This section 8-4-14 is applicable to commercial and industrial users that have the potential to discharge deleterious wastewaters containing elevated levels of fat, oils, grease and/or soil to the POTW. (Ord. 2016-11-005, 11-10-2016)
The following definitions are supplemental to others in this chapter and applicable to this section 8-4-14:
COMMERCIAL USER: Any business or public or private entity, except for significant industrial users (SIU), who causes or permits the contribution or discharge of wastewater into the POTW; and who may be regulated, where necessary, to comply with this chapter.
COMMON INTERCEPTOR: One or more interceptors receiving deleterious wastewater from more than one establishment.
FOG: Fats, oil and grease of vegetable and animal origin.
FOGS: Fats, oil, grease (of vegetable and animal origin), petroleum oils (or crude oil origin), and soil (sand, dirt, etc.).
FOOD SERVICE ESTABLISHMENT (FSE): Any building, vehicle, place, or structure, or any room or division in a building, vehicle, place, or structure, where: (A) food is prepared, served, or sold for immediate consumption on or in the vicinity of the premises; (B) called for or taken out by customers; or (C) prepared prior to being delivered to another location for consumption.
GREASE INTERCEPTOR: A structure or device designed for the purpose of removing and preventing fats, oils, and grease from entering the sanitary sewer collection system. These devices are belowground units in outside areas with a minimum capacity of one thousand (1,000) gallons.
GREASE TRAP: A device designed for the purpose of removing and preventing fats, oils, and grease from entering the sanitary sewer collection system. These devices are typically compact, under the sink units located near food preparation areas. (Ord. 2016-11-005, 11-10-2016)
A. Grease and sand/oil interceptors, as described by the international plumbing code (IPC), shall be required of any commercial user when the SGRWRF determines they are necessary for the proper handling of wastewater containing FOGS in excessive amounts, except such interceptors shall not be required for residential dwelling units.
B. Any commercial user utilizing a three (3) compartment sink shall be required to have either a grease interceptor or grease trap installed at its own expense and shall be required to comply with maintaining the device as outlined in the St. George city pretreatment operating plan.
C. All construction plans for interceptors shall be submitted to SGRWRF for review and approval prior to installation. All interceptors shall be of a type, construction, and capacity approved by SGRWRF.
D. All interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, watertight, and equipped with easily removable covers which are gas and water tight.
E. All newly constructed commercial structures, strip malls, multi-tenant planned occupied buildings, or planned unoccupied buildings, shall install independent six inch (6") wastewater discharge lines stubbed out within each designated future food establishment unit. If a new source commercial structure, strip mall, or multi-tenant building has planned occupancy by one or more businesses that do not generate FOG, and therefore do not need a grease interceptor, and the owner of the structure does not facilitate the installation of independent six inch (6") wastewater discharge line and install a common interceptor, then no future food establishments shall be permitted, unless facilities are retrofitted for independent lines.
F. All newly constructed “stand alone” commercial structures, strip malls, multi-tenant planned occupied buildings, where a three (3) compartment sink will be utilized, will be required to install a grease interceptor.
G. All existing commercial or industrial businesses shall have one year to install an interceptor upon notification by SGRWRF, where required by SGRWRF standards.
H. Interceptors for businesses that have closed shall be dewatered and cleaned by the owner of said establishment. A representative of SGRWRF may inspect and verify this process has been completed to the satisfaction of SGRWRF.
I. Grease traps are only allowed in place of grease interceptors when in the opinion of the manager it is physically impossible to install a grease interceptor outside of the building or business. As such, a variance request from the owner or lessee of the property must be made to SGRWRF with a certification letter from a duly licensed Utah plumber or engineer. (Ord. 2016-11-005, 11-10-2016)
It shall be unlawful to discharge within SGRWRF jurisdiction, any sanitary wastewater, commercial and industrial waste, or other polluted waters, except where suitable treatment has been provided in accordance with provisions of this chapter. The following are general requirements and prohibitions applicable to this section:
A. The discharge of any substance into the sewer system that exceeds or violates general or specific prohibitions listed in section 8-4-2-1 of this chapter is prohibited.
B. The discharge into the sewer system of FOGS that may accumulate and/or cause or contribute to blockages in the sewer system, or at the sewer system lateral, except as provided herein, is prohibited.
C. Installation and use of food grinders in new and/or remodeled FSEs are not recommended.
D. Emulsifiers, enzymes, or degreasers shall not be added as sewer aids to any plumbing that leads to any interceptor directly or indirectly.
E. The disposal of cooking oil (yellow grease) into the sewer system is prohibited. All waste cooking oils shall be collected, stored, and labeled properly in receptacles such as barrels or drums for recycling or other acceptable methods of disposal.
