Project of a 768m² Geomembrane lagoon to avoid soil contamination. Adama in Londrina has a shed with storage of chemical products, in case of activation of the fire system by bursting the sprinkler nozzles, this water that is released may become contaminated, which would cause damage to the soil, so this geomembrane is connected to the shed by a channel and the water flows directly into it, to be treated and have the correct destination. In addition, the pump house project was designed to ensure the proper functioning of this lagoon.