If you are travelling from the Stockport / Sale area towards the M62 (Trafford Centre on your right) it is on your left. The one on the right is part of the sewerage treatment works and has been designated as part of the Emergency Exit route from the proposed stadium.
There are two sites on your left, one either side of the canal i assume that the one closest to Barton Aerodrome is the Salford site was just wanting this confirmed