DAQ-2024-007110

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DAQC-PBR032530001-23
Site ID 3253 (B1)
MEMORANDUM

TO: FILE – OVINTIV USA, INC. – Ute Tribal 15-14-4-3

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

FROM: Stephen Foulger, Environmental Scientist

DATE: November 1, 2023

SUBJECT: OIL AND GAS PERMIT-BY-RULE EVALUATION

INSPECTION DATE: October 19, 2023

SOURCE LOCATION: Ute Tribal 15-14-4-3
Lat: 40.1289 Long: -110.18679

Business Office:
Ovintiv USA Inc.
370 17th Street, Suite 1700
Denver, CO 80202

SOURCE TYPE: Tank Battery
Duchesne County
API: 4301350289

SOURCE CONTACTS: Brad Rowser, Local Contact
Phone: [phone], Email: [e-mail]
Brandon Lithgoe, Local Contact
Phone: [phone], Email: [e-mail]
Jeanette Liang, Corporate Environmental 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.

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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 IIII, 40 CFR 60 Subpart
JJJJ, 40 CFR 60 Subpart OOOO.

SOURCE EVALUATION: Site Type: PBR-Uncontrolled
No Flare Controls
Site powered by Engine
The source registered: 627 Estimated Oil BBL.

DOGM current 12 month rolling production is 0
Utah Statute R307-506 requires a source with throughput
greater than 8,000 BBLs to have controls.

REGISTERED EQUIPMENT: Engine - Natural Gas 2-Stroke Lean Burn Make - Arrow
(Lufkin) Model - L-795 Mfg. Year - 2010 Horse Power - 65
Combustion - Natural Gas, Pneumatic, Tank

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15 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.

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.

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. Combustor was removed after source dropped below production thresholds.

24 Records for each of the following are kept for three years:
Storage vessel vent system inspections (openings, thief hatches, pressure relief devices,
bypasses, etc.), if required
Monthly crude oil throughput
Emission calculations, actuals and sampling data when used to justify an exemption to storage
vessel rules
Emergency storage vessel usage (dates used, emptied, and volumes), if not controlled
per R307-506-4(2)[R307-506-5]

In Compliance.

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38 Natural Gas Engines

39 Engines subject to R307-510 (does not have an AO, began operations, installed or modified after
January 1, 2016) meet the following limits:

Maximum Engine hp Emission Standards in (g/hp-hr)
NOx CO VOC HC+NOx
>25 hp and < 100 hp - 4.85 - 2.83
>100 hp 1.0 2.0 0.7 -

[R307-510-4(1)]

In Compliance.

40 Affected engines are certified or have an initial performance test per 40 CFR 60.4244. [R307-510-4(2)]

In Compliance. EPA certified engine is used onsite.

41 Affected engine exhaust vents are vertical and unrestricted.
Stacks are 8' or greater if the site horsepower rating is 151 to 305
Stacks are 10' or greater if the site horse power rating is 306 or greater. [R307-510-4(3)]

In Compliance.

42 Engine certifications or initial performance tests required are kept for the life of the engine at the
source. [R307-510-5]

In Compliance.

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)]

In Compliance. Emissions inventory found properly reported to UDAQ.

58 NSPS (Part 60) IIII: Standards of Performance for Stationary Compression Ignition Internal
Combustion Engines [40 CFR 60 Subpart IIII]

In Compliance.

59 NSPS (Part 60) JJJJ: Standards of Performance for Stationary Spark Ignition Internal Combustion
Engines [40 CFR 60 Subpart JJJJ]

In Compliance.

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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 15-14-4-3:

In Compliance - Found compliant at the time of inspection. This
source is currently under frack protect and is shut-in. There are
plans to plug and abandon this well after the frack protection is
lifted. Recommend to decrease inspection frequency.

RECOMMENDATION FOR
NEXT INSPECTION: Found compliant at the time of inspection. This source is
currently under frack protect and is shut-in. There are plans to
plug and abandon this well after the frack protection is lifted.
Recommend to decrease inspection frequency.

ATTACHMENTS: