Blake and Maple, 6-month-old sisters, look through the sunflower garden growing outside their window on Maple Street in downtown Lewiston on Wednesday evening. Cat owner Ari Rosenberg said the sunflowers were planted where the apartment building’s driveway once was. During a process called bioremediation, the sunflowers will help remove lead from the soil so that the contaminated area can be converted to usable garden space. Six people share ownership of the building, called Faire-Op, Lewiston’s first housing cooperative.