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Federal Register / Vol. 86, No. 13 / Friday, January 22, 2021 / Proposed Rules
infrastructure SIPS for the 1997 and 2006 PM2.5.
Finally, EPA is proposing to approve SIP revisions submitted by Maine that provide the states determination, via a negative declaration for the 2008 and 2015 ozone standards, that there are no facilities within its borders subject to EPAs 2016 Control Technique Guideline CTG for the oil and gas industry.
This action is being taken under the Clean Air Act.
DATES: Written comments must be received on or before February 22, 2021.
ADDRESSES: Submit your comments, identified by Docket ID No. EPAR01
OAR20200327 at https
www.regulations.gov, or via email to simcox.alison@epa.gov. 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, the 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. The 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. Publicly available docket materials are available at https www.regulations.gov or at the U.S. Environmental Protection Agency, EPA Region 1 Regional Office, Air and Radiation Division, 5 Post Office SquareSuite 100, Boston, MA. EPA
requests that if at all possible, you contact the contact listed in the FOR
FURTHER INFORMATION CONTACT section to schedule your inspection. The Regional Offices official hours of business are Monday through Friday, 8:30 a.m. to 4:30 p.m., excluding legal holidays and facility closures due to COVID19.
FOR FURTHER INFORMATION CONTACT:
Alison C. Simcox, Air Quality Branch, U.S. Environmental Protection Agency,
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EPA Region 1, 5 Post Office Square Suite 100, Mail code 052, Boston, MA
021093912, tel. 617 9181684, email simcox.alison@epa.gov.
SUPPLEMENTARY INFORMATION:
Throughout this document whenever we, us, or our is used, we mean EPA.
Table of Contents I. Background and Purpose A. What is the scope of this rulemaking?
B. What guidance did EPA use to evaluate Maines Infrastructure SIP for the 2015
ozone standard?
II. EPAs Evaluation of Maines Infrastructure SIP for the 2015 Ozone Standard A. Section 110a2AEmission Limits and Other Control Measures B. Section 110a2BAmbient Air Quality Monitoring/Data System C. Section 110a2CProgram for Enforcement of Control Measures and for Construction or Modification of Stationary Sources D. Section 110a2DInterstate Transport E. Section 110a2EAdequate Resources F. Section 110a2FStationary Source Monitoring System G. Section 110a2GEmergency Powers H. Section 110a2HFuture SIP
Revisions I. Section 110a2INonattainment Area Plan or Plan Revisions Under Part D
J. Section 110a2JConsultation With Government Officials; Public Notifications; Prevention of Significant Deterioration; Visibility Protection K. Section 110a2KAir Quality Modeling/Data L. Section 110a2LPermitting Fees M. Section 110a2MConsultation/
Participation by Affected Local Entities N. Maine Regulations Submitted for Incorporation Into the SIP
III. EPAs Evaluation of Maines Negative Declaration for the Oil and Gas Industry for the 2008 and 2015 Ozone Standards IV. Proposed Action V. Incorporation by Reference VI. Statutory and Executive Order Reviews
I. Background and Purpose Maines Infrastructure SIP for the 2015 ozone standard.
On October 1, 2015, EPA promulgated a revision to the ozone NAAQS 2015
ozone NAAQS, lowering the level of both the primary and secondary standards to 0.070 parts per million ppm.1 Section 110a1 of the CAA
requires states to submit, within 3 years after promulgation of a new or revised standard, SIPs meeting the applicable 1 National Ambient Air Quality Standards for Ozone, Final Rule, 80 FR 65292 October 26, 2015.
Although the level of the standard is specified in the units of ppm, ozone concentrations are also described in parts per billion ppb. For example, 0.070 ppm is equivalent to 70 ppb.

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requirements of section 110a2.2 On February 14, 2020, the Maine Department of Environmental Protection Maine DEP submitted a revision to the Maine State Implementation Plan SIP.
The SIP revision addresses the infrastructure requirements of CAA
sections 110a1 and 110a2 for the 2015 ozone NAAQS.
Maines Negative declaration for the Oil and Natural Gas Industry for the 2008 and 2015 ozone standards.
On October 27, 2016, EPA published in the Federal Register the Final Control Techniques Guidelines for the Oil and Natural Gas Industry. See 81
FR 74798. The CTG provided information to state, local, and tribal air agencies to assist them in determining reasonably available control technology RACT for volatile organic compound VOC emissions from select oil and natural gas industry emission sources.
CAA section 182b2A requires that, for ozone nonattainment areas classified as Moderate or above, states must revise their SIPs to include provisions to implement RACT for each category of VOC sources covered by a CTG
document. CAA section 184b1B
extends the RACT obligation to all areas of states within the Ozone Transport Region OTR. Pursuant to CAA section 184a, Maine is a member state of the OTR. States subject to RACT
requirements are required to adopt controls that are at least as stringent as those found in the CTG either by adopting regulations or issuing singlesource Orders or Permits that outline what the source is required to do to meet RACT. If no source for a specified CTG exists in a state, the state must submit, as a SIP revision, a negative declaration documenting this fact. On May 18, 2020, Maine DEP submitted for approval into the Maine SIP, a negative declaration for the 2016 CTG for the Oil and Natural Gas Industry for the 2008
and 2015 ozone standards.
A. What is the scope of this rulemaking?
EPA is proposing to approve SIP
revisions submitted by Maine on February 14, 2020, addressing the infrastructure requirements of CAA
sections 110a1 and 110a2 for the 2015 ozone NAAQS, except the transport provisions which will be addressed in a future action.
Additionally, we are proposing to approve a regulation ambient air quality standards submitted by Maine on May 28, 2019, and a statute conflict2 SIP revisions that are intended to meet the applicable requirements of section 110a1 and 2
of the CAA are often referred to as infrastructure SIPs and the applicable elements under 110a2
are referred to as infrastructure requirements.

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