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Committee flags likely data error after spike in draft 2024 greenhouse‑gas inventory

Los Altos Hills Outreach Committee · May 28, 2026
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Summary

Committee members identified an apparent error in the draft 2024 greenhouse‑gas inventory — staff and consultant figures produced an implausible '150,000 miles per vehicle' figure after SVCE emissions factors spiked, and the committee asked staff to work with CSG to correct the calculations.

The Los Altos Hills outreach committee raised concerns about the draft 2024 greenhouse‑gas inventory after staff reported a substantial, likely erroneous increase tied to utility emissions factors and data entry.

Committee member (speaker 2) said that SVCE “had really bad emissions factors for 2024,” which caused the community‑wide inventory to jump. Speaker 2 and others pointed to a specific calculation anomaly in the government fleet numbers run by consultant CSG — one figure that was reported as roughly "150,000 miles per vehicle" was flagged as implausible and likely the result of a data‑entry or unit conversion error (speaker 2 suggested a month/year field was mis-entered).

The committee asked staff to convene with CSG to review the inputs and calculations and to provide corrections. Speaker 2 described the next step: gather committee comments, send them to CSG, and have CSG update the draft inventory once the bug and unusual emissions factors are reconciled.

Members also noted the draft inventory included government fleet emissions and that some assumptions about vehicle counts and mileage need verification. Speaker 4 questioned the per‑vehicle mileage number and asked staff to check whether the total miles had been misallocated across vehicles.

No formal decision was taken; the committee directed staff and named volunteers (speaker 1 and speaker 2 were assigned follow-up) to meet and coordinate corrections with CSG before the inventory is finalized.