F. The discharge of wastewater with temperatures in excess of one hundred forty degrees Fahrenheit (140°F) to any FOGS control device, including interceptors and traps, is prohibited.
G. The discharge of waste from toilets, urinals, washbasins, and other fixtures containing fecal materials into sewer lines intended for interceptor service, is prohibited.
H. The discharge to the sewer system of any waste including FOGS and solid materials, that were otherwise removed from an interceptor or other FOGS control device, is prohibited. Wastes removed from interceptors must be hauled off and properly disposed of periodically in compliance with operation and maintenance requirements.
I. Operation of an interceptor with FOGS and solids (floating plus settled) accumulation, exceeding twenty five percent (25%) of the design hydraulic depth of the interceptor, is prohibited.
J. Commercial users, during regular business hours, shall provide to the pretreatment coordinator or his or her designee immediate and safe access to the users’ premises, FOGS handling facilities, and BMP facilities.
K. The pretreatment coordinator may require visual monitoring at the expense of the commercial user to observe conditions of the user’s sewer lateral and lines downstream. (Ord. 2016-11-005, 11-10-2016)
All food service establishments (FSEs) shall be required, at a minimum, to implement and comply with the following kitchen BMPs, whenever applicable:
A. Strainers: Drain screens (strainers) shall be installed on all drainage pipes in food preparation areas.
B. Waste Cooking Oil: All waste cooking oil shall be collected and stored properly in recycling receptacles such as barrels or drums. Such recycling receptacles shall be maintained properly to ensure they do not leak.
C. Disposal Of Garbage And Food Waste: All garbage and food waste shall be disposed of directly into trash bins or containers, and not in sinks, drainage pipes, or the sewer system. Food waste should be disposed of in lined trash bins.
D. Employee Training: Employees of FSEs shall be trained twice each calendar year in the following areas:
1. How to “dry wipe/scrape” pots, pans, dishware, and work areas before washing to remove FOG.
2. How to properly dispose of garbage, food waste, and solids in lined plastic bags prior to disposal in trash bins or containers, to prevent leaking and odors.
3. The location and use of absorbent products to clean under fryer baskets and other locations where FOG may be spilled or accumulated.
4. How to properly dispose of cooking oil from fry equipment into a FOG receptacle such as a barrel or drum without spilling.
5. Training shall be documented, and employee signatures recorded, indicating each employee’s attendance and understanding of the practices reviewed. Training records shall be available for review at any reasonable time by the pretreatment coordinator, or designee.
E. Exhaust Filter Maintenance: Exhaust filters shall be maintained in good operating condition utilizing frequent cleaning practices. Wastewater generated from cleaning exhaust filters shall be disposed properly.
F. Signs: Kitchen BMP and “NO GREASE” signs, posters, or similar information, in appropriate language(s), shall be prominently displayed in the food preparation and dishwashing areas at all times.
G. Drips And Spills: Absorbent materials shall be placed under fryers and other areas where FOG typically or frequently drips or spills.
H. Spill Prevention: Covered devices shall be used in transporting FOG to prevent spills.
I. FOG Containers: FOG containers shall be emptied before they are full to avoid accidental or incidental spills.
J. Spill Kits: “Spill kits” (e.g., absorbent materials) shall be provided and readily available in the event of a spill. (Ord. 2016-11-005, 11-10-2016)
All existing and newly constructed interceptors shall be operated in accordance with the manufacturer’s specifications. The maintenance frequency for all commercial users with interceptors shall be determined by the following:
A. Where installed, an interceptor shall be fully maintained by the user, at its sole expense, in a continuous and efficient manner, and at all times subject to SGRWRF inspection and approval.
B. Interceptors shall be maintained in efficient operating condition by the periodic removal of the full contents of the interceptor. Interceptors shall be fully emptied and cleaned at a frequency such that the combined floating and settled FOGS accumulation does not exceed twenty-five percent (25%) of the design hydraulic depth of the interceptor. This is to ensure that the minimum hydraulic retention time, and required available volume, is maintained to effectively intercept and retain FOGS.
C. If an interceptor at any time is observed by the pretreatment coordinator or his or her designee to contain floating and settled FOGS accumulation in excess of twenty-five percent (25%), the user shall be required to have the interceptor serviced as soon as possible, but no later than ten (10) days from the date the notice of violation was given, such that all FOGS, sludge, and other materials, are completely removed from the interceptor.
D. The owner of the property on which a common interceptor, and/or the facilities discharging to a common interceptor, are located shall be primarily responsible for the maintenance, upkeep, and repair of the interceptor.
