I hope everyone checks the math!!! Please confirm, any scientists out there!

The paper the data is from says - DOI 10.1007/s00244-015-0227-7:
20% chance of mortality at the lowest level supported by data is 62,000 parts per trillion (not 62 ppt as stated in the article)
Concentrations detected in Hawaii were between 800,000 and 19,200,000 parts per trillion.

It is a potential problem, for sure, but I feel like the data does not support an outright ban, since the studies conducted were all lab studies, not in the environment. Has anyone in Hawaii actually looked for the weird growth types of coral and fish like the ones shown in the paper? Maybe that's a good first step, not potentially putting a million people at risk of skin cancer...