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The Invisible Roof Stacks

The Invisible Roof Stacks
The EPA had photos showing a new stack on the roof of a plant. Upon examination, they found nothing. What happened to the stack?
Mysteries of Science


The plant manager hated the EPA and the feelings were mutual. The manager believed that he could run the factory as he saw fit without interference from the EPA.

An incident occurred when the plant manager installed a new paint drying system. Someone tipped off the government that no permit had been filed. The plant manager promised not to add any new equipment without a permit.

He asked the EPA inspector how he would know if he had added new equipment. The inspector consented that while they need to give notice before a visit, they could watch from outside for any new stacks on the roof.

A month later the EPA was back asking for access to the roof.

The plant manager assured the president that nothing had changed and two hours later the inspectors were on their way. A month later another crew from the EPA was back with dated aerial photos showing a new stack on the roof. 

But again upon examining the roof the inspectors found nothing.

Why was nothing showing up in their physical examination when they had photos that showed a new stack on the factory's roof? 

The Rest Of The Story

Once the manager was aware of their aerial surveillance methods; he started putting phantoms on the roof. First a coffee can, then a black 5-gallon bucket. They looked like stacks from the air. Once the plane made its fly-over, the manager would bring the props back inside.



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