Guardian: Pollution Toxic waste clean-up on Olympic site cost taxpayers £12.7m The contamination, on a site formerly occupied by Banner Chemicals, is much worse than expected, says the Environment Agency The government has spent £12.7m cleaning up a part of the Olympic site in east London that was “grossly contaminated” with toxic waste left behind under a chemical storage facility that was bulldozed to make way for the main stadium. The contamination, on a site formerly occupied by Banner Chemicals…