R25AP00237_NEPA_Request_Form_(2.11.25).docx

UNITED STATES BUREAU OF RECLAMATION

CALIFORNIA-GREAT BASIN REGION 10

ENVIRONMENTAL REVIEW REQUEST FORM

Request Date: Click or tap to enter a date.

Proposed Action/Project Name: Well 22 Site Rehabilitation

Project Description: (A current project description is required before submitting a request for environmental compliance review. Provide a summary of the proposed project)

The City of West Sacramento is undertaking the Well 22 Site Rehabilitation Project to enhance water supply reliability, particularly for residents in the City’s low-income North Area, who face increasing water rights curtailments during drought conditions. The project will also provide a critical emergency backup water source for the entire City should the primary surface water system experience disruptions. The City of West Sacramento relies entirely on surface water supplies to serve its residents. In 2022, the State implemented water rights curtailments, State Water Project deliveries were reduced, and the U.S. Bureau of Reclamation cut Central Valley Project allocations. The Sacramento Valley faced unprecedented cutbacks to senior contractors, highlighting the City’s vulnerability to multi-year droughts and emergency situations. To strengthen its water supply portfolio, the City must develop a resilient backup water source. The Well 22 Site Rehabilitation Project will provide much-needed protection against prolonged droughts and natural disasters that could impact the City’s existing surface water supply. Well 22, located between Oak Street and Harbor Boulevard on a 2.5-acre site, has been dormant for several years, with its pump and drop pipe removed and the well capped. The site also includes a steel storage tank currently integrated into the City’s water distribution system. Among the City's dormant wells, Well 22 was chosen for its strategic location and existing infrastructure. Its proximity to the North Area and the active tank site makes it an optimal choice for enhancing the reliability and redundancy of the City's water supply system. Rehabilitation efforts will include installing a new power drop, well pump, drop pipe, valving, and piping to reintegrate the well into the system. The well casing’s condition is currently unknown, requiring swabbing, purging, and video inspection to determine its viability for sustained water production. Initial records indicate that Well 22 had a historical production capacity of 1,500 gallons per minute (gpm), with a target rehabilitation goal of 1,000 gpm. The well previously operated with chlorine injection but was taken offline before modern maximum contaminant level (MCL) regulations required secondary treatment. Pending production capacity tests and a Title 22 water quality analysis will determine additional requirements for bringing the well back into full operation.

Proposed Action Purpose (briefly state the purpose of the project):

By restoring the Well 22 site, the City aims to bolster drought resilience, reduce reliance on a single water source, and ensure long-term water security for its residents.

Target Date for NEPA/Environmental Compliance Completion: (When considering a NEPA completion date, keep in mind the applicant may be responsible for completion of post-NEPA tasks such as obtaining permits, grant approvals, etc. before construction can begin if applicable)

8/1/2025

Proposed Start Date and Duration of Proposed Action (Discuss window or timeframe for any construction activities if known/applicable):

Supplemental Information/Studies/Plans: (If available, please attach photographs, plans and specifications, other studies such as a feasibility study, resources management plan, cultural resources report, previously associated NEPA documents, CEQA documents, grant application, or other related documents/reports/information that could supplement environmental review)

Applicant understands that Reclamation must complete NEPA analysis prior to any ground disturbing or construction activities. (Confirm)

☒Yes ☐No

Will the proposed action involve ground disturbance?

☒Yes ☐No

If yes, complete the remaining portions of this form. If no, STOP HERE.

Pre-Construction and Construction Tasks Descriptions (Location, Duration, Equipment, and Methods): (Equipment type and quantities. Duration/frequency of construction. All temporary & permanent changes to the work area necessary to complete work. State whether the project involves ground disturbance. Area and depth of any subsurface disturbance (excavations, trenches). Establishment of staging areas and access route(s). Road improvements (e.g. widening or lifts) to support heavy equipment movement. Vegetation removal. Temporary fill or dewatering of work areas. Engineering and/or operational controls and BMPs volunteered (e.g. spill prevention plans, erosion and sediment controls)

Construction equipment and vehicles are anticipated to include a backhoe/loader, an excavator, a compactor, a drilling rig with up to 3 support vehicles, a crane, utility truck, water truck, welder, compressor, pump, pick-up truck, concrete pumper, cement mixer, asphalt truck, and generator. The pre-construction phase will begin with site preparation and staging, which is expected to take approximately 2–3 weeks. This includes establishing a designated staging area (approximately 0.5–1 acre) within the 2.5 acre parcel. Additionally, an exploratory drilling program would be conducted by a State of California Certified Hydrologist to characterize the geologic and water quality considerations. The site has known depth-specific water quality data, therefore, construction of a test hole would be conducted over the course of one week prior to construction.

Well drilling and design would be completed in accordance with California Well Standards Bulletin 74-81 and Bulletin 74-90 as well as Yolo County requirements. During construction, the existing Well 22 will undergo assessment and repairs, lasting approximately 2–4 weeks. A well camera system will be used to inspect the well casing, while air compressors or pumps will facilitate swabbing and purging. High-pressure jetting or chemical treatments may be applied to remove mineral buildup or biological fouling. If the existing well casing is found to be structurally compromised, a new casing or liner may be installed to restore integrity. If repair is not feasible, a new replacement borehole will be drilled adjacent to the existing bore hole.

New borehole drilling will involve mobilizing a drill rig and associated equipment to the site. Drilling activities will occur over a period of 6–8 weeks, depending on depth and geological conditions. Rotary or reverse circulation drilling methods will be used to install a new casing, which will typically extend to a depth of 500–700 feet. Temporary water containment structures and sedimentation basins may be required to manage drilling fluids and discharge water. Once the borehole is completed, a gravel pack and sanitary seal will be placed around the casing to prevent contamination. Well development will follow, using airlifting and test pumping over a 2–3-week period to remove drilling residuals and improve water production efficiency.

Project Location and Land Ownership: (Attach a clear map of the project location, GIS shapefiles and/or GPS coordinates, or Section-Township-Range. Map Should Delineate the Location of Pre-construction and Construction Tasks)

Well No. 22 is located at 964 Oak Street in the City of West Sacramento in Yolo County. The well site is to the east of Harbor Boulevard and north of the Union Pacific Railroad tracks on City owned property. The project latitude is 38°35'16.6"N and the longitude is 121°32'44.9"W. Well No. 22 is located at 964 Oak Street in the City of West Sacramento in Yolo County. The well site is to the east of Harbor Boulevard and north of the Union Pacific Railroad tracks on City owned property. The project latitude is 38°35'16.6"N and the longitude is 121°32'44.9"W. See below for a project location map and aerial imagery of the site.

Environmental Review Request Form U.S. Bureau of Reclamation California-Great Basin Region 10 1 image1.png image2.png