Katie Gent, chair of the council's environment committee, said: 'The latest unsubstantiated leak which is predicted to be broadcast on BBC 2's Money Programme tonight is another in a long line of alleged leaks to the media aimed at conditioning us to the eventual acceptance of this enormous expansion of Heathrow.
'The airport is already handling over 64 million passengers a year, bringing excessive traffic congestion, aircraft noise and pollution to the area surrounding Heathrow. If the Terminal 5 complex is permitted, it will attract far more than 36 million passengers to the airport every year.
'This would, in turn, bring usage of the whole airport to a staggering 100 million passengers a year. The environmental and safety consequences hardly bear thinking about.'
Richmond upon Thames Council told the four-year public inquiry into T5 that the airport and airport jobs would continue to grow in a slower but sustainable way without the Terminal 5 complex.
However, if T5 is permitted the council fears the area around Heathrow will overheat and the environmental consequences for residents will be grim.