3. A settling tank has an overflow rate of 100,000 gal/^2 d. L sizes enters the tank. The sediment has the following distribu Settling velocity (ft/min) 10.0 5.0 2.0 1.0 0.75 0.50 Mass fracti 0.54 0.45 0.35 0.20 0.10 0.03 What is the gravimetric percentage of sediment particles com (A) 32% (B) 39% (C) 47% (D) 55%

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.