Historically, the phosphate industry in Riverview Florida “stacks” their waste in huge mounds called phosphogypsum stacks, “gypstacks”. The gypstack mound holds radioactive materials such as Uranium and other heavy metals along with large volumes of sulfuric acid, phosphoric acid, and a phosphate slurry mix. Phosphogypsum is hazardous waste produced in fertilizer production from strip mined phosphate in Florida.
Sinkholes are known to occur inside phosphogypsum stacks due to the added weight created by the “stack”. The stacks are also radioactive creating environmental hazards in and around all phosphate facilities. The stacks hold billions of gallons of toxic radioactive waste and historically are susceptible to failing, creating severe environmental impacts to properties adjacent to mining facilities.