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IV. STORAGE TIME: The Instant Storage Begins until the Peak Storage <br />is Attained (min). <br />T = -25 + 2706 <br />q0 <br />T = -25 + 2706 <br />0.47 <br />T = -25 + 76 <br />T = 51 min. <br />V. VOLUME OF WATER FLOWING INTO THE RETENTION BASIN PER ACRE <br />IMPERVIOUSNESS (FT'/AC). <br />4329T <br />Us = T + 25 - 4O qoT <br />V = 4329(51) _ 40(.47)(51) <br />s 51 + 25 <br />V = 2905 - 959 <br />V = 1946 FT'/AC <br />VI. MAXIMUM VOLUME OF WATER STORED IN RETENTIOA BASIN (FT ')(25-YR STORM) <br />VI = Vs x Area x CD <br />VT = 1946 x 1.22 x 0.56 <br />VT = 1330 Fi' <br />-2- <br />REVISED 3/30 B1 <br />