The City of Santa Ana Walnut Pump Station PFAS Treatment Project
Summary
SCH Number
2026090734
Public Agency
Orange County Water District
Document Title
The City of Santa Ana Walnut Pump Station PFAS Treatment Project
Document Type
NOE - Notice of Exemption
Received
Posted
9/17/2026
Document Description
The City of Santa Ana Walnut Pump Station PFAS Treatment Project consists of removing PFAS contaminants from wells 16, 29, 33 and 41 at a new centralized PFAS treatment plant located in the Walnut Pump Station. The key project components include ion exchange vessels, booster pumps, cartridge filters, an expanded sodium hypochlorite disinfection system, a new water conveyance pipeline, flow meters, valves, drains, electrical and instrumentation control equipment. Eight ion exchange vessel systems in a lead-lag configuration (for a total of sixteen vessels) will be installed as part of the new centralized PFAS treatment plant. This Project also includes a new water conveyance pipeline to connect wells 16 and 41 to a new centralized PFAS treatment plant utilizing ion exchange in the Walnut Pump Station.
Contact Information
Name
Shawn Nevill
Agency Name
Orange County Water District
Job Title
Principal Planner
Contact Types
Lead/Public Agency / Parties Undertaking Project
Phone
Email
Location
Coordinates
Cities
Santa Ana
Counties
Orange
Regions
Citywide, Southern California
Cross Streets
Flower Street/Civic Center Drive
Zip
92703
Total Acres
1
Parcel #
405-191-01
State Highways
N/A
Railways
N/A
Airports
N/A
Schools
Wilson Elementary
Waterways
N/A
Township
28N
Range
2W
Section
12
Base
SBMM
Other Location Info
The Project would occur at the existing City of Santa Ana well SA-16, SA-29, SA-33 and SA-41 sites as well as a 0.4-mile pipeline within the existing alignment of Flower Street between the Walnut Pump Station and Well SA-41. The physical address and coordinates of the components are provided below.
• Well 16: 1104 W. Civic Center Drive, Santa Ana, CA 92703 APN# 405-191-01
• Well 29 is located at 722 W. First Street, Santa Ana, CA 92701 APN# 398-214-01
• Well 33 is located at 900 W. Walnut Street, Santa Ana, CA 92703 APN#008-144-17
• Well 41 is located at 1104 W. Civic Center Drive, Santa Ana, CA 92703 APN#405-191-01
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 3, Section 15303
Reasons for Exemption
The project is consistent with the Categorical Exemption for the New Construction or Conversion of Small Structures because the project consists of the installation of a small treatment plant and associated pipelines at existing nearby water well sites that are currently developed and operated as water production infrastructure.
County Clerk
Orange
Attachments
Notice of Exemption
Disclaimer: The Governor’s Office of Land Use and Climate Innovation (LCI) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. For more information, please visit LCI’s Accessibility Site.