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� � OSTP Mound Design ��-w� ��,,. <br /> � . <br /> UNIVERSITY �� �` <br /> Minnesota Pollution �yorksheet > 1% Slope OF MINNESOTA ' <br /> Controi Agency ''"` ' "`-° '�\�; <br /> 1. SYSTEM SIZING: Project ID: v 06.12.13 <br /> A. Design Flow: 750 GPD TABLE {Xa <br /> 6. Soil Loading Rate: 0.60 GPD/ftZ LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> Treatment lerel C TreaLnent Level A,A-2,B, <br /> C. Depth to Limiting Condition: 1.7 ft <br /> Verwlation Rate ������ �rption <br /> D. Percent Land Slope: 8.0 % �n�> /ve R�ding ��i°�� Area�Locding �°n� <br /> m <br /> (3Pd/ft') Ratio t�ft�� Rat90 <br /> E. Design Media Loading Rate: 1.2 GPD/ftZ �et . � _ � <br /> F. Mound Absorption Ratio: 2.00 0'�°5 ,.z , ,.6 , <br /> 0.�to 5{ftre sarxi 0.6 2 1 1.6 <br /> Table f and wa t���r,oy <br /> 1.i�UND CONT0l3R LOADlPIG RATES: 6 iO1` 0.�8 i.s � �.s <br /> Contour �5 tc 30 0.6 2 0.78 2 <br /> r,�east:rad ' Texturs-ds�iv�d <br /> Perc Rate dR mound aDsorption ratio loading 31 to 45 0.5 2.4 0.78 2 <br /> . Rate: ��o� 0.45 2.6 0.6 2.6 <br /> -��54nt0' i.G. 1.3. 2.0. 2.4, 2.6 ct2 6ito t20 - 5 0.3 5.3 <br /> , »20 - - - - <br /> 5i-12Gmpi UR SA c12 <br /> "Systems with these values are not Type I systems. <br /> � �zo n,�;• .s.�• .�• Contour Loading Rate(linear loading rate)is a <br /> recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Dispersal Bed Area: Design Ftow: Design Media Loading Rate=ftZ <br /> 750 GPD s 1.2 GPD/ft2 = 625 ft2 <br /> tf a targer dispersat media area is desired, enter size: 630 f� <br /> B. Enter Dispersat Bed Width: 10.0 ft Can not exceed 10 feet <br /> C. Catculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> �� ftz X 1•2 GPD/ftZ = 12.0 gaUft Can not exceed Tab1e 1 <br /> D. Calcutate Minimum Dispersat Bed Length: Dispersat Bed Area :Bed Width =Bed l.ength <br /> 630 ft2 : 10.0 ft = 63.0 ft <br /> 3. ABSORPTION AREA SIZING <br /> A. Calcutate Absorption Width: Bed Width X Mound Absorption Ratio =Absorption Width <br /> 10.0 ft X 2.0 = 20.0 ft <br /> B. For stopes>1%, the Absorption Width is measured downhill from the upslope edge of the Bed. <br /> Calculate Downslope Absorption Width: Absorption Width - Bed Width <br /> 20.0 ft - 10.0 ft = 10.0 ft <br /> 4. DISTRIBUTION MEDIA: ROCK <br /> A. Media Volume:Media Depth X Length X Width <br /> 1.00 ft X 63.0 ft X 10.0 ft= 630 ft3 : 27 = 23 yd3 <br />