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, �,�� . MOUND DESIGN WORKSHEET <br /> (For Flows up to 1200 gpd) <br /> A. FLOw Fs�se�.n FloM+n aa��a,.par�.r cme) . <br /> Estimated S o�____Q,_$pd ""'i°or �ry�t �tt �tn �ry�rv <br /> or measured=x 1.5 ==SPd. 8°°'°°"" <br /> s �oo xas �eo .o. <br /> a �so aoo 2 i s ,�; <br /> B. SEPTIC TANK I.IQUID VOLUMES � s �600so i'so � '�' <br /> a–�oo o gallons ; � � i�o � <br /> •M <br /> d�w <br /> a �soo a�s �os <br /> C. SOILS(refer to site evaluation) ��"� ��"3 rr�� ,�,,,� �.,� <br /> 1. Depth to restricting layer= �ti`'�30", 3y inches e.,,o,m, � �, <br /> 2. Depth of peroolation tests = ► a" inches <br /> 3. Percolation rate I y.�� mpi za«`:` i.oSOoo i'.'so�o <br /> 4. Land slope �7 % ��_ � � <br /> �.9 s«b�.c.� c�is� <br /> D. ROCK LAYER DIlvF�NNSIONS <br /> 1. Multiply flow rate by 0.83 to obtain required azea of rock <br /> layer:A x 0.83 = <br /> a o . gpd x 0.83 sq.ft./gpd = 4g�sq. f t. <br /> 2 Select width of rock layer(10 feet or less) _ /o ft. <br /> 3. Length of rock layer� area+width= Rock Bed <br /> �� - sq. ft:+ i—ft. =�_ft. ��i� �� � 2��: <br /> . <br /> �{ �s7 dth 510 ft. <br /> Ti?�?� . �. r�• r i��� <br /> E. ROCK VOLUME ~— �"� —� <br /> 1. Multiply rock area by rock depth to get cubic feet of rock; <br /> y,�„sq.ft.x�.o f� a 5�cu. ft. <br /> 2. Divide cu.f�by 27 cu. ft:/cu.yd. to get cubic yards; <br /> ��u,ft, +27=�_cu. yd. <br /> 3. Multiply.cubic yards by 1.4 to get weight of rock in tons; <br /> �cu.yd.x 1.4 ton/cu.yd. _�2.tons. <br /> F. �►�OR��N�D,T•H L►�, L D r4-Wt WIdeA St�n Lbk <br /> 1. Percolatioa rate in top 12 inches of soil is,�,L mpi rM•Ra�•��+� �i�T�t� :,� ": <br /> <ap� i.. a�., <br /> 2. Select allowable soil loading rate from table; Fa:c�r c�an o.i oarse Sand �•20 l.00 <br /> d/ft� oa co5 sana i.2o �.00 <br /> � � $j� 0.1 to 5 Fine Sand" 0•� 2•� <br /> 6 to 15 ndy Loam 0.79 152 <br /> 16 to 30 Loam 0.60 2.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer 3i co as sttc�.oam 2•� <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; i i c�' �-°�' •a 2.6� <br /> a s.00 <br /> 1.20 gpd/ft�+, 4� $pd/ft�a a,c.� . stowachaal2o Cla - - <br /> "Sd1 h���l01i et enan d Ane a v�fine�and <br /> 4. Multiply adsorption width ratio by rock layer width to get <br /> required adsorption width; <br /> �.b7 x�ft= ae, ft <br />