A stormwater management system was studied to see how it filters out heavy metals like iron, zinc, lead, chromium, copper, cadmium, and nickel from runoff. The researchers monitored 24 storm events between May 2010 and November 2012. They found that the system effectively separates heavy metals in runoff, with dissolved metals being affected by flow rates and total suspended solids, especially during heavy rain. On the other hand, particulate metals in discharge show more variability early on. This shows that how heavy metals are separated in stormwater systems is crucial for their performance and design. It's important to consider this when designing stormwater systems to effectively handle different storm events.