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The U.S. Navy has developed, tested, and patented a stormwater runoff treatment system that meets stringent military and government regulations for industrial sites. The system is similar to a sand filter; however, instead of using sand, heavy metals, in particular, zinc and copper, are removed by a bed of special filter-adsorption materials.
Military and industrial sites must comply with increasingly stringent pollutant discharge requirements. Most commercially available stormwater runoff systems are not built to handle the high metal content present in military and industrial runoff. The Navy system meets strict regulatory requirements cost-effectively.
- The Navy system has consistently exceeded regulatory requirements while the previous system met requirements only one-third of the time
- The subject treatment system costs approximately $20,000 per acre of watershed compared to at least $57,000 per acre for the previously installed commercial technology
- The technology requires a smaller amount of space compared to competing technologies, making it attractive for cramped military and industrial sites
- Media bed expected to last at least 15 years before requiring replacement with routine upkeep expected to consist of removing and replacing the top inch of gravel on the bed annually
- US patents 7,025,887 and 7,160,465 available for license