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' � MOUND DESIGN WORKSHEET <br /> (For F1ows up to I200 gpd) <br /> A.� �.�w Euimued Sewage Aow'v�Gallans pet Day(g�rd) .••.-� <br /> �S�lIilat� 7 G �d N of� 'Iype I 'Iype II 7ype III 'Jype JV . <br /> or measured — x 1.5 = — gpd. s�a►�� � <br /> 2 300 2?S 180 sas <br /> 3 450 300 2I8 � <br /> B. SEPTIC TANK LIQUID VOLUMES ' 4 6°° 3�s zs� <br /> s �so aso z9a •''"" <br /> �-��<O t 1-/b 0 D g�0I15 6 900 525 332 � <br /> 7 1060 600 370 �� <br /> 8 1200 675 408 <br /> C. SOILS(refer to site evaluation) �� �� N,mm� � �� <br /> 1. Depth to restricting layer= a� � ao inches �,ffi � � <br /> 2 Depth of percolation tests = I �" inches <br /> 3. Percolation rate 5.c.. mpi �3,�'a 1'0�0°o i','soo� <br /> 4_ Land slope � % <br /> �s i�oo a.�so <br /> ��s z000 s.000 <br /> �Q 9 sa s&c.a �:is� <br /> D. ROCK LAYER DIlv�1VSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer:A x 0.83 = <br /> �sv . gpd x 0.83 sq.ft./gpd= �aa sq. ft�►��,=�y4, <br /> 2 Select width of rock layer(10 feet or less) = I o ft. <br /> 3. Length of rock layer=area:-width= R�g� <br /> �_ ��_sq. ft._ �o ft. _ �� ft. �.,.�.,.�.ti.ti.�...�.....,.�.,.,., <br /> •r.f.J•�N•t•r•r•r•J•r•f•r•t•t•r• <br /> ti•ti•ti•Mti•ti•L•wti.��ti•ti•ti�ti•ti•ti•ti <br /> f•r•�•f•r•f•r•r•r r•f•r•r•r•r•r• idth <_10 ft <br /> 4�ti�ti•'Nti•ti•�ti.ti•tiK•ti•ti�ti�ti•tiK <br /> r•t•t K•rM•r•r•t•r•r•fY•r•rN• <br /> �•t•tiKKK.wtiK•t•Yti•1•Yti•ti•ti <br /> .1•f•t.f•�r•t•r•l N•�f•t•r•f•i/• <br /> E. ROCK VOLUME �— �'�' —� ' ._-`� <br /> 1. Muliiply rock area by rock depth to get cubic feet of rock; <br /> ��� sq.ft.x ��os ft. _ �l K cu.ft. <br /> 2 Divide cu.ft.by 27 cu.ft./cu.yd. to get cubic yards; <br /> �i� cu.ft. i 27= a 2_cu.yd. � <br /> 3. Multiply cubic yards by 1.4 to get wei t of rock in tons; <br /> �cu.yd. x 1.4 ton/cu.yd. _�tons. <br /> F. ADSORPITON WIDTH G.��4�f t.0�Y✓! .an NSdth Sian Table <br /> 1. Percalation rate in top 12 inches of soil is s'� mpi r��,h�,R,� �Q- �d <br /> �,,,�, ,�, SoilTexture �� �,"b <br /> tmp'� t�e .r.: m <br /> 2 Select allowable soil loading rate from table; Faster than 0.� oarse sana 12o i.00 <br /> ,�ts gpd/ft� o.i co� sana � izo i.00 <br /> 0.1 to� Fine Sand �•� 2-� <br /> 6 to 15 ndy Loam 0.79 152 <br /> 3. Calculate adso hon width ratio b dividin rock la er 16 to�o �.o�m o.bo 200 <br /> rP � y g Y 31 to 45 suc�m o.� �.� <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; `��O� ����' 0�4 ;o0 <br /> 61 tU 120 <br /> 1.20 gpd/ft2-:-�y � gpd/ft�= a.lo� Slower than�20 Cla - - <br /> -sal havi�so�r or mar af rm or�ey s�e aana. <br /> 4. Multiply adsorption width ratio by rock layer width to get <br /> required adsorption width; <br /> �.� x10 ft= a�.� ft `�'�., <br /> ;� <br />