The ceremonial groundbreaking for the parking garage to be constructed next to the SunTrust Tower Downtown isn’t scheduled until 4 p.m. today, but The Haskell Co. was set up on the site Monday. Plans filed with the city by Parador Partners, owner of the office tower, call for a 607-space, six-level garage with ground level retail space along the Hogan Street side of the structure. Ashish Bahl, who owns the tower, said the parking garage should be finished about September at a cost of $10 million.