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� � MOUND DESIGN WORKSHEET
<br /> (For Flows up to IZ00 gpd)
<br /> A. FLOW ���a s�.na�FloM b c.u«,.���y�
<br /> Estimated �o o gpd N�++�
<br /> or measured - x 1.5 = - gpd. a�a►� ryP`� �'P`u �y�u� �rv
<br /> � _ 2 soo us �ao �.
<br /> > > 4S0 700 218 •r
<br /> B. SEPTIC T�1NK I.IQUID VOLIJMES � + boo 3�s us .�
<br /> s �so .so zv+ �
<br /> a - � o 0 o gallons s Qoo su »� �-
<br /> � ia�w 600 3�0 �,�.
<br /> Q 1200 675 �Od
<br /> C. SOIIS (refer to site evaluation) ►.�. ►�
<br /> ,� .� ,, , x�eQ ,.�r.. �.,.r.
<br /> 1. DePth to restricting layet= 14s,�aa, i a� inches B�. �,,,,,, �,
<br /> 2. Depth of percolation tests = ► a inches `'"° `'""'
<br /> 3. Percolation rate ��•8 mpi Ii«:" ,'.oSOoo i'.`sosso ,
<br /> 4. Lutd slope 1 �0 3 % ��; �'� ,�
<br /> ��s sa.R�.c-� c��s�
<br /> D. ROCK LAYER DIIv�1SIONS
<br /> 1. Multiply flow rate by 0.83 to obtain required area of rock
<br /> layer:A x 0.83 =
<br /> 00 . gpd x 0.83 sq. R./gpd =�� sq. ft.+����=s4���
<br /> 2. Select width of rock layer(10 feet or less) _ �v ft.
<br /> 3. Length of rock layer = area+width = R�g�
<br /> s`-1 '� sq. Et. -t- -/U ft. = s�� Et. ,.,•,,•,ti•ti•� ti.,.,•,•,•�.�.�
<br /> f•r f.f•S��I}�t Mt.I.t l 1•
<br /> �.ti•��1•1•1 ti•1•�{1•1•tiM•�.�.�
<br /> .r.r.r r•r•r r•r•�•r• r.r•:•r•i• �dth 5]0 ft.
<br /> +•ti.�•�ti•ti•{-�•ti•ti.�tih �•ti•�
<br /> r•f•t•3•r•r•�•r•r�•r.r.S?f.r.r.
<br /> +•�•�•��•�•ti•�•;•�•ti.ti.�.�•�.�.�
<br /> .f.�...f.�.�.�. r.�.�.�.f.f.�.
<br /> E. ROCK VOLUME '-- �"�' -�
<br /> 1. Multiply rock area by rock depth to get cubic feet of rock;
<br /> �_sq.ft. x .� - ft. = s�� cu. ft.
<br /> 2. Divide cu. ft.by 27 cu. ft:/cu. yd. to get cubic yards; � i
<br /> ��„cu.ft. +27=�a L cu. yd. '
<br /> 3. Multiply.cutiic yards by 1.4 to get weight of rock in tons;
<br /> �cu.yd.x 1.4 ton/cu. yd. _� tons.
<br /> F. ADSORP'IION WIDTH L�A��{ �0�4� Ab o�Wfdth5l�+ Lbk
<br /> 1. Percolation rate in top 12 inches of soil is��B mpi r�,r,,,tla„w,. �°� A�-�'
<br /> �„1�,,,,,���, Soil Texture r,r "�,,`:
<br /> �.. .:�.,
<br /> 2. Select allowable soil loading rate from table; Faster than 0.1 oarse Sand 1.20 l.00
<br /> .u.� gpd/ft� 0.1 to5 Sand 1.20 1.00
<br /> 0.1 to 5 F1ne Sand" �.b� Z•D�
<br /> 6 to 15 ndy Loam �•79 132
<br /> 3. Calculate adso rion width ratio b dividin rock la er tb ro 3o t,oam 6.60 2.00
<br /> rP Y g Y 31 to 45 sttc t.�m o5o z.ao
<br /> loading rate of 1.20 gpd/ft2 by allowable soilloading rate; �so� �.o�, 4 2.67
<br /> 1.20 gpd/ft2�- , L � gpd/ft�= a.to'1 Siowert�ian 120 � _ �.00
<br /> �sau l�.�sox a m��t t�,+�a�ay r�,�.�,d
<br /> 4. Multiply adsorption width ratio by rock layer width to get
<br /> required adsorption width;
<br /> �-Lx�ft= a�. ft
<br />
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