(A) Where required. Fats, oils, and grease (FOG) removal systems shall be installed where the discharge of grease-laden waste from food preparation, food processing, or other commercial establishments into the City wastewater disposal system may cause an impediment or obstruction of the City's wastewater collection system. FOG removal systems shall be required for:
(1) new food service or food processing establishments;
(2) existing food service or food processing establishments that are undergoing a remodeling project with costs greater than $100,000; and
(3) high risk facilities and facilities that have had previous FOG-related problems or violations.
At the discretion of the City, the installation of FOG removal systems may be required in problematic areas that continually experience FOG related wastewater collection system blockages.
(B) Owner responsibility. All owners that are required to install a FOG removal system shall be responsible for cleaning and maintaining the FOG removal system located on the subject property, and shall maintain accurate records of the dates of point cleaning and means of FOG disposal. This record shall be subject to inspection by the City. All costs incidental to the FOG removal system shall be borne by the owner.
(C) Registration Requirement. All owners that are required to install a FOG removal system shall register their FOG removal system with the City. The City will provide the owner with a registration number which will be a FOG permit number. The City shall keep a log of FOG removal systems.
(D) Grease Removal Systems. An approved FOG removal system shall be installed by one or by a combination of the following passive or active technology methods. A passive technology method utilizing a grease trap or a grease interceptor, approved by the City, may be utilized by the owner. An active technology method utility a grease recovery device or an approved solids transfer/grease recover device, approved, by the City, may be used.
(E) Passive FOG Removal System Requirements.
(1) Grease traps. The size, type, and location of each grease trap shall be approved by the City. Grease traps shall be sized and engineered based upon the anticipated load and/or conditions of actual use. Grease traps of pre-case or poured in place concrete shall be constructed of sound durable material, not subject to excessive corrosion or decay, and shall be water and gas tight.
(2) Grease interceptor. Grease interceptors shall be sized and based upon the anticipated load and/or conditions of actual use. Grease interceptors shall receive grease laden waste discharge from major point sources. A floor drain shall not be considered a major point source. Grease interceptors shall have the grease retention capacity indicated in Table 1 for the flow-rates indicated. Grease interceptors shall be equipped to control the rate of flow.
(F) Active FOG Removal System Requirements - Grease Recovery Devices. Grease recovery devices shall be permitted in lieu of grease interceptors or grease traps in accordance with the following requirements:
(1) Location. Grease recovery devices shall receive all grease laden waste discharge from the major point source. A floor drain shall not be considered a major point source.
(2) Sizing. Grease recovery devices shall be sized based upon the anticipated load and/or conditions of actual use.
(3) Capacity. Grease recovery devices shall have a minimum retention capacity indicated in Table 1 for the flow-rates indicated.
Table 1 | ||||||||||
SIZING AND RATING |
Table 1 | ||||||||||
SIZING AND RATING | ||||||||||
Sizing Symbol | 4 | 7 | 10 | 15 | 20 | 25 | 30 | 35 | 50 | 75 |
Flow Rate | ||||||||||
GPM | 4 | 7 | 10 | 15 | 20 | 25 | 30 | 35 | 50 | 75 |
Liters/Second | 0.25 | 0.44 | 0.4 | 1 | 1.3 | 1.6 | 1.9 | 2.2 | 3.2 | 4.7 |
Retention Capacity | ||||||||||
Pound | 8 | 14 | 20 | 30 | 40 | 50 | 60 | 70 | 100 | 150 |
Kilogram | 3.6 | 6.4 | 9.1 | 14 | 18 | 23 | 27 | 32 | 45 | 68 |
(G) Alternative and Prohibited FOG Removal System Methods.
(1) Alternative Technology / Methods. Engineered alternative technology or methods may be permitted by the City, provided the technology or method meets the minimum performance standards set forth by in this Chapter.
(2) Biological or Chemical Treatment Agents. Biological or chemical treatment agents for the separation, emulsification and/or removal of FOGs shall be prohibited.
(3) Discharge of hot wastewater. Wastewater from dishwasher machines or wastewater that otherwise exceeds 130°F shall not be introduced into any grease removal system.
(4) Food-waste grinders. Food-waste grinders shall not discharge into any building drainage system through a grease interceptor, grease trap, or grease- recovery device.
(Ord. No. 2005-18, passed 10-5-05)