Commercial wastewater treatment plants from Jet Inc. are modular in design, are promoted to treat flows up to 300,000 gpd, and allow for phase build-out. This makes it possible for motels, shopping centers and service stations to be constructed along interstate highways far from any town. Subdivisions can be developed miles beyond sewer lines. Factories can be erected in rural areas. Plants treat wastewater through the aerobic digestion process that enables microscopic living organisms to transform wastewater into a clear, odorless liquid. 800/321-6960; www.jetincorp.com.