DAQ-2024-007366

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DAQC-PBR035840001-23
Site ID 3584 (B1)
MEMORANDUM

TO: FILE – OVINTIV USA, INC. – Ute Tribal 7-19-4-1

THROUGH: Rik Ombach, Minor Source Oil and Gas Compliance Manager

FROM: Stephen Foulger, Environmental Scientist

DATE: December 7, 2023

SUBJECT: OIL AND GAS PERMIT-BY-RULE EVALUATION

INSPECTION DATE: November 2, 2023

SOURCE LOCATION: Ute Tribal 7-19-4-1
Lat: 40.12208 Long: -110.03515

Business Office:
370 17th Street, Suite 1700
Denver, CO 80202

SOURCE TYPE: Tank Battery
Duchesne County
API: 4301333780

SOURCE CONTACTS: Brandon Lithgoe, Local Contact
Phone: [phone], Email: [e-mail]
Ryan Zillner, Local Contact
Phone: [phone], Email: [e-mail]

OPERATING STATUS: Operating

PROCESS DESCRIPTION: Oil and gas products are brought to the surface. These products
go through a separator where the oil and any water products are
sent to storage tanks and the gas is used to power equipment on
site (pump jack engine, tank heater, separator, flare, combustor,
etc.) Any remaining gas is sent to a pipeline that feeds a local gas
plant. The oil and process water in the storage tanks is loaded
into tanker trucks and hauled off-site for processing and disposal.

APPLICABLE REGULATIONS: Utah Administrative Code (UAC) R307-500 Series for the Oil
and Gas Industry, and UAC R307-201: Emission Standards:
General Emission Standards; and UAC R307-150: Emission
Inventories, and 40 CFR 60 Subpart OOOO.

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SOURCE EVALUATION: Site Type: PBR-Uncontrolled
No Flare Controls
Site powered by engine
The source registered: 3,199 Estimated Oil BBL.

DOGM current 12 month rolling production is: 1,046
Utah Statute R307-506 requires a source with throughput
greater than 8,000 BBLs to have controls.

REGISTERED EQUIPMENT: Engine - Engine - Natural Gas 2-Stroke Lean Burn Make - Ajax
Model - E-42 Mfg Year - 1962 Horse Power - 40 Combustion -
Natural Gas, Pneumatic, Tank
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15 Oil and Gas Industry General Provisions

The source adheres to general requirements for prevention of emissions and use of good air
pollution control practices. [R307-501]

Out of Compliance: Emissions found coming from crude oil tank thief hatch and tank top
gathering line.

Oil and Gas Industry Registration Requirement

16 The source is registered with the DAQ. [R307-505-3(3)]

In Compliance. This source was found properly registered with the DAQ at the time of
inspection.

17 Registration has been updated within 30 days of a company name change, removal or addition of
control devices, or termination of operations. [R307-505-3(3)]

In Compliance. This source was found properly registered with the DAQ at the time of
inspection.

18 Storage Vessels

19 Thief hatches are kept closed and latched. [R307-506-4(1)]

In Compliance. Thief hatches were found closed and latched at the time of inspection.

23 Upon modification, the well site was re-evaluated against the thresholds of R307-506-4(2).
[R307-506-4(6)]

In Compliance. Source has removed combustor after production dropped below appropriate
levels.
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46 Visible Emissions

47 Visible emissions, except for unavoidable irregularities that do not exceed three minutes, are within the
following opacity limits:
Installations constructed on or before 4/25/1971 40%
Installations constructed after 4/25/1971 20%
Gasoline engines 0%
Diesel engines manufactured after 1/1/1973 20%
Diesel engines manufactured before 1/1/1973 40%
Note: Required VOC control devices shall have no visible emissions per R307-508-3.[R307-201-3]

In Compliance. No visible emissions were observed at the time of inspection.
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55 Emission Inventory:

56 An emissions inventory has been submitted within the past three years. [R307-150-9(1)]

Out of Compliance. Source found unreported in the 2020 emissions inventory.

60 NSPS (Part 60) OOOO: Standards of Performance for Crude Oil and Natural Gas Production,
Transmission and Distribution [40 CFR 60 Subpart OOOO]

In Compliance.

PREVIOUS ENFORCEMENT
ACTIONS: No enforcement actions within the past five years.

COMPLIANCE STATUS &
RECOMMENDATIONS: In regards to Ute Tribal 7-19-4-1:

Out of Compliance - This source was found to be non-compliant
at the time of inspection. Multiple emissions leaks were found at
the time of inspection. I recommend keeping inspection
frequency the same due to the low production of this source.

RECOMMENDATION FOR
NEXT INSPECTION: This source was found to be non-compliant at the time of
inspection. Multiple emissions leaks were found at the time of
inspection. I recommend keeping inspection frequency the same
due to the low production of this source.

ATTACHMENTS: