetrafluoropropene; and 2-amino-2-methyl-1-propanol to the list of
compounds excluded from the regulatory definition of VOC. Delaware also
amended the definition of VOC in 7 DE Admin. Code 1101 to remove TBAC's
recordkeeping, emissions reporting, photochemical dispersion modeling,
and inventory requirements. These revisions were adopted by Delaware on
October 12, 2016 and were effective November 11, 2016. DNREC formally
submitted these amendments to the regulatory definition of VOC as a SIP
revision on March 25, 2019. EPA determined DNREC's submission to be
administratively and technically complete in the Agency's May 28, 2019
correspondence to DNREC.\1\
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    \1\ The Agency's May 28, 2019 completeness letter contained a
minor discrepancy when referring to the number of compounds being
added to the exemption list in the definition of VOC. The letter
erroneously stated that five compounds were being added and then
listed the eight compounds that were being added. That statement
should have read ``DNREC's requested revisions are to add eight
additional compounds to the list of exclusions from the VOC
definition. . .''
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    Delaware's amendments to the definition of VOC in 7 DE Admin. Code
are in accordance with EPA's regulatory changes to the definition of
VOC in 40 CFR 51.100(s) and are therefore approvable for the Delaware
SIP in accordance with CAA Section 110. Additionally, EPA has already
made the determination that trans-1,3,3,3-tetrafluoropropene (HFO-
1234ze); HFE-134 (HCF2OCF2H); HFE-236cal2
(HCF2OCF2OCF2H); HFE-338pcc13
(HCF2OCF2CF2OCF2H); H-
Galden 1040X or H-Galden ZT 130 or (150 or 180)
(HCF2OCF2OCF2CF2OCF2
H); trans 1-chloro-3,3,3-trifluoroprop-1-ene; 2,3,3,3-
tetrafluoropropene; and 2-amino-2-methyl-1-propanol are of negligible
reactivity and therefore have low contributions to ozone as well as a
low likelihood of risk to human health or the environment, and that
removing these chemicals from the definition of VOC in the Delaware SIP
will not interfere with attainment of any national ambient air quality
standard (NAAQS), reasonable further progress, or any other requirement
of the CAA.
    The 2016 Final Rule stated that the recordkeeping, reporting,
modeling, and inventory requirements that remained for TBAC are of
limited utility because they do not provide sufficient information to
judge the cumulative impacts of exempted compounds and because the data
have not been consistently captured and reported. Thus, the addition of
these compounds to the list of compounds excluded from the regulatory
definition of VOC as well as the removal of the recordkeeping,
reporting, modeling, and inventory requirements for TBAC are in
accordance with CAA Section 110(l).

III. Proposed Action

    EPA's review of the submitted material indicates the revision
updated the regulatory definition of VOC in the

Delaware SIP to add trans-1,3,3,3-tetrafluoropropene (HFO-1234ze); HFE-
134 (HCF2OCF2H); HFE-236cal2
(HCF2OCF2OCF2H); HFE-338pcc13
(HCF2OCF2CF2OCF2H); H-
Galden 1040X or H-Galden ZT 130 or (150 or 180)
(HCF2OCF2OCF2CF2OCF2
H); trans 1-chloro-3,3,3-trifluoroprop-1-ene; 2,3,3,3-
tetrafluoropropene; and 2-amino-2-methyl-1-propanol to the list of
compounds excluded from the regulatory definition of VOC. The revision
also updates the regulatory definition of VOC in the Delaware SIP to
remove the recordkeeping, emissions reporting, photochemical dispersion
modeling, and inventory requirements for TBAC. EPA is proposing to
approve Delaware's SIP revision, which was submitted on March 25, 2019,
because the stated revisions to the definition of VOC meet the
requirements of CAA section 110. EPA is soliciting public comments on
the issues discussed in this rulemaking action. These comments will be
considered before taking final action.

