Televised ducts under slab floor. Ducts are pvc with metal fittings. There was slight standing water in the one run. Metal is showing slight signs of rust. Gutters look like they need to be cleaned as water is sheeting over next to the building during rains. Once water is resolved the ducts should be spray lined with Duct Armor duct lining material to rebuild rusty metal and encapsulate the pvc for possible mold.