For the purpose of this ordinance, the following words, terms and phrases, shall have the meanings ascribed to them in this section: Campfire. Any small outdoor fire intended for recreation or cooking not including a fire intended for disposal of waste wood or refuse. Clean Wood. Natural wood which has not been painted, varnished or coated with a similar material, has not been pressure treated with preservatives and does not contain resins or glues as in plywood or other composite wood products. Cord. A unit of quantity for firewood, equal to 128 cubic feet in a stack measuring four feet by four feet by eight feet. Firewood. Split wood or unsplit wood logs cut into lengths not exceeding four feet (4') for the purpose of burning in accordance with this ordinance. Fire Chief. The Chief of the Mayville Fire Department or other person(s) authorized by the Fire Chief. Open Burning. Kindling or maintaining a fire where the products of combustion are emitted directly into the ambient air without passing through a stack or a chimney. Outdoor Burning. Open burning or burning in an outdoor furnace. Outdoor Furnace. Any furnace, boiler, stove, equipment, device, appliance, structure or apparatus, or any part thereof, which: