Title
Approving the procurement of water treatment membrane modules in the amount of $672,744, and authorizing the City Manager to execute the same.
Summary
This item is proposing to replace the water treatment membranes for train 5 which has significant wear and calcium deposition on the membrane module has the oldest modules of the trains at 8 years, and currently is out of service due the integrity testing being outside of the spec for the membranes to produce water. These membranes have seen significant use over the years including being repaired extensively after 2019 when zebra mussels were identified to have caused some damage to the membranes.
SUEZ Water Technologies & Solution was contacted and come on site to evaluate the repairability of the membranes given the calcium deposition on the membrane modules. This evaluation showed that any repairs performed could not be guaranteed to produce a membrane train that would produce acceptable results and stay in compliance with TCEQ regulations regarding membrane integrity testing.
While staff would prefer to repair the membrane train given the current water treatment plant expansion project that has begun, we would lose significant treatment capacity of the membranes if we were to make repairs and it may take longer than 6 months to complete repairs.
If replaced, this membrane train would allow the treatment plant to produce enough water to satisfy peak summer demand for the City while also allowing the City to meet summer demands until the surface water treatment plant expansion is completed in 2026.
SUEZ Water Technologies & Solutions is a sole source provider of the membranes that will be replaced. Membranes pricing is in line with the City’s contract with SUEZ guaranteeing prices for twenty (20) years subject to adjustment for inflation (consumer price index (CPI) All Urban Consumers according to US Bureau of Labor Statistics) or a maximum equivalent price per gallon of treatment capacity ...
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