A commercial kitchen's grease interceptor is sized using which two factors?
Not quite. The answer is D: Wastewater flow rate and the retention/detention time needed for grease to separate out
Grease separates by gravity as wastewater slows and cools, so interceptors are sized around the flow they must handle and how long it must sit: a hydromechanical unit is sized so the connected fixtures' capacity does not exceed a multiple of its certified flow rate in gpm, and a gravity interceptor's volume comes from the DFU load on a 30-minute retention basis. Employee counts or roof area don't measure the wastewater stream at all.
Checked against the 2021 UPC text. Washington's exam is written against the 2015 edition, which we have not read for this section, so confirm it against your 2015 book.
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