Televised ducts under slab floor. Ducts are spiral wound galvanized ducts and are extremely rusted allowing white dust to enter into the house. Suggest spin cast mortaring to restore the structure then spray lining with Duct Armor duct lining material. Downspouts are needing to be extended all around the entire building and the grading is flat against the building on the side of the house. Should be raised and graded away