Agenda Item: 8(e)
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, LLC. for the Rehabilitation of Groundwater Well RO-04 in the amount of $132,100.00 - 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-04, located at the South Water Treatment Plant, 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, Inc, to conduct geophysical logging and video survey investigations of Well RO-04. The investigation was carried out in April 2026. The technical report identified saline intrusion entering the well through an open hole located approximately 526 feet below the top of casing. To address the issue and restore the well's integrity and operational reliability, Apex submitted a proposal dated August 4, 2026, to provide hydrogeological and well development services. The proposed work includes conducting 16-hour of suction airlifting, followed by 24-hour surge direct airlifting, to remove the accumulated sand and restore the well's production capacity. The detailed scope of work is included in the attached Apex's proposal.
The total proposed cost for the project is $132,100, consisting of $96,100 for well development and testing services and $36,000 for field oversight by a professional hydrogeologist and preparation of the development plan. The work will be performed under the City's exi...
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