"BATON ROUGE, La. -- Shirley Bowman noticed the smell after 8 a.m. on June 14, 2012, her 61st birthday. In Baton Rouge, where the petrochemical industry dominates the landscape, foul odors resembling burnt rubber or propane are perennial. But this odor, caustic and potent, seemed especially foul — 'like some sort of chemical,' she recalls."
"Bowman found her daughter crying over a migraine. Her neighbors experienced headaches, dizziness, nausea. One family reported a toddler son coughing up phlegm; another, an elderly father collapsing on the floor. She soon suspected the cause: A leak of 'steam-cracked' naphtha, a liquid mixture of volatile petrochemicals, occurring at the ExxonMobil Baton Rouge petrochemical complex a half mile away.
Four hours earlier, Exxon operators detected an odor in the East area tank field, and discovered a 'bleeder' valve on Tank 801 dripping naphtha into a sewer. The leaky valve dumped 411 barrels into the underground system, company records filed with the state show. The liquid traveled a mile before pouring into a separator pit, vaporizing along the way, and releasing tens of thousands of pounds of benzene and other toxic chemicals into the air."