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� OSTP Mound Design UNIVERSITY <br /> MinnesotaPollution �yorksheet > 1 % Slope OF MINNESOTA ,� �„ <br /> Corrt�ol Agency ��, <br /> 1. SYSTEM SIZING: Project ID: v 07.14.15 <br /> a. Design Flow: �5o GPD TABLE IXa <br /> B. Soil Loading Rate: 0.45 GPD/ft2 LOADING RATES fOR DETERMINING BOITOM ABSORPTION AREA <br /> AND ABSORPTION RATIOS USING PERCOLATION TESTS <br /> 7Ye�tmeM Level C T►tatmeM Leval A,A•2,b, <br /> C. Depth to Limiting Condition: 2.2 ft <br /> D. Percent Land Slope: 9.0 % �r��"'�'> � �"�'�°10� ��� A"�� �� <br /> cea�+�� c�'► R'�O <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 _ _ <br /> <01 1 1 <br /> F. Mound Absorption Ratio: 2.60 0„°s 1.2 1 1.6 � <br /> o,�o s�n���o o.s 2 � �.s <br /> Table 1 and�oa �i�e sa�d <br /> MOUND CONTOUR LOADING RATES: 6�0'S o.�e �.s a �.s <br /> Mwwrod ' Toxturo•dorivod <br /> Concour 's'o 30 o.g z o.7a 2 <br /> P01'C RdtO � mOurd dbSOfptiOn rat ���� 31�o� 0.6 2.4 0.78 2 <br /> ��: 46 to 60 0.46 2.8 0.8 2.B <br /> s 60mpi 1.0. t.3.2.0.2.4.2.6 _12 s�to�zo . 5 0.3 5.3 <br /> , >�20 - - - • <br /> 61•120 mpi OR 5.0 _12 <br /> . "Systems with these values are not Type I systems. <br /> : 120 mpi' ,5,p� _6. Contour Loading Rate (linear loading rate) is a <br /> recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A• Calculate Dispersal Bed Area: Design Flow= Design Media Loading Rate =ftZ <br /> 750 GPD : 1.2 GPD/ft2 = 625 ftZ <br /> If a larger dispersat media area is desired, enter size: 630 ft2 <br /> B. Enter Dispersal Bed Width: 10.0 ft Can not exceed 10 feet <br /> C. Calculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> 10 ftZ X 1•2 GPD/ftz = 12.0 gal/ft Can not exceed Table 1 <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area : Bed Width = Bed Length <br /> 630 ftZ = 10.0 ft = 63.0 ft <br /> 3. ABSORPTION AREA SIZING <br /> A. Calculate Absorption Width: Bed Width X Mound Absorption Ratio =Absorption Width <br /> 10.0 ft X 2.6 = 26.0 ft <br /> 6. 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 /> 26.0 ft - 10.0 ft = 16.0 ft <br /> 4. DISTRIBUTION MEDIA: ROCK <br /> A. Media Volume: Media Depth X Length X Width <br /> 0.50 ft X 63.0 ft X 10.0 ft= 315 ft3 = 27 = 12 yd3 <br />