650852_Thums_UIC
Summary
SCH Number
2025051407
Public Agency
California Department of Conservation
(DOC)
Document Title
650852_Thums_UIC
Document Type
NOE - Notice of Exemption
Received
Posted
5/30/2025
Document Description
THUMS Long Beach Co. proposes to rework an existing waterflood injection well in the Wilmington field on the Offshore Island Grissom. The rework consists of addressing an integrity issue in the wellbore casing by squeezing cement across areas of the well with casing integrity issues. This work would not expand the existing use of the well or modify associated UIC project 84939005. Temporary equipment such as pumps and return bins may be needed. Various mobile temporary equipment will be used including, but not limited to, Tier 4 workover rig, etc., and vehicles or vessels to transport personnel and materials to/from the site. No production facilities and no new ground surface disturbance will be associated with this project. Any waste materials will be properly disposed of in accordance with all applicable laws and regulations.
The proposed project consists of the California Department of Conservation, Geologic Energy Management Division (CalGEM) approving one permit for THUMS Long Beach Co. to rework the well listed below, in the Wilmington Oil Field, to address well integrity issues.
API # Well Name
0423720466 A-101 I
Contact Information
Name
Mikayla Vaba
Agency Name
Department of Conservation, Geologic Energy Management Division
Job Title
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
07
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
The “Class 1” (14 CCR § 15301) exemption is applicable per the CEQA Guidelines and CalGEM’s regulations (14 CCR § 1684.1) because the proposed work consists of repair, maintenance, or minor alteration of an existing previously permitted well involving no expansion of former use. The Class includes, but is not limited to: remedial, maintenance, conversion, and abandonment work on oil, gas, injection, and geothermal wells. The well would maintain its existing well type and the use of the well would remain the same as before.
Exempt Status
Categorical Exemption
Type, Section or Code
Class 2, Replacement or Reconstruction (14 CCR § 15302)
Reasons for Exemption
Class 2 applies because it consists of “replacement or 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[.]” Examples of Class 2 include, but are not limited to, “Replacement or reconstruction of existing utility systems and/or facilities involving negligible or no expansion of capacity.” The proposed project is the rework, or replacement, of the existing wellbore which is needed to repair the well for subsidence management and to prevent groundwater contamination. The rework will be on the same site and would have substantially the same purpose and capacity as the well did before the rework. Additionally, no additional construction will occur.
Exempt Status
Categorical Exemption
Type, Section or Code
Class 4, Minor Alterations to Land (14 CCR §§ 15304, 1684.2)
Reasons for Exemption
Class 4 exemption applies. The proposed project would be conducted entirely on an existing pad with enough space to contain all equipment. The project would not disturb any undisturbed areas. The proposed project is located within an industrial area. Therefore, the proposed project “consists of drilling operations that result in only minor alterations with negligible or no permanent effects to the existing condition of the land, water, air, and/or vegetation.” The rework would not expand the facility.
Exempt Status
Categorical Exemption
Type, Section or Code
Classes 7 and 8, Protection of Natural Resources and the Environment (14 CCR §§ 15307, 15308)
Reasons for Exemption
Class 7 and Class 8 exemptions apply. The exemptions are for actions taken by regulatory agencies as authorized by law to assure the maintenance, restoration, enhancement, or protection of a natural resource or the environment where the regulatory process involves procedures for the protection of the environment. As demonstrated in the record, the proposed project involves remedial/rework operations to address well integrity issues that requires swift action for protection of a natural resource and the environment.
Attachments
Notice of Exemption
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