The device was found 11:20 a.m. by a worker at the Solid Waste Disposal Complex on Bethpage-Sweet Hollow Road, according to Phyllis Barry, a spokeswoman for Oyster Bay Town. She said the complex had resumed operations by early afternoon.
Barry referred questions about the device to police. Police said the arson-bomb squad removed the device, and determined it was a live grenade. They said it would be destroyed "at a later date."
Police added that all grenades found are treated as live grenades.
In February, Suffolk police said a "live but corroded" grenade was found in the basement of a Sayville diner by a contractor who was fixing a gas leak. They said the grenade was old but were unsure how long it had been there.
Last June, a live grenade was dug up in an Amagansett yard by a worker who initially thought it was a rock. The Suffolk bomb squad said the live grenade appeared to be from the World War II era, and after determining it was too fragile to move, they detonated it on the spot.
With Candice Ruud