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' � MOUND DESIGN WORKSHfiET <br /> � � (For Flows up to 1200 gpd) <br /> A. FLOW �es.�►.�.r��++�+u►a.u«s+� <br /> Estimated�gpd "'� '�°' �'p'° �`v°`m � <br /> or measured,_,_._x 1.5 a=.Spd. <br /> Li UID VOLTJMES 4 �ao�0o m �ssa „�;, <br /> B. SEPTIC TANK Q s �� „� �+ ti <br /> '� �-�—�ono gallons s soo xts m <br /> �- i a-� . . <br /> � i I1� � � 0 <br /> C. SORS (refer to site evaluation) �� � <br /> 1. Depth to restricting layer a �� ' � inches__feet �•d <br /> �+-�-�`' �� �+r...c+r�u'w an�.�r..r�� �W <br /> 2. Depth of percolatloa tests= �� in�� <br /> 3. Tezture �-o��w� Percolation rate�'�2, p' '"'' "0 "" "� <br /> s- at i ;.� �� � � <br /> 4. Land slope % :.'"• '0°° '°°° � <br /> D. . <br /> 1. Multlply flow rate by 0.83 to obtain required area of rock layer: A x 0.83 = <br /> �gpd x 0.83 sq. ft./gpd =�3,,sq. h. <br /> 2 Select width of rocic layer(max 10' if<�20 mpi.max 5') _, /_ft. <br /> 3, Leagth of rock layer=area+width= <br /> ' �_,sq. ft+ �_ft.=_� � <br /> Width, �=ft <br /> � <120mpi <10' un � <br /> � >120mpi c5' <br /> E. ROCK VOLLTMfi <br /> .1. Multiply rock nren by rock depth to get cubic feet of rock;�sq. h x •o�' <br /> n <br /> ft.���,,a,cu.ft. <br /> 2. Divide cu. ft.by 27 cu.ft./cu.yd. to get cubic yards; <br /> �r�;;�,cu.ft. +27��_cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rocic in tons;�.,cu. yd. x 1.4 <br /> ton/cu.yd. _�tons. <br /> F. ABSORPT'ION WIDTH na.�w�eeasm�ae�. <br /> 1. Percolatiost zate ir►top 12 inches of soil is ►s.� mpi �a��" �n,�. �� �� <br /> Texture �u4� u�ra�� o��n �•� u,�w <br /> ww...a� ceu+.:..a �20 �.00 <br /> 0.1 M S l�sd 1.20 1.00 <br /> .2, Select allowable soil loadiag rate hom table; i»is s.�w. a� �s� <br /> "-,� 81�d�� � �i»� t�°r°,e�. o:� i.000 <br /> �wa c��e.. o�s x.a� <br /> 3. Calculate adsorpt�on width ratio by dividing rock layer �°""p1°'��20 � � `:O <br /> loading rate of 1.20 gpd/ft2;by allowable soil loading rate; <br /> i.20::gpd/f�.+. �� gpd/�a . a.=, <br /> 4. � Multiply adsozptio�n width ratto by zock layer width to get � <br /> zequired adsoirptlon width; <br /> ��x�_ft= a�,.� h <br />