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19 <br /> <br />Drainage Fixture Units 1 Nominal Interceptor Volume (gallons) <br />21 750 <br />35 1000 <br />90 1250 <br />172 1500 <br />216 2000 <br />307 2500 <br />342 3000 <br />428 4000 <br />576 5000 D <br />724 6000 D <br />880 7000 D <br />1036 8000 D <br />>1036 8000 D <br /> <br />Note: <br />1 Drainage Fixture Units (as defined in the currently adopted Uniform Plumbing Code) for <br />installed equipment plumbed to kitchen drain lines connected to the Grease Removal System. <br />C. No conventional interceptor smaller than 750 gallons shall be installed without <br />prior approval of the Director. High-Efficiency or High-Capacity Interceptors not <br />meeting minimum volume criteria shall be reviewed and approved on a case-by- <br />case basis. If a garbage disposal/garbage grinder/macerator or similar unit is <br />installed, the minimum size is 1500 gallons to adequately retain the added settleable <br />solids loading. <br />D. The maximum size for an interceptor shall be 4000 gallons. If the calculated <br />minimum size is larger than this, two interceptors of approximately equal size shall <br />be installed in series. If the calculated minimum size is 8000 gallons, two 4000- <br />gallon interceptors shall be installed in series. <br />E. Shared Grease Interceptors (Multi-Tenant/Strip Center). The number or volume of <br />interceptors shared by multiple tenants/users may be adjusted if deemed necessary <br />by the Director or Director’s Designee, based on an assessment of square footage, <br />size of water service, and/or the nature of the FSEs or NFDs served. <br /> <br />3.7 Flow Controls <br /> <br /> All hydromechanical trap-style grease removal systems shall have an internal or external <br />flow control installed to ensure that wastewater flow through the trap does not exceed the <br />manufacturer’s design flow rating. This flow control shall be maintained in operating <br />condition at all times. <br />