IV. Incorporation by Reference

    In this document, EPA is proposing to include in a final EPA rule
regulatory text that includes incorporation by reference. In accordance
with requirements of 1 CFR 51.5, EPA is proposing to incorporate by
reference the updated definition of VOC in 7 DE Admin. Code 1101--
Definitions and Administrative Principles, which adds trans-1,3,3,3-
tetrafluoropropene (HFO-1234ze); HFE-134
(HCF2OCF2H); HFE-236cal2
(HCF2OCF2OCF2H); HFE-338pcc13
(HCF2OCF2CF2OCF2H); H-
Galden 1040X or H-Galden ZT 130 or (150 or 180)
(HCF2OCF2OCF2CF2OCF2
H); trans 1-chloro-3,3,3-trifluoroprop-1-ene; 2,3,3,3-
tetrafluoropropene; and 2-amino-2-methyl-1-propanol to the excluded
compounds list and removes the recordkeeping, emissions reporting,
photochemical dispersion modeling, and inventory requirements for TBAC
in the regulatory definition of VOC in the Delaware SIP. EPA has made,
and will continue to make, these materials generally available through
https://www.regulations.gov and at the EPA Region III Office (please
contact the person identified in the For Further Information Contact
section of this preamble for more information).

V. Statutory and Executive Order Reviews

    Under the CAA, the Administrator is required to approve a SIP
submission that complies with the provisions of the CAA and applicable
Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in
reviewing SIP submissions, EPA's role is to approve state choices,
provided that they meet the criteria of the CAA. Accordingly, this
action merely approves state law as meeting Federal requirements and
does not impose additional requirements beyond those imposed by state
law. For that reason, this proposed action:
     Is not a ``significant regulatory action'' subject to
review by the Office of Management and Budget under Executive Orders
12866 (58 FR 51735, October 4, 1993) and 13563 (76 FR 3821, January 21,
2011);
     Is not an Executive Order 13771 (82 FR 9339, February 2,
2017) regulatory action because SIP approvals are exempted under
Executive Order 12866.
     Does not impose an information collection burden under the
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
     Is certified as not having a significant economic impact
on a substantial number of small entities under the Regulatory
Flexibility Act (5 U.S.C. 601 et seq.);
     Does not contain any unfunded mandate or significantly or
uniquely affect small governments, as described in the Unfunded
Mandates Reform Act of 1995 (Pub. L. 104-4);
     Does not have Federalism implications as specified in
Executive Order 13132 (64 FR 43255, August 10, 1999);
     Is not an economically significant regulatory action based
on health or safety risks subject to Executive Order 13045 (62 FR
19885, April 23, 1997);
     Is not a significant regulatory action subject to
Executive Order 13211 (66 FR 28355, May 22, 2001);
     Is not subject to requirements of Section 12(d) of the
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272
note) because application of those requirements would be inconsistent
with the CAA; and
     Does not provide EPA with the discretionary authority to
address, as appropriate, disproportionate human health or environmental
effects, using practicable and legally permissible methods, under
Executive Order 12898 (59 FR 7629, February 16, 1994).
    In addition, this proposed rule, amending the definition of VOC in
the Delaware SIP to conform with the regulatory definition of VOC in 40
CFR 51.100(s), does not have tribal implications as specified by
Executive Order 13175 (65 FR 67249, November 9, 2000), because the SIP
is not approved to apply in Indian country located in the state, and
EPA notes that it will not impose substantial direct costs on tribal
governments or preempt tribal law.

List of Subjects in 40 CFR Part 52

    Environmental protection, Air pollution control, Carbon monoxide,
Incorporation by reference, Intergovernmental relations, Nitrogen
dioxide, Ozone, Reporting and recordkeeping requirements, Volatile
organic compounds.

    Authority: 42 U.S.C. 7401 et seq.

    Dated: August 20, 2019.
Cosmo Servidio,
Regional Administrator, Region III.
[FR Doc. 2019-18828 Filed 8-30-19; 8:45 am]
 BILLING CODE 6560-50-P