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1 • <br /> , <br /> � <br /> . Trench and Bed Worksheet <br /> � 1. AVERAGE DESIGN FLOW <br /> A. Estimated 300 gpd(see figure A-1) <br /> i or measured x 1.5(safefy factor) = 0 gpd <br /> � B. Septic tank capacity 1500 gallons <br /> s ima e ewage ows in <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 /> I 7 1050 600 370 � II or II <br /> 8 1200 675 408 columns <br /> i 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 Percolation rate 20 mpi <br /> � F. SSF 2.2 ft2/gpd(see figure D-15) <br /> G. °/a Land slope 18 % <br /> � <br /> D•15 Soil Characterisitcs&SSF C•1 Se tic Tank Ca aci in Gallons <br /> Perc Rate Soil Tecture SSF Number of Minimum Capaciry with Capacity with <br /> i m i � s ff/ d Bedraoms Ca aci Garb.Dis . Dis .and Lift <br /> f <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 /> i Loamy sand 5 or 6 1500 2250 3000 <br /> I 0.1-5** Fine sand 1.67 7,8 or 9 2000 3000 4000 <br /> 6-15 Sandy loam 1.27 <br /> 16-30 Loam �,6] D-9: Sc�il Charrctcrielics and Suil sizin�; <br /> i faclors tSS�(ur Gravelless Pipc <br /> � 31 -45 Silt loam,Sllt 2.00 ,�,�,,,���,,,��� ��„�,�r�,e1� <br /> 46-60 Clay loam, 2,2� �minulcs/IndU s�,yl lcxture b,n��,id�y <br /> sand C�8 F:isl��rlhan0l' CrnrseS:md -- � <br /> Y y 01 taS Mlncllum 3md 0.2F <br /> ��$�Ih�Cla I.c�my Sand <br /> `] y 0.1 fq5 f�nc S�n[I" O.ti <br /> � ,ht� 6101$ SandyLicn» U.42 <br /> 61 -120 Clay,sandy 4.20 �e<<,�o L��m n� <br /> 31 t045 tilll I.ttim Qfi7 <br /> or silry clay 5,,, <br /> + 451i760 �-�a�t.cun,cc:�� n�a <br /> i >120•*•• ��H�v r,t. <br /> �illy CL <br /> �laver Ihan GO•,• Cl�, <br /> � *No trench>25%a of total system �����+����.v ��� <br /> Slliy Q�y <br /> **Soil with>50%fine sand particles 'Scil t�vc�anefor�va},•clitvUnmt. <br /> I U.sesystc�nstcxrapldly xr•mealNesc.ilc <br /> i '�'t*A mound must be used "�ci�hca'Inp 5U7,ur mcxc�inc s.vid•i eav flnc sand <br /> , •".Scil�vilh Im lugh a percniwhe d day fcr <br /> *"**An other or erformance s stem `°'`'�'°"�,``'""°`'°'�`""�'�«'"`'�•5`°„ <br /> � <br /> I <br /> , <br /> � <br /> � <br /> � <br /> k.�.�.��`�' ��� �- fl�w��`'� ��`.��' j}y Page 1 of 2 <br /> /� ' ,.. `j��,.e! �'.y 4:� �1� �j::�Ai�� <br /> � . GT7oq,'C.'l'. yJ•�i 6Lt' �l. �.e�.tij� G��'� Z�'R i.y} <br /> �/p� .1 :tr'f'� p� ��a+4y-�"''��Y <br /> FT �+��"�i�''J� �,�xi� ��4�Y.�.��,p .� ..1 <br /> �... t <br /> � � <br />