WaterTectonics worked with this southern California transfer station over a multi-year process to evaluate, select, pilot, and build an advanced stormwater treatment system for their facility. The facility was dealing with suspended solids, heavy metals, and chemical oxygen demand (COD) issues like many in the industry but was also being held to very low standards for phosphorus, nitrates, and bacteria. WaterTectonics started by conducting bench testing to narrow down the most efficient options. That was followed by deployment of a 100gpm pilot-scale system that operated for 3-4 weeks to collect additional performance insights specific to the client’s water. It also provided site personnel and other stakeholders with the opportunity for hands-on interaction prior to the design and construction of the full-scale system. In addition to chemical treatment, settling and filtration, the system also utilized granular activated carbon (GAC), ultraviolet (UV) treatment, and two separate polishing medias for additional phosphorus and nitrate reduction.