The following provisions of the International Plumbing Code, 2018 Edition (IPC), as amended and revised by the Oklahoma Uniform Building Code Commission, are added, deleted or amended to read as follows:
IPC Chapter 1 Scope and Administration
101.1 Title - Bixby Amendatory. These provisions shall be known and may be cited as the 'Plumbing Code of the City of Bixby' or as the 'Bixby Plumbing Code.'
Section 109 in its entirety, Means of Appeal - Bixby Deleted. Sections 109 through 109.7 of this code are intentionally deleted from the International Plumbing Code, 2018 Edition. Appeals from a decision of the code official shall be governed by Section 9-2-1
of the Bixby City Code.
IPC Chapter 2 Definitions
Building Drain - OUBCC Amendatory. The definition of a BUILDING DRAIN from the International Plumbing Code, 2018 Edition has been modified to align with the industry standard where the site sewer (civil) picks up 5 feet outside of the building. This definition has been modified to read: 'Building Drain. That part of the lowest piping of a drainage system that receives the discharge from soil, waste, and other drainage pipes inside and that extends 5 feet (1524 mm) in developed length of pipe beyond the exterior walls of the building and conveys the drainage to the building sewer.'
IPC Chapter 4 Fixtures, Faucets and Fixture Fittings
410.4 Substitution - Bixby Amendatory. This provision has been modified by the City of Bixby to provide an equivalent standard and requirement other than established by the Oklahoma Uniform Building Code Commission for the installation of drinking fountains in occupancies with an occupant load fewer than 100. This section has been modified to read: 'Where restaurants provide drinking water in a container free of charge, drinking fountains shall not be required in those restaurants. In occupancies with an occupant load of fewer than 100, where bottled drinking water is provided free of charge, drinking fountains shall not be required. In other occupancies where drinking fountains are required, water dispensers shall be permitted to be substituted for not more than 50 percent of the required number of drinking fountains.'
IPC Chapter 10 Traps, Interceptors, and Separators
1001.1.1 General Requirements - Bixby Added. This provision has been added by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission by specifying particularly when the provisions of Section I 001 shall be applicable. This section has been added to read: 'The requirements of Section 1001 are applicable to all establishments primarily engaged in activities of preparing, serving, or otherwise making foodstuffs available for consumption and establishments that use one or more of the following preparation activities: cooking by frying (all methods), baking (all methods), grilling, sauteing, rotisserie cooking, broiling (all methods), boiling, blanching, roasting, toasting, or poaching. Also included are infrared heating, searing, barbecuing, and any other food preparation activity that produces a hot, non-drinkable food product in or on a receptacle that requires washing. These establishment include restaurants, delis, bakeries, cafeterias, hotels, motels, hospitals, nursing homes, schools, grocery stores, prisons, jails, churches, camps, caterers, manufacturing plants, or any other similar sewer users as determined by the City.'
1001.1.2 Trap and Interceptor Construction and Installation-Bixby Added. This provision has been added by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission by specifying more particularly how grease traps and interceptors shall be constructed and installed. This section has been added to read: 'The following specifications must be incorporated into each grease trap and interceptor design.
1. Grease traps and interceptor shall be located outdoors.
2. The grease interceptor shall be constructed with a minimum of two (2) baffles.
3. Water temperatures must be less than 120 degrees prior to entering the grease trap. Grease traps are to be installed at a minimum distance often feet (10') from sinks and dishwashers to allow for adequate cooling of the waste water.
4. All grease bearing waste streams shall be routed through an appropriate grease trap or interceptor, including: three-compartment sinks, pot and pan sinks, soup kettles, hand-washing sinks, dishwashers, mop sinks and floor drains.
Exceptions: Drains which receive "clear waste" only, such as from ice machines, condensate from coils and drink stations, may be plumbed to the sanitary system without passing through the grease interceptor with the condition that the receiving drain is a "hub" type that is a minimum of two inches (2") above the finished floor.
5. All exterior grease traps and interceptors shall be installed with an effluent sampling well. Sample wells will have a minimum twelve inch (12") diameter access cover and a minimum four inch (4') drop from inlet to outlet piping through the sampling well. Sample wells must be tested for leakage.
6. All grease traps and interceptors shall be installed on the exterior of the structure.
7. Where food waste grinders connect to a grease trap or interceptor, a solids interceptor shall separate the discharge before connecting to the grease trap or interceptor as, required by this code.
8. Mechanical traps and interceptors that are installed above-ground must be equipped with an influent flow regulator and an effluent valve assembly that allows for sample collection.'
1001.1.3 Minimum Sizing of Traps and Interceptors-Bixby Added. This provision has been added by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission by specifying more particularly how grease traps and interceptors shall be sized. This section has been added to read: 'Sizing determinations are based on operational data provided by an occupant. It is the responsibility of the occupant to insure the appropriate level of treatment necessary for compliance with environmental and wastewater regulations. Minimum acceptable grease trap and interceptor sizing shall be determined as follows:
1. The minimum size is 750 gallons, unless sizing calculations according to formulas found in Section 1001.1.4 or an engineer's calculations exceed the minimum 750 gallons. All calculations shall include fifty percent (50%) excess capacity.
2. When sizing calculations provided by a licensed engineer result in a determination of a grease trap less than 750 gallons in capacity, the calculations with the trap or interceptor documentation recommended shall be submitted to the City for review. The calculations shall include fifty percent (50%) excess capacity.'
