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South ramp air‑quality modeling shows net emissions declines; commission narrows sound‑barrier choice to perforated PVC with mineral wool
Summary
Commissioners reviewed a modeling report showing modeled emission reductions from the South Apron expansion under worst‑case activity assumptions, and consultants recommended a perforated PVC absorptive sound wall with mineral‑wool backing as the preferred noise barrier.
Commissioners reviewed an air‑quality technical report and a consultant sound‑barrier study for the south apron expansion at the Feb. 11 meeting. Staff described the air‑quality study as a baseline, worst‑case modeling run that compared pre‑ and post‑expansion conditions using locally recorded meteorology and aircraft activity patterns.
Consultants reported that the model showed reductions in total emissions across modeled criteria pollutants in the scenarios run. The greatest modeled reductions came from decreased taxi time and more efficient aircraft routing to the new apron configurations; receptors near some portions of the extended ramp would see modest increases in worst‑case…
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