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� <br /> Trench and Bed Worksheet <br /> , 1. AVERAGE DESIGN FLOW <br /> A. Estimated 600 gpd (see figure A-1) <br /> � or measured x 1.5(safety factor) = 0 gpd <br /> B. Septic tank capacity 2000 gallons <br /> s ima e ewage ows m <br /> � Number of <br /> Bedrooms Class I Class II Class III Class IV <br /> 2 300 225 180 60%of <br /> � 3 450 300 218 the <br /> 4 600 375 256 values <br /> 5 750 450 294 in the <br /> � 6 900 525 332 Class I, <br /> 7 1050 600 370 II or II <br /> 8 1200 675 408 columns <br /> , 2. SOILS(Site evaluation data) <br /> C. Depth to restricting layer= �feet <br /> � D. Maximum depth of s stem Item C-3 ft= 3 feet <br /> E. Texture Loam/Cla Loam Percolation ra e 10 mpi <br /> F. SSF 2.2 ft2/gpd(see figure D-15) <br /> G. %Land slope 12 % <br /> � D-15 Soil Characterisitcs&SSF C•1 Septic T nk Capaci in Gallons <br /> Perc Rate Soil Tecture SSF Number of Minimum Capacity with Capacity with <br /> , mpi sq ft/ d Bedrooms Capaci Garb. Disp. Disp.and Lift <br /> <0.1 * Coarse sand 0.83 2 or less 750 1125 1500 <br /> 0.1-5 Medium sand 0.83 3 or 4 1000 1500 2000 <br /> � Loamy sand 5 or 6 1500 2250 3000 <br /> 0.1-5** Fine sand 1.67 7,8 or 9 2000 3000 4000 <br /> 6- 15 Sandy loam 1.27 <br /> �6-3� Loam 1,67 D-4: Soi)Characteristic+and Soil}�z�nx <br /> ' F clors($SF)fur Gravelle+c Pipe <br /> 31 -45 Silt loam,silt 2.00 - -- --- — -- <br /> �xhz� .„irn rate hneel le�l <br /> 46-60 Clay loam, 2.2p -�,,,�,�,.�,,���,, u����•����„ �;�n�,,,da,. <br /> sand C�8 � �r•� than 0 7'T �iwrse 4�nd j <br /> Y Y � 1 tn 5 ' �1ocUum 4ttid {---p 2t,— <br /> � Of SI�h�C�8v Lctinrv tiand <br /> `J J l 1 tc�5 Rnc Sand" 1l A <br /> 61 - 120**' Cla ,sand 4.20 � '<<!;,, `"""'` '"°„ ( °"` <br /> Y Y �[„�„ n;n <br /> 3 In45 S�It Loain 1167 <br /> or silty clay �,,, <br /> � a i�,r� na�t.�„�„�ci� n�a <br /> >120+:+. y�itiy�r9i. � <br /> ��x,�E in�n�r,• a�, � <br /> 'No trench>25%of total system � ��������a�� <br /> Slllv Qay <br /> ---- -----1---== -- .____ <br /> ' **Soil with>50%f n@$and Pa�IC�@$ 'tiiil tcvrc�i>e fa��va}�,e ln.itmmt � <br /> xx* Use s 'c�iu fcx i.�Frdlv F��ti�nn�t�le ci�ls. <br /> A mound must be used ��k.�n.j ���so'.'��x nuxc iinc k�nd��a��inc s.�nd. <br /> .`•�cil iti th tcx,figh a�xrcmtaKe K clat'fcr <br /> *"*'An other or performance s stem 11,5���, �+��,�Y�������dard ingnxu�d svstan. <br /> ' <br /> � <br /> � <br /> Page 1 of 2 <br /> � <br />