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• . �•-1y <br /> � MOUND DESIGN W0�2KSHEET � � ' <br /> , _ � - <br /> � (For Flows up to I200 gpd) ' � <br /> A. FLOW � D-7 <br /> � Estimated y.S 0 gpd (see pages D-7 or I-3,4,5) a"�'m'�n°��°��� <br /> , MNBLN TrK K 123�nEr�C[ <br /> or measured gpd. �� —� n � � <br /> _ � � ,.� .o,� <br /> . � ,� � :�. ., <br /> � aoo an zx wwn <br /> B. SEPTIC T1�NK L�QtJTD VOLLJMES : ;o ;; � '�; <br /> , �� .� „� <br /> �. —�o 0 o gallons (see pages C-3 or C-5) � �� �n •« � <br /> C-3 <br /> C. SOILS (refer to site evaluation) BEPTIC TANK CAtAC117lS, IH OAlLON6 <br /> 1. Depth to restricting layer = �.� � inches ; "°�"°°"`°'" <br /> «...��. �, ,�,�..o. <br /> �m�oaw ua�o eu�crtr oi�►oea <br /> 2. Depth of percolaHon tests = I � inches ,a,,,, ,�. ,,,, <br /> 3. Percolation rate L� ,�.._ mpi Ll�.��:o_ 1`��-r r�tr�r: �.��� �>.�.,_ �o.. �•a ,r•. <br /> /O 1f) L�111_t �(?1L`_� �p1� /��• fl10 <br /> 4. Land slope � ' •� <br /> �.��. .... ...� <br /> D. ROCK LAYER DIMINSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock <br /> layer: A x 0.83 = � <br /> � ��:"u gpd x 0.83 sq. ft./gpd =;��sq. ft.-t tu"�o =- y�� <br /> 2. Select width of rock layer (10 feet or less) _ � o ft. <br /> 3. Length of rock layer= area+width= � <br /> �-1 I t� sq. ft.+ 1 L� ft. _ �-�I ft. Rock Bed <br /> t•t•t•t.f•l•t•f.r�l•l•l•t•/•1 <br /> . ti•ti•'�•1�•ti•'\•ti•ti•ti•ti•1.•�•ti•ti•1• <br /> 1•t•t•r'•t•t•f•1•t•l•1•f•.'•r•f <br /> -- ti•ti•ti.ti•ti•-..ti•ti.-.•ti•ti•ti•ti•ti•ti• �dth S70 ft. <br /> � �J�1•l•t•1•1•l.!•t.r••f•1•t.l•f <br /> •�•~•'••~•~•~•~•~�~•~•~��•�•�• 1 <br /> •r•r•r.f-f•r•r•r•..r•I•l•t•t•J <br /> E. ROCK VOLUME �---- L�+gc:, <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> y 1 D sq. ft. x .f U� ft. = 4�n. cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> ��y�cu. f t. 127=��cu. yd. <br /> 3. Multiply 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 LI,� mpi E-16 <br /> 2. Select allowable soil loading rate from table on page E-16; •�•«��•e•�-��•�•a•a.•��• <br /> .��, gpd/ft2 �� � <br /> �� <br /> 3. Calculate adsorption width ratio by dividing rock layer �"�" "'"" """ '""' `"'~`"""' <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; °�'' ' '�� ���` ��a '." <br /> . .,� o.,. ,... ,.�, ,.., <br /> i�":-�n"— -o.�o o.�� �.�. r.00 <br /> s+ ..� o.w e.w a.oa �..e <br /> 1.20 gpd/ft2+ .�gpd/ft2= J. S �. :' ::: a:=: �:;: ::: ::� <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 /> . /. S�.x �c-� ft = �S,-� ft <br />