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Staff flags mapping discrepancy at Vacaville/GE Vernova site; board asks for planning review

Alameda County Board of Supervisors Transportation/Planning Committee · December 1, 2025

Summary

Planning staff identified a discrepancy between zoning (industrial) and ECAP/Measure D general-plan designation (Resource Management) at a multi-parcel Vacaville site owned by GE Vernova; the committee directed staff to pursue a planning-process route (planning commission and advisory review) for potential technical map correction.

Planning staff showed the committee maps for a Vacaville-area site (owner of record indicated as GE Vernova) and identified a triangular parcel where zoning (M2 heavy industrial) and the ECAP general-plan designation (largely Resource Management) do not align. Staff said the triangular parcel contains existing industrial development and could reasonably be corrected in ECAP to match historic zoning as a technical amendment in limited scope.

Board members and public commenters asked for clarity about what portion of the site would be remapped and for the staff to route any proposed change through the Planning Commission and applicable advisory committees. Staff said the process to pursue a general-plan amendment or a technical correction would involve Planning Commission recommendation and public outreach, and that any substantive or countywide map changes tied to Measure D still raise the possibility of needing a ballot amendment or further legal review.

Why it matters: Mapping discrepancies can create uncertainty for existing uses, proposed projects and public perception (some commenters raised concerns about radioactivity and historical landfill deliveries, which staff did not substantiate but said mapping precision is important). Staff will follow the typical general-plan amendment route for targeted corrections.

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