wrote:
The chemicals are the by-product of aircraft emissions, refueling
operations, and spills that occurred over 50 years, and they were found
up to 9 feet below ground.

If you dug down into any number of 50 year-old (or greater) backyards
you's probably be shocked at the concotion of contaminats to be found.
I would bet any money that the amounts of contaminats from various
airports are but a blip in the noise level compared to all the contaminats
from homes and businesses across the country.

But why inject logic in to the maelstrom.