A. 
Best management practices for fats, oil and grease (FOG) for food service establishments. The BMPs set forth below establish requirements for owners and operators of any food service establishment that has the potential to discharge floatable or settleable material.
1. 
Unless otherwise approved by the Control Authority, food service establishments shall install, and properly operate and maintain, a grease removal device in compliance with the requirements as set forth in this chapter, the Uniform Plumbing Code and the City’s Side Sewer and Sanitary Sewer Availability Manual, as adopted and amended by the City.
2. 
Food service establishments shall not discharge or cause to be discharged any wastewater in violation of 12.08C.100.
3. 
If the Control Authority determines at any time that an existing grease removal device is incapable of adequately retaining the floatable and settleable material, or if it was installed in such a manner that it cannot be inspected or properly maintained, the food service establishment shall install a grease removal device that complies with this chapter, and the requirements of the Uniform Plumbing Code and the City’s Side Sewer and Sanitary Sewer Availability Manual as adopted, and amended, within ninety (90) days after being notified by the Control Authority of such requirement unless an alternative schedule is approved by the Control Authority.
4. 
General control requirements. The following general requirements apply to all food service establishments that install, or are required to install, a grease removal device.
a. 
A grease removal device shall be required for the proper handling of liquid wastes which may be harmful to, or cause obstruction in, the POTW or cause or contribute to pass through or interference.
b. 
It shall be the responsibility of the food service establishment and owner of the property to obtain any necessary permits from the appropriate regulatory authority prior to installing a grease removal device or modifying a facility’s plumbing system to accommodate the installation of a grease removal device. The timing of review and approval of any permits that may be required shall in no way relieve the food service establishment from the responsibility of producing a discharge that complies with the provisions of this chapter.
c. 
The grease removal device shall be designed, sized, installed, maintained and operated to accomplish the intended purpose of intercepting pollutants from the food service establishment’s wastewater and preventing the discharge of such pollutants to the POTW, including pollutants that result in toxic, noxious or malodorous conditions that create a public nuisance or unsafe working conditions, which endanger life or the environment.
d. 
Upon change of ownership or operator of any existing food service establishment required to have an approved grease removal device under this section, the applicant for sanitary sewer service shall have the burden to demonstrate that a properly sized, maintained and functioning grease removal device is installed.
e. 
All sinks connected to a grease removal device shall be equipped with a fixed or removable mesh or screen to catch garbage and food debris and prevent it from entering the grease removal device.
f. 
The industrial user and food service establishment shall ensure all grease removal devices are easily accessible for inspection, cleaning, and removal of FOG.
g. 
The food service establishment shall maintain grease removal devices at its expense to ensure the device operates as designed to remove accumulated FOG. All such maintenance shall meet the requirements under the uniform plumbing code as adopted, and amended, by the City.
h. 
Food service establishments required to use and maintain a grease removal device shall maintain a written record every time the device is pumped, cleaned or repaired. This record shall include the date, the name of the company that pumped, cleaned or repaired the device, and the amount of waste that was removed. Such records shall be maintained for a period of three (3) years, unless a longer retention period is specified in writing by the Control Authority, and made available to the Control Authority upon request. The removed contents from any GGI and other approved grease removal devices shall be handled by a person licensed to haul such waste and shall be disposed of in accordance with applicable federal and state regulations and local ordinances.
5. 
Required maintenance.
a. 
All grease removal devices shall be regularly cleaned so that the devices operate as designed to intercept fats, oil and grease from the food service establishment’s wastewater and prevent the discharge of such materials into the POTW. All grease removal devices shall be serviced in accordance with manufacturer instructions at a minimum of every ninety (90) days or more frequently if the combined thickness of the floating greases and settled solids is greater than 25% of the hydraulic working capacity of the grease removal device or if toxic, noxious, malodorous conditions create a public nuisance or endanger worker or public health. The Control Authority may require more frequent cleaning if the minimum cleaning period is inadequate to meet the purpose and intent of this chapter, or less frequent cleaning if the industrial user can demonstrate to the Control Authority’s satisfaction that less frequent cleaning is sufficient.
b. 
Biological treatment or enzyme treatment shall not be a substitute for the servicing of a grease removal device. Use of enzymes or other chemical or biological treatment or product that emulsifies or acts to emulsify FOG is prohibited unless approved by the Control Authority.
c. 
The food service establishment shall document the volume removed and the disposal of each pump-out with a waste manifest or disposal receipt, which shall be maintained by the food service establishment on site for at least three (3) years. The Control Authority may require food service establishments to submit that information electronically to the Control Authority.
6. 
Variance.
a. 
A variance from the requirements of this section may be granted by the Control Authority when the installation of the required size GGI may be impractical due to limited space or other factors. The food service establishment may request a variance by submitting a proposed alternative grease removal system for attaining FOG protection for the POTW. The food service establishment shall demonstrate through data and other reliable information that the proposed alternative system, its overall design, including size and location, will satisfy and result in compliance with the intent, and discharge requirements, of this chapter. The design plans must be signed and sealed by a Washington State licensed professional engineer with experience in interceptor design. If approved, the design professional must certify that the site plan and the alternative grease removal system design meets the intent, and discharge requirements, of this chapter. In no case shall a variance result in violation of any pretreatment standard or requirement specified in this chapter and applicable to the discharge, cause or contribute to, an obstruction, pass through or interference with the POTW.
b. 
