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_ � � MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) , <br /> A. FLOW Estimatcd Sewage Flows in Galluns pa day <br /> cgr�> <br /> Estimated � v gpd (see pages D-7 or I-3,4, 5) �m�� '; <br /> or measured -- gpd x 1.5 = - „�;�ms TyP�� TY�c�� Typ`��� �� <br /> B. SEPTIC TANK LIQUID VOLUMES 2 30o z�s �ao <br /> 3 450 300 218 � <br /> 4 f.00 375 256 °�'b` <br /> �- 1 a�o� I-�o�� gallons (see pages C-3 or C-5) s :�� 450 z9, "';;' <br /> 6 900 525 332 T��• <br /> 7 1050 600 370 m <br /> C. SOILS (refer to site evaluation) a �Zoo 6�5 4oe `d,�„' <br /> ,, „ ��K��-� <br /> 1. Depth to restricting layer = �� -tv 3y inches a;,,''T,, a�� Scplk Lnk C�paci�ic;in Ryll„„, <br /> �� Numbu of Minimum Liquid Liquid cypYcity v.�iih <br /> 2. Depth of percolation tests = I a inches ��m= c�.��h =ue.��ac,�.,i <br /> 3. Percolation rate � . 4 mpi zak�. ,�o „u <br /> 3 0`4 �Q(7p �50p <br /> 4. Land slope 5 % ,,`�9 � ;� <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br />� layer: Daily Flow x 0.83 = <br /> ��v gpd x 0.83 sq. ft./gpd = �a� sq. ft.-+io`5o=��y <br /> 2. Select width of rock layer (10 feet or less) _ /D ft. <br /> 3. Length of rock layer = Area + Width = <br /> ��� sq. ft.1 _�ft. _ •�� ft. Rock Bed <br /> r•l•!•1•t•t•r•!•f•r��•!•J•t�r <br /> ti.ti.ti.�.�.�.�.,.�.� . �.�.�.�. T <br /> f�l.J•t.t•t•l•�•l•I•t•t•!.r•f <br /> ti•ti•ti•ti•ti•ti•ti•ti•�•ti•ti•ti•ti•ti•ti• idth 510(t. <br /> . f•r•r•r•r•r•r•r �•r•r•f•r.r•r <br /> ���������•��~•�•�•�•�•'••�•�•'•• 1 <br /> E. ROCK VOLUME •f•l•�•:•:.�.:•:•:•r•f•:•f.r•: <br /> ►-- Length <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> �s�� sq. f t. x�.o a, ft. = 7� cu. f t. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> ��,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. _� tons. <br /> F. ADSORPTION WIDTH <br /> 1. Percolation rate in top 12 inches of soil is �.y mpi Absorption Width SizingTablc <br /> !'aroletlonRe� Gatlom Ra�ioof <br /> 2. Select allowable soil loading rate from table on page E-; ���,������pu Soil Texturc per day per Absom�ion width <br /> �(nch(MPI) squarc foot w Rock I.aya <br /> .4 S gpd/ft� w,a�n <br /> 3. Calculate adsorption width ratio by dividing rock layer F=.��.�,.�o.i• c�s� .-- ___ <br /> 0.1 b S Send 1.2(1 1.00 <br /> loading rate of 1.20 gpd/ft�by allowable soil loading rate; o.�a s•• Fine Sand'• o.�o z.�o <br /> 6 to!S Sendy L�wn 0.79 I.52 <br /> 1.20 gpd/ft2-�-��gpd/ft2= a.!�7 ia�o3o tA.m o.60 �.c�o <br /> 31 ro 45 Silt Loam 0.50 2.40 <br /> Check this z�ulue on page E-16. �b co ci.y� o.as z.�� <br /> 6o w�m ci.y o.z� s.on <br />. 4. Multiply adsorption width ratio by rock layer width to get s�m,;;�^ c��r -- -_-- <br /> required adsorpHon width; <br /> � a.�� x Io ft = a�. ft <br /> __ . . . 1 <br /> J <br />