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OSTP Mound Des�gn <br /> UNIVERSITY <br /> Minnesota Pollution �yorksheet > 1 % Stope OF MINNESOTA �`� <br /> Control Agenty �..��.;�- <br /> 1. SYSTEM SIZING: Project ID: v 06.12.13 <br /> A. Design Ftow: 432 GPD TABLE IXa ^ <br /> B. Soil Loading Rate: 0.60 GPD/ftZ LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> Trea[mmt Level C Treatment Level A,A-2,B, <br /> C. Depth to Limiting Condition: 1.5 ft <br /> Percolation Rate Abwrptioa Absorption <br /> Area Loading MDO°� Area Loading �''1Ound <br /> �. Percent Land Slope: 10.0 � (��� Rate Absorption Rate �sorption <br /> (gpd/k') Ratio (�hr� Ratio <br /> E. Design Media Loadin� Rate: 1.2 GPD/ftz ,�;. _ , _ � <br /> F. Mound Absorption Ratio: 2.00 °"`°`' '2 � �.6 � <br /> _ 0��n 5(f��ce sa...^. 0.6 2 � 1.6 <br /> ;ai)le I 3r:?inain.''„�ess..::� <br /> r',IIUND l+if3TUUF L�?�GINt,RATES: ... � 0.78 1.5 � 1.6 <br /> :`.�;,�;.:ra�J �.t.t�a d�rt„ad ' <br /> r.,,.t,:,�r '.�.�%3� 0.6 2 0.78 2 <br /> -'pr�. RdL �F'. �n.OJ�.t�jdOSG'p['4,. -:�UG •.Oadin� 3?;c._ 0.5 2.0 0.76 2 <br /> . �`:'`�' �`.t��'�`� 0.45 2.6 0.6 2.6 <br /> =6�)rr�� �._. I.: �.. %.-�, %.�. _�� 6t tc„G _ 5 0.3 5.3 <br /> ^i 1�c'. ��''� ',r� S I.' . . t< <br /> *Systems with these values are not Type I systems. <br /> _;-:,,, .� F. Contour Loading Rate (linear(oading rate) is a <br /> recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Dispersat Bed Area: Design Flow: Design Media Loading Rate=ftZ <br /> 432 GPD : 1.2 GPD/ftZ = 360 ft2 <br /> if a larger dispersal media area is desired, enter size: 360 ftZ <br /> B. Enter Dispersal Bed Width: 10.0 ft Con not exceed 10 feet <br /> C. Calculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> �0 ftZ X 1•2 GPD/ftz = 12.0 �at/ft Can not exceed Tob(e 1 <br /> D. Ca(culate Minimum Dispersal Bed Length: Dispersal Bed Area : Bed Width = Bed Length <br /> 360 ft2 : 10.0 ft - 36.0 ft <br /> 3. ABSORPTION AREA SIZING <br /> A. Calculate Absorption Width: Bed Width X Mound Absorption Ratio =Absorption Width <br /> 10.0 ft X 2.0 = 20.0 ft <br /> B. For slopes >1%, the Absorption Width is measured downhill from the upslope edge of the Bed. <br /> Calculate Downslope Absorption Width: Absorption Width - Bed Width <br /> Z0.0 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 36.0 ft X 10.0 ft = 360 ft3 : 27 - 13 yd3 <br />