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- • DOSING CHAMBER SIZING <br /> , � <br /> 1. Determine area i �.,a�r <br /> A. Rectangle area = L x W !' I I <br /> � ' <br /> x = square feet — <br /> B. Circle area= �t(3.14) x radius in feet x radius in feet i �^s�^ I <br /> 3.14 x ft x ft= sqft <br /> C. Get area from manufacturer sqft Radius <br /> 2. Calculate gallons per inch I <br /> There are 7.5 gallons per cubic foot of volume, therefore multiply the area (lA, B or C) <br /> times 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 = gallon per inch <br /> 3. Calculate total tank volume Legal Tank: <br /> A. Depth from bottom of inlet pipe to tank bottom i,�, 500 gailo�is or <br /> B. Tota] tank volume= depth from bottom of inlet pipe to tank bottom (3A)x gal/in (2) 100% the Daily flozu <br /> = in x gal/in=,,�,� gal ,6�i/� �,ik►%�� T-••�S or <br /> Alternating Pumps <br /> 4. Calculate gallons to cover pump (with 2-3 inches of water covering pump) <br /> (Pump and block height(inch) +2 inch) x gallon/inch A•1: EslimaledSewageRowsinGallonsperDay <br /> (��_in +2 in) x �S eal/in= ..�o gallon numberol <br /> bedrooms Class I Class II Clau III qau IV <br /> 5. Calculate total pumpout volume p 300 �5 �gp � <br /> A. Select pump size for 4-5 does per day. Gallon per dose=gpd (see figt�re A-1) 3 C�0 300 218 cfthe <br /> / doses per day=�gpd =�_doses/day= /2 e� gallons 4 600 375 256 voiues <br /> B. Calculate drainback 5 150 460 294 �nrhe <br /> 1. Determine total pipe length,�Qfeet 6 900 52S 332 Clos' <br /> 2. Determine liquid volume of pipe,[ •t ��gal per ft(see figt�re E-20) 1 IQ�A 600 310 il,or�!i <br /> 3. Drainback quantity=��-'ft(5B1) x jZ�gal per ft(5B2) _�_gal 8 1200 6)� �08 co!umns <br /> C. Total pump out volume=dose volume (5A) +drainback(5B3) <br /> /Z o eal +�_ga1 = /�� Total gallon E-20: Volume of Liquid in Pipe � <br /> 6. Float separation distance (using total pumpout volume) Pipe Diamete Gallons per foot <br /> Total pumpout volume (5C)�-gal/inch (2) �i 1 S <br /> /Z� ga1= Z�eal/in= -� inch 1 0.04� <br /> 1.25 � 0.078 � <br /> 7. Calculate volume for alarm (typically 2 to 3 inches) 1.5 0.11 � <br /> Alarm depth (inch) x gallon/inch (2) _ .� in x ZS gal/in) _ �p gal 2 0.17 i <br /> 2.5 025 � <br /> 8. Calculate total gallon= gallons over pump (4) +gal]ons pumpout(5C) + gallons alarm (7) 3 0.38 i <br /> �S-o gal +�2S gal+ •S_ O ga1= �2.5' gallons 4 O.b6 <br /> 9. Total Tank Depth = total gallon(8)=gallon/inch(2) ; ����•�ti��y�• <br /> `S"2-i gal -�s eal/in= .2/ in < <br /> ���fF`.��rF•`.i�sl.'i,.7'.i,Y�+�i 6`._ <br /> inlet ;.<„ .:,, rr., .y,::.ra,: >.:. <br /> r <br /> pipe ;<, eservz ca aci �` <br /> Recommended: �t p � �r alarm on <br /> Calculate reserve capacity (75% the daily flow) ;:;� �` <br /> �� _ _ _ _ _ _ _ _ _•;;� control <br /> Daily flow x .75 = G�2 x .75 = �Qgallons pumpout volume� �� <br /> _f�' <br /> �r -- ------------- - - �:� Pump on <br /> �` pump off� :; control <br /> E= control �1 <br /> `�:���;f,:aa�f,:va�wt �J�•;ti"r�•ri�r{•ri'"S,` <br /> I hereby certify that I have completed this work in accordance with applicable ordinances, rules and laws. <br /> � (signature) �9� (license#) ��- 2 -o�_(date) <br />