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�` � ' MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) <br /> A. FLOW �a s.�►�.t.��u+c.u«��ar <br /> Estimated �_gpd c� �i �n �m � <br /> or measured - x 1.5 = - gpd. <br /> z �oo ns �so �, <br /> � 4so soo 2ia �,� <br /> B. SEPTIC TANK LIQLTID VOLUMES 6 � � � � <br /> a--/D D lo gallons . � <br /> - � � toso 60o sro « <br /> .�+►.�w��c aa' I s ! �20o e�s ,oe �m� <br /> C. SOILS (refer to site evaluation) ' ' <br /> us� �� � <br /> 1. Depth to restricting layer= 12�►�,,�G inches - feet ��r <br /> 2. Depth of percolation tests= �z inches <br /> � ��� �� <br /> 3. Texhue L�-�`� Lo,�-w► Percolation rate, �t.� mpi 's"' �� �� � <br /> 4. Land slope C� % '''"y '000 '0°° �°°° <br /> D. R K LAYER.DIMENSI N , <br /> 1. Multiply flow rate by 0.83 to obtain required area of rock layer. A x 0.83 = S'A� �-aaQ <br /> c,�c�gpd x 0.83 sq. ft./gpd = 4�� sq. ft. '° �'� �Z� <br /> 2. Select width of rock layer (max 10' if<120 mpi max 5') _ /o ft. <br /> 3. Length of rock layer= area+width = �,��y'� �-�"'o� �w y�y <br /> �µ,��)!' .M� ' w. r: <br /> � ��sq. ft. + �o ft. _�o ft• �.r, -� •���,.b,, .p:� � , . � <br /> Width �o ft � . <br /> <120mpi <10'. Length �o ft <br /> E. ROCK VOLUIviE >120mpi <5' <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; y��sq. ft x /-�s� <br /> ft. _��-cu. £t. <br /> 2. Divide cu. ft. by 27 cu. ft./cu. yd. to ge#cubic yards; <br /> 2�- cu. ft. +27 =�._cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons;l�.cu. yd. x 1.4 <br /> ton/cu. yd. _ .�Z tons. <br /> F. ABSORPTION WIDTH Absotpdoo Wldth Sl�TYbla <br /> 1. Percolation zate in top 12 inches of soil is �+.� mpi �,���� ��T�� ��� ��� <br /> Texture ����-( t..6 A-_�✓1 crti�si ,�r.�` �ya wiam <br /> P..r.m..o,i c�s.va i�o i.00 <br /> aias saoa iao i.00 <br /> 2. Select allowable soil loadin rate from table; o.�q s �,a S°°° o.�o x°° <br /> .� a�� d�is s�er�„ a�9 i.sz <br /> '`4.— $P ii a u s�a��.o.m o�s�o i�o <br /> 4a w 60 �o.m o.�s xa� <br /> � - �oa im � o.a� s.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer �'°"'"''"i120 �' o�o s.ao <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading nte; <br /> 1.20 gpd/ft�+ . ��gpd/ft�_ . z,�� . <br /> 4. • Multiply adsorption width ratio by rock layer width to get <br /> required adsozption width; <br /> .�2 x /o ft=��ft <br />