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. i <br /> OSTP Mound Design <br /> UtvlvExst�rY ��� a <br /> MinnesotaPoNution �yorksheet > 1 % Stope OF MINNESOTA .., <br /> �ontrol Agency �.- ��., - <br /> 1. SYSTEM SIZiNG: Project ID: v 06.12.13 ' <br /> a. Design Flow: 750 �P� 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 /> Treatment level C Treatment Level A,A4,B, <br /> C. Depth to Limiting Condition: 1.5 ft -- <br /> Percolation Ra[e Abwrptwn Absorption <br /> Area Loading �`1ound Area Loading �`�Ound <br /> �. Percent Land Slope: 10.0 � ��� Rate Abwrption Ra[e �5°rption ��, <br /> (4Pd�hr) Ratio (��ft�� Ra[io <br /> E. Design Media Loading Rate: 1.2 GPD/ftz _ <br /> �,� , � <br /> F. Mound Absorption Ratio: 2.00 , �2 � �_6 � <br /> Tat�le( <br /> ��,-:�� r ,•�,,,-,n, ae z � a.s � <br /> t,�,iiUND C�iNT�)Uk LUapIPJG R,�TES: , �� o.�e �.s � �.s ��� <br /> .t�:.c i <br /> •���•-_: 0.6 2 0.78 2 <br /> �'.�,?iUta� ' ,TurTu�P -d4tiJ4d - ' <br /> �_�' _oadin� 3�tc '. 0.5 2.4 0.78 2 <br /> ��u��'. F-3Cq �-,pu-ld l�. �.�ptl„���3t�0 -, <br /> . Rata: s:;b-;.�:C; 0.45 2.6 0.6 2.6 �� <br /> _�'::it.� I_,. I.�. �.ii _.-.. �.. � _.� °�t''�"''i - 5 0.3 5.3 � <br /> %-t ,__ -.tCi �-.F `,-.i.- . <br /> 'Systems with these values are not Type I systems. <br /> :-,,.,,_,. ; F, Contour Loadin� Rate (linear loading rate)is a <br /> recommended value. <br /> 2. DISPERSAL MEDIA SIZING <br /> A. Calculate Dispersal Bed Area: Desi�n Flow= Design Media Loading Rate=ftZ <br /> 750 GPD : 1.2 GPD/ftz = 625 ftz <br /> If a larger dispersat media area is desired, enter size: 630 ftz , <br /> B. Enter Dispersal Bed Width: 10.0 ft Can not exceed 10 feet <br /> C. Catculate Contour Loading Rate: Bed Width X Design Media Loading Rate <br /> �� ftZ X 1•2 GPD/ftz = 12.0 gaUft Can not exceed Table 1 <br /> D. Catculate 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. Calcutate Absorption Width: Bed Width X Mound Absorption Ratio =Absorption Width <br /> 10.0 ft X 2.0 = 20.0 ft <br /> B. For slopes >t%, the Absorption Width is measured downhill from the upslope ed�e of the Bed. ; <br /> Calculate Downslope Absorption Width: Absorption Width - Bed Width I <br /> 20.0 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 63.0 ft X 10.0 ft= 630 ft3 s 27 = 23 yd3 <br />