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E-1:
<br /> � h10UND DESIG�J WORKSHEET
<br /> (For Flocvs up to 1200 gpd)
<br /> �1;. FLO�1/ �'�
<br /> �,W.�,�.���� ��.`.. .� :..
<br /> Estir.:ated 0O gpd (see pages D-7 or I-3, 4, �) � ,,,,,„�, � ,.,� v ,,,,aK�,
<br /> or rneasured gpd. °"'°°`�' ' � ' = � _
<br /> I X.O II� I i p I {O�
<br /> 7 so ]00 i���
<br /> • �00 777 �.{
<br /> ! �70 •'A 2'f� j t��
<br /> B. SEPTTC TANK LIQUID VOLUMES • •� �� I ,�_ „
<br /> . i�lO .00 3�0 I =
<br /> �� /Do p gallons (see pages C-3 or C-5) ' "°° "' � G�--
<br /> C-3
<br /> SEGTIC T��.K CAI,►GT1E5, IN WLIOMS
<br /> C. SOILS (refer to site evaluation)
<br /> 1. Depth to restricting layer = ~ � inches . �" �• -"�"°��'°�
<br /> .� ��...a.. o,,.o..�
<br /> 2. Depth of percolation tests = /� inches ,a,�„ ,,, ,,,,
<br /> 3. Percolation rate ��-� mpi '°"' �•�� ���•
<br /> ��. ,�.. ,���
<br /> 4. Landslope �- �o % ,..a. ,,,. ,,.. �
<br /> D. ROCK LAYER DIMENSIONS
<br /> 1. �fultiply flow rate by 0.83 to obtain required area of rock
<br /> layer: A x 0.83 = �p o�, = 5y 7
<br /> 40 gpd x 0.83 sq. ft./gpd =� sq. ft.�'
<br /> 2. Select width of rock layer (10 feet or less) _ � ft.
<br /> 3. Length of rock layer = area + width =
<br /> _ ��`/ 7 sq. ft. y �0 ft. _ ,�� ft. . ._ �,-, . �,-... Rock Bed
<br /> •`•f•`•�•f•�•r•`•/•f•f•y'•f•J•J• I
<br /> .. � 1.t.ti.�.ti.t.t.1.�.�.1.t•t.�.t.�
<br /> ti�.J.l.r.f•f.1•r.I•J•J.I•l•f•/• c.
<br /> .�.�.�•�.�.�•ti �•ti.ti.ti•�•�.�..,�;idt}i 510
<br /> .�.�.r.�.�.�.f.�.�.i..•.•�•. •r� I
<br /> ��..�././,I.f./.l.j l•J�/:l�r•/r
<br /> 1
<br /> E. ROCK VOLUME ►--- Lengch --�
<br /> 1. Multiply rock area by rock depth to get cubic feet of rock;O �� �
<br /> ,�_� sq. ft. x�ft. _�l7 cu. ft. 02 S
<br /> 2. Divide cu. ft. by 27 cu. ft./cu. d. to get cubic yards; �O ,� ,Q o�� �
<br /> ,�cu. f t. i 27 = `�d ,cu. yd. �`�- o o�.
<br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; �^�
<br /> 20 cu. yd. x 1.4 ton/cu. yd. = 2� tons. �
<br /> S�-� / lo ��� I-y = � sy T� ,�
<br /> F. ADSORPTION WIDTH � S� °`O4"""`"
<br /> 1. Percolation rate in top 12 inches of soil is � Y•�$npi E-16
<br /> 2. Select allowable soil loading rate from table on page E-16; �-���m��Wu��•°�
<br /> �_ gpd/ft2 �-- �----^� �
<br /> ,.. ,._.�..�
<br /> 3. Calculate adsorption width ratio by dividing rock layer � � M� � i ��.,. �
<br /> .,. . ,.. ... �..
<br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; ' �" "' '" '" ' "'
<br /> ,. ... ... �.. �.. �.�.
<br /> .� .�1 t.M /�• ;N I �.�•
<br /> 1.20 gpd/ft2 ��BPd�ft2 = y� . ... ... ..,t ,> >.,
<br /> � ., .,,. .,. .a. .,, � ...
<br /> Check this value on page E-16.
<br /> 4. Multiply adsorption width ratio by rock layer width to get
<br /> required adsorpdon width;
<br /> � X �,ft = zH ft
<br />
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