Agenda Item: 7(b)
Prepared By: Jeffrey E. Poteet, General Manager, Water & Sewer
Business: Consent Agenda Item
Department: Water & Sewer
Subject:
Title
Authorize the City Manager to Issue a Purchase Order to Apex Companies for the Rehabilitation and Liner Installation of Groundwater Well RO-16 in the amount of $145,000.00 - Jeffrey E. Poteet, General Manager, Water & Sewer Department.
Body
BACKGROUND:
The City of Marco Island's South Water Treatment Plant (SWTP) utilizes a reverse osmosis (RO) membrane treatment process to treat brackish groundwater for the City's groundwater supply system. Groundwater Well RO-16, located on South Sunset Street, is a critical component of the City's water production infrastructure. In late 2025, staff observed a significant increase in the salinity levels within the well, indicating a potential integrity issue within the well casing. As a result, a purchase order was issued to Apex Companies, LLC, through its subsidiary Water Science Associates, LLC, to conduct geophysical logging and video survey investigations of Well RO-16. The investigation identified saline intrusion entering the well through a separated casing joint located approximately 156 feet below the top of casing.
To address the issue and restore the well's integrity and operational reliability, Apex submitted a proposal dated May 7, 2026, to provide hydrogeological and well remediation services, including the installation of an internal stainless-steel liner within Well RO-16. The proposed scope of work includes removal of the existing wellhead and pumping equipment, installation of approximately 160 feet of 8-inch stainless steel liner casing, cementing the liner in place, conducting post-installation video surveys, reinstalling pumping equipment, and testing the rehabilitated well to ensure proper operation.
In addition to the field work, Apex will prepare a final technical report documenting the remediation activities, caliper log and video survey resu...
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