By Bob Bostelaar, Ottawa Citizen, June 10, 2014

For decades, technicians at the Arnprior military base-turned-factory relied on
a solvent called trichloroethylene — TCE, for short — to clean grease from
aircraft parts. Only after the 1980s, when the compound was found to cause
cancer, did the aviation industry and other TCE users begin seeking safer
alternatives. via
Boeing wants help with cleanup of former Arnprior plant | Ottawa Citizen.