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' � MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) <br /> A. FLOW Estimatcd Scwagc Flows in Galluns pa day � <br /> Estimated � c� gpd (see pages D-7 or I-3, 4, 5) Ivumix:r �g�� � <br /> or measured -- d x 1.5 = -- or Typc I Typc 11 Type 111 TY� <br /> gP I�cdrooms 1 V <br /> z soo zu �so <br /> B. SEPTIC TANK LIQUID VOLUMES 3 aso �oo z�s � <br /> 4 G00 375 25G ���� <br /> I-►aS d -� 1-/Oo� gallons (sC�pages C-� or G5) 6 900 'su 3n T�Q�. <br /> 7 1050 600 370 m <br /> 8 1200 675 408 �d�d <br /> C. SOILS (refer to site evaluation) ,, <br /> 1. Depth to restricting layer = ����%� a � inches Scp�icT.okC.y.<litiwinx.��,,,,, <br /> Vuni!xr of \finrwm Liq��d�I.iquid rap�x�ity�+�th <br /> 2. Depth of percotation tests = � a " i�lches ���w�m= ��:�a�;i, Ya�b�b���.�,.� <br /> 3. Percolation rate I '-1 . 1 mpi 2or1ci 'S0 "u <br /> 3 a a �a� isao <br /> 4. Land slope lo % �°aa9 '� o <br /> o..«9 -•—•• <br /> D. ROCK I.AYER 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-t���-��`�`y� <br /> 2. Select width of rock layer (10 feet or less) _ /G ft. <br /> 3. Length of rock layer = Area -t- Width = <br /> ��y sq. ft. _ � ft. _ � ft. Rock Bed <br /> f•l•l•l•t�t�f�r�:�f•.'�f�l�l�: <br /> ti••.••.•ti•ti•t�ti•ti�'.••.•'.�'.•ti�'.•'.• <br /> tiftifti�:rtiftifti�ti•':fti'•:'ti'tif:f�.�Width 5]0 ft. <br /> . f,f,f,f,f,f,f,f,f,;,f,f,;,f,f <br /> ,.ti.•,.ti.•,.�.•,.•,.•,.•,.•,.•,..�. <br /> E. ROCK VOLUME ����—�L.ength��—� <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> �_sq. f t. x .Ln,�f t. _ � cu. f t. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> �1 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. = 3� tons. <br /> F. ADSORPTION WIDTH cu4K to�vy� <br /> Absorption Width Sizing7'ablc <br /> 1. Percolation rate in top 12 inches of soil is l�t. 1 mpi <br /> Percolation Ratc Galions Ratio of <br /> 2. Select allowable soil loading rate from table on page E-; in Minules pu so��T�x��« (�cr day per Absorpiion wid�h <br /> .�i.� gpd/f t� �^�n cMY'� squarc fooc �o Rock Laya <br /> w<��n <br /> 3. Calculate adsorptian width ratio by dividing rock layer Faster[han 0.1• c�s� ----- -.--- <br /> 0.1 to S Sand 1.20 I.00 <br /> loading rate of 1.20 gpd/ft�by allowable soil loading rate; o.��os•• Fine Sand•• o.�o z.�o <br /> 6 to 15 Sxndy Loam 0.79 1.52 <br /> 1.20 gpd/ftz=�� gPd/ftz- �.l��1 36 to 45 s���Oei.�„ o o i:.`w <br /> Check this value on a e E-16. 46�o�o Cley Loa�n o.ss 2.�� <br /> P 8 6o a,zo c,3y o.za s.uo <br /> 4. Multiply adsorption width ratio by rock layer width to get s�o�:;a� c�ay .---- ----- <br /> required adsorption width; <br /> �.(,'� x �ft = ��. ft <br /> 1 <br />