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HomeMy WebLinkAbout20-159 Grease Interceptor CalculationsFixture Connected to FOG equipment Fixture Drain Size (inches) Qty “A” X Fixture rating (GPM) “B” X Fixture multipler “C” = Maximum GPM “D” Sum of column “D” (GPM) = “E” X Retention Time, Minutes X 24 = Minimum Grease Interceptor size, Gallons Calculation Sheet Uniform Plumbing Code Appendix H Grease Interceptor Sizing (# of meals per peak hour) x (waste flow RATE) x (retention) x (storage) = SIZE (1) (2) (3) (4) Factors: 1) # of meals served at peak operating hour (Seating Capacity) x (Peak Factor) a. Peak Factor for Fast Food Restaurant is……1.33 b. Peak Factor for all other food service types is…1.00 2) Waste Flow Rate: a. with dishwasher…………………………….………… 6 gallon flow b. without dishwasher…………...……………………… 5 gallon flow c. single service kitchen……………………………..… 2 gallon flow d. food waste disposer………………...…………………1 gallon flow 3) Retention times a. commercial kitchen waste/dishwasher……….…………2.5 hours b. single service kitchen/single serving…………………….1.5 hours 4) Storage factors a. Fully equipped commercial kitchen…... 8 hr. operation = 1 b. Fully equipped commercial kitchen..... 16 hr. operation = 2 c. Fully equipped commercial kitchen …..24 hr. operation = 3 d. Single service kitchen…………………………………...= 1.5 MY FACILITY: 1.) # meals per peak hour = _________ 2.) Waste flow RATE = __________ 3.) Retention = ____________ 4.) Storage = ___________ ______________ X ______________ X ______________ X ______________ = __________ Size in Gallons #1 X #2 X #3 X #4 = SIZE in Gallons 133 2 2.5 1.5 2 133 2.5 1.5 ITEM 7 1,248 997.5 ITEM 19 ITEM 20 ITEM 23A ITEM 25 ITEM 32 ITEM 93 1 1/2" 2" 2" 2" 1 1/2" 2 1 1 1 1 33 33 33 15 15 10 6 .25 .25 1 .25 .5 8.25 7.5 8.25 8.25 3.75 52