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� • MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) <br /> 'A. FI-�W ' Estimaicd Scwage F�ows in Gallcx�s pa day <br /> Estimated '1 ��� gpd (see pages D-7 or I-3,4,5) f ��� �g�� <br /> or measured gpd x 1.5 = ���s Type I Typc 11 Typc IIf �a <br /> B. SEPTIC TANK LIQUID VOLIJti1ES 3 4so° souo igs° � <br /> 4 600 375 256 <br /> )- I�<!� � 1-Ico J gallons (see pages C-3 or C-5) s �so 4so z� ""o' <br /> 6 900 525 332 Trr=�• <br /> 7 1050 600 370 II Q <br /> 8 1200 675 408 cdumn <br /> C. SOILS (refer to site evaluation) <br /> 1. Depth to r2strictino ?ayer = �.`�" rl inciles S`'`"T'"��.'"""x`^K'",.^, <br /> ,� 1 r Vum6�o( ttinimum Liquid Liqa�1 upriry v�in <br /> 2. Depth oF percolation tests = 1 T inc:�es ���. � cw.�,�Y e..b���a���.� <br /> 3. Percolation rate �S . I mpi zaku �� ,�u <br /> 4. Land slo e ' py 3�4 �� 1� <br /> P '� /0 s or 6 IS(A 2250 <br /> 7,8 or 9 7�(p 3(AO <br /> over g _� <br /> D. ROCK LAYER DI�IE�SIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer: Daily Flow x 0.83 = � � <br /> �j D gpd x 0.83 sq. ft./gpd = ��� sq. ft.-� � �=_ � �`�``� <br /> 2. Select width of rock layer (10 feet or less) = J c: ft. <br /> 3. Length of rock layer = Area� Width = <br /> �_sq. ft. i l o ft. _ �� ft. Rock Bed <br /> . t•r•t•f•r•f•r.f.f:��f�f.r.r:f <br /> ti••.•'.•1•ti•ti•1•ti••.••. ti•1•ti• <br /> � - . tifl�tiftijtifti?��trti�tif~:tifti�ti�tif idth SIOft <br /> l•l•t•t•t•l.l.t f•t•f•t.t•f•l <br /> E. ROCK VOLUME ;.~ ., ~ ~ ~ ~ � •• ••;:•: 1 <br /> '•l�:•l.r•t t l��~J•f• �~l�f <br /> �.• Length --� <br /> 1. Multiply rock area by rock dep th to get cubic feet of rock; <br /> ��su sq. ft. x!.��ft. _ � I�cu. ft. <br /> 2. . Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> ��� cu. ft. i 27= a� cu. yd. � <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br /> �-� cu. yd. x 1.4 ton/cu. yd. _ �� tons. <br /> F. ADSORPTION WIDTH L'�-�-`� �-��r%; <br /> 1. Percolation rate in top 12 inches of soil is S�. I mpi Absorption Width Sizing Table <br /> 2. Select allowable soil loadin�rate from table on page E-• ''"`°'a"°"�` ce��«,: Ra��oor <br /> � in Minutes per Soi1 Texture per day per Absorp�ion wid[h <br /> ��� �d�f� Inch(MPq squnre Cooc to R1Y�dth Yc <br /> 3. Calculate adsorption width ratio by,�ividing rock layer Facterthan0.1• c�sy,a ___ ___ <br /> o.�ws se„a i.zo i.00 <br /> loading rate of 1.20 gpd/ft�by allowable soil loading rate; o.��s•� Fme Sand•' o.�o z.�o <br /> 6 to 15 Sandy Loam 0.79 I.52 <br /> 1.20 gpd/ft�i , � gpd/ft2= � , �� 16to30 ��, o.�o z.� <br /> 31 to 45 Silt Loam 0.50 2.40 <br /> Check this value on page E-16. ���o c,a,,�, o.os 2.�� <br /> 60 b 120 Clay 0.24 S.W <br /> 4. Multiply adsorption width ratio by rock layer width to get s�o�;�,�, c�=r — —_ <br /> required adsorption width; <br /> .;,.� x /J ft =a �,.� ft <br /> � <br /> I <br />