Fourth-bottom Scunthorpe's 2-1 defeat at Bury on Tuesday night leaves 18th-placed Town six points clear of the drop zone with two matches of the season remaining, while they also boast a far superior goal difference.
The job can finally be completed this weekend as Town make the trip to Colchester while the Iron travel to promotion-chasing MK Dons, and it will be a job worth celebrating in what is Town's first season back in England's third tier since 1997.
"With the way the results went on Tuesday it would have to be an absolute disaster for us to go down," Turner told Town's official website. "There would have to be a 19-goal change in goal difference.
"We're six points clear of Scunthorpe who have two games left and it's only goal difference now that can change it so we're almost home and dry."