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Y <br /> ' ! . <br /> Trench and Bed Worksheet <br /> 1. AVERAGE DESIGN FLOW <br /> A. Estimated 300 gpd (see figure A-1) <br /> or measured x 1.5(safety factor) = 0 gpd <br /> B, Septic tank capacity 2,000 gallons <br /> stimate ewage ows in <br /> Number of <br /> Bedrooms Class I Class II Class III Class N <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 rate 20 mpi <br /> F. SSF 2 ft2lgpd(see figure D-15) <br /> G. %Land slope 8% % <br /> D•15 Soil Characterisitcs&SSF C-1 Septic Tank Capaci in Gallons <br /> Perc Rate Soil Tecture SSF Number of Minimum Capacity with Capacity with <br /> mpi sq ft/ pd Bedrooms Capacit 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 /> 16-30 Loam �.6] D-H: Suil Characterislics and&�i)sizing <br /> facturs ISSF)for Gravelless Pipc <br /> 31 -45 Silt loam,silt 2.00 - <br /> Ex:rtt�lauin rate Bneal fee�/ <br /> 46'6� Clay loam� 2,2� lm�nulcri/tndi) Xwl lexture Kalli'n/d'a} <br /> �a.�cer than 0 1' l.tw�rse Swnd <br /> sandy clay u,<<,s h����»���, o.i� <br /> tr,amv Sand <br /> or silty clay 0]to5 Rne Sand^ O.ti <br /> b tu 15 Sen�iy l�knn 0-q2 <br /> 61 - 120*** Clay, sandy 4.20 ,b���n L��m as� <br /> 31 l0-05 Silt LcNm p.b7 <br /> or silty clay s+�+ <br /> 46toti0 CIa�L<.�mfC�iJ f1iJ <br /> �ndy Cl. <br /> � >�Z��t�x �Itv Q <br /> J�*s�er Ihan(i0'J' Cla�'< <br /> *No trench >25%of total system s';';;�'�,�;"' <br /> ""Soil with >50%fine sand particles -�.���«u,���r��,��}�,e��r���»�,� <br /> lJsesy�tNnsfcrrapiclly F�nx•ablesnls. <br /> *,r* '"ticil having 509:ix nuw-c iinc�:uid�vav line s.vid <br /> A mound must be used "�il�vilh tcx:hiKh a E�eixxntaKe d clav(cr <br /> **x* ' 1nsWllatiai�i a vaitdard inKinind s,�uaii <br /> An other or performance s stem <br /> , <br /> Page 1 of 2 <br />