Let me Google that for you?
"Florida contains roughly 5 – 10 picocuries per gram (pCi/g) of radium while phosphogypsum from Central Florida contains about 20 – 35 pCi/g radium. "
"1 pCi of radium per gram of soil is likely to result in harmful health effects."
"What recommendations has the federal government made to protect human health?
The EPA has set a drinking water limit of 5 picocuries per liter (5 pCi/L) for radium-226 and radium-228 (combined). The EPA has set a soil concentration limit for radium-226 in uranium and thorium mill tailings of 5 picocuries per gram in the first 15 centimeters of soil and 15 picocuries per gram in deeper soil.
The federal recommendations have been updated as of July 1999."
Source:
https://wwwn.cdc.gov/TSP/PHS/PHS.aspx?phsid=789&toxid=154
You know they're going to build it before they test it. That's the Conservative way. So do you really even have a choice in the matter?