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C�'�g��O � CJ��Cssrc ST'�'.v�:�J�.�S - 9�5 Co� ��4er-� �a��j <br /> .�� �� •(Z��� MOUND DESIGN WORKSHEET <br /> �� 1�l (For Flows up to 1200 gpd) <br /> `� �D oor✓� v US� <br /> A. �,,QW Esumated Scwage Flow in Gallaff pa Day(gpd) <br /> Estimated �DO gpd \�anbcr � <br /> of Type[ Type II Type III Type IV <br /> or measured x 1.5 = g-pd. s��m5 <br /> � � 1�QD �i�� �v'M)DJ^� 3 4� 30p I 28 �� <br /> B. SEPTTC TANK LIQUID VOLU:�IES Ts��K a boo 375 ; zsb .� <br /> gdllOILS .�a a '� ��0� �Al. '�f�n.l�s 6 900 57S ' 332 e� <br /> � 1050 600 � 370 m�„ <br /> �C�5 �2D/�'1 ��J �j�C����'�� �S �i2 o�a✓e2 8 I200 675 ; 408 <br /> C. SOIIS (refer to site evaluation)- <br /> v�� w�� .�� <br /> �� r� c�.a.-u. <br /> a•E• 1. Depth to restricting layer = Ia. inches B��� �-° p„� <br /> 2_ Depth of percolation tests = ►a '' inches � `'"°"' `p"�`� <br /> 3. Percolation rate �a mpi 23 a� ,'000 i.soo <br /> s�b i.soo <br /> 4. Land slope �f-7 % ;o�a z000 3.000 <br /> ovc 9 See 6g.C-6 (z IS) <br /> D. ROCK LAYER DIME.�tSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer: A x 0.83 = <br /> oa gpd x 0.83 sq. ft./gpd = �-�9� sq. ft. <br /> 2. Select width of rock laver (10 feet or less) _ /0 ft. <br /> 3. Length of rock layer = a.rea =width = Rock Bed <br /> �98 sq. ft. 1 � ft. = 5o ft. ,.ti.�.ti.�.�.�.�.�.,.�.,.,.�.....� <br /> .f.f.�.,.f.f.f.,.f.f.,.,.f.,...f. <br /> ti.ti.�.�.ti......ti.�.�.,...�.�.�.�., <br /> .'.tifti:tirti:L.':'.:'.:`.�`.tirti:'.C'.ti'•:f{ idth <_10 ft. <br /> .t.l.l.l.l.t.l.r.l.l•r.J•J•/.J.I• <br /> ti.\•�•ti•�•�•�•ti•ti•ti.ti•ti.1•ti•ti•ti•\ <br /> .,f,;,f,f,f,f,;,;,f,f,f,r,r,�,f,f, <br /> E. ROCK VOLUME �"-- Length � <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> 49S sq. ft. x�ft. _ �cu. ft. <br /> 2 Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> '�g_cu. ft. = 27 = �_cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br /> � cu. yd. x 1.4 ton/cu. yd. = a7 tons. <br /> F. ADSORI'TION WIDTH qbsoroaon Width Sian Table <br /> 1. Percolation rate in top 12 inches of soil is I o mpi f'eccolahon Rate G"� "�d <br /> Vtinutes per�nch Soil Texture pe.�� �,m <br /> (mpi) tae .eooaa <br /> �h <br /> 2. Select allowable soil loading rate from table; Faster than 0.1 oarse Sand 1.2o i.00 <br /> 0•7 gpd/ft� 0.1 to� Sand 060 1.00 <br /> 0.1 to� Fne Sand" � <br /> 6 to 15 andy Loam 1 S2 <br /> 16 to 30 Loam �•� � <br /> 3. Calculate adsorption width ratio by dividing rock layer 31 to 45 Si]t Loam o50 2.�0 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; �6 to 60 Clav Loam o.�5 2.6� <br /> 61 t0120 Clay 024 5.00 <br /> 1.20 gpd/ftz= O.�9 gpd/ft� = I• So� Slower than IZO Clav - - <br /> "Soil havting�0%or more oF fine or very fine sand <br /> 4. Multiply adsorption width ratio by rock layer �vidth to get <br /> required adsorption width; <br /> .�x �ft = I5. Zft <br /> �si6N �`� '. �c'v��.o Pr�?�"�I1" �N�i�JEc��.v�, I° � , <br /> �om p��y ��e�,�sc No . � o mPc� 62 <br />