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' � MOUND DESIGN WORKSHEET <br /> . (For Flows up to 1200 gpd) <br /> A. �.�W ;)��Q Estimated Sewage Elow in Gallons per Day(gpd) <br /> Estimated ��=gpd x��« <br /> or measured x 1.5 = -- gpd. B�°�� �I ry�It Type III �►y�rv <br /> 2 300 Z7S 180 � <br /> B. SEPTTC TANK LIQUID VOLUMES a 6 0 3°s° is'6 �� <br /> s �so aso z9a ;� <br /> �-���!� � 1 -IOBc� g�0I1S 6 900 525 332 � <br /> • 7 1�50 600 370 �� <br /> $ 1200 675 408 <br /> C. SOILS (refer to site evaluation) „ , h�� ,,,,� �� <br /> 1. Depth to restricting layer= a�S �0 3o inches �� �, �, ��' <br /> 2. Depth of permlation tes#s = _ 1 a � inches `""�'' `""m`' <br /> 3. Percolation rate ��g m i 2 a� �so �.�,s <br /> P s ora �.000 i.soo <br /> 4. Land slope y % .s,Q g � ��" a <br /> •'.6 wv 9 See fig.C-6 (x iS) <br /> D. ROCK LAYER DIIviIIVSIONS , <br /> 1. Multiply flow rate by 0.83 to obtain required azea of rock <br /> layer:A x 0.83 = ?����7�Q, <br /> 4�v�gpd x 0.83 sq. ft./gpd =�sq. f t.fi lo°�o=�`�`r" <br /> 2. Select width of rock layer(10 feet or less) _ /0 ft.' <br /> 3. Length of rock layer =area i width = Rock Bed <br /> �sq. ft.-�- / 0 ft. = E� ft. �.,.�.ti.,.�.,.�...�.,.ti•,.�.�.,ti <br /> ��� / 7 f•f•f•f•,•f•f•,•r•�•f•+•r'+•f•f• <br /> ti•ti•ti•ti•ti•t•�•ti�Mti.ti•t.ti•ti•ti•ti•ti <br /> I•1•1•l•t•t•t•t•j�f��•f•1•t•r•�• <br /> ti•ti•ti.ti•ti.ti.ti•ti•ti ti.ti.ti.t.ti.ti.ti.ti idth <_10 ft. <br /> 1•t•1•1•f•f•r•/•t•t•f•t•f•1•f•I. <br /> tiftiltittil•f ftttiftitlttit•l•tftiflfti�ti . <br /> E. ROCK VOLUME �- �'g�' -� <br /> 1. Muldply rock azea by rock depth to get cubic feet of rock; <br /> `?7��-sq.ft.x l,�S ft. _�cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> 2� � �. �. i 2�_��u. ya. L 9 <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; <br /> �cu. yd.x I.4 ton/cu. yd. _�tons. y�f <br /> F. ADSORI'TION WIDTH ��-a`�' �-����'� ,� aa,w,a�,s;m, Table <br /> 1. Percolation rate in top 12 inches of soil is�mpi �� �d <br /> P�colaaon Raee �a,y ,�� <br /> !�4iau m�inch Soil Texture �,y„R eti,,, <br /> (ee ab.a.snm <br /> 2. Select allowable soil loading rate from table; Faster than 0.1 oarse Sand lzo. i.00 <br /> ,� gpd/ft� O.lto� Sand 120 1.00 <br /> .. 0.1 to�• Fne Sand" 0.60 2.00 <br /> 6 to 1� ndy Loam 0.79 1 S2 <br /> 3: Calculate adso tion width ratio by dividin rock layer tb co 3o t_o� o.bo 2.00 <br /> � g 31 to 4� Silt Loam OSO 2.40 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; �to�o cla [.oa�, o.4s 2.6� <br /> 1.20�d/ft2i .wS gpd/ft�= a.l�rl Slowerthan120 Cllav 0.24 5.00 <br /> "Soil having 509G or more of Gne or very fu+e su+d <br /> 4. Multiply adsorption width ratio by rock layer�vidth to get <br /> required adsorption width; <br /> �x�ft=a�.� ft <br />