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OSTP Mound Desi n � <br /> � UNIVERSITY "� <br /> MinnesotaPollution �yorksheet � � � S�� e OF MINNESOTA <br /> Control Agency p �+z,�J- <br /> 1. SYSTEM SIZING: Project ID; v 06.12.13 <br /> a. Design Flow: 600 GPD TABLE IXa <br /> B. Soit Loading Rate: 0.45 GPD/ft2 �OADING RATES FOR DETERMINING BOITOM ABSORPTION AREA <br /> AND ABSORPTION RATI05 USING PERCOLATION TESTS <br /> Treatment Level C TreatmeM�evel A,A•2,8, <br /> C. Depth to Limiting Condition: 1.8 ft <br /> Percolatlon Rate '�OfP�O� ��rption <br /> Area Loading �und Area Loading �u� <br /> D. Percent Land Slope: 3.0 % �'"`�'> eac� '��"°" Rate "��°`�"°" <br /> (�d�=) RaHo (��ftt) Ratio <br /> E. Design Media Loading Rate: 1.2 GPD/ftZ <br /> <o, � � <br /> F. Mound Absorption Ratio: 2.60 0"°5 �,2 � �.s � <br /> o,�o s�n�e�� o.s z � �.s <br /> Table I and�oa tine sand <br /> MOUND CONTOUR LOADING RATES: �1O�5 o.�e t.5 1 1.6 <br /> hteasured ' Texturc-dcrivod <br /> COt1t0Uf �6 to 30 0.6 2 0.76 2 <br /> Perc Rate �R mound absorp[an ratio Loading 3i�o Qs o.5 2.4 0.78 2 <br /> � �t�' �t�� 0.45 2.6 0.6 2.6 <br /> =60mpi 1.0, 1.3. 2.0. 2.J. 2.6 _�z si�o izo - 5 0.3 5.3 <br /> . >1zo . . . _ <br /> 61-120 mpi OR 5.0 . _1z <br /> . �Systems with these values are not Type I systems. <br /> � 120 mpi• ,5,0� ,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 = ft� <br /> 600 GPD = 1.2 GPD/ftz = 500 ftz <br /> If a larger dispersal media area is desired, enter size:�ft2 <br /> B. Enter Dispersat Bed Width: 10.0 ft Con not exceed 10 feet <br /> C. Calculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> �� ftz X 1•2 GPD/ftz = 12.0 gal/ft Can not exceed Toble 1 <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area = Bed Width = Bed Length <br /> 500 ftz : 10.0 ft = 50.0 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 /> 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 /> 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 /> 1.00 ft X 50.0 ft X 10.0 ft = 500 ft3 = 27 = 19 yd3 <br />