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�... ._. �, ., <br /> ' MOUND DESIGN WORKSHEET ' S <br /> (For Flows up to 1200 gpd) <br /> A. �OW + Fstimated Sewage Flows ia Cnllont per day <br /> '� ^ d) <br /> Estimated�O��;pd z � Number 'fype 1 Type II Type ID Type <br /> or measured - x 1.5 =� gpd. °` `� <br /> a� 2 3ao zzs tso �,K <br /> B. SEPTIC TANK LIQUID VOLUMES � : a � 3� 2� ofa� <br /> �000 gallons : . � � '� 6 9 0 °su � �� <br /> � +¢^�` �� 7 1050 60� 3)0 Type 1. <br /> �,,,. ,•� y° iK � � �� 8 1200 6�5 408 uj <br /> C. SOILS (refer to site e�al n�� �� � ; "� .,� � „ °°'�°°� <br /> ' �� ��� �� <br /> 1. Depth to restricti�g r� '= inches /�3 feet ,;�,v,w„o,r <br /> � �'711II�1C111( /�'�1IIIIGWDIII�YIO{J�t/Ci�fi�lyv�L �If7141fPOSi�Qf <br /> 2. Depth of percolat"�io t ts� inches �w� ��r �a�, �,�� <br /> 2�*� �so i��s isoo <br /> 3. Texture Perc'�12t�on rate ��3 o mpi 3,x. �� ,� � <br /> 4. Land slope�/o �SR"�y 2� �° ,�° <br /> D. ROCK LAYER DIMENSIONS <br /> 1. ' Multiply flow rate by 0.83 to obtain required area of rock layer: A x 0.83 = <br /> oC� gpd x 0.83 sq. ft./gpd =cT'odsq. ft. <br /> 2. Select width of rock layer {max 10' if<120 mpi max 5') _ /b ft. <br /> 3. Length of rock layer = area_width = � Q e n e. Q o , ._.e, o e<e,,Q <br /> 4 0 o/�.a�.o> �o^�eo>e pll�. <br /> Sbo sq. ft. . �_ft. _ �'0 1 L_ oQ:es,!Qa eD,0,d8D ooe�Qa <br /> .QQOd°�o:QQ e.o:e re ea:a'o o p� _ <br /> 0 0�Q��O'�DOU�DD qj,1:. <br /> Width�ft Qoeoo�+ o�0'aO�D➢ 9 e) � <br /> � <120mpi <10' Length �o � ft� <br /> E. ROCK VOLUME >120mpi <5' <br /> 1. Multiply rock area by rock depth to get cubic feet of rock;S'� sq. ft. x�_ <br /> ft. =S�cu. ft. <br /> 2. Divide cu. ft.by 27 cu. ft./cu. yd. to get cubic yards; <br /> �� cu. ft. =27= 28 cu. yd. <br /> 3. Multiply cubic yards by 1.4 to get weight of rock in tons; zo cu. yd. x 1.4 <br /> ton/cu. yd. =7�tons. <br /> F. ABSORPTION WIDTH �� Absorption Width Siring Table <br /> 1. Percolation rate in top 12 inches of soil is �n mpi ��x„t� ��,� ,���,�;� <br /> Texture ��'N' '�`� Miourcs per Inch Sal Teznue per day per w�i�h to Rock <br /> (MPI) squacc fooc liyc�Yidth <br /> Fasur Nan 0.1 Coarx Sand 110 1.00 <br /> 0.t to 5 Saod 1.20 1.00 <br /> 2. Select allowable soil loading rate from table; o.,�s Fine Sand o.�o z.00 <br /> , ^ ��/� 6 io 15 Sandy L,oam 0.79 1.52 <br /> .(/v 16 co 30 Loam <br /> it SO 24p <br /> 46 ro 60 Clay[.oam 0.45 267 <br /> 60 w 120 Clay 0.24 5.00 <br /> 3. Calculate adsorption width ratio by dividing rock layer �'°"�*'��°�zo c,�y o�0 6.00 <br /> loading rate of 1.20 gpd/ft2 by allowable soil loading rate; <br /> 1.20 gpd/ftz= i(oo gpd/ftz= Z�oo . <br /> 4. Multiply adsorption width ratio by rock layer width to get <br /> required adsorption width; • <br /> Z x /o ft=�Qft 4 <br />