One scrubber catches all, including pollution from tank farms and other processes. Also, the more efficient the scrubbing operation, the more contaminants will be concentrated in the scrubber liquor. Phosphoric acid reaction vessels are made of the alloy, Hastelloy G-30. The Hastelloy G-30 vessels only last for about three years before they are tossed or rebuilt. The vessels are corroded beyond use by the presence of fluorides and chlorides in the phosphoric acid.
Evaporation ponds are the catch-all for almost all toxic wastes.
Radioactive scale from reaction vessels and filters, phosphoric acid sludges, radioactive fluorosilicates chipped from scrubbing pads and chambers, and general toxic wastes are tossed into the mix. To make matters worse, evaporation pond water is always used in the pollution scrubbers because there are strict regulations regarding fresh water usage in Florida. It is not the same product. The most frightening aspect is that no two batches are the same, and the toxic effects can vary from batch to batch. The FSA is an ingredient in a complex product, and because of the nature of the chemical in the product, complex interactions have to occur during manufacture, e.g. heat, negative atmospheric pressure, catalyzing effects due to contact with metal vessels and additives.