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. MOUNI7 DESIGN WORKSHEET 5 <br /> (For Flows up to 1200 ggd) <br /> A. FLOW Estimnted Sewage Flow�j in G�Ilons per day <br /> Estimated DC� �d Numbv T�� Tra a Tra m T� <br /> or measured x 1.5 = gpd. �s�u <br /> 2 300 225 180 � <br /> B. SEPTIC TANK LIQUID VOLUMES a 6o s00 zs� °f''� <br /> Z�O O ��� <br /> gallons 6 '90500 `su 3�z T,'�,. <br /> � ioso 60o s�o u a <br /> 8 1200 675 408 � <br /> C. SOILS (refer to site evaluation) , ,� , `°'"'°"S <br /> Se lic Tank C�aali s(in alluns) <br /> 1. Depth to restricting layer = � inches Z � feet �q�;d�,��,y <br /> NwMcr�if Minimum[Jyuid I�yuid�yuciry with with Aispas:J& <br /> 2. Depth of percolation tests = �z inches e�a�.» c����Y �,e��as�y i�a��ta� <br /> a�Ki«: �so iizs �soo <br /> 3. TextureSq�,..' Percolation rate -��" mpi a,.<< �� ,� 2� <br /> s���e i soo zzso s000 <br /> 4. Land slope �p % �•R���y Z� 3� � <br /> D. ROCK LAYER DIMENSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock layer: A x 0.83 = <br /> �o� gpd x 0.83 sq. ft./gpd =-Soo sq. ft. <br /> 2. Select width of rock layer (max 10' if<120 mpi max 5') _ /b ft. <br /> 3. Length of rock layer = area=width = � a<en.e� Qo�o-���a �no�e� a, � <br /> �y oa.o 0 0 0>o a/��,{ �a <br /> ►1F1� sq. ft. - �ft. _ -S� 1L. ���o6DD`�U°°p�P_^oA P.;. <br /> QQO�OQ.C'C:n.O Cn6.0.0 C � <br /> a"p0'pDQODD�DD �b::. <br /> Width �O j{ ao opDQDOOD D eDD <br /> <120mpi <10' Length.�'o � ft <br /> E. ROCK VOLUME >120mpi <5' <br /> 1. Multiply rock area by rock depth to get cubic feet of rock�oo sq. ft. x / <br /> �. =soo cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> -�'� cu. ft. =27= 10 cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons;?o cu. yd. x 1.4 <br /> ton/cu. yd. _�tons. <br /> F. ABSORPTTON WIDTH Absorption Width Sizing Table <br /> 1. Percolation rate in top 2 inches of soil is�3�mpi �d���;� Gallons RatioofAbsapuon <br /> Minutes per Inch Soil Testure per day per width to Rock <br /> Texture � (MPI) squarc fooc Laya�Yid[6 <br /> Faster than 0.] Coazx Sand 120 1.00 <br /> 0.1 to 5 Sand 1.20 1.00 <br /> 2. Select allowable soil loading rate from table; o.<<o s Fne Sand o.6o z.00 <br /> 6 m 15 Sand Loam 0.79 1.52 <br /> �7 gpd/ftz �a �, <br /> 31 to 45 Silt Loam 0.50 2.40 <br /> 46 to 60 Clay Loam 0.45 2.67 <br /> 60 to 120 Clay 0.24 5.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer s�oWa w��Zo ��ay o.zo 6.00 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; <br /> 1.20 gpd/ft2=�_ gpd/ftz= , Z . <br /> 4. Multiply adsorption width ratio by rock layer width to get <br /> required adsorption width; <br /> .SZ x /d ft = /S ft <br />