>Lead tends to stabilize in-situ in most installations over time to be fairly safe and non-reactive. Messing with it or changing the environmental equilibrium i

>Lead tends to stabilize in-situ in most installations over time to be fairly safe and non-reactive. Messing with it or changing the environmental equilibrium is often what what increases risk / makes it a non-negligible risk. This is also true of heavy metal poisoning in human bodies. The treatment for metals poisoning is to ingest chelating agents which, in theory, bind to the heavy metals and carry them into the bloodstream, where they are then excreted via urine or other means. Unfortunately a sometimes side effect of this therapy is the unsettling of metals from, e.g. fat stores and the relocation of them into the brain, making things worse rather than better