I am guessing they are not going to be doing the parkade cleaning seeing as how there are still a lot of cars parked in the P3 and P2 (residents side) areas. If they were going to tow the cars, they would probably need a fleet of tow trucks in order to tow them all...
Personally, if I were a tow truck driver ... i'd best not try to tow some of those pickups. Some of those pickups are probably gun carrying teenage psychopaths with machetes.
Cleaning
Actually, they were supposed to do an initial sweep (which they have) before doing the power wash. They are supposed to be towing cars out of the way before the wash. Not sure what time this will all come about, but if you (meaning anyone) hasn't yet moved your automobile from the residential side to the Impark side, do so NOW. Don't risk the towing charge for the 5 minutes it will take to relocate your vehicle.