Test students' ability to apply stormwater design principles to a small property: given roof and lot areas and a specified storm depth, have learners calculate runoff volumes (using provided runoff coefficients), size a rain garden (surface area and effective depth) to capture the event, select 3–5 appropriate local native plants and justify choices for infiltration and pollutant uptake, and estimate percent reductions in runoff plus removals of sediment, nitrogen, and phosphorus using given typical removal rates; require clear assumptions, step-by-step calculations, units, and brief explanations.