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I62.5 ft X 10.0 ft X 1.0 = 625.0 ft3 Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 625.0 ft3 _ 27 = 23.1 yd3 Add 20% for constructability: 23.1 yd3 X 1.2 = 27.8 yd3 B. Calculate Clean Sand Volume: Upslope Volume: ((Upslope Mound Height - 1 )x 3 x Media Length) +2 =cubic feet (( 4.0 ft - 1) X 3.0 ft X 62.5 )_2 = 281.3 ft3 Downslope Volume: ((Downslope Height- 1) x Downslope Absorption Width x Media Length)+2 = cubic feet (( 4.7 ft- 1) X 3.0 ft X 62.5 )+ 2 = 346.9 ft3 Endslope Volume: (Downslope Mound Height - 1) x 3 x Media Width = cubic feet ( 4.7 ft- 1 ) X 3.0 ft X 10.0 ft = 111.0 ft3 Volume Under Rockbed: Average Sand Depth x Media Width x Media Length = cubic feet 2.4 ft X 10.0 ft X 62.5 ft = 1468.8 ft3 Total Clean Sand Volume: Upslope Volume + Downslope Volume +Endslope Volume + Volume Under Media 281.3 ft3 + 346.9 ft3 + 111.0 ft3 + 1468.8 ft3 = 2207.9 ft3 Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 2207.9 ft3 + 27 = 81.8 yd3 Add 20%for constructability: 81.8 yd3 X 1.2 = 98.1 yd3 C. Calculate Sandy Berm Volume: Total Berm Volume (approximate): Average Mound Height x Mound Width x Mound Length +2 =cubic feet ( 4.4 ft X 41.0 ft X 88.5 )+ 2 = 7892.0 ft3 Total Mound Volume - Clean Sand volume= cubic feet 7892.0 ft3 - 2207.9 ft3 = 5684.1 ft3 Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 5684.1 ft3 _ 27 = 210.5 yd3 Add 20%for constructability: 210.5 yd3 x 1.2 = 252.6 yd3 D. Calculate Topsoil Material Volume: Total Mound Width X Total Mound Length X.5 ft 41.0 ft X 88.5 ft X 0.5 ft = 1814.3 ft3 Divide ft3 by 27 ft3/yd3 to calculate cubic yards: 1814.3 ft3 _ 27 = 67.2 yd3 Add 20%for constructability: 67.2 yd3 x 1.2 = 80.6 yd3 I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws. [ Joseph J Olson810 12!4/2008 (Designer) "--T--;gnature) (License#) (Date)