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• <br />Chapter 4-Site-Specific Industrial Storm Water BMPs <br />• <br />t. <br />Compacted Soil <br />??I , !II_ ? ?.R.'.. •C'?'-___tTTr?_ylfll = I -11?__ <br />{ 'l{ -: - - - <br />a:1"'i ?1'?-.:3!'ll '-n•f. illli= f' :- •• fill- ..???Gi`?=11(T' _f; r=irq'C?TIT <br />Typical Concrete-Lined Ditch Typical Grass-Lined Ditch <br />• <br />-• Pii _ <br />Filter Layer <br />IN 'A <br />Trapezoidal Riprap Channel <br />'. Z Filter layer, gravel <br />or fabric <br />Vegetated Parabolic-shaped Waterway with Stone Center Drain <br />w <br />213 W <br />':-?- Filter layer. <br />gravel or fabric <br />• <br />Typical Riprap Channel <br />lI <br />Vegetated V-shaped Waterway with Stone Center Drain <br />w <br />?n„=1,u Filter layer. <br />gravel er fabric <br />(Modified from Commonwealth of Virginia, 1980) <br />FIGURE 4.1 TYPICAL STORM WATER CONVEYANCE CROSS SECTIONS <br />4-5