Agenda Item: 12(d)
Prepared By: Jeffrey E. Poteet, General Manager
Business: City Council Item
Department: Water and Sewer
Subject:
Title
Award of Contract to Cardinal Contractors, Inc. for the Construction of the Biologically Active Filter (BAF) Improvements Located at the Source Water Facility in the Amount of $9,822,100 - Jeffrey E. Poteet, General Manager, Water & Sewer Department
Body
BACKGROUND:
The City's primary raw water source is located nine miles north of Marco Island at the City's Source Water Facility. This raw surface water has a high organic compound level and is treated utilizing the lime softening process followed by microfiltration (MF) membranes at the North Water Treatment Plant (NWTP). The high organic content level in the water accelerates the life of the MF membranes, reducing their typical lifespan from 8 to 10 years to 3 to 6 years. The MF system has six trains (racks) of membranes, each train containing 72 membrane canisters, with an approximate cost of $300,000 per train.
To strengthen the City's water treatment capabilities and ensure compliance with future regulations, the implementation of BAF is a pivotal solution. The BAF effectively removes the high concentration of organic compounds and improves the raw water quality prior to the lime softening treatment process at the NWTP. This pretreatment filtration by BAF eliminates the organics responsible for membrane fouling, thereby restoring the full lifespan of the membranes and adverting the expense of premature replacements. Additionally, the BAF project promises a 90% reduction in color and eradication of taste and odor from the raw water. By strategically positioning BAF units upstream of the lime softening process at the NWTP, the City aims to address the challenges posed by the heightened levels of organic compounds in the raw water effectively.
On 1/10/2022, City Council authorized the City Manager to issue a purchase order to Jacobs Engineering Group Inc. for the...
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