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Chapter 4-Site-Spec /nAtria/ Storm Water BMPs <br />What is It <br />Like containment diking, curbing is a barrier that surrounds an area of concern. Curbing functions <br />in a similar way to prevent spills, leaks, etc. from being released to the environment by routing <br />runoff to treatment or control areas. The terms curbing and diking are sometimes used <br />interchangeably. <br />Because curbing is usually small-scale, it cannot contain large spills like diking can, however, <br />curbing is common at many facilities in small areas where handling and transferring liquid materials <br />occur. <br />1-wz t"G <br />• <br />FIGURE 4.5 CURBING AROUND DRUM STORAGE AREA <br />I When and Where to Use It <br />Curbing can be used at all industrial facilities. it is particularly useful in areas where liquid materials <br />are transferred and as a storm water runoff control. <br />As with diking, common materials for curbing include earth, concrete, synthetic materials, metal, or <br />other impenetrable materials. Asphalt is also a common material used in curbing. <br />What to Consider <br />For maximum efficiency of curbing, spilled materials should be removed immediately, to allow <br />space for future spills. Curbs should have pumping systems, rather than drainage systems, for <br />collecting spilled materials. Manual or mechanical methods, such as those provided by sump <br />systems (see Sump BMP), can be used to remove the material. Curbing systems should be <br />maintained through curb repair (patching and replacement). <br />4-14