For pesticides we are looking at 0.2 mg /L or 2 mg/ L, depending on the huge multiplication in the beginning and our additional 1000 fudge factor.(divide by 1000 to get the real number) Now let's assume we spray the whole orchid with 1000 liters of pesticide, that is 0.2 to 2 g of PFAS for an whole orchid.(divide by 1000 to get the real number)
Let's assume the orchid produces millions of oranges and each school child gets one a day, contaminated dangerous PFAS oranges. Assuming the whole plant is sprayed and the peel is washend and not even consumed, will it even be possible to detect PFAS inside the orange? I seriously doubt this.
On the other hand, waterproofing the shoes of a single child with PFAS using around 10 g of spray will contaminate a single school beyond any produce sprayed with pesticides on the outside. We all did that, for decades.
I'm not saying we shouldn't care about PFAS in pesticides and we shouldn't ban thoose. But we used them a lot and they called forever chemicals for a reason. Everything is contaminated with them forever. You find them everywhere in miniscule concentrations. Probably anything you consume contains PFAS only a few decades below the detection limit.
I don't know much about organic produce, but this type of panik article is quite common and usually damaging to the cause of removing a chemical from the production process. One can contaminate a complete organic farm, with a single spray can of waterproof 10000000 times the safe level.