Laserfiche WebLink
� , , , ..� � ,__ .. E 19 <br /> � <br /> ' . ' MOUND DESIGN WORKSHEET <br /> � (For Flows up to 1200 gpd) � <br /> A. FLOW . � D-7 <br /> Estimated �o gpd (see pages D-7 or I-3,4,5) �+�►����� <br /> w r a ,.R a�sao�c <br /> or measured gpd. �» � n � s <br /> ! �00 b/ 1�0- �0{ <br /> � 100 �00 tl� w� <br /> B. SEPTIC TANK L•IQ�CJID VOLUMES : ,� „; � '�.; <br /> � �� .� „� <br /> � —�o o c� gallons (see pages C-3 or C-5) • �� � � �.-• <br /> C-3 <br /> C. SOILS (refer to site evaluation) .. IC ANK C MCIl1l�IN OAIIOM� <br /> 1. Qepth to restricting layer� �� -�� a c�" inches �a � � <br /> �1OOIM 11011�W�p1� NMO�K <br /> 2. Depth of percolaHon tests =__� inches ,a�,,, ,�, ,�„ <br /> 3. Percoladon rate i � . �z mpi �«�� �«: +..� <br /> 4. Land slope ) O 9'0 '°"' "" "" <br /> f.�a• „n ».� <br /> D. ROCK LAYER DIMINSIONS _ <br /> 1. Multiply flow rate by 0.83 to obtain required azea of rock <br /> layer: A x 0.83 = � <br /> �_gpd x 0.83 sq. ft./gpd = yC��,sq. ft.-+ ro'ti�, s'�+� <br /> 2. Select width of rock layer(10 feet or less) _ / v ft. <br /> 3. Length of rock layer= area+width = • <br /> _SLt'7 sq. ft. + � o ft. _��ft. Rock Bed <br /> r.r r. r f• . .�r.f. �i <br /> {.�ti•�t.�• .ti� .;.ti•ti•ti.i.�. <br /> r•f•t•I•r•J r• •f•t I•t•r J <br /> . . y�S���1�t�ti� ����ti�1 t� �� d�}I ����. <br /> f.r.r.r•r•�•f•S r•r•}�i.rY}.f <br /> y.�.ti.ti.ti.ti. .ti.�•ti•ti• ti•ti•� <br /> .f.j.j•rK•r�r.l�/.htrf•1 t•} <br /> E. ROCK VOLUME �-- Length <br /> 1. Muldply rock area by rock depth to get cubic feet of rock; <br /> S�sq. ft. x/;U�ft. = s� cu. ft. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to get cubic yards; <br /> S7y cu. ft. +27=�_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,��mpi E-16 <br /> 2. Select allowable soil loading rate from table on page E-16� r+M►M+�aa+wma�asaiw�reww� <br /> ��-- gPd�f� �,.� �..w..,.... <br /> 3. Calculate adsorption width ratio by dividing rock layer �"`"" """ ''"" """ `"'+`"""' <br /> :':,: ':L_ ;� �.„ t:N <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; �. .,. » ... .... ,.,. <br /> �1 .1� �.N �.N �.M �.M <br /> 1.20 gpd/ft2+ .7�i gpd/ft2= l. _��, � :;.: ::" :•� :::: �» <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 /> J•�'ax_�ft� is• � ft <br />