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i��_;.: -__� i._�..�:_ 1. � •_:�-, i i�.i.�i i i u..i U 1 �_i_i i_�I �_ �_.��i� I I..i�ai.i ._.. 1�L'.:' 11_i <br /> 1a�r._�lJ`=,l l_1 �'',l'1F-� <br /> ;� ' Mt�UND DESI�N WUIt�CSY�E�'I <br /> ' � ' _ (For F�aws up t�o I2t70 gpd) . <br /> � A. FLa�v ����,�.����. <br /> �stimaEed_��gpd (s��ages �-�ar I-3,4.5) , <br /> or meas�red —�- gpd x 15 � �-•- °� �'4� �'n �'p°01 �'A' <br /> aaarooe„ v <br /> 2 30D 1� t aD <br /> B. SE�'''I'!�T�IrT�C Y.�QU�tJ��L.4TMES s aso �ao tte � <br /> �-10 0 � gallons(se�p�tges�3 ar C�5) 6 '�3° s� m `;, <br /> � �aaa sao 37cf '�`• <br /> �. SdI�.S(1'�+�'P#0 S�t�EVAIt����l} e izao 6n �a� .w... <br /> � ������ <br /> 1. I�epth ta restricting l�;qer=�y'�-�r��- '�v.inrhes <br /> 2. Taegth of p�r�atio� t+�#�a � �.. " �nc.��s � �`�''' �•••� <br /> 3. 1�er�iatic�n rake 3.t� mpi cL�-�c L•o ar,� �i� �o i's a <br /> �IIIY <br /> 4. �,�d slope S 9'� ��.`. � � <br /> .�, -�-- <br /> D. KC�K L.AYER DIMF.'�TSIONS � <br /> t� MulHply f�ow rate by Q.83 tcs s�btain�requir,ed az�ea of rc�k <br /> Iayer: i�aity�'low x d.83 � , <br /> �- u gpd x D.B�sq. ft./gpci=�,;��q. #t. -+�D�:,y�nQ <br /> Z, S�Iect width t�f�o�k layer(1�feet ur less) - �� ft. <br /> � 3. �.�ngth af rack layer� Area+VVidth � <br /> �„o sq. ft. � t,,,1 o f t. =� ft. 'Rock�e�d <br /> t.ftir rti��r ti r <br /> . ' �.;�`r��;� ���y�y{ r�r � dth 51D fL <br /> i <br /> i • t r f� <br /> E. �ocx vo�,v�E �---�--'�,�h <br /> 1. Multiply rc�3c�rea by rt�k depth to g+et�bic feet of rock; , <br /> �sc�. �t. x�ft. =,?�,�cu.ft. <br /> 2. Divide Cu, ft,by�7�u. f�./tu.yd. to get cubic ya�ds; <br /> „o �u. ft. �Z7= 1-� cu.yd. <br /> 3. Multiply cubi�yards by 1.4 fo get wei�ht nf rCr�k in tans; <br /> �cu. yd.x 1.4 ton/cu. yd. =��_ tons. , <br /> �. ADStJnPTI�N WIp� �t....�� 1.:��vr-s <br /> X. Percalation rate in top 12 inches of svii is �,�• mpi AH�w`ptfon Wldtfi fi1�I�71tbk <br /> 2. Selet�allowable soillaadin�rate from t�bl�on page&; r����� ��� �� ��� <br /> .�,.� gPd/ft� <br /> 3. Calculate ads�r�rtion width ratio by dividing rocic layer p��o•� �� • <br /> D.1 w S Sa+d 1.�0 1,ti0 <br /> loading rate of 1.20 gpd/ft�by allowable soil loadin rate; 0,1+��•• ��+•• o.� z.no <br /> �,�2 �} � 6 to 1S S�ndp Lrnm 0.74 1.32 <br /> �.�Q arr�I i�--� ��4�,�t'�a �,,�a,.L_• 16 ro a0 Lami are 2.f10 <br /> br-" �i a�4�S ,IM� n.as �� <br /> Check this�alue vtt �xrg� E-1&. �, . ,.� <br /> 4, iViult�ply�dsorF+tian widttt raria by rack Iayer width to get �'°"K'�'"" �''y �" � <br /> »o►.. <br /> required adsa�rptios't width; <br /> ,�.�7 x 1a ft ��,.�„� ft <br /> � <br />