A variance may be revoked if the Control Authority determines, in its sole and reasonable discretion, that the food service establishment is in violation of the conditions set forth in the variance, the request for a variance was procured through fraud or materially false information, the reasons for granting the variance have materially changed, or the conditions set forth in the variance are inadequate to control specific pollutants as necessary to meet the purpose and intent of this chapter.
c. 
If a variance is granted, the food service establishment shall implement the approved alternative grease removal system and any BMPs and other mitigation measures that may be specified by the Control Authority. These BMPs may include, but are not limited to:
(1) 
Allowing the installation of a Hydromechanical Grease Interceptor (HMGI), or continuing to allow the use of a HMGI in lieu of installing a GGI, where the HMGI is shown to be effective. If a HMGI is not shown to be effective, the Control Authority may require the food service establishment to install a GGI;
(2) 
A requirement that all sinks and drains which are connected to the POTW be equipped with a fixed or removable mesh or screen which shall catch garbage and food debris and prevent it from entering the POTW;
(3) 
A requirement that biological treatment or enzyme treatment shall not be used unless approved by the Control Authority. Use of enzymes or other chemical or biological treatment or product that emulsifies or acts to emulsify FOG is prohibited;
(4) 
If requested by the Control Authority, an employee training program on FOG waste management instituted by the food service establishment on a periodic basis and for all new employees;
(5) 
A requirement that the food service establishment clean its private side sewer quarterly to prevent the buildup of FOG or as otherwise specified by the Control Authority; and
(6) 
A requirement that the food service establishment submit records of the private side sewer cleaning if requested by the Control Authority.
(Ord. 28761 Ex. C, 2021-05-25)
A. 
Best management practices for the acceptance of hauled waste. The requirements established in this section shall apply to haulers. If the Control Authority elects to accept hauled waste, the following conditions shall apply:
1. 
Hauled wastes may be discharged to the POTW only at locations and at such times designated by the Control Authority;
2. 
The Control Authority shall have the right to refuse the discharge of any hauled waste load to the POTW if the Control Authority determines, in its sole discretion, that such discharge may contribute to or cause a pass through, upset or interference with the POTW, may damage or cause harm to the POTW, contains constituents that are unknown or unverified, may not comply with applicable pretreatment standards, pollution limitations or requirements set forth in this chapter, or that the discharge will not meet the purpose and intent of this chapter;
3. 
Haulers are prohibited from discharging wastes that would violate any provision in TMC § 12.08C.100;
4. 
Haulers shall comply with specific pollutant limitations established by the Control Authority under this chapter which are specific to the hauled waste to be discharged;
5. 
The Control Authority may sample and analyze the hauled wastes or require the hauler to perform such sampling and analysis to verify that each hauled load complies with any applicable pretreatment standards and requirements regulated by this chapter. Wastes approved for discharge to the POTW shall be representative of what the hauler disclosed in the manifest or trip ticket. The Control Authority may sample and analyze the contents of any hauled waste tank or container prior to the discharge of hauled waste to the POTW to determine compliance with the conditions of any discharge approval granted under this chapter. The Control Authority may assess and collect a charge to recover such sampling and analytical costs as a pre-condition to determining if a discharge will be authorized;
6. 
The Control Authority may require haulers to sample and analyze hauled waste, including at the location where the hauled waste is generated;
7. 
Haulers shall receive prior approval from the Control Authority prior to discharging hauled waste to the POTW. The Control Authority may require a hauler to obtain a control mechanism prior to discharging hauled waste to the POTW;
8. 
Haulers shall notify the Control Authority of any new commercial or industrial customers, or changes in the nature of hauled waste originating from existing customers;
9. 
The Control Authority may restrict the maximum number of loads that a hauler may discharge during a specific period of time, and the discharge rate and volume of each load;
10. 
If requested by the Control Authority, a hauler shall provide a manifest form or similar trip ticket for every load prior to discharging hauled waste to the POTW. The manifest form or ticket shall include, at a minimum:
a. 
The name and address of each customer or source of waste;
b. 
The permit number;
c. 
The truck identification;
d. 
The volume of wastewater from each source;
e. 
The type of waste to be discharged;
f. 
Known or suspected pollutants present in load(s);
g. 
Signatory Certification; and
h. 
Certification that the hauled waste is not hazardous;
11. 
The Control Authority may impose rates and fees for hauled wastes as established by ordinance or resolution of the City Council;
12. 
Haulers shall maintain tanks, pumps, valves, hoses, racks, cylinders, diaphragms, pipes, connections, and other appurtenances on a vehicle in good repair to avoid leaks and spills at discharge locations designated by the Control Authority;
13. 
Hauled waste disposed of to the POTW shall only be disposed of at a location designated by the Control Authority;
14. 
