City Council
259 N. Wilma Avenue
Ripon, CA 95366
MEMO
To: Honorable City Council
From: Kevin Werner, City Administrator
Date: 03/12/2024
Subject: Stantec Consulting Services, Inc.
RECOMMENDED ACTION:
Approve and authorize the Mayor to sign the Professional Services Agreement with Stantec Consulting Services to evaluate the condition of Well 9 and the feasibility of installing a new well at the existing site in the not to exceed amount of $193,145 (funding source: Water Enterprise Capital Fund).
BACKGROUND:
Well 9 is a potable water well located on Reynolds Avenue, adjacent to the bike bridge parking lot. The well was constructed in 1989 to a depth of 200 feet and at that time produced 1,500 gallons per minute (gpm) of water for the City’s potable water system. In 2007, the City constructed a coagulation/filtration system to treat the groundwater to levels that are within state and federal safe drinking water standards.
The well is currently not in use because the capacity has dropped from 1,500 gpm to less than 500 gpm, which no longer justified the expense of costly well head treatment.
DISCUSSION/ANALYSIS:
Staff has requested a scope and fee from Stantec Consulting Services, Inc (Stantec) to evaluate the following options to move forward:
Identify improvements to Well 9 to increase pumping capacity to a level where it can become a productive potable water well. If that is not possible, consider connecting Well 9 to the non-potable water system.
Evaluate drilling a new well on the existing site at a deeper depth to produce sufficient water that does not require a well head treatment system. If a well head treatment system is required, evaluate if sufficient capacity is available to justify the cost of well head treatment.
Stantec has submitted a proposal to complete the following items of work as part of evaluating the previously described options:
Perform a condition assessment for Well 9 that will include a pumping test to assess the aquifer properties and efficiency along with a downhole video log. Drill a test well to a depth of 600 feet and perform water quality testing at the different aquifers.
If results of the testing support moving forward with a new well at the site, Stantec will prepare the well design and technical specifications.
The total fee for the scope of services summarized above is $193,145.
FISCAL IMPACT:
The attached Professional Services Agreement with Stantec Consulting Services includes a detailed time and material proposal outlining the tasks as Exhibit A. The cost to complete the work within the proposal is a not to exceed amount of $193,145, which will be funded by the Water Enterprise Capital Fund. The current balance of this Fund is $6.8 million.
Attachments:
1. Exhibit A_Well 9 Condition Assessment Scope and Fee Rev-02
2. Services Agreement_Stantec Consulting Services, Inc.