The GST Leaching System from Geomatrix Systems uses a removable form to accurately shape and construct leaching fingers along the sides of a central distribution channel. It’s constructed with 3/4-inch washed stone and is surrounded with ASTM C-33 sand. The narrow profile of the leaching fingers and central distribution channel, combined with the uniform profile of the sand treatment media, enhances oxygen transfer efficiencies, resulting in thorough treatment of wastewater pollutants and a long-lasting leachfield. It can be configured with standard gravity, pressure and/or time-dosed distribution. 888/764-5247; www.geomatrixsystems.com.