DAQ-2025-001037

1
DAQC-PBR080250001-25
Site ID 8025 (B1)
MEMORANDUM

TO: FILE – OVINTIV USA INC – Evelyn UT 4-4-3-1

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

FROM: Fred Goodrich, Environmental Scientist

DATE: February 18, 2025

SUBJECT: OIL AND GAS PERMIT-BY-RULE EVALUATION

INSPECTION DATE: November 14, 2024

SOURCE LOCATION: Lat: 40.25682 Long: -110.0105

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

SOURCE TYPE: Tank Battery
Duchesne
API: 4301351405, 4301353902

SOURCE CONTACTS: Ryan Zillner, Corporate Environmental Contact
Phone: [phone], Email: [e-mail]

OPERATING STATUS: Temporally Shut In.

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. Federal Subpart:

SOURCE EVALUATION: Site Type: PBR-Controlled
Controlled by flare, Site has Line Power.
The source registered: 70,000 Estimated Oil BBL.
DOGM current 12 month rolling production is:
Utah Statute R307-506 requires a source with throughput
greater than 8,000 BBLs to have controls.

, -
2
REGISTERED EQUIPMENT: Engine - Engine - Natural Gas 4-Stroke Rich Burn Make - CAT
Model - 3306TA Mfg Year - 2012 Horse Power - 203
Combustion - Natural Gas, Pneumatic, Tank

General Provisions Visible emissions are within the following opacity limits: VOC Control Devices and Gasoline engines 0%, Diesel engines 20%, Natural Gas Engines and Boilers, Treater burners & Tank burners 10%, Mobile source dust 10%. [ R307-201-3] Not Observed. Unable to enter well-site due to heavy equipment operations. All natural gas-driven pneumatic controllers are in compliance with 40CFR 60.5390 or 60.5390a as applicable. Tagging and record keeping requirements are not required. [R307-502-4] Not Observed. Unable to enter well-site due to heavy equipment operations. Associated Gas Flares Any flare has an operational auto-igniter and a continuously burning pilot flame. [R307-503-4] Not Observed. Flare inlet lines are equipped with a fire arrestor, pressure gauge, inlet pressure regulating valve and other components according to the engineering design, the manufacturers specifications or good practices for safety and emissions control. [R307-501-4(1)]] Not Observed. Unable to enter well-site due to heavy equipment operations. Tank Truck Loading Truck loading is done by bottom filling or submerged fill pipe [R307-504(1)] Not Observed. Unable to enter well-site due to heavy equipment operations. Storage Vessels Thief hatches are kept closed and latched. [R307-506-4(1)] Not Observed. Unable to enter well-site due to heavy equipment operations. Vessel Vent Components: (valves, unions, pressure relief devices, etc.) are leak-free, in good repair, and working as intended. (Tank covers are leak free and form a continuous seal.). [R307-501-4] Not Observed. Unable to enter well-site due to heavy equipment operations. The VOC control device(s) required by R307-506 or R307-507 has a control efficiency of 95% or greater, operates with no visible emissions and has a continuously burning pilot flame and an operational auto-igniter according to R307-503. [R307-508-3(1)] Not Observed. Unable to enter well-site due to heavy equipment operations.

3
Associated Gas Flaring Associated gas is routed to a process unit for combustion, a sales pipeline or an operating VOC control device, except in an emergency. An emergency release is unanticipated, temporary, infrequent, unavoidable, =24 hrs. and is not due to operator negligence. Low pressure gas from working loss, breathing loss and oil flashing is not "associated gas". [R307-511-4(1)] Not Observed. Unable to enter well-site due to heavy equipment operations. Associated Gas Flaring Not Observed. The following records are kept: The time and date of event Volume of emissions Any corrective action taken for 3 years. [R307-511-5(1)(a)(b)] Not Observed. Records not observed on this site inspection. The source has a source specific emissions monitoring plan. [R307-509-4(1)(a)] Not Observed. Records not observed on this site inspection. The following records are kept: The emissions monitoring plan, for life of the site LDAR inspections, repairs and resurveys, for 3 years [R307-509-5] Not Observed. Records not observed on this site inspection. Records for each of the following are kept for three years: Monthly storage vessel vent system inspections (openings, thief hatches, pressure relief devices, bypasses, etc.), if controlled. 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. [R307-506-5] Not Observed. Records not observed on this site inspection. Monthly AVO and USEPA method 22 inspections are conducted on VOC control devices and associated equipment, and corrective actions are taken within 5 days and completed within 15 days. [R307-508-3(3)] Not Observed. Records not observed on this site inspection. The following records are kept: VOC control device efficiency, for life of the equipment Manufacturer operating and maintenance instructions for VOC control devices, for life of the equipment AVO and USEPA method 22 inspections of the VOC control device(s), associated equipment and any repairs, for 3 years [R307-508-4] Not Observed. Records not observed on this site inspection.

4
Applicable Federal Regulations NSPS (Part 60) OOOOa: Standards of Performance for Crude Oil and Natural Gas Facilities for which Construction, Modification or Reconstruction Commenced After September 18, 2015 [40 CFR 60 Subpart OOOOa] Not Observed. Records not observed on this site inspection. Heavy equipment operations present. VOC Control Devices Not Observed. Leak Detection and Repair
PREVIOUS ENFORCEMENT
ACTIONS: None in the past 5 years.

COMPLIANCE STATUS &
RECOMMENDATIONS: In regards to the site, the overall status is: Not Observed.
Heavy equipment operations taking place on source. DAQ
recommends to revisit on a later date when well-site is safe to
enter.

RECOMMENDATION FOR
NEXT INSPECTION: DAQ recommends for the next inspector to observe for any new
source modifications.

RECOMMENDATIONS FOR NSR: None.

ATTACHMENTS: None.