County staff proposes liner standards, testing and decommissioning rules for data centers

Aug 18, 2026

The draft amendments would raise retention-pond liner minimums to 60 mm, require pre-liner subgrade testing and test ports, and add site-stabilization and financial-assurance requirements to protect taxpayers if a data center is decommissioned or ownership changes.

The full story

Staff outlined a set of environmental amendments aimed at reducing the risk of leaks and ensuring local capacity to manage water and site cleanup. The proposal raises the geomembrane liner thickness for retention ponds, mandates subgrade testing prior to liner placement, and requires test ports to allow periodic monitoring.

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