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MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) <br /> A. FLOW �•das�•e•Fl�,u►o.u��a <br /> Estimated �_�8Pd r� �.i �wn �m �' <br /> or measured__x 1�_—.--^�pd. <br /> UID VOLUMES 4 e o m �� � <br /> B. SEPTIC T�iNK LIQ a � �s m '° <br /> , a- �o o c� gallons . � '�° <br /> . I ' � i� ��is c° � <br /> C. SOILS (refer to site evaluadon) � <br /> 1. Depth to restricting layer��_i�nches,=_feet �� ,,,�...�w •+�, "''"•" <br /> 2. Depth of percolation tests= � a y inches "'-- �"'�' �'"'••'''"� '"'°'"" <br /> �-�-� L��w� Percolation rate,�..�?_ p' '"" "° �"' �� <br /> 3. Texture o. m 1 ;»w �� 'y�'0°o � <br /> 4. Land slope 3�7Q��o '�'�'S � t`U��.-� • 7.�w r f000 �000 '� <br /> D. R . <br /> 1, Multiply flow rate by 0.83 to obtairt required area of rock layer. A x 0.83 = <br /> �„os__gpd x 0.83 sq. ft./gpd = ��sq. ft.�,o�� = s�»° <br /> 2. Select width of rock layer(max 10' if<120 mpi_max 5') _ /_ft. <br /> 3. Length of rock layer�area+width= <br /> • �_y2.sq. f t+ _1=_ft•_�ft <br /> , �dth , /u . ft . <br /> <1.20mpi <10' �n s' fr <br /> >1.20mpi c5' <br /> E. ROCK VOLUMfi <br /> 1. Multiply rock area by rock depth to get cubic feet of rock;�2,sq. ft x �•�s' <br /> ft._�cu.ft. <br /> 2. Divide cu. h.by 27 cu. ft/cu.yd. to get cubic yards; <br /> �cu.ft. +27�_cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; a � cu. yd. x 1.4 <br /> ton/cu.yd. �a2.tons. <br /> F. ABSORP'ITON WIDTH ��w�a�a st�z�ei. <br /> 1. Pezcolation rate in top 12 iaches of soil is 1�.y mpi �a��.� ��,�. �` �"� <br /> Texture /L�1�! Lc��v� cM�ii .�+� �..r�.ww <br /> �.�we..ai �e•�+.:..a iso i.00 <br /> a�a� s..a uo i.00 <br /> ,2. Select allowable soil loading rate from table; `»; _„�,�„ �° z� <br /> L• � BPd�� � ii»� m�� wo i� <br /> �t a f0 C�t Lw 0.4S 2.67 <br /> 3. Calculate adsorption width ratlo by dividing rocic layer <br /> flo�it�Ai�130 �r 0.�20 6.00 <br /> loading rate of 1.20 gpd/ft2;by allowable soil loading rate; <br /> 1.20:gpd/f�+�gpd/�� . a•_. <br /> 4. � Multiply adsorptlon width ratlo by rock layer width to get � <br /> required.adso=ption width; <br /> ,��,x.1�_ft=��:2 h <br />