14.42.190 Grease removal system sizing.
A. Trap-style grease removal systems shall be sized in accordance with the standards in the currently adopted plumbing code.
B. The minimum size for an interceptor-style grease removal system shall be determined using the following table:
|
Drainage Fixture Units1 |
Nominal Interceptor Volume (gallons) |
|---|---|
|
21 |
750 |
|
35 |
1,000 |
|
90 |
1,250 |
|
172 |
1,500 |
|
216 |
2,000 |
|
307 |
2,500 |
|
342 |
3,000 |
|
428 |
4,000 |
|
576 |
5,000 |
|
724 |
6,000 |
|
880 |
7,000 |
|
1,036 |
8,000 |
|
>1,036 |
8,000 |
1 Note: Drainage fixture units (as defined in the currently adopted plumbing code) for installed equipment plumbed to kitchen drain lines connected to the grease removal system.
C. In no case shall an interceptor smaller than seven hundred fifty gallons be installed without prior approval of the director. If a garbage disposal/garbage grinder/macerator or similar unit is installed, the minimum size is one thousand five hundred gallons to adequately retain the added settleable solids loading.
D. The maximum size for an interceptor shall be four thousand gallons. If the calculated minimum size is larger than this, two interceptors of approximately equal size shall be installed in series. If the calculated minimum size is larger than eight thousand gallons, two four-thousand-gallon interceptors shall be installed in series. (Ord. 3071-08 § 3.6, 2008.)