City Council
259 N. Wilma Avenue
Ripon, CA 95366
MEMO
To: Honorable City Council
From: Kevin Werner, City Administrator
Date: 06/11/2024
Subject: First Amendment to Stantec Consulting Services, Inc. Services Agreement RECOMMENDED ACTION:
Approve and authorize the Mayor to sign Amendment No. 1 to the Professional Services Agreement with Stantec Consulting Services, Inc. for additional funds needed 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 $105,776 (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 justifies the expense of costly well head treatment.
At the March 12, 2024 City Council meeting, Council approved the Professional Services Agreement with Stantec Consulting Services, Inc. in the not to exceed amount of $193,145 to evaluate the condition of Well 9 and the feasibility of installing a new well at the existing site, suggesting 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’s proposals included the drilling of a test well to a depth of 600 feet and perform water quality testing at the different aquifers to provide the data needed to determine the feasibility of developing a new well at the Well 9 site.
DISCUSSION/ANALYSIS:
The following is a summary of the bids originally received by Stantec for a drilling contractor:
Altamont Water Well and Pump: $150,645
Nor-Cal Pump and Well Drilling: $256,421
Roadrunner Drilling: $341,990
Maggiora Bros. Drilling Inc.: $377,025
The drilling contractor Stantec originally selected based on the bid prices for the Well 9 Evaluation and Condition Assessment (Altamont Water Well and Pump) is no longer available to perform the requested work.
To proceed with the project as originally scoped, staff is requesting to move forward with the second lowest bidder, Nor-Cal Pump and Well Drilling. Stantec requested an amendment of $105,776 as summarized below, to cover the increase in cost.
Task
Original
Contract
Price
Amended
Contract
Price Dif
Field and Technical Services $16,500 $16,500 $0.00
Well Driller $150,645 $256,421 $105,776
Condition Assessment & Test Boring Technical Memo $15,000 $15,000 $0.00 Preparation of Well Design and Technical Specifications $11,000 $11,000 $0.00 Totals $193,945 $298,921 $105,776
Staff is recommending the City Council approve Amendment No. 1 to the Professional Services Agreement with Stantec Consulting Services, Inc. for additional funds to evaluate the feasibility of installing a new well at the existing site in the not to exceed amount of $105,776.
FINANCIAL IMPACT:
The amended total contract amount for the project is $298,921. This expense will be paid for through the Water Enterprise Capital Fund (current balance: $6.7 million).
Attachments:
1. Amendment 1_Stantec Consulting Services Inc
2. Exhibit A_Stantec Proposal