Landfills are designed to prevent that sort of leaching. There’s an interesting Practical Engineering article / video about it: https://practical.engineering/blog/2024/9/3/the-hidden-engin...

Maybe but contaminates off plastic bottles in controlled landfills isn't my biggest concern. Contaminates from PFAS and microplastics off car tires and clothing are massively worse. Solid plastic is _fairly_ inert at least compared to most of the other pollutants we are pumping out.