Each hauler shall maintain its hauled waste vehicle to prevent leaks and spills at the designated discharge location. Any leaks or spills shall be promptly cleaned up by the hauler causing such leak or spill;
15. 
The Control Authority may require haulers to obtain a performance bond in an amount as specified by the Control Authority as a condition of discharging hauled waste to the POTW. When required, proof of bonding, in a form acceptable to the City Attorney, shall be provided to the City prior to discharging hauled waste to the POTW; and
16. 
The Control Authority may revoke or suspend the authorization to discharge hauled waste when the Control Authority has determined that a hauler has violated any provision of this chapter or when it determines that revocation or suspension is necessary to protect the POTW.
(Ord. 28761 Ex. C, 2021-05-25)
A. 
Best Management Practices for Dental Facilities.
1. 
Applicability. These BMPs apply to dental dischargers. Dental dischargers are not significant industrial users unless designated as such by the Control Authority. Dental dischargers are not categorical industrial users. These BMPs do not apply to dental dischargers that:
a. 
Exclusively practice one or more of the following dental specialties: oral pathology, oral and maxillofacial radiology, oral and maxillofacial surgery, orthodontics, periodontics, or prosthodontics;
b. 
Discharge wastewater from a mobile unit operated by a dental discharger;
c. 
Do not discharge any amalgam process wastewater to the POTW (e.g., a dental discharger that collects dental amalgam process wastewater for transfer to a centralized waste treatment facility as defined in 40 CFR Part 437); and
d. 
Do not place or remove dental amalgam except in limited emergency or unplanned, unanticipated circumstances that are reported and certified to the Control Authority as required in 40 CFR Section 441.50.
2. 
Reporting.
a. 
The duly authorized representative of a dental discharge facility shall submit a dental user survey and certification to the Control Authority on a form provided by the Control Authority.
b. 
A new source dental discharger shall submit the dental user survey and certification within ninety (90) days of discharge to the sanitary sewer system.
c. 
A dental discharger existing on the effective date of the ordinance adopting this chapter, shall submit the dental user survey and certification to the Control Authority by October 12, 2020.
d. 
Exempt dental dischargers shall submit the dental user survey and certification by October 12, 2020, or within ninety (90) days of operation if a new facility.
3. 
Amalgam Separator Requirements.
a. 
A new source dental discharger shall install, operate, and maintain an amalgam separator or device compliant with 40 CFR Section 441.30 prior to discharge to the POTW.
b. 
All dental facilities that discharge amalgam process wastewater to the POTW shall install an amalgam separator or device and implement the required best management practices in accordance with this section.
c. 
Existing source dental dischargers shall install, operate, and maintain an amalgam separator compliant with 40 CFR Section 441.30 by July 14, 2020. Existing facilities with non-compliant amalgam separators shall comply by June 14, 2027, unless replaced earlier due to malfunction.
4. 
Amalgam Separator Required Best Management Practices.
a. 
All amalgam separators required under this chapter shall meet and comply with the following BMPs:
(1) 
The amalgam separator shall be compliant with 40 CFR Section 441.30(1) and certified to meet at least a 95% solids removal efficiency as specified by federal or state regulations per 40 CFR Section 441.30(1)(i);
(2) 
The amalgam separator shall allow the dental discharge facility to make direct observations as to the level of solids in the collection container, proper solid and liquid separation, and the condition of all plumbing connections;
(3) 
The amalgam separator shall be installed so that all amalgam contaminated wastewater passes through the unit before being discharged to the POTW;
(4) 
The amalgam separator shall be installed so that it is accessible for cleaning and inspection;
(5) 
The amalgam separator shall be serviced at a minimum of once every twelve (12) months, in accordance with the manufacturer’s instructions or more frequently if visual inspections indicate that the level of solids is at or over 85% of the recommended maximum level, whichever is more stringent; and
(6) 
Amalgam waste removed from the amalgam separator shall be collected and handled in accordance with the manufacturer’s instructions and applicable federal and state regulations, and local ordinances.
b. 
Each dental discharge facility shall ensure dental amalgam wastestreams from chair side traps, screens, vacuum pump filters, dental tools, cuspidors, or collection devices discharge through an appropriate amalgam separator.
c. 
Each dental discharge facility shall operate and maintain all equipment in accordance with the manufacturer’s instructions.
d. 
Each dental discharge facility shall use disinfecting line cleaners that are non-acidic and non-oxidizing with a pH between 6-8 Standard Units. Prohibited cleaning chemicals include but are not limited to: bleach; chlorine; iodine; and peroxide chemicals and other oxidizing cleaners.
e. 
All water containing amalgam waste shall be plumbed through the amalgam separator. When cleaning, ensure all filters or traps are rinsed over sinks or drains that discharge to the amalgam separator.
f. 
The dental discharge facility shall not cause or contribute to pass through or interference, or violate TMC § 12.08C.100.
5. 
Record keeping. All records required pursuant to this chapter shall be kept on site for a minimum of three (3) years, unless a longer