Dioxin surrogates - are there any meaningful ones?

A number of easily measured pollutants have been offered up as dioxin surrogates - easily measured pollutants or process variables that consistently parallel dioxin emissions. Surrogates are a very attractive concept because the expense of direct dioxin measurement could be avoided. Also, the public can be assured that as long as easily and potentially continuously measured surrogates are within acceptable limits, people are not being exposed to excessive amounts of pollution. The question remains, however, is there a meaningful surrogate at conventionally regulated levels? Or, perhaps more importantly, at elevated levels that provide a comfortable margin of safety between normal operations and the conditions likely to represent elevated dioxin emissions?