No violations found in McCook quarry blast - Chicago News and Weather | FOX 32 News

No violations found in McCook quarry blast

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CHICAGO (FOX 32 News) -

State investigators say they found no wrongdoing in the quarry blast that sent shockwaves throughout the west suburbs this week.

The blast at Hanson Materials in McCook shook buildings and broke glass Monday, registering a 3.2 on seismographs. At first, residents thought it was an earthquake.

After two days of inspection, the Illinois Department of Natural Resources says the quarry operated within limits and they found no violations in the quarry's blasting measurements or reports.

"The Office of Mines and Minerals takes the proper handling and use of explosives very seriously. In this instance, our inspection found no violations of state law," said OMM Blasting and Explosives Unit chief Mike Falter.

According to a release, Illinois state regulations limit the resultant vibrations from surface blasting to one inch per second at the nearest protected structure. Measurements taken at the quarry on Monday showed the maximum blast vibrations at .35 inches per second at the nearest protected structure.

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