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i <br /> � OSTP Mound Design <br /> UNIVERSITY �, � <br /> Minnesota Pollution O ����� �� <br /> OF MINNESOTA �- '�L <br /> ControlAgenty Worksheet � 1 � ��.�� <br /> 1. SYSTEM SIZING: Project ID: v 06.12.13 <br /> a. Design Flow: 260 GPD TABLE IXa <br /> B. Soil Loading Rate: 0.45 GPD/ft2 LOADING RATES FOR DETERMINING BOTTOM ABSORPTION AREA <br /> AND ABSORPTION RATI05 USING PERCOLATION TESTS <br /> TreatmcM Level G Treaiment Level A,A•2,6, <br /> C. Depth to Limiting Condition: 2.0 ft <br /> Absorption Absorpiion <br /> Permlation Rate Nound Mbund <br /> Nea Loading Area Loading <br /> D. Percent Land Slope: 6.0 % �''�'� Rate Absorption Rate �'S°rption <br /> ���ft=� Ratio ���ft=� RaHo <br /> E. Design Media Loading Rate: 1•2 GPD/ft2 _ _ <br /> <0� 1 1 <br /> F. Mound Absorption Ratio: 2.40 °'`p5 '�2 ' �.s � <br /> o^to s(r�ne sar+d o.s 2 1 'I.s <br /> TdbIP I and Ioam fine�aM <br /> RIOUNU CONTOUR LOADtNG RATES: s�o i5 o.7s 1.5 t �.s <br /> r.!4awred ' Texture -deiivQd <br /> Contour �6 to 30 o.e 2 o.7a 2 <br /> P91"C RdC4 �� f��o�nd adsorpnon?dClO �oading 31�a 45 0.5 2.4 0.78 2 <br /> , R�t9: :,�=o gp 0.45 2.6 0.6 2.6 <br /> -60R1�' t.U, 1.3� 2.C. 2.-4. 2.5 C1Z 6'Ito�20 - 5 0.3 5.3 <br /> »20 ' _ • - <br /> 51-tZQmpi CR 5.�? _t2 <br /> . "Systems with these values are not Type I systems. <br /> - uc n,�,� ,s ,,,� _h. 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 =ft2 <br /> 260 GPD = 1.2 GPD/ft2 = Z17 ft2 <br /> tf a larger dispersal media area is desired, enter size: 220 ftZ <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 ft2 X 1•2 GPD/ftz = 12.0 gaUft Can not exceed Tab(e 1 <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area = Bed Width = Bed Length <br /> 220 ft2 : 10.0 ft = 22.0 ft <br /> 3. ABSORPTION AREA SIZING <br /> A. Calculate Absorption Width: Bed Width X Mound Absorption Ratio =Absorption Width <br /> 10.0 ft X 2.4 = 24.0 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 /> 24.0 ft - 10.0 ft = 14.0 ft <br /> 4. DISTRIBUTION MEDIA: ROCK <br /> A. Media Volume: Media Depth X Length X Width <br /> 1.00 ft X 22.0 ft X 10.0 ft = 220 ft3 : 27 = ��yd3 <br /> � � <br />