In a surprise to nobody who uses it the EPA finds the air in Union Station and it's platforms is still really really bad. Somebody needs to tell Metra to either add emissions controls/AESS to all F40 rebuilds or buy new locomotives and Amtrak for it's part needs to start standing on necks to get all the ventilation working (and augment it if required).
Quote:
The 24-hour legal limit for particulate matter smaller than 2.5 microns, the most commonly used measure of soot, is 35 micrograms per cubic meter of air.
At Union Station, average levels of soot jumped from 43 micrograms per cubic meter of air outside the station to 129 on the north platform, according to a summary of the EPA's results. Soot levels were significantly higher on the south platform — 203 micrograms on average.
Commuters were exposed to the dirtiest air at 5 p.m., when rush hour trains packed into the station led to average levels of 299 micrograms per cubic meter.
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http://www.chicagotribune.com/news/w...105-story.html