If Council really wants to protect us from toluene vapours, they should insist that petrol stations capture petrol fumes. Petrol is about five per cent toluene, used as an octane booster. Filling a tank, or driving in traffic, exposes us to vastly more toluene than whatever escapes from the soil. Toluene is also a common solvent for many household items, such as glues.
Your article also reports an egregious error. Toluene is not water-soluble. So, in my opinion, the discovery of traces of toluene in soil is being used as an excuse. But for what? Please let us know. This is the real story.