Air dispersion
A Tier-1 AERMOD screening of the criteria-pollutant concentrations Urbana's disclosed emergency-generator plant would disperse across the surrounding grid. Switch pollutant and averaging period, toggle the NAAQS isopleth, and hover the field for the modeled µg/m³ at a receptor. Cells over the national ambient standard tint oxblood.
Modeled screening data — [inference]
The issued Air PTI withholds the emergency-generator make, model, and stack geometry as
confidential business information, so the stack parameters driving this run are an
assumption. Every concentration on this field is [inference] —
a labelled screening estimate, never [verified] and not a
measured value or a permit-violation finding. It shows where a modeled plume would fall, not
what a monitor recorded.
Peak modeled concentrations
No modeled air-dispersion field is on the record for this site yet. When the disclosed permit and a completed AERMOD run land, the screening surface appears here.