Petrolia Mayor John McCharles put his shovel to work as officials marked the official start of construction of the Central Lambton Family Health Team office on Glenview Drive Tuesday morning. He was joined by officials from Southside Construction, Mary Pat Gleeson, the CLFHT chair, Mary Vergeer, CLFHT executive director and Dr. John Butler. The 19,500 square foot building is already under construction and is expected to complete in the fall. Seven doctors and other health professionals will make the building their home. There will also be some commercial space in the plaza.