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4. MOUND SIZING <br /> A. Calcutate Cleon Sand Lift: 3 feet minus Depth to Limiting Condition (1.C) =C(ean Sand Lift (1 ft minimum) <br /> 3.0 ft - 2.0 ft = 1.0 ft <br /> B. Calculate Ups(ope Height: Clean Sond Lift (4.A) +media depth (1 ft.)+cover (1 ft.) =Upslope Height <br /> 1.0 ft + 1.0 ft + 1.0 ft= 3.0 ft <br /> D-34:Slope 1.lultiplier Table <br /> Land Slope% 0 I 2 3 4 5 6 7 8 9 10 t1 I2 13 ta t5 16 17 18 /9 20 2f 22 23 24 25 <br /> UpSlOp2 3:1 3.OQ 2.91 2.83 2.75 2.68 2.61 2.SJ 2.J8 2.J2 2.36 2.31 2.25 2.21 2.17 2.13 2.C9 2.06 2.03 2.00 1.97 1.95 1.93 1.91 1.89 1.87 1.85 <br /> Berni Ratio a:t 4.Q0 3.85 3.70 3.57 3.d5 3.33 3.23 3.12 3.03 Z.4J 2.86 2.78 2.70 2.62 2.55 2.:t8 Z.41 2.35 2.29 2.23 z.18 2.13 2.aB 2.D3 1.98 1.93 <br /> Land$lope:; 0 1 2 3 4 5 6 7 8 9 f0 11 12 13 14 IS ib 17 18 19 20 21 22 23 24 25 <br /> UO�•l�SlOp2 3:1 3.00 3.09 3.19 3.30 3.�7I 3.53 3.66 3.80 3.95 J,ii J.29 .i..t8 J.69 y.95 5.2J 5.55 5.88 6.2:1 6.63 7.OJ 7.d7 7.93 8.d2 6.93 9.J6 t0.D2 <br /> B?I'm Ra[iU J:1 4.00 a.t7 .3.35 a.5-t aJ6 S.CO 5.26 5.56 5.88 6.25 6.67 7.14 7.69 8.29 8.91 9.57 10.24 10.9J it.67 12.a2 t3.i9 13.99 1a.82 15.67 16.SJ 17.d4 <br /> � Select Upslope Berm Multiplier <br /> (based on land slope): 2•$6 (figure D-34) <br /> D. Calculate Upslope Berm Width: Multiplier (4.C)X Upslope Mound Height (4.6) =Upslope Berm Width <br /> 2.86 ft X 3.0 ft = 9.0 ft <br /> E. Calculate Drop in Elevation Under Bed: Bed Width (2.6) X Land Slope (1.D) : 100=Drop (ft) <br /> 10.0 ft X 12.00 % : 100= 1.20 ft <br /> F. Calculate Downslope Mound Height: Upslope Height (4.6) +Drop in Elevation (4.E) =Downslope Height <br /> 3.0 ft + 1.20 ft = 4.2 ft <br /> Select Downs(ope 8erm Muttiplier <br /> �� (based on land stope): 4.69 (figure D-34) <br /> H. Calculate Downslope Berm Width:Muttiplier (4.G)X Downslope Height (4.F) =Downslope Berm Width <br /> 4.69 x 4.2 ft = 20.0 ft <br /> 1. Calculate Minimum Berm to Cover Absorption Areo: Downslope Absorption Width (3.6 or 3.C) +4 ft. =ft <br /> 10.0 ft + � ft = 14.0 ft <br /> J. Design Downslope Berm =greater of 4H and 41: 20.0 ft <br /> K. Select Endslope Berm Multiplier: 3.00 (usually 3.0 or 4.0) <br /> L. Calculate Ends(ope Berm (4.K)X Downstope Mound Height (4.F) =Endslope Berm Width <br /> 3.00 ft X 4.2 ft = 12.0 ft <br /> M. Calculate Mound Width: Upslope Berm Width(4.D)+ Bed Width (2.B) +pownslope Berm Width (4.J} =ft <br /> 9.0 ft + 10.0 ft + 20.0 ft = 39.0 ft <br /> N. Calculate Mound Len�th: Endslope Berm Width (4.L} + Bed Length (2.C) +Endslope Berm Width (4.L) =ft <br /> 12.� ft + 38.0 ft + 12.0 ft = 62.O�ft <br /> 5. ORGANIC LOADING: (Optional) <br /> A. Organic Loading = Design Ftow X Estimated BOD in mg/L in the effluent X 8.35 : 1,000,000 <br /> 450 gpd X mg/L X 8.35 : 1,000,000 = �lbs BOD/day <br /> B. Calculate System Organic Loading: lbs. BOD (5.A) :Bed Area (2.A) = lbslday/ft2 <br /> lbs/day = �ft2 = �lbs/day/ftz <br /> C. Recommended Organic Loading Rate: �lbs/day/ft2 <br />