What do you know about ozone treatments for your house?

I moved into an apartment that has a mold problem beneath the kitchen sink. I’m pretty upset about it. The complex is going to change out the garbage disposal and replace the bottom of the cabinet, but they also offered to do an ozone treatment, which I had never heard of before. I found this link. I also saw some very negative things online about how it can be very bad, and some people got very sick from it. A jelly I very much trust was familiar with it and said it is natural and ok to do. But, I wanted to see what the collective says.

I still don’t know what chemicals it uses? Or, what exactly it does. I know you can’t be home when it is done and that even plants are negatively affected by it.

Do you know what chemicals it uses? Would you consider it safe?