Freeway Well Feasibility Study


For almost 30 years, the City used the freeway well to provide approximately one million gallons of water per day to its customers. However, in the 1980’s City staff discovered during routine water quality testing that groundwater below the site had become contaminated with volatile organic compounds (VOCS) from chemicals and solvents used at nearby properties in the area. The Freeway Well has not been used since that time.

Project Purpose:

For many years, Santa Rosa Water has wanted to study groundwater resources below the Freeway Well and determine if it’s feasible to rehabilitate the well or replace it, but the City has not had the resources to do so. The State Water Resources Control Board expressed interest in aiding the City and has awarded a grant to help fund the Freeway Well.

Feasibility Study:

The Feasibility Study for this project has been completed and a draft report is being prepared. The final report will be posted to this webpage after it has been approved by the State Water Resources Control Board (anticipated by Oct 2021).

Disclosure Statement: Funding for this project has been provided in full or part through an agreement with the State Water Resources Control Board using funds from Proposition 1. The contents of this document do not necessarily reflect the views and policies of the foregoing, nor does mention of trade names or commercial products constitute endorsement or recommendation for use . 

Prop 1

Stakeholder Advisory Group 

Investigation Records review of existing environmental records and landuse records with the Project area and site visits to gather data and selection of observation wells. Completed
Survey City survey team will visit participating well sites and survey to establish reference point elevations. Completed
Installation of Transducers Installation of data-logger equipped pressure transducers to record groundwater levels. Completed
Pilot Boring and Monitoring Well Installation Contractor to drill a pilot hole at the Freeway Well site to collect geophysical data and then construct three monitoring wells within the pilot boring at different depths. Completed
Aquifer Testing A step pump test and well velocity testing will be conducted in the Freeway Well and a constant rate pump test of 72-hour duration will be performed in the Freeway Well, with water level measurements collected from observation wells and the newly-constructed monitoring wells. Completed
Groundwater Sampling and Analysis A water quality sample will be collected from the Freeway Well and will be analyzed for the Title 22 parameters.
Remedial Investigation Report Report with summary of data, data analysis, field work, construction, and findings from remedial investigation activities (record review, water quality sampling, pilot boring, and aquifer testing). Completed
Prepare Feasibility Study Preparation and submittal of a final Technical Memorandum of the findings and conclusion regarding the Project feasibility. Ocober 2021