LemTec™ Modular Insulated Cover System utilizes a patented floating modular cover consisting of individual casings of closed-cell extruded polystyrene insulation encapsulated by two sheets of durable, 10 year UV-resistant, high density polyethylene (HDPE) geomembrane.  Individual casings are laced together during installation to form a complete cover over the liquid in the basin. The cover offers insulation R-factors ranging from 10 to 30 and a geomembrane capable of withstanding even the most severe environmental conditions. This innovative, adaptable design shields the water column from sunlight to prevent algae growth, controls odors and provides an insulated environment for heat retention to enhance biological reaction rates.  This warmer environment provides conditions conducive to the reduction of biochemical oxygen demand (BOD), the reduction of total suspended solids (TSS) and the enhanced performance of aerobic and anaerobic processes. The LemTec™ Modular Cover System is the only system in the world that solves ponding and ballooning problems with non-mechanical, around-the-clock, guaranteed service. Unique LemTec™ design allows rainwater to pass between the individual casings and gases to escape. Each LemTec™ Cover is custom engineered and configured to meet specific basin requirements.