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� . � � . MOUND DESIGN WORKSHEEt <br /> (For Flows up to 1200 gpd) . <br /> A. �.�W 14nima�ed Sew�e�knw ie C�Ikn�pv d�y <br /> Estimated p d (see a�res D-7 or I-3,4,5) �- � �`"�� <br /> �Op p d um Y <br /> or measured — gpd x 1.5 = -- ���,� �'a� �'°° ��'�"��' �'� <br /> ' z 30o zu i�o <br /> B. SEPTIC TANIG LIQUID VOLUMES � °S0 '0° 21 w <br /> 4 60Q 77S 236 ww <br /> a --�r, n � galIons (see pages C-3 or C-5) '. 6 9 o su ii �•�� <br /> . � �oso � »o <br /> e �soo bn �a ..:. <br /> C. SOILS (refer to site evaluation) t, <br /> 1. Depth to restricting layer = ��1 -rn 3o v inches "°`"`T"'`c.'""`"+`"'""' <br /> �w�e�..r MM��iy�/ (.p�dpp.ay.�r <br /> 2. Depth of percolation tests = � a., inches �� �� �-*.+•� <br /> 3. Percolation rate � . 1 mpi ljr p ,a ;n <br /> 4. Land slope °!o ; ,`, ;;; �' <br /> ew�9 .. <br /> D. ROCK LAY�R DIMENSIONS - <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer: Daily Flow x 0.83 = , <br /> C� c. gpd x 0.83 sq. f t./gpd =�sq. f t. t�o`%a s'-!��' <br /> 2. Select width of rock layer (10 feet or less) = I o ft. <br /> 3. Length of rock layer = Area+ Width = <br /> s�'� sq. Et. i ��f t. _�,_f t. Rock Bed <br /> - tir•r•r.�•r r•r.f•r•r•r�.r•�iT�•r T <br /> •ti••.•ti•`�•'�•'\•ti•�.•5i•t•S•t•V•'r <br /> r•.�•.••j•j.r.j.f�l�r•t.j.t.f..• <br /> �••.•ti••,•ti••,•ti•ti• •,•�•ti.ti•ti• lifdth S10 tt <br /> r•�•f•r•�•.••r•r'��t•I•d•t•t•r <br /> E. ROCK VOLUME `•�•�•�•t•�•�•y�•�•1••••�••,•••• <br /> •l.j.f.j.f.f./.; ,�• .�•f.:•.�•j <br /> �-- Length <br /> 1. MulHply rock area by rock depth to get cubic feet of rock; <br /> ;y,�,sq. f t. x .�s f t. _�;cu. f t. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> �cu. ft. +27 = aL 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. y��i: = a�� tons. <br /> F. ADSORPTION WIDTH -c�m 4 tc�►r�r�, <br /> , � � Abaerption 1'Vtdth SitinX 1Lbic <br /> 1. Percolation rate in top 12 inches of soil is L mpi <br /> i'atolstloe Ra►e Wlloni Ruia of <br /> 2. 5elect allowable soil loading rate from table on page E-; �aM����.a. s���r�x��� r���.Y�� AMo�ia+wkhA <br /> � � Ineh IMY�) Wure fwM M Roek L <br /> , -�� SP�/r t� wN��h�' <br /> 3. Calculate adsorption width ratio by dividing rock layer Ftaeriiw�nA.1• �s.„e .._. _ <br /> o.�as se�a t.so �.00 <br /> loading rate of 1.20 gpd/ft�by allowable soil loading rate; .o.�w s•• ��s.�a•• o.�0 2.�0 <br /> 6 a 15 Saidy 4,rm 0.7v �.St <br /> 1.20 gpd/ft�+ . ��s gpd/f t2= � •Ce 7 . si o i s�i�°it.� °o.o i:.�«►o <br /> Check this value on pab�e E-l6. ,�b�, �''�,,�"" a�; s:w <br /> 4. Mulriply adsorption width ratio by rock layer width to get S��;;�� ��r --- --- <br /> , required adsorpHon width; , <br /> . �. r��x I v ft = d�,, ft <br />