The Lincs and Notts Air Ambulance charity says the site is "essential" to help meet demand.
The Environment Agency has blamed a third party for Monday's rise in ammonia levels in the River Ouse.
Sue Parton's late husband handmade over 650 Formula 1 model cars which she is now exhibiting.
Health officials have said they think there is "suitable justification" to look again at Tollerton Park.
The council says developers are yet to submit detailed traffic modelling data for the project.
The site of the charity's current base in Nottinghamshire has been sold to developers.
The local plan, which gives the land for 4,000 homes, has provoked opposition from the community.
A service has been extended out to include villages including Cropwell Bishop and Tollerton.
Harry Archer, Luke Newton and Pearce Haran were all killed in the crash on 22 May.
