(a) 
New facilities.
All non-domestic users listed in section 13.07.790 that begin new operations on or after the effective date of this division shall be required to design, install, operate and maintain a treatment device and sample port. These users are considered new facilities when one or more of the following conditions are met.
(1) 
An entire facility is newly proposed or constructed and the city has not issued a certificate of occupancy for the facility prior to the effective date of this division; or
(2) 
An existing facility in whole or part, will be remodeled or renovated, where such facilities did not exist prior to the effective date of this division and the remodeling or renovation will increase or has the potential to increase the amount of fats, oils and grease, flammable wastes, sand and other pollutants that discharge to the wastewater collection system.
New facilities shall not commence any operations until installed treatment devices and sample ports are inspected by the city's plumbing inspector and pretreatment services department and the facility receives a certificate of occupancy.
(b) 
Existing facilities.
All non-domestic users existing within the city prior to the effective date of this division shall maintain existing treatment devices, at the user's expense, in an efficient operating condition at all times.
(1) 
The city may require an existing non-domestic user that ceases operations and/or undergoes a change in ownership or tenant occupancy to install new or additional treatment devices and/or sample ports or modify/repair any noncompliant plumbing, existing treatment device or sample port prior to re-commencing operations when one of the following conditions exist:
(A) 
Prior to re-commencing operations, the new owner and/or operator performs remodeling or renovation to the existing facility which will increase or has the potential to increase the amount of fats, oils and grease, flammable wastes, sand and other pollutants that discharge to the wastewater collection system;
(B) 
The prior owner and/or operator of the existing facility experienced compliance problems and/or failed to design, install and/or maintain required treatment devices or sample ports prior to ceasing operations;
(C) 
The prior owner and/or operator of the existing facility had an undersized, irreparable or defective treatment device or sample port; or
(D) 
The prior owner and/or operator of the existing facility did not have plumbing connected to a treatment device and sample port in compliance with the requirements of this division.
Existing facilities shall not re-commence any operations until installed treatment devices and sample ports are inspected by the city's plumbing inspector and pretreatment services department and the facility receives a certificate of occupancy.
(2) 
The city may require an existing non-domestic user to install new or additional treatment devices and/or sample ports within 90 days of written notification by the city or modify/repair any noncompliant plumbing, existing treatment device or sample port within 30 days of written notification by the city when any one or more of the following conditions exist:
(A) 
The user, either alone or in conjunction with other users, is contributing fats, oils and grease, sand or other pollutants in quantities sufficient to cause accumulation or necessitate increased maintenance on the POTW or causes interference at the wastewater treatment facility;
(B) 
The user is not maintaining the existing treatment device in an efficient operating condition at all times;
(C) 
The user has an undersized, irreparable or defective treatment device or sample port;
(D) 
The user does not have plumbing connected to a treatment device and sample port in compliance with the requirements of this division;
(E) 
The user is experiencing difficulty in achieving compliance with this division or other portions of this article; and/or
(F) 
The food service establishment (FSE) or insignificant food service establishment (IFSE) modifies food manufacturing, processing, or preparation activities, installs dishwashers, food waste grinders or other food service equipment that was previously prohibited or otherwise has increased the potential to generate additional grease-bearing waste discharges that in the opinion of the city would violate the requirements in this division.
(3) 
The city manager may authorize an extension of time to achieve compliance with this section for an additional 90 days unless the non-domestic user, either alone or in conjunction with other users is:
(A) 
Interfering with the operation of the POTW by contributing fats, oils and grease, sand or other pollutants in quantities sufficient to cause blockages, obstructions, or pass-through;
(B) 
Contributing fats, oils and grease, sand or other pollutants in quantities sufficient to cause back-ups or sanitary sewer overflows onto public or private property or into the MS4;
(C) 
Posing a threat to public health or the environment; or
(D) 
Violating requirements specified in this division or other sections of this article.
(4) 
In any circumstance where, in the opinion of the city, the existing treatment device and sample port or the absence of a treatment device or sample port poses a serious threat or an ongoing problem to the POTW, is a public nuisance, or poses a threat to public health or to the environment, the city may require the treatment device or sample port be installed or replaced on a more stringent compliance schedule.
(Ordinance 6459 adopted 1/21/22)
(a) 
All permitting, construction and inspection activities must be completed in accordance with Chapter 3, Building Regulations, of the city’s Code of Ordinances.
(b) 
All treatment devices and sample ports shall be installed by a licensed plumber. Treatment devices and sample ports shall be subject to inspection by the city's plumbing inspector and pretreatment services department prior to the issuance of a certificate of occupancy.
(c) 
Specifications outlined in the FOG control program shall be considered minimum requirements only. It shall be the responsibility of each user to have a treatment device and sample port designed, installed and maintained to comply with the requirements of this division.
(1) 
Treatment devices, sample ports or other appurtenances shall meet or exceed the specifications and requirements set forth in the FOG control program and other applicable local, state or federal requirements.
(2) 
An existing treatment device, sample port or other appurtenance which is upgraded or replaced shall also meet or exceed the specifications and requirements set forth in the FOG control program and other applicable local, state or federal requirements.
