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OSTP Mound Design Worksheet <br /> UNIVERSITY <br /> Min�esota Pollution >1% Slope OF MINNESOTA �'�"' <br /> Control Agency - .. <br /> 1. SYSTEM SIZING: Project ID: v 11.09.22 <br /> A. Design F(ow(Flow&Soi!- 1.A) : 300 GPD TABLE IXa <br /> B. Soil Looding Rate(Flow&Soil-3.C): 0.45 GPD/ftZ LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> C. Depth to Limiting Condition: 1.7 ft Treatment Level C Treatment Level A,A-2,B, <br /> Percolation Rate ��Ption Absorpcion <br /> D. Percent Land Slope: 8•� �i Area Loading �`�Ound Area Loading M°und <br /> ���� Rate Absorption Rate �5°rptio� <br /> E. Design Media Loading Rate: 1.2 GPD/ft� (gpd/{t'j Rat'° �,��ft=� Ra�° <br /> F. Mound Absorption Rotio(Table IXa): 2.60 �o i - � - i <br /> o,c�s tz � i.s i <br /> G. Desiqn Contour Looding Rote: 12.0 GPD/ft o i�o s�r��5a�a <br /> r j�_,�r� and loam fine sand 0.6 2 1 1.6 <br /> Ma.illNp C�iNTf111R Lt)'�GINt�R4TE�� 9 to t5 0.78 1.6 1 '1.6 <br /> .:;nt�>�.,i �6 to 30 0.6 2 0.78 2 <br /> ,- ���ure. � <<ura det�..�d <br /> �_ F..�t� --'F :nt� �dat,o wn;,�Gi,�; � �in� 31to45 <br /> - F` �.:,.�: 0.5 2.4 0.78 2 <br /> �to 60 0.45 2.6 0.6 2.6 <br /> . ,_ �,_. ,._. ... _ _ � ..f< <br /> � 69 to�20 - 5 0.3 5.3 <br /> � . ,. • _.. �.I:: >12� . - - - <br /> 'Systems with these values are not Type I systems. Contour Loading Rate(linear <br /> loading rate)is a recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Required Dispersa(Bed Areo:Design F(ow (1.A):Design Media Loading Rate (1.E) =ft� <br /> If a larger dispersal media area 300 GPD: 1.20 GPD/ftZ = 250 ftz <br /> is desired, enter size: 255 ftZ <br /> B. Calcula[e Disperso(Bed Width:Contour load�ng Rate (1.G):Design Media Loading Rate (1.E)=Bed Width , <br /> 12.0 ft : 1.2 gpd/ftZ = 10 ft <br /> C. Calculate Dispersa(Bed Length: Dispersa(Bed Areo (2.A):Bed Width (2.6)=Bed Length <br /> 255 ftZ : 10 ft = 26 ft <br /> D. Select Disperwl Media: ROCk <br /> E. If using a registered product, enter the Component Length: �in= 12 = �ft <br /> F. If using a registered product, enter the Component Width: �in � 12 = �ft <br /> G. Number oj Components per Row =Bed Length (2.C)divided by Component Length (4.J) (Round up) <br /> � ft : � ft= �components/row <br /> H. Number of Rows =Bed Width (2.6)divided by Component Width (4.K) (Round up) Note: CLR of f0.3 <br /> gal/ft results in 9 foot <br /> Adjust Contour Loading Rate on Design Summary page until this number is a whole number �de bed. <br /> � ft+ � ft= � rows <br /> �, Tota!Number of Components =Number of Components per Row X Number of Rows <br /> � X � �components ' <br />