Laserfiche WebLink
4• MOUND SIZiNG <br /> A. Catcutate Clean 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 Upslope Height: Clean Sond Lift (4.A)+medin depth (1 ft.) +cover (1 ft.) = Upslope Height <br /> 1.0 ft + 1.0 ft + 1.0 ft= 3.0 �ft <br /> D•34:SIoDe MulNplier Table <br /> Land 51ope i� 0 I 2 3 4 5 b 7 ? 4 t�; I I 12 13 l4 15 tQ 77 18 19 20 21 Y2 23 I4 15 <br /> UpSIOp? 3:i 3.iM) 2.91 Z.83 2.75 LRS Z.RI 2.Sa 2..18 Zai 2.36 2.31 2.26 211 2.'7 2.t3 2.a4 2.06 Lui 2.06 1.97 1.95 1.93 1.91 1.89 1.67 1.85 <br /> BF?rm RatiU �t:1 �i.00 3.85 3J0 3.57 3.�i5 3.33 3.13 3.12 3.03 2.9d 2.86 2J8 2.70 2.62 2.55 2.J8 2.at 2.?5 2.29 2.23 2.1& 2.13 1.08 2.03 1.98 1.93 <br /> Land Slope S6 � 1 2 i 4 5 6 7 8 9 10 /I 12 13 14 15 16 17 IF 19 20 21 22 23 24 25 <br /> GOt•Jf15lOp@ ?:t ?.QO 3.04 3.19 3.30 3.J1 ;.53 3.6E 3.00 3.i5 J.it J.29 4.d8 4.69 J.95 51J S.iS 5.88 6.2J 6.63 7.Q.3 7.-17 7.93 B.J2 8.93 4..J6 70.02 <br /> Berm Ratio �i:1 4.00 4.�7 a.35 a.S1 aJ6 5�0 5.2e S.Sb 5.e8 6.25 6.67 7.1d 7.69 8.T9 8.92 9.57 101d 10.94 11.67 12..32 73.19 t3.99 1.1.82 t5.67 26.5a t7.�.3 <br /> �. Select Upslope eerm Muttiplier <br /> (based on tand slope): 3.23 (figure D-34) <br /> D. Calcutate Upslope Berm Width:Multiplier (4.C)X!lpslope Mound Height (4.6) = Upslope Berm Width <br /> 3,23 ft X 3.0 ft = 10.0 ft <br /> E. Calculate Drop in Elevation Under Bed: Bed Width (2.6) X Land Slope (1.D) t 100=Drop (ft) <br /> 10.0 ft X 12.00 % : 100= 1.20 ft <br /> F. Calcutate Downs(ope Mound Height: Upslope Height (4.6)+Drop in Elevotion (4.E) =Downslope Height <br /> 3.0 ft + 1.20 ft = 4.2 ft <br /> Select Downslope Berm Multiplier <br /> G' (based on land slope): 4.95 (figure D-34) <br /> H. Calcutate Downs(ope Berm Width:Multiplier (4.G)X Downslope Height (4.F) =Downslope Berm Width <br /> 4.95 x 4.2 ft = 21.0 ft <br /> I. Calculate Minimum Berm to Cover Absorption Area:Downslope Absorption Width (3.B or 3.C) +4 ft. =ft <br /> 10.0 ft + � 4� ft = 14.0 ft <br /> L__ <br /> J. Design Downslope Berm =greater of 4H and 41: 21.0 ft <br /> K. Select Endslope Berm Muttipfier: 3.00 (usually 3.0 or 4.0) <br /> L. Calculate Ends(ope Berm (4.K)X Downslope Mound Height (4.F) =Endstope Berm Width <br /> 3.00 ft X 4.2 ft = 10.0 ft <br /> M.Calculate Mound Width: Ups(ope Berm Width(4.Dj +8ed Width (2.6) +pownslope Berm Width (4.J)=ft <br /> 10.0 ft + 10.0 ft + 21.0 ft = 41.0 ft <br /> N. Calculate Mound Length: Ends(ope Berm �dth (4.L) + Bed Length (2.C) +Endslope Berm Width (4.L) =ft <br /> 10.0� ft + 63.0 ft + 10.0 ft = 83.0 ft <br /> 5. ORGANIC LOADING: (Optional) <br /> A. Orqanic Loading = Design Flow X Estimated BOD in mg/L in the efftuent X 8.35 = 1,000,000 <br /> 750 �pd X mg/L X 8.35 : 1,000,000 = ��lbs BOD/day <br /> B. Calculate Syscem Organic Loading: lbs. 80D (5.A) :Bed Area (2.A) = lbs/day/ft2 <br /> tbs/day i ��ft2 = r��tbs/day/ftZ <br /> C. Recommended Organic Loading Rate: ��lbs/day/ftZ <br />