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0 <br />Chavter 4-Site-SpecKc Industrial Storm Water BMPs <br />• <br />What Is It <br />Dust controls for material handling areas are controls that prevent pollutants from entering storm <br />water discharges by reducing the surface and air transport of dust caused by industrial activities. <br />Consider the following types of controls: <br />• Water spraying <br />• Negative pressure systems (vacuum systems) <br />• Collector systems (bag and cyclone) <br />• Filter systems <br />• Street sweeping. <br />The purpose of industrial dust control is to collect or contain dusts to prevent storm water runoff <br />from carrying the dusts to the sewer collection system or to surface waters. <br />When and Where to Use It <br />Dust control is useful in any process area, loading and unloading area, material handling areas, and <br />transfer areas where dust is generated. Street sweeping is limited to areas that are paved. • <br />I What to Consider <br />Mechanical dust collection systems are designed according to the size of dust particles and the <br />amount of air to be processed. Manufacturers' recommendations should be followed for <br />installation (as well as the design of the equipment). <br />If water sprayers are used, dust-contaminated waters should be collected and taken for treatment. <br />Areas will probably need to be resprayed to keep dust from spreading. <br />Two kinds of street sweepers are common: brush and vacuum. Vacuum sweepers are more <br />efficient and work best when the area is dry. <br />Mechanical equipment should be operated according to the manufacturers' recommendations and <br />should be inspected regularly. <br />• <br />4-42