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• . , . ' . DOSING CHAMBER SIZING <br /> � 1. Determine area � <br /> A. Rectangle area = L x W w�un <br /> x = squarefeet ! <br /> B. Circl� area =rz (3.14) x radius in feet x radius in feet I �„g,n I <br /> 3.74 x ft x ft = sqft <br /> C. Get area from manufacturer sqft <br /> Radius <br /> 2. Calculate gallons per inch <br /> There are 7.5 gallons per cubic foot of volume, therefore multiply the area(lA, B or C) <br /> tiines the conversion factor and divide by 12 inches per foot to calculate gallon per inch. <br /> Area x 7.5+12= sqft x 7.5+12 in/ft = ZS.O gallon per inc <br /> ���`"~ l �J �' /UGo � � Legal Tarik: <br /> 3. Calcul�te total tank volwne - / <br /> A. Depth from bottom of inlet pipe to tank bottom "`7`'� in� 500 gallorts or <br /> B. Total tai k vo]ume= de�th from bottom of inlet pipe to tank bottom (3A)x gal/in(2) 100% the Dail�flow <br /> _ �in X Z�.�,Qal/in = 000 gal <br /> or <br /> 4. Calcul�te galJons to cover pump(with 2-3 inches of water covering pump) Alternating Purn�s <br /> (Pum ai�d block height (inch) + 2 inch) x allon/inch A•l: EslimatedSewageFbwsin6aUUonsperDuy <br /> ( � in +2 in) x�gal/in = �-�O gallon ons <br /> nurriber <br /> 5. Calculate total pumpout volume bedrooms Clossl Claull Classlll ClossiV <br /> A. Select pump size for 4-5 does per day. Gallon per dose =gpd (see ure A-1) 2 � n5 180 60� <br /> / doses er da Od d = hg 3 � � 218 of the <br /> � Y=—.�_gp �_doses/day= / Z o gallons q 60p 3�5 256 �dues <br /> B. Calculate drainback 5 �50 450 294 nfhe <br /> 1. Determine total pipe length,7a feet 6 900 525 332 Clnul <br /> 2. Determine liquid voluine of pipelJ.l7 gal per ft(see figure E-20) 1 1050 600 310 N,alu <br /> 3. Drainback quantity=��ft (5B1)x 4,/7 gal per ft (5B2) _�al 8 1200 675 408 co�•• <br /> C. Total pump out volume=dose volume(5A) + drainback (5B3) <br /> /Z o gal + /Z gal = % 7� Total gallon E-20: Volume of Liyuid in Pipe � <br /> :� <br /> 6. Float separation distance(using total pumpout volume) Pipe Diamete G�llons per t0ot <br /> Total pu►rpout volume(5C)�gal/inch (2 <br /> �3 z. ga'1= Z.S g�l/in= .S'�.� inch 1 0.045 <br /> 7. Calculate valtune for alarm (typically 2 to 3 inclles) l��` 0.078 <br /> l.5 � � <br /> Alarm depth (indl)x gallon/inch (2) _�_in x � gal/in)_ �Sgai � � .17 <br /> 8. Calculale tutal ballon - allons over pum �+ gallons um out(5C) +gallons alarm(7) 3 0,b I <br /> Z._�G eal +�2. gaI +�gal=�gallons � � <br /> � 4 U,66 <br /> 9. Total Taitk Depth = total allon (8) +gallon/inch (2) �a.W`• �oo �Y ,�;,,��Y; � ,�// <br /> OC�CJ al+ 2-�eal/in = ` G_—in :� <, Q�y <br /> inlet �"���i��Si•rii�ylfi���,'��;�r�ti��; ,�,�� H <br /> �• Y•�� , <br /> Recommended: p pe �'=' eserve capa 'ty '`. <br /> �'t <br /> Calculate reserve capacity (75% the daily flow) ��' � �;,; `�3 �� ;� alarm c <br /> Daily flow x .75 = oc x .75 = �Sv gallons � ��:+ - - - - - - - - - �; control <br /> pumpout volume� �3 z. j :;. <br /> e 3�.c�� — 5`�3 9 -5 s`' '�t <br /> ---------- --- - ,,;� pump on <br /> � ` pump off %�� control <br /> .�, �� : <br /> � „ :.:, �, ;i <br /> U ���i:� ':':�i�`:�i:� '•r�•;ti'r�•;ti'r�r:ti'�:�' <br /> by ertify that I hav completed t11is work in accordance with applicable ordinances, niles and laws. <br /> C?���—/��. � /G <br /> (signature) ! /3/ � (license#) 7 Z � � (�j;�t�) <br />