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' MOUND DESIGN WORKSHEET
<br /> ' '� (Foz Flows up to 1200 gpd)
<br /> E�tim+eed ssw.t.FloM,In c,.11«u per a
<br /> A. FLOW r,�,e� Typ,i �yp,o �m �'
<br /> fistimated �.�_SPd °`
<br /> or measured=_x 1.5 =--- gpd.
<br /> � � � �� �
<br /> B. SEPTIC TANK LIQUID VOLUMES a �� � n �
<br /> I-��S� � 1-/noc� gallons • � � i� as ,� �
<br /> I � �
<br /> C. SOIIS (refer to site evaluatie1n) ���y,z�` ���es =feet �,� ,�,�,,�,�,,,,�„ry.,,, .`�'�
<br /> �. Depth to restricting lay �.+-�-;}1 ,, � �,�,,, �,,,,�,,, N��
<br /> 2. Depth of percolation tests� � `� '���� ��� ;,�
<br /> o - m 1 'i:ir io70oo i'�o�o �000
<br /> 3. Textwce �--np�^'� Percolation ra .1-2 p� �
<br /> ,'�w. ��o�oo w�oo .00c
<br /> 4, Land slope � %
<br /> D. R K LA .D I
<br /> 1, Multiply flow rate by 0.83 to obtain zequiz'ed area of rock layer. A x 0.83 =
<br /> ��_gpd x 0.83 sq. ft./gpd =2�_sq. �.
<br /> 2. Select width of rock layer (max �,0' if <120 mpi max 5') = /__a____ft. `» . ,F
<br /> 3. I.er►gth of rock layer� area+widtk� _ „�. . .,�'.�
<br /> �
<br /> • r �_sq. ft. + /� ft. _.�_ft. a, r `' �,�,- ,
<br /> �dth /p ft �
<br /> � <120mpi <10' �nS�-�--�t
<br /> >120mpi <5'
<br /> E. RrJCK VOLLTME ��►� sq. ft x i,�s
<br /> 1., Multiply rock area by zock depth to get cubic feet of rock;
<br /> ft. =?.�,cu. ft.
<br /> 2 D��de �u, ft, by 2��u, ft./ru, yd. to get rubic yards;
<br /> ,2y cu. ft. +27 =..�_cu. yd.
<br /> 3. Multiply cubic yards by 1.� to g�et weigh to�ock in tons; �cu. yd. x 1.4
<br /> ton/cu y �-
<br /> F. ABSORP'tION WIDTH AD�otpdon VYIdtL SIs1�'I1E1•
<br /> ar�� w�oan�
<br /> 1. Percolation rate in top 12 inches of soil is /o,9 mpi ���,� �„T��„ �� �a
<br /> Texture ��-fl`� �.o A-r✓�
<br /> r.,�a,.,o,i ca.�+.a.ea iso i.o
<br /> i�o i.o
<br /> 0.1 a S Fla S+sd 0.60 tC
<br /> .2, Select allowable soil loading rate from table; ,,,�s s.�er i«�, o� i�
<br /> s�-�-- SP d/£t� � ii p�s si�� oso z�
<br /> nb b 60 p+�Lam QA3 2.!
<br /> . Calculate adso tion width ratio by dividing rock layer �'�'""120 `" � 6:`
<br /> 3 rP
<br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate;
<br /> 1.ZO:gp:d/ft�+.c�s 8Pd/�_ � � .
<br /> 9�. � Multlply adso�rption width z�atio by zock layer width to get
<br /> required adsorption width;��X /-� ^��
<br />
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