DownSpout StormFilter™

Industrial facilities generate pollutants, often as airborne particulates, which settle onto building rooftops and get washed into stormwater. In addition, galvanized coatings are used extensively in commercial and industrial roofing applications to protect steel from corrosion.

Zinc leaches into the rainwater as a part of the corrosion inhibition process. These pollutants, along with copper, lead and other metals, can contribute to exceedence of water quality standards and flow to waterways where they can be toxic to aquatic organisms. The affordable Stormwater Management Inc. DownSpout StormFilter, with its compact size, passive operation and strong performance can be easily rooftop runoff.

Applications

• General Manufacturing
• Aerospace
• Commercial Buildings
• Decorative Copper Gutters
• Light Manufacturing
• Metals

System Features and Benefits

• Modular and changeable StormFilter Cartridges allow upgrades without purchasing new equipment
• Second treatment stage may be added to increase removal efficiency
• Proven StormFilter technology targets site-specific pollutants
• Internal high flow by-pass
• System nearly dry between storm events
• Sample collection and viewing ports
• Tamper-resistant lid
• Simple, low cost installation
• Easy maintenance

General Specifications

• Occupies 2.5' x 5' footprint
• Fits most downspout configurations and sizes
• Single or dual cartridge models
• Treats up to 14,000 square feet of rooftop area per two-cartridge system

Typical Performance

Pollutant	Single-Stage Removal Efficiency	Two-Stage Removal Efficiency	Federal Benchmark Standard
Zinc	50-85%	75-95%	0.117 mg/L
Copper	60-90%	75-95%	0.0636 mg/L
Lead	65-90%	80-95%	0.0816 mg/L
Other Metals	50-90%	75-95%	---

Federal Benchmark Standard, Federal Register. Vol. 65, no. 210

Customer Examples

• Eastside Plating, Portland, OR - Zinc
• Seattle-Tacoma International Airport, Seattle, WA - Zinc
• Confidential Battery Manufacturer - Lead
• San Diego Galvanizing, San Diego, CA - Zinc