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, � <br />� Mound Design Worksheet (For flows up to 1200 gpd) <br /> All boxed�angles must be entered,the nast will be calculated. q�1:6in�d Sewope RoNi in Gdan Per DaU <br /> A FLOW <br /> Estimated 750 9pd(see 69we A-1) ' era <br /> or measured 0 x 1.5(safety factor)= 0 gpd be�ioar� U�s I C�s q Qa�s pl C�N <br /> 2 300 225 180 60l6 <br /> B. SEPTIC TANK LIQUID VOLUMES 3 450 300 218 of ihe <br /> Septic tank capacity 2-1300 galbns(see frgure G1) 5 750 450 294 n�e <br /> C. SOILS(Site evaluatia►data) 6 900 525 332 G�ss l <br /> 1. Dep1h bo restriding layer= 1 feet 7 1050 b00 370 1,a� <br /> 2. Deptl�of peroolation tests= ��S 8 1200 675 !08 cdm�a. <br /> 3. Texture Silt loam <br /> 4. Soil loading rate(see F'gure D-33 0.6 gpol ft� <br /> Percdation rate 31 to 45 MPl <br /> 5. %Land Slope 4 % o-a�: Absorptlon Wldth Sf�t�Tabk <br /> Pacol�tiam Rate Lo�R�te <br /> i��pa 5oi1 Textore Gtbm �oa <br /> C-1: Sc k Tank C tks op�l � ,�� <br /> Irqtud capacity F�m.�s cw...s.m �.Zo i.00 <br /> Number a�' Minimum Liquid l�quid capacity with anth disposal8c �s.�,�0a <br /> Bedrooms Capaary 8�1�8��� lift inside F Ys.� <br /> 2 or less 750 1125 00 <br /> 3 or 4 1000 1500 1� a i w,s siu�.o.m o:so Z.�o <br /> 5 or 6 150Q 2250 � �s w eo a� o.,s 2.6� <br /> 7,8�9 ZI)00 3000 � � <br /> 61 w l20 Silty C7ay 0.24 5.00 <br /> � <br /> Slower tbn 1 <br /> 'Sfar daia�d(ar srw�oi4 w e�a6r or wro�n <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Mul�ply average design flow(A)by 0.83 to obtain requi�ed area of rodc layer.Item A x 0.83= <br /> 750 gpd x 0.83 ft�gpd= 630.0 fl� <br /> 2. Determine rodc layer width =0.83 ft�/gpd x Linear Loadin Rate(LLR)(see LLR chart) <br /> 0.83(t�/gpd X 12 = 10.0 ft <br /> LLR Chart <br /> Perk Rate LLR <br /> <120 MPI <=12 <br /> >=120 MPI <=6 <br /> 3. Length of rodc layer=area divided by widtl�= <br /> 630 ftZ / 10 feet= 63.0 feet <br /> E. ROCK VOLUME <br /> 1. Multiply rodc area by rodc depth to get cubic feet of rodc <br /> 630 X 1 ft= 630.0 fC� <br /> 2. Divide fC�by 27 ft�3 to get cubic yards <br /> 630.0 ft� / 27 = 23.3 yd3 <br /> 3. Mul�ply cubic yards by 1.4 b get weight of rodc in 6ons; <br /> 23.3 yd3 X 1.4 toNyd3 = 32.7 tons <br />