Our perforated detention systems can allow for percolation into the soil for groundwater recharge, or solid, containing the storm event for a controlled release into a municipal storm sewer. Underground systems are closed, mitigating and decreasing the health risks and thermal impacts associated with open water storage. This total approach provides developers a valuable tool to gain land for parking or green areas for aesthetic enhancement. Above ground detention system products are found under our Geosynthetics/ Clay Mat and Liner products. CFG,Inc. also provides site specific PVC drain basins custom fitted to the job specification. Grates and all accessories are also available.