Cllr Paul Murphy told Granada Reports the policing operation at the Worsley Marriott will cost £30,000 a day.
It includes 28 constables and four sergeants. G4S should have had 58 of their staff on the site, but only about a third turned up for the lock-down.
Greater Manchester Police say they were drafted in to cover a shortfall in Olympic security at a Worsley Hotel.
Police in Greater Manchester have been drafted in to boost security for Olympic athletes staying in the city.
The officers were called in after a "shortfall" in security services was discovered.
They were posted at the Worsley Marriott Hotel, where some athletes are staying.