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� • . MOUND DESIGN WORKSHEET <br /> , <br /> ' , . � (For Flows up to 1200 gpd) <br /> , , <br /> A. �..Ow Estimued Seaage F7ow in Gallons per Day(gpd) <br /> Estimated�_gpd N�� <br /> or measured --' x 1.5 = - gpd. B�°�n„ �'P`I �it 'Iype III Type IV <br /> 2 soo Zu �so �, <br /> 3 450 300 218 '� <br /> B. SEPTTC TANK LIQUID VOLUMES 4 �ao 3�s zs� ,��, <br /> i- i aSo � 1-l00� gallons 6 soo `su 3� Q <br /> � taso boo 3�0 �,,@,. <br /> Fu�,�,� s �zoo 6�5 aos <br /> C. SOIIS(refer to siteevaluation) �� ,� 14��.�n ��'� h,�� � ,�m <br /> of �� ���� <br /> 1. Depth to restricting layer= 1 sb -�� a0 inches B�� �,,, �,, <br /> 2. Depth of percolation tests = 1 a'� inches `�'' `�"' <br /> 3. Percolation rate / 1. O mpi 23a'4` ,'000 i',s o <br /> 4. Land slope � % ;Q 8 z'� 3 0° <br /> ova 9 See fig.C-6 (x 1S) <br /> D. ROCK LAYER DIlvIIIVSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock :' <br /> layer:A x 0.83 = , <br /> �SO gpd x 0.83 sq. ft./gpd =�aZ sq. ft-f�e��-l�4sy'� <br /> 2. Select width of rock layer(10 feet or less) _ /a ft. <br /> 3. Length of rock layer = azea=width= Rock Bed <br /> L�U sq. ft._ �ft. =12� ft. ,.,.ti.,.ti.ti.ti...��...�.,.ti...ti.ti <br /> �•t•1•t•J•r•f•!•f•t•r•f•�•r•1•1• <br /> 1.ti•\•ti•ti•ti•ti•ti•�.ti�ti.ti•ti���ti.ti.t <br /> 1.1.f.1•!•r•t.f•t t•t•t•t•J•f•r• idth 510 ft. <br /> ti•ti.ti•ti•ti•L•�•\•ti•L•t.t.L•�•ti•t•ti <br /> r•�•t•J•t•f•t•t•t t•r•I•t•!•r•r• <br /> . ti,ti���ti�ti,ti�ti�ti�ti,��ti�������ti��,ti <br /> .f.�.r.J.�.t.f.f.f.f.t.t•f�f.f��. <br /> E. ROCK VOLUME ~- �'g�' -� <br /> 1. Multiply rock azea by rock depth to get cubic feet of rock; <br /> �y,sq.ft. x l.o ft. =7►� cu.ft. <br /> 2. Divide cu. ft.by 27 cu. ft./cu. yd. to get cubic yazds; <br /> �cu.ft. -:-27=�cu. yd. � <br /> 3. Multiply cubic yazds by 1.4 to get weight of rock in tons; <br /> �cu.yd. x 1.4 ton/cu. yd. _�tons. <br /> F. ADSORI'TTON WIDTH C..L�?�i Lv�4-n'I „�, ba,rwa�,s�„ �bk <br /> 1. Percolation rate in top 12 inches of soil is mpi r��,ti�,R,� �0� a�°°� <br /> M�y(m�� SoilTexture yQ„°i,:� �,°�°. <br /> P tes ,e.erpaa� <br /> Mdeh <br /> 2. Select allowable soil loading rate from table; Faster than 0.1 0�sana 1.2o i.00 <br /> d/ft� 0.1 to� Sand 1.20 1.00 <br /> � 0.1 to� Fine Sand" �•b� 2•� <br /> 6 to 15 ndy Loam 0.79 lS2 <br /> 3. Calculate adso tion width ratio b dividin rock la er 16 ro so Loam o•� 2•� <br /> � y $ }' 31 to 45 Silt Loam 0.50 2.40 <br /> � loading rate of 1.20 gpd/ft2 by allowable soil loading rate; �to bo ctay t,oam o.4s 2.6� <br /> 61 t0120 Clay 0.24 �_00 <br /> 1.20 gPd/��- gpd/ft2 = stower tt�an t2o Cla -- - <br /> "Soil}uving�09G or more of fine or vcy fine sand <br /> 4. Multiply adsorption width ratio by rock layer width to get <br /> required adsorption width; <br /> x ft= ft <br />