1001.1.4 Grease Trap and Interceptor Sizing Formulas-Bixby Added. This provision has been added by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission by specifying formulas for determining how grease traps and interceptors shall be sized. This section has been added to read: 'It is the responsibility of the generator and the generator's engineer to ensure that the wastewater discharged from their facility complies with the City's discharge limitations. For the purpose of plans review, a general assessment of grease trap and interceptor design and size shall be performed using the formulas provided in this section. (These formulas have been demonstrated as industry standards capable of achieving the City's discharge criteria when systems are maintained in proper condition. However a licensed engineer may use an alternate method and submit the calculations with the trap or interceptor information for review.)
Method One:
M x W x R x S = Required Size (liquid capacity)
Where:
M = number of meals per peak hour. Number of meals served at peak operation hour (seating capacity) x peak factor. The peak factor for fast food restaurants shall be 1.33. The peak factor for all other food service types shall be 1.00.
W = waste flow rate. The waste flow rate with a dishwasher shall be a six (6) gallon flow and the waste flow rate without a dishwasher shall be a five (5) gallon flow. The waste flow rate for a single service kitchen shall be a two (2) gallon flow and the waste flow rate for a food waste disposer shall be a one (1) gallon flow.
R = retention time. Retention times for commercial kitchen waste and dishwashers shall be two and one-half (2.5) hours. The retention time for a single service kitchen shall be one and one-half (1.5) hours.
S = the storage factor. For fully equipped commercial kitchens having an eight (8) hour operation, the storage factor shall be one (1), for sixteen (16) hour operations the storage factor shall be two (2), for twenty-four (24) hour operations, the storage factor shall be three (3). For single service kitchens, the storage factor shall be one and one-half (1.5).
Method Two: (Five (5) Hour Detention/Peak Flow)
GxAxPxD = Required Volume of Trap
G = gallons of water used per hour of operation.
A = average 'gray water' flow per hour. The average 'gray water' flow per hour shall be 0.75.
P = peak flow factor. The peak flow factor shall be 1.9.
D = hours of detention. The hours of detention shall be 5.
Method Three: (Alternate Sizing Formulas-Proposals)
Food service establishments that propose the use of alternate sizing techniques or procedures that result in specifications that differ from calculated requirements (or are less than the required minimum of 750 gallons), shall submit formulas and other basis' to support the proposed grease trap size and installation. Submissions must provide documentation supporting the proposal's ability to meet effluent quality requirements. Proposals must be signed by a licensed plumbing contractor or professional engineer. Under no circumstances shall a grease trap smaller than 500 gallons be accepted.'
1003.1 Where Required - Bixby Amendatory. This provision has been modified by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission and greater protections to building drainage, public and private sewer systems. This section has been modified to read: 'Interceptors and separators shall be provided to prevent the discharge of oil, grease, sand and other substances harmful or hazardous to the building drainage system, the public sewer, the private sewage disposal system or the sewage treatment plant or processes. Design, size and location of pretreatment devised must be submitted by a licensed plumbing contractor or professional engineer for review and approval by the City.'
1003.4.2.2 Garages and Service Stations - Bixby Amendatory. This provision has been modified by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission and greater protections to public sewer systems. This section has been modified to read: 'Where automobiles are serviced, greased, repaired or washed or where gasoline is dispensed, oil-water separators shall have a minimum capacity of 500 gallons for the first 1,000 square feet of area to be drained, plus 250 gallons for each additional 1,000 square feet of area to be drained into the separator. An effluent sampling well shall also be installed in accordance with Section I 001.1.2 of this code. Parking garages in which servicing, repair or washing is not conducted and in which gasoline is not dispensed shall not require a separator. Areas of commercial garages utilized only for storage of automobiles are not required to be drained through a separator.'
1003.4.2.3 Car Washes - Bixby Added. This provision has been added by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission to specifically regulate car washes. This section has been added to read: 'Where automobiles are washed, separators shall have a minimum capacity of 1,000 gallons for the first bay, with an additional 500 gallons of capacity for every other bay. Wash racks must be constructed to eliminate or minimize the impact of run-off from rain and storm events. Minimum requirements include roofed structures, with at least two walls, and appropriate grading to prevent stonnwater infiltration into the sanitary sewer. An effluent sampling well shall also be installed in accordance with Section 1001.1.2 of this code.'
1003.6 Laundries - Bixby Amendatory. This provision has been modified by the City of Bixby to provide higher standards and requirements than established by the Oklahoma Uniform Building Code Commission and greater protections to public sewer systems. This section has been modified to read: 'Commercial laundries, laundromats, and dry-cleaners shall be equipped with an interceptor in order to reduce the quantity of lint and silt that enter the collection system. The system must be of adequate size and design to allow for cool-down of wastewater so that separation can be more readily achieved. The interceptor must be installed with a wire basket or similar.
IPC Appendices
Appendix A - Bixby Deleted. The following appendix of the ICC International Plumbing Code, 2018 Edition, is intentionally deleted from this code:
APPENDIX A PLUMBING PERMIT FEE SCHEDULE
Appendices B through E - Bixby Added. The following appendices of the ICC International Plumbing Code, 2018 Edition are specifically referred to, adopted and made a part of this code, as if fully set out in this chapter:
APPENDIX B RATES OF RAINFALL FOR VARIOUS CITIES
APPENDIX C STRUCTURAL SAFETY
APPENDIX D DEGREE DAY AND DESIGN TEMPERATURES
APPENDIX E SIZING OF WATER PIPING SYSTEM
(Ord. 2189, 6-2-2016; amd. Ord. 2415, 9-26-2022)