6560-50-P 

ENVIRONMENTAL PROTECTION AGENCY 

40 CFR Part 49, 51, 52, 60, 70, and 71 

[EPA-HQ-OAR-2013-0685; EPA-HQ-OAR-2010-0505; EPA-1-IQ-OAR-2014-0606; EPAI-IQ-OAR-2015-0216; FRL- ] 

Source Determination for Certain Emission Units in the Oil and Natm·al Gas Sector; Oil 

and Natural Gas Sector: Emission Standards for New and Modified Sources; Review of 

New Sounes and Modifications in Indian Country: Federal Implementation Plan for 

Managing Air Emissions from True Mino1· Sources Engaged in Oil and Natural Gas 

Production in Indian Country; and Release of Draft Control Techniques Guidelines for the 

Oil and Natural Gas Industry 

AGENCY: Environmental Protection Agency (EPA). 

ACTION: Proposed rule; extension of comment period. 

SUMMARY: On September 18, 2015, the Environmental Protection Agency (EPA) proposed 

three rules titled, "Source Determination i:or Certain Emission Units in the Oil and Natural Gas 

Sector," "Oil and Natural Gas Sector: Emission Standards tor New and Modified Sources," and 

"Review ofNew Sources and Modifications in Indian Country: Federal Implementation Plan for 

Managing Air Emissions from True Minor Sources Engaged in Oil and Natural Gas Production 

in Indian Country." The EPA also announced the avai lability of a draft Control Techniques 

Guidelines (CTG) document titled, "Release of Draft Control Techniques Guidelines for the Oil 

and Natural Gas Industry," in a notice published on September 18, 2015. The EPA is extending 

the comment period on the three proposed rules and the notice of availability of the draft CTG 

document that was scheduled to close on November 17,2015. The EPA has received several 

letters from trade and business organizations, states and tribes requesting additional time to 

review and comment on the three proposed rule revisions, and the notice of availability of the 

draft CTG document. 

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DATES: The public comment period for the three proposed rul es and notice of availability ofthe 

CTG document published in the Federal Reg;ster on September 18, 20 15 (80 FR 56579, 80 FR 

56593, 80 FR 56553 and 80 FR 56577), is being extended. Written comments must be received 

on or before December 4, 20 15. 

ADDRESSES: The EPA has established separate dockets for each of the three proposed 

rulemakings and the draft CT'G document (available at http://www.regulations.gov). For the 

proposed rulemaking titled, "Source Determination for Certain Emission Units in the Oil and 

Natural Gas Sector," the Docket ID No. is EPA-HQ-OAR-2013-0685. For the proposed 

rulemaking titled, "Oil and Natural Gas Sector: Emission Standards for New and Modified 

Sources," the Docket ID No. is EPA-HQ-OAR-2010-0505. For the proposed rulemaking titled, 

"Review ofNew Sources and Modifications in Indian Country: Federal implementation Plan for 

Managing Air Emissions from True Minor Sources Engaged in Oil and Natural Gas Production 

in Indian Country," the Docket ID No. is EPA-HQ-OAR-2014-0606. For the notice of 

availability titled, "Release of Draft Control Techniques Guidelines for the Oil and Natural Gas 

Industry," the Docket ID No. is EPA-HQ-OAR-20 15-0216. Information on all of these actions is 

posted at ht!p:l/www. epa.gov/airqualityloilandgas/actions. html. Submit your comments, 

identified by the appropriate Docket ID, to the Federal eRulemaking Portal: 

http://www.regulations.gov. Follow the online instructions for submitting comments. Once 

submitted, comments cannot be edited or withdrawn. 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. If you need to include CBI as part of your comment, please visit 

http://www.epa.gov/docket.s!comments.html for instructions. Multimedia submissions (audio, 

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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. 

For additional submission methods, the full EPA public comment policy, and general 

guidance on making effective comments, please visit 

http://www.epa.govldockets/comments.html. 

FOR FlJRTHER INFORMATION CONTACT: For additional information on this action, 

contact Cheryl Vetter, Office of Air Quality Planning and Standards, Environmental Protection 

Agency (C504-03), Research Triangle Park, North Carolina 2771 1; telephone number (91 9) 541-

4391; fax number (919) 541-5509; email address: vefler.cheryl@epa.gov. 

SUPPLEMENTARY INFORMATION: 

After considering the requests to extend the public comment period received from various 

trade and business organizations, states and tribes, the EPA has decided to extend the public 

comment period until December 4, 2015. This extension will ensure that the public has 

additional time to review the three proposed rules and the draft CTG document. 

11-5--/) 

Dated: 

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