[epithermal]

You are ignorant. Gasoline has from 20-30% benzene in it: http://www.elmhurst.edu/~chm/vchembook/515gasolinefs.html

E.P.A. Limits the Benzene in Gasoline by 2011

[Gondring]

You are ignorant. Gasoline has from 20-30% benzene in it: http://www.elmhurst.edu/~chm/vchembook/515gasolinefs.html

Sorry, but it generally has less than 1% by volume, but certainly less than 5%. IIRC, the initial limit your article mentions is 1.3% and then 0.6% later.

And some concerns about benzene in water is that the ingestion of contaminated water takes in more than the inhalation pathway, plus the intrusion of benzene vapor into occupied structures, where the exposures are concentrated because of low air-exchange.