What sort of risk of environmental poisoning comes from having that many solar panels in an area? Is there any risk that it can contaminate the area or are the environmentally safe?

I speak this having lived south of Moffett airfield where the entire area was poisoned from the degreasers used on the military planes in Moffett Field. It's one of the largest Superfund sites in the US and there are thousands of families living there. It might seem innocuous but I'm wondering whether solar panels in the environment leak any chemicals.