The Army Corps of Engineers began trying to find out who provided the fill dirt for a housing development just northeast of Orlando International Airport, where a World War II-era practice bomb was found Tuesday.
The bomb was only about two feet below the surface, definitely in fill dirt, according to the Corps, so their question was, "Where did the dirt come from?"
The question gave residents who had been told they were probably in the clear new worries.
If the fill dirt came from the nearby Pinecastle Jeep Practice Range, the concerns go beyond explosives.
Lou Liggett of Warwick cited a soil test done on the bomb range several years ago.
"They found high levels of nitroglycerin, high levels of mercury — there's said to be mercury in the lake," Liggett said. "We need to know how that correlates to sprinkler water. We need to know how that correlates to our drinking water, and those things haven't been answered."
Lennar, the home builder, says they came in after the land was already prepared by a site developer who had already built up the land with fill dirt and leveled it.