Environmental disaster has been averted for now but France is taking no risks after a tanker carrying thousands of tons of toxic chemicals sank off the Normandy coast, Reuters reported President Jacques Chirac as saying. Visiting an emergency operations center in Cherbourg, northwestern France, Chirac said information was still being gathered on how best to recover the chemicals that officials said were already leaking from the Italian tanker Ievoli Sun, which sank in the English Channel on Tuesday. "It's escaping in bursts," Cherbourg maritime captain Jean-Francois Choquart said. "It has to be styrene that has escaped from a forward storage tank…