(d) 
Treatment devices, sample ports or other appurtenances shall be located to be readily and easily accessible for cleaning and inspection of the device.
(Ordinance 5523, sec. 2, adopted 11/3/08; Ordinance 6459 adopted 1/21/22)
(a) 
Sizing requirements described in the FOG control program are intended as guidance in determining treatment device sizing that will provide a minimum degree of protection against wastes containing fats, oils and grease, flammable wastes, sand and other pollutants which may be harmful to the user’s building drainage system or the POTW.
(b) 
The city will provide minimum sizing requirements for treatment devices based on information provided by the non-domestic user or their contractors. Accordingly, the non-domestic user or their contractor is responsible for ensuring the appropriate level of treatment necessary to achieve compliance with this division or other portions of this article.
(c) 
This section is not intended to create any liability for the city for the failure of a system to adequately treat wastewater to achieve compliance with this division or other portions of this article.
(Ordinance 5523, sec. 2, adopted 11/3/08)
(a) 
The city shall establish minimum sizing criteria for passive grease interceptors using the drainage fixture unit sizing method described below:
(1) 
The hydraulic loading from each fixture unit is equal to 7.5 gallons per minute (gpm);
(2) 
The total hydraulic loading on the grease interceptor is determined by the sum of fixture units multiplied by 7.5 gpm;
(3) 
A minimum of a 12-minute retention time is required through the grease interceptor even though all fixtures may not discharge simultaneously;
(4) 
Minimum grease interceptor capacity = total number of fixture units x 7.5 gpm x 12 minute retention time.
Table 1-1 Fixture Unit Chart
Fixture Description
Fixture Unit
Single compartment sink
2
Double compartment sink
2
Triple compartment sink
3
Hygiene "only" sink
1
Dish machine
6
Pre-rinse sink
2
Mop sink
3
Tilt kettle trough receptor
3
Grease extracting hood receptor
3
Wok stove
4
Dipper well
2
2" floor troughs/sink
2
3" floor troughs/sink
3
4" floor troughs/sink
4
(b) 
Passive grease interceptors shall be constructed in accordance with city specifications, and shall have a minimum of two compartments with fittings designed for grease retention.
(c) 
All grease bearing wastes streams must be routed through the passive grease interceptor.
(d) 
Floor drains shall be connected to the passive grease interceptor, but those drains with no fixtures attached such as a sink, dishwasher or other fixture will not be used in the sizing calculation.
(e) 
Drains that receive only "clear wastes" from ice machines, condensate lines, or other applicable fixtures, may be plumbed to the sanitary sewer without passing through a treatment device with the condition that the receiving drain is a "hub" type that is a minimum of two inches (2") above the finished floor.
(Ordinance 6459 adopted 1/21/22)
Minimum sizing criteria for other treatment devices will be based on current engineering practice and approved by the city on a case-by-case basis.
(Ordinance 5523, sec. 2, adopted 11/3/08)
(a) 
Any non-domestic user that installs and/or commences the operation of food waste grinders on or after the effective date of this division will be required to install a properly-sized solids separator prior to discharging to a grease interceptor.
(b) 
In those cases where an existing non-domestic user has a food waste grinder installed and/or operational prior to the effective date of this division, the city may require the user to implement best management practices as described in section 13.07.793 of this division when the device:
(1) 
Contributes excessive food solids that reduce the efficiency of existing treatment devices;
(2) 
Interferes with the operation of the POTW by contributing fats, oils and grease, solids or other pollutants in quantities sufficient to cause blockages, obstruction of flow, pass-through, and/or contributes to accumulation or increased maintenance on the POTW;
(3) 
Contributes fats, oils and grease, solids or other pollutants in quantities sufficient to cause back-ups or sanitary sewer overflows onto public or private property or into the MS4;
(4) 
Poses a threat to public health or the environment; or
(5) 
Causes and/or contributes to the user’s noncompliance with requirements specified in this division or other sections of this article.
(Ordinance 5523, sec. 2, adopted 11/3/08; Ordinance 6459 adopted 1/21/22)
(a) 
MFUs shall be required to submit an approved plan review to the city from the Grayson County Health Department (GCHD) that indicates the commissary that will be used to store the unit, prepare food, fill water tanks and dispose of waste tank contents.
(b) 
All approved MFUs shall utilize a common commissary approved by the GCHD unless there is no such location. Commissaries shall be approved on a case-by-case basis if a common commissary is not available.
(c) 
If the MFU proposes to discharge its waste tank to an approved passive grease interceptor at an alternate FSE location, the MFU shall obtain approval from the city to do so.
(d) 
An MFU shall discharge its waste tank to an acceptable treatment device or obtain permission from an active FSE with a passive grease interceptor not smaller than 500 gallons and submit an application that is provided by the city for consideration.
(e) 
If an FSE gives permission to a MFU to discharge to its passive grease interceptor, the FSE assumes responsibility for the contents of the discharge from the MFU.
(Ordinance 6459 adopted 1/21/22)