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S442 BMPs for Labeling Storm Drain Inlets On Your <br /> Property <br /> Description of Pollutant Sources: Waste materials dumped into storm drain inlets can have <br /> severe impacts on receiving waters. Posting notices regarding discharge prohibitions at storm drain <br /> inlets can prevent waste dumping. Storm drain signs and stencils are highly visible source controls <br /> that are typically placed directly adjacent to storm drain inlets. <br /> Pollutant Control Approach: The stencil, affixed sign, or metal grate contains a brief statement <br /> that prohibits dumping of improper materials into the urban runoff conveyance system. Storm drain <br /> messages have become a popular method of alerting the public about the effects of and the pro- <br /> hibitions against waste disposal. <br /> Applicable Operational BMPs: <br /> Label storm drain inlets in residential, commercial, industrial areas, and any other areas <br /> where contributions or dumping to storm drains is likely. <br /> . Stencil or apply storm drain markers adjacent to storm drain inlets to help prevent the <br /> improper disposal of pollutants. Or, use a storm drain grate stamped with warnings against pol- <br /> luting. <br /> . Place the marker in clear sight facing toward anyone approaching the inlet from either side. <br /> . Use a brief statement and/or graphical icons to discourage illegal dumping. Examples <br /> include: <br /> • "No Dumping—Drains to Stream" <br /> O "No Pollutants—Drains to Puget Sound" <br /> • "Dump No Waste—Drains to Lake" <br /> • "No Dumping—Puget Sound Starts Here" <br /> . Check with your local government agency to find out if they have approved specific signage <br /> and/or storm drain message placards for use. Consult the local agency stormwater staff to <br /> determine specific requirements for placard types and methods of application. <br /> . Maintain the legibility of markers and signs. Signage on top of curbs tends to weather and <br /> fade. Signage on face of curbs tends to be worn by contact with vehicle tires and sweeper <br /> brooms. <br /> . When painting stencils or installing markers,temporarily block the storm drain inlet so that no <br /> pollutants are discharged from the labeling activities. <br /> Optional Operational BMPs: <br /> Use a stencil in addition to a storm drain marker or grate to increase visibility of the message. <br /> Reference for this BMP:(CASQA, 2003) <br /> 2019 Stormwater Management Manual for Western Washington <br /> Volume IV- Chapter 7-Page 604 <br />