Seneca Resources Company, LLC

Onshore Production, Gathering & Boosting, and Natural Gas Processing
Best Management Practice Commitment Option
Methane Challenge Partner Since 2018

OMB Control No. 2060 0722
Approval expires 08/31/2021

9 SENECA

Resources

Background

Seneca Resources Company, LLC (Seneca), the exploration and production segment of National Fuel Gas
Company, explores for, develops and produces natural gas and oil reserves in California and the
Appalachian Region including the Marcellus and Utica Shales. Seneca is committed to reducing methane
emissions and to limit its environmental footprint. Since joining EPA voluntary methane reduction programs,
Seneca has documented methane reduction strategies totaling 888,468 Mcf from 2015 through 2017. In 2018
Seneca has expanded its participation in voluntary methane reduction strategies which will be aimed at
continuous improvement.

Methane Reduction:
Substitute Pneumatic Devices



U 300,000



¦



J 225,000







^ 150,000

V







3

75,000
0

¦ III

2015 2016 2017 Cumulative

Historical Highlights

Substitute Pneumatic Devices
with Low or Zero-bleed
Devices

Seneca has identified and categorized its pneumatic
controllers. In total, 950 of these devices have been
substituted to low or zero-bleed controllers, This has
resulted in a methane reduction of 310,755 Mcf.

Artificial Lift: Plungers/
Foaming Agents/ Nitrogen Lift

Seneca proactively utilizes several artificial lift
technologies in an effort to maximize the well's
flowing performance which minimizes potential
methane emissions. Some of these technologies
include installing plunger lifts, employing foaming
agents, and utilizing nitrogen lift procedures. This
methane reduction strategy has resulted in 199,630
Mcf of reduced emissions,

Template last updated: 24 August 2018

EPA Form No. 5900 413

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Seneca Resources Company, LLC Historical Fact Sheet

Eliminate unnecessary
equipment and/or systems

Seneca regularly reviews engineering and design
of both existing and new facilities and equipment in
order to identify opportunities to eliminate
redundant and/or unnecessary equipment, Past
improvements have included compression
systems, produced water tanks, test/bulk
separators, and gas processing equipment,
Through these engineering improvements, Seneca
has been able to achieve a methane reduction of
121,718 Mcf,



Methane Reduction:
Decommissioned Equipment



150,000
120,000







2









c

CO

90,000









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