I can kick that off. Again, I'm just going by what I've read on the subject.
There are issues about what they call chronic toxicity. There's acute toxicity, which means it will kill something right away, and then there's chronic toxicity, which means the effects would build up. There are studies being done to address that issue. There's also the issue of the salinity itself. Having such high salts in the water affects what it can be used for. There are also studies looking at certain organic contaminants other than the naphthenic acids. Those are the issues around the toxicity of the water.