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OSTP Mound Design UNIYERSITY � <br /> Minnesota Poliution �yorksheet >1 % Slope OF IVIINNESOTA �.,, <br /> Control Agency <br /> �" 4. SYSTEM SIZING: Project ID: v 06.12.13 <br /> A. Design Flow: 750 GPD TABLE IXa <br /> Z LQADNJG RATES FOR DETERMINqdGG BOTTOM ABSORPT�N AREA <br /> 8. Soil Loading Rate: 0.45 GPD/ft I,t�ID ABSORPTiOM RATIOS USING PERGOUITlON T£ST5 <br /> �teaonent t.w�t c 7raaeaa�e t�at A./M2,s, <br /> C. Depth to Lim�ting Condition: 1.7 ft <br /> �e.a�o�wa � ,r� "�e°°r�n°" �aa�e <br /> D. Percent Land Siope: 1d.0 % � rtm '�0f�"O" � �"0f�"01 <br /> taa�'� 's�,° c� "'n° <br /> E. Design Media Loading Rate: 1.2 GPD/ft2 ro, . � _ � <br /> F. Ahound Absorption Ratio: 2.60 0�to s s.z � �.e � <br /> 01 to 5(ime ssnd 0.6 2 9 1.6 <br /> Tabie t an0� �'"°" <br /> MOUND CONTOUR LOADiIiG RAlES: 6 to tS 0.78 i.fi 1 1.6 <br /> Ca�tour 1e°D 30 0.6 2 o.�a z <br /> Mvawrod ' Toxturo-dvrivod 3,to a� 0.5 a.a o.7s 2 <br /> Porc Rato � nwur►d absaption ra �g <br /> .s�o ea o.as z.e o.a ze <br /> S 6pmpi t.0. 1.3.2.0.2.a.2.b s 12 61°D 120 - $ 0.3 $.S <br /> >120 . . _ . <br /> 61-120 mpi oa 5.0 =12 *5ystems with these values are not Type I systems. <br /> =120 mpf%5.o' ,6• Contour Loading Rate(tinear loading rate)is a <br /> recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> � A. Caiculate Dispersal Bed Area: Design Flow y Design Media Loading Rate=ft2 <br /> 750 GPD Z 1.2 GPD/ft2 = 625 �t2 <br /> If a larger dispersal media area is desired, enter size: 630 ft2 <br /> B. Enter Dispersal Bed Width: 10.0 ft Can not exceed 10 feet <br /> G. Calculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> 10 ftZ X 1•2 GPD/ft2 = 12.0 gal/ft Can not exceed Table 1 <br /> D. Calculate Minimum Dispersal Bed Length: Dispersal Bed Area �:-Bed Width = Bed l.ength <br /> 630 ftz = 10.0 ft = 63.0 ft <br /> 3. ABSORPTION AREA SIZING <br /> A. Catculate Absorption Width: Bed Width X Mound Absorption Ratia =Absorption Width <br /> 10.0 ft X 2.6 = 26.0 ft <br /> B. For slopes>1%, the Absorption Width is measured downhitl 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 /> dISTRIBUTION MEDIA: ROCK <br /> A. Media Volume: Media Depth X Length X Width <br /> ��. <br /> 1.00 ft X 63.Q ft X 10.0 ft= 630 ft3 i 27 = 23 y� <br />