FBI Investigating Mysterious Package At Mosaic

TAMPA, Fla.- Mosaic Fertilizer has been in the news a lot lately for the highly covered sinkhole that was leaking contaminated water into the state aquifer. Now they are in headlines for a suspicious package that was discovered at their Hillsborough County plant.

The package was discovered Friday night at their headquarters. Firefighters responded to the scene and performed initial tests that came back negative for any dangerous materials. From there the FBI quickly took over. They delivered the package to USF for further testing.

The package showed up in the midst of time when Mosaic has been under fire. The fertilizer company is still facing lawsuits regarding the large sinkhole that opened up last month. The sinkhole is believed to have leaked over 200 million gallons of radioactive water. A recent test showed some contamination found in a recovery well, but none in the monitoring wells further form the sinkhole.

The FBI released the following statement on Saturday:

“The FBI Tampa Division responded to a call about a suspicious envelope delivered on Friday to the Mosaic Corporation in Lithia, FL. The envelope contained a white, powdery substance that is currently being analyzed at the laboratory. Results are expected to take several days. If anyone has information that could be helpful to this investigation, please call the Tampa FBI at 813-253-1000.”


Background on Mosaic

POLK COUNTY, Fla.- A Mosaic pond has leaked about 215 million gallons of “slightly radioactive” water into the Florida aquifer since August 27 when a sinkhole opened up under a retention pond, says Mosaic.

The drainage is happening at Mosaic’s New Wales plant off of Highway 640 in Polk County. The plant sits on top of a huge gypsum stack and stores wastewater in ponds.

On August 27 a representative told Fox 13 News that they noticed the water level in one of the ponds dropping. About a week later a sinkhole was confirmed to have opened up under the gypsum stack. The sinkhole is 40 feet across and it’s depth is unknown.

Photo: WFLA
Photo: WFLA

Gypsum comes out of the plant after Mosaic produces phosphate fertilizers and animal feed ingredients. Gypsum is a soft white or gray mineral consisting of hydrated calcium sulfate.

David Jellerson, Mosaic’s director of environment and phosphate projects, told WFLA, “when it was first noticed (the drop in water level), we installed pumping systems to move water out of that compartment on the gypsum stack, to recover the water.”

The water, which was leaking into the Florida aquifer, is contaminated with phosphoric acid and is slightly radioactive. It is water you wouldn’t want to drink. Sodium and sulfate are the contaminants of concern, along with the phosphoric acid.

“We also have quite a number of monitoring wells and have increased the monitoring schedule to confirm nothing has left the perimeter of the site,” said Jellerson.

Mosaic said they immediately notified the state Department of Environmental Protection and the EPA. They also said the groundwater has been routinely tested since the sinkhole was confirmed.

As of now Mosaic doesn’t believe the contaminated water has made its way to any private wells since it hasn’t shown up in the monitoring wells around the plant.

The plant assistant general manager, Chris Hagemo, said Mosaic will continue to monitor the stack to insure there is no safety concerns. Mosaic will also continue to remediate groundwater beneath the sinkhole until DEP gives the all-clear.

Allison Leslie is a University of South Florida graduate with a bachelors degree in Mass Communications. She joined Genesis in 2016. With a passion for sports, Allison has interned with 620 WDAE, Pewter Report, Trifecta Team: St. Petersburg Bowl, Bullscast, and many other publications. Being a native to the Bay Area, she has followed and supported Tampa Bay teams her whole life.