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ff <br /> o.�s.,� <br /> ����c Job#� <br /> TREATME'N[T <br /> p'RO+G�Tir617 ,�. w,�. ! <br /> U�nr�rsity af Minn�sota Mound Qesign Worksheet <br /> Great�rthan 1�a Stopes <br /> A FLOW <br /> Estimated 750 gpd(see figtue A-1J <br /> or measur� x 1.5(safeiy f�tor)= 0 gpd <br /> B. SEPTIC TANK LtQU#D YOUEMfS <br /> Septic tank capaaty 3000 gallons{see figu�G9) <br /> Numbzr af tanks/ca�np�ments 0 <br /> Eifiuerrt Flter (Yes/no) ye,s <br /> G7 Septic Tank Capacily in Eaalbns <br /> Number af Minimum Cap�ity wifh Capaat}r with <br /> Bedrooms Capaaiy Garb.Disp. Disp.and Lift <br /> 2 arless 754 1125 '150Q <br /> 3 or 4 3Dp0 1500 - ,'20Q0 <br /> 5 or 6 150� 2250 30�U <br /> 7,8 or 9 20U0 3�0 : �00� <br /> C. SOItS(Site evaluation dataj <br /> 1. Depth to restrid'mg hayer- 2.1 feet <br /> 2. Depth of p�lation tests= 12 inches . <br /> 3. Texture Ioam <br /> 4. Sa1 foa�ng rate(see F'igu►e D-33) D.6Q gpol ft <br /> Pe►�ola�on rate 7 MPI <br /> 5. %Land Slope 8.Q yy <br /> D. ROCK LAYER DIMENStONS <br /> 1. Mul6ply average design flow(A)by�.83 to o�n requi�ed area of rodc layer:Item A x 0.83= <br /> 75U gpd x Q.83 ft/gpd= 630 ft� <br /> 2. Def�mine rock layer width =(�.83 f[`/gpd x Linear Load'mg ftate(LLRj(see LLR chart <br /> 0.83 ft�/gpd x 12.00 = 10.0 #t <br /> LLR Chart� <br /> Pe�lc Rafie L1R <br /> <120 MP! <=72 <br /> . >=120 MPI <� <br /> 3. Length of rock layer=area�vided by width= <br /> q0.0 ft� / 10.0 feet= 63.0 R <br /> E. ROCK VOLUME <br /> 1. Multipty rodc area by rodc depth to g�cubic feet of rodc <br /> 630.0 X 1.0 ft= 630.0 ft <br /> 2. Divide ft�by 27 ft�to get cu5ic yards . <br /> 630.0 ft! 27 = 23.3 yd3 <br /> 3. MulGply cubic yards by 1.4 to get weight of rock in tons; <br /> 23.3 yd' X 1.4 toNyd3 = 32.7 ions <br /> Page 1 of 5 <br />