Environmental
Air Quality

Why It Matters to Us

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Explanation of the material topic and its Boundary

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Air emissions associated with our fleet, onsite equipment, and other aspects of our operations can affect local air quality. We carefully monitor our local air emissions and sources to capitalize on innovative opportunities to improve our systems and processes. We work with regulators, communities, and other stakeholders to decrease our impact and reduce local air emissions.

For information related to greenhouse gas emissions, see Climate and GHG Emissions.

What We Are Doing

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The management approach and its components

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We monitor operational air emissions in compliance with relevant state and federal regulations. We use this data to inform the continuous improvement of our processes and procedures. Individual permits require activity and emission data tracking and, in some cases, our historical data inventories date back to 2011. Across our operations, we continue to implement new and improved technologies that lead to more efficient processes and reduce local air emissions.

Governance

Our environmental program is managed by our Director, Environmental, Health, and Safety (EHS) — who is responsible for the oversight and management of all aspects of our environmental footprint. Our environmental program is ultimately guided by the Public Policy and Corporate Responsibility Committee of the Board of Directors and by our management-level Environmental, Social, and Governance Committee. The Air Quality team, within the EHS department, is responsible for air quality permitting, compliance, and reporting. The Public Policy and Corporate Responsibility Committee receives quarterly reports on environmental progress such as emission reports, notices of violations, and strategic initiatives directed at improving our emissions profile.

Permits and Monitoring

Prior to construction or operation at a new wellsite location, we may be required to obtain air quality and other operational permits. When we receive a new permit, our Operations group reviews the permit to identify all future compliance responsibilities. We communicate permit requirements to our field workers, who collect and upload data into our Environmental Management System. We track emissions, obligations, limits, and other air quality requirements using our Environmental Management System and third-party software. We review the Environmental Management System monthly and identify improved processes for tracking and entering information. To gain better insight into tracking, analyzing, and projecting our emissions, we built a proprietary emissions model in 2021 that enables all of our employees to view or export our emissions data from a centralized data repository. The emissions model allows us to both track our historical emissions and project emissions up to five years into the future based on our current assets and production schedule.

Electrifying Our Fracturing Fleets

In alignment with our focus on decreasing completion costs and minimizing environmental impact, we began the process of transitioning to electric hydraulic fracturing (frac) fleets in 2019. In 2020, we completed the transition from diesel to electric power for substantially all of our frac fleets. These electric frac fleets use onsite natural gas to power a portion of our completions operations and have eliminated approximately 23 million gallons of diesel fuel from our operations annually and removed several thousand water hauling track runs from the roadways. Using onsite natural gas to power our frac fleets enables us to reduce local air emissions, decrease our carbon footprint, reduce trucks on the road, and capture proven operational efficiencies.

How We Are Doing

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Evaluation of the management approach

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Audits and Reporting

We conduct inspections and audits to review compliance obligations and improve our operations. Our Corporate Audit group periodically selects internal programs or processes to audit. In reviewing findings, lessons learned can be applied to similar facilities via a Plan-Do-Check-Act cycle of continuous improvement.

Where required, we submit emissions reports and, in some cases, permit compliance certifications to applicable regulatory authorities. We submit annual emissions reports to the U.S. Environmental Protection Agency and we report relevant emissions in applicable states.

Inspections and Benchmarking

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Nitrogen oxides, sulfur oxides, and other significant air emissions

SASB EM-EP-120a.1
Air emissions of the following pollutants: (1) NOx (excluding N2O), (2) SOx, (3) volatile organic compounds (VOCs), and (4) particulate matter (PM10)

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SASB EM-EP-120a.1

Our Air Quality team periodically inspects worksite locations to evaluate air quality compliance. This team also meets with state regulators to confirm alignment with state air quality regulations. We participate in a network of industry and regulatory groups to stay abreast of emerging regulations. Our EHS department also conducts internal inspections of our facilities and sites and field personnel perform periodic leak detection and repair inspections, as described in Climate and Greenhouse Gas Emissions.

We benchmark our air emissions against our peers to identify potential improvement areas and evaluate our primary sources of internal emissions across our operating regions. In areas of success, we consult with state regulators and share best practices through our engagement in the Environmental Partnership and Our Nation's Energy Future.

We aim for 100% facility compliance with all permit requirements and emissions limitations and we review any operational incidents and notices of violation. We use stack test data, manufacturers’ data, and published emissions factors to calculate our air emissions.

Significant Air Emissions
 

Metric

Unit of Measure 2018 2019

2020

2021

(EQT)

2021

(Alta Assets)

Production Segment Emissions

Nitrogen oxides (NOx)

kilograms

3,413,603

1,378,736

1,209,315 894,214 296,649

tons

3,762

1,519

1,333 986 327

Sulfur oxides (SO2)

kilograms

4,157

1,882

6,177 4,045 907

tons

5

2

7 4 1

Volatile organic compounds (VOC)

kilograms

1,646,913

1,593,584

1,204,410  1,121,226  26,943

tons

1,815

1,756

1,327  1,236  30

Hazardous air pollutants (HAP)

kilograms

117,680

115,394

120,592 84,441 1,724

tons

130

127

133 93

Particulate matter (PM)

kilograms

112,352

44,590

37,052 86,645 13,880 

tons

124

49

41 96 15 

Carbon monoxide (CO)

kilograms

949,086

487,436

369,009 422,179 113,761 

tons

1,045

537

406 465 125 

Formaldehyde

kilograms

23,856

22,038

6,456 1,210 91 

tons

26

24

7 1 <1 

Gathering and Boosting Segment Emissions

Nitrogen oxides (NOx)

kilograms

79,893

85,888

 70,770 76,886 81,583

tons

88

95

 78 85 90 

Sulfur oxides (SO2)

kilograms

785

1,654

239 185 553 

tons

< 1

2

 <1  <1

Volatile organic compounds (VOC)

kilograms

63,826

65,656

 79,319 118,873 44,026

tons

70

72

 87 131  49 

Hazardous air pollutants (HAP)

kilograms

11,779

10,195

 12,283  10,892  36,922

tons

13

11

 13  12  41

Particulate matter (PM)

kilograms

5,612

8,644

3,817   2,915  7,629

tons

6

10

 4 3

Carbon monoxide (CO)

kilograms

16,244

22,003

 10,805  31,893  31,325

tons

18

24

11   35  35

Formaldehyde

kilograms

5,978

6,402

 6,872  15,486 19,350 

tons

7

7

 8 17 21 
Air Emissions Intensities (air emissions [tons]/gross production of hydrocarbons [BCFE])[1]

Metric

2018 2019

2020

2021 (EQT)

2021

(Alta Assets)

Production Segment Air Emissions Intensities

Nitrogen oxides (NOx)

2.16

0.84

0.69 0.50 1.47 

Sulfur oxides (SO2)

< 0.01

< 0.01

<0.01 <0.01 <0.01 

Volatile organic compounds (VOC)

1.04

0.97

0.68 0.63  0.13 

Hazardous air pollutants (HAP)

0.07

0.07

0.07 0.05 0.01

Particulate matter (PM)

0.07

0.03

0.02 0.05  0.07

Carbon monoxide (CO)

0.60

0.30

0.21 0.24 0.56

Formaldehyde

0.01

0.01

<0.01 <0.01  <0.01 

Gathering and Boosting Segment Air Emissions Intensities

Nitrogen oxides (NOx)

0.05

0.05

0.04  0.04  0.40

Sulfur oxides (SO2)

< 0.00

< 0.00

 <0.01 <0.01   <0.01

Volatile organic compounds (VOC)

0.04

0.04

 0.04  0.07  0.22

Hazardous air pollutants (HAP)

0.01

0.01

 0.01  0.01  0.18

Particulate matter (PM)

< 0.00

0.01

 <0.01  <0.01 0.04 

Carbon monoxide (CO)

0.01

0.01

 0.01  0.02  0.16

Formaldehyde

< 0.00

< 0.00

 <0.00 0.01  0.09 

[1] Our intensity metrics are calculated based on emissions emitted divided by gross production of hydrocarbons (billion cubic feet of natural gas equivalent). While there is no standard formula for calculating emissions intensity, we believe gross production (as opposed to net production) is the most accurate representation for calculating emissions intensity because gross production is a measure of the actual volume of hydrocarbons produced from the wells we operate.

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