There is no dispute that the primary (health-related)
ambient air quality standards for particulate are violatedat Granite City.
Nor is it known whether any violations exist on the
Missouri side.
Louis and Cahokia are in the same meteorological
airshed as Roxana and Shell.
The 8-volume U.S. Public
Health Service “Interstate Air Pollution Study” by J.D.Williams, G. Ozolins, J.W. Sadler, and J.R. Farmer, wasissued in May, 1967 and might possibly provide answers tothe “physical airshed” question raised earlier.
Allowed
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