617838_84942001_Thums_UIC
Summary
SCH Number
2025110133
Public Agency
California Department of Conservation
(DOC)
Document Title
617838_84942001_Thums_UIC
Document Type
NOE - Notice of Exemption
Received
Posted
11/5/2025
Document Description
The proposed project would modify Underground Injection Control (UIC) project No. 84942001 by converting twelve (12) active and idle oil and gas production wells to injection. The project would take place on Island White and Island Freeman, which are offshore artificial islands dedicated to oil and gas production. The project does not include the construction or expansion of existing facilities. The Los Angeles Regional Water Quality Control Board reviewed the project for groundwater impacts and issued a No Objection Memo on February 19, 2025.
The proposed project consists of THUMS Long Beach Co. (THUMS) seeking the issuance of one project approval letter (PAL) by the California Department of Conservation, Geologic Energy Management Division (CalGEM) to modify UIC project No. 84942001, located within the Wilmington Oil Field. The wells listed below would be associated with the UIC project.
API # Well Name
0423720414 B-110
0423720775 B-122
0423720691 B-202
0423727004 B-554
0423726873 B-570
0423722837 B-767
0423722838 B-775
0423720810 D-425
0423722262 D-432
0423722533 D-598
0423720806 D-623
0423723318 D-738
Contact Information
Name
Mikayla Vaba
Agency Name
California Department of Conservation (DOC)
Job Title
Associate Environmental Planner
Contact Types
Lead/Public Agency
Phone
Email
Name
Andrew Cochrane
Agency Name
THUMS Long Beach Co.
Job Title
Agent
Contact Types
Project Applicant
Phone
Email
Location
Coordinates
Cities
Long Beach
Counties
Los Angeles
Regions
Southern California
Township
05S
Range
12W
Section
08
Base
SB
Other Location Info
Wilmington Oil Field
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 1, Existing Facilities (14 CCR §§ 15301, 1684.1)
Reasons for Exemption
Class 1 applies because the proposed project consists of “minor alterations” to 12 existing oil and gas production wells involving “negligible or no expansion of existing or former use” (14 CCR § 15301). The project would make negligible changes to the UIC project by converting 12 existing oil and gas production wells to waterflood injection. This work is part of a non-expansion infill package and would be subject to the terms of the existing project approval letter (PAL). The project would take place on artificial offshore islands and would not involve the construction of new facilities or the expansion of existing facilities. The Los Angeles Regional Water Quality Control Board reviewed the project for groundwater impacts and issued a No Objection Memo on February 19, 2025. Therefore, there would be a negligible change in existing use.
Exempt Status
Categorical Exemption
Type, Section or Code
Class 2, Replacement or Reconstruction (14 CCR § 15302)
Reasons for Exemption
Class 2 applies because the proposed project consists of the “reconstruction of existing structures and facilities where the new structure will be located on the same site as the structure replaced and will have substantially the same purpose and capacity as the structure replaced” (14 CCR § 15302). The project would reconstruct the wellbores of 12 existing oil and gas production wells to convert them to waterflood injection. The work would take place on existing wells located on existing offshore islands.
Exempt Status
Categorical Exemption
Type, Section or Code
Class 4, Minor Alterations to Land (14 CCR §§ 15304, 1684.2)
Reasons for Exemption
Class 4 applies because the proposed project would result in “minor alterations with negligible or no permanent effects to the existing condition of the land, water, air, and/or vegetation” (14 CCR § 1684.2). The project would make minor alterations to 12 existing oil and gas production wells to convert them to waterflood injection. The project would take place on offshore artificial islands dedicated to oil and gas production. The project does not include the construction or expansion of existing facilities. Therefore, there would be negligible impacts to the surrounding environment.
Attachments
Notice of Exemption
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