The Baltimore County Council last night approved an eye-popping contract with BFI Waste Services. “$1.2 billion. . . billion?” Chairman Izzy Patoka exclaimed when the contract for hauling commercial garbage to a Virginia landfill was presented by Public Works Director D’Andrea Walker last week at a work session. “I think this is the biggest contract we’ve seen, at least during the time I’ve been here,” marveled the two-term Democrat.