E. No commercial user shall increase the use of water or in any other manner attempt to dilute a discharge as a way of achieving compliance with this chapter. (Ord. 2016-11-005, 11-10-2016)
A. Where installed, a grease trap shall be fully maintained by the user, at its sole expense, in a continuous and efficient manner, and at all times subject to SGRWRF inspection and approval.
B. An FSE may use, or be required to install, grease traps, in lieu of installation of a grease interceptor, when, in the opinion of the manager: 1) installation of an interceptor cannot physically be accomplished; 2) there is not adequate slope for gravity flow between kitchen plumbing fixtures and a proposed grease interceptor and/or between the grease interceptor and the private collection lines or the public sewer; or 3) no alternative pretreatment can be installed. Sizing of grease traps shall be performed by a professional engineer or plumber registered in the state of Utah, but shall conform to SGRWRF design standards and construction specifications as a minimum.
C. Grease traps shall be operated in accordance with the manufacturer’s specifications.
D. Grease traps shall be maintained in efficient operating condition by removing accumulated grease on an as needed basis, or the frequency specified by the manufacturer, but no less than weekly.
E. Grease traps shall be fully emptied of all food residues, and any FOG waste, during the cleaning and scraping process.
F. Grease traps shall be inspected periodically, but in no event less than once a month, to check for leaking seams and pipes, and for effective operation of the baffles and flow regulating device. Grease traps and their baffles shall be maintained free of all caked on FOG and waste. Removable baffles shall be removed and cleaned during the maintenance process.
G. Automatic dishwashers and/or food grinder units shall not be connected to, or discharged to, any grease trap.
H. No FSE shall increase the use of water or in any other manner attempt to dilute a discharge as a way of achieving compliance with this chapter. (Ord. 2016-11-005, 11-10-2016)
A commercial and industrial user shall comply with the following notification requirements:
A. Notification Of Spills And/or Sanitary Sewer Overflows (SSO):
1. In the event a user is unable to comply with the FOGS control requirements due to a breakdown of equipment, accidents, or human error, or the user has reasonable belief that its discharge will violate this chapter, the user or its representative shall immediately notify the pretreatment coordinator by telephone.
2. If the material discharged has the potential to cause, or results in, sewer blockage or SSO, the user shall immediately notify the SGRWRF and the pretreatment coordinator by telephone at: (435) 634-5849.
3. Confirmation of this notification shall be made in writing to the pretreatment coordinator no later than five (5) working days from the date of the incident, to the following address: Pretreatment Coordinator, SGRWRF – 3780 S. 1550 W., St. George, UT 84790. The written notification shall state the date of the incident, the reasons for the discharge or spill, what steps were taken to immediately correct the problem, and what steps are being taken to prevent a recurrence.
4. Such notification shall not relieve the user of any expense, loss, damage, or other liability that may be incurred as a result of damage or otherwise arising out of a violation of this chapter, or other applicable law.
B. Notification Of Potential Increased FOGS Discharges: Commercial users shall notify the pretreatment coordinator in writing at least sixty (60) days prior to any facility expansion, and/or remodeling or process modifications that may result in new or substantially increased FOGS discharges, or a change in the nature of the discharge. The user shall submit any information requested by the pretreatment coordinator for evaluation of the effect of such expansion and/or remodeling or process modifications on the user’s FOGS discharge to the sewer system. The written notification shall state the FSE name, name and the title of the user’s contact person or person most knowledgeable concerning the facility expansion and/or remodeling or process modifications, address and telephone number of the user, date of the proposed facility expansion and/or remodeling or process modifications, and the reasons for the same. (Ord. 2016-11-005, 11-10-2016)
The following records shall be maintained for no less than three (3) years, and the commercial user shall make them available to the pretreatment coordinator, or designee:
A. A record or logbook of interceptor or trap cleaning and maintenance practices and activities. The record or logbook shall include:
1. Dates cleaned;
2. Name of waste hauler;
3. Any observations concerning the effectiveness of the interceptor or trap in controlling FOGS; and
4. Any other maintenance performed on the trap or interceptor;
B. A record or logbook of FSE kitchen BMPs being implemented including employee training;
C. Any other information deemed appropriate by the pretreatment coordinator to ensure compliance with this chapter; and
D. Records of any spills and/or cleaning of the lateral or sewer system. (Ord. 2016-11-005, 11-10-2016)
Commercial users are inspected on a regular basis by SGRWRF to determine if the businesses are in compliance with this chapter. The purpose of inspections is as follows:
A. To verify if users are complying with this chapter;
B. To collect and analyze samples and compare results to established discharge limitations;
C. To provide evidence in support of enforcement actions;
D. To verify correction of problems; and
E. To maintain records of user discharge constituents. (Ord. 2016-11-005, 11-10-2016)