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<br /> MOUIVD DESiG1Y WORKSHEET
<br /> (For Flows up to 1200 gpd)
<br /> A. FLOW D-7 .
<br /> mn..,co strroc nars n�rx�f ra o..
<br /> Estimated _ �G� gpd (see pages D-7 or 1-3,4,5) ,,,,.�„ ,,,� „„�,,,�,K�.
<br /> or measured gpd• °`°"°°� ` � II =
<br /> � ! �00 !tS ��0 iOtt
<br /> I 1!O I00 =1� el
<br /> � �00 77! !% •ww
<br /> B. SEPTIC TANK LIQUID VOLLTMES : �° �n � �'�I.
<br /> . ,� .� �,� �
<br /> �
<br /> ,�'--/c.:'�-� p gallons (see pages C-3 or C-5) ' "°° "' '°' ""'""
<br /> C-3
<br /> C. SOILS (refer to site evaluation) sEP,�� T.NK ��.•��nE:, iN a�uoes
<br /> �/ ua�o�...e�.
<br /> r�a w�w wrw wr.w
<br /> 1. Depth to restricting layer = inches .�,. ��...�. o�..o,..
<br /> 2. Depth of percolation tests = /z— inches .a,... ... ��..
<br /> 3. Percolation rate mpi '°"' "" ""
<br /> ��. ,... ,.�e
<br /> 4. Land slope % ►.��• ,•,• �•••
<br /> D. ROCK LAYER DIMENSIONS
<br /> 1. Multiply flow rate by 0.83 to obtain required area of rock
<br /> layer: A x 0.83 =
<br /> � gpd x 0.83 sq. ft./gpd =5�� sq. ft.
<br /> 2. Select width of rock layer (10 feet or less) _�ft.
<br /> 3. Length of rock layer= area+width=
<br /> ° �} Rock Bed I
<br /> �', �p sq. ft.f �� ft. =�•a• •t 1• •f•t r•I 1•r•r •1•♦
<br /> �.;.t. �.ti•�•i•ti•ti.tiFti•i ti•ti• ,
<br /> � •t r 1��•t•I•t•l•! r• •r•�'r•
<br /> L i. ti ti.ti�.ti•�•�•ti•��.ti; idth 51P
<br /> 3.'r.��3}r•}•r r•r•r•r•i.r•r
<br /> ti.ti•+•ti•ti•ti•ti•+•ti•+•ti•��ti•ti•�•
<br /> .�.f.r.r.r.i.r.�.r.r•r•i•�•r•r
<br /> E. ROCK VOLUME �--- I.ength
<br /> 1. NiulHply rock area by rock depth to get cubic feet of rock;
<br /> So
<br /> So� sq. ft. x / ft. �� cu. ft.
<br /> 2. Divide cu. ft. b y 27 cu. ft./cu.yd. to get cubic yazds;
<br /> �O cu. ft. +27=��cu. yd.
<br /> 3. Mulri ly cubic yards by 1.4 to get weight of rock in tons;
<br /> � /��cu. yd. x 1.4 ton/cu. yd. _��tons.
<br /> F. ADSORPTTON WIDTH
<br /> 1. Percolation rate in top 12 inches of soil is�mpi E-16
<br /> 2. Select allowable soil loadin g rate from table on page E-16� �+�+�+��b�►mawuu■ou�nu�e=
<br /> _�L &Pd�f� � ..�.�.r...�
<br /> :.w, ...�. .�,... .�... �."�..'"-: i
<br /> 3. Calculate adsorption width ratio by dividing rock layer ,.,. , ,.N ..M �.» ...
<br /> loading rate of 1.20 �pd/ft2 by allowable soil loading rate; � '" "' ,.,,�
<br /> .... .... �.':-
<br /> 1.2� gpd/ft21 �&Pd�ft2= Z. o� :: .,. .... ::;: �:; ...,
<br /> �1�.�i0 �.�� �.N �.N �.0�
<br /> Check this value on page E-16.
<br /> 4. Multiply adsorption width ratio by rock layer width to get
<br /> required adsorption width; � �
<br /> �O x Z ft =•�� ft
<br /> ._ _ �
<br /> �, :�,��,,,�.;�..
<br /> �_ :
<br /> , ;�,�:, .
<br />
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