I don't remember that thread; how were you producing Ozone with an electric arc? With most of the transmission lines I have designed, Ozone doesn't become somewhat of a factor until around 230,000 volts when you start experiencing the corona effect, which is drastically reduced with the use of subphases(more than one wire per phase). What kind of transformer are you using to experience ozone formation?
Sed quis custodiet ipsos custodes?