To better understand the contribution of metals in urban air deposition into stormwater, a study was conducted at Terminal 18, a 200-acre container terminal located on Harbor Island in Seattle, WA. Although the National Pollutant Discharge Elimination System (NPDES) Industrial Stormwater General Permit (ISGP) does not make allowances in consideration of contribution from air deposition into stormwater, understanding the contribution of copper and zinc may assist in the selection of appropriate operational source control and stormwater treatment best management practices (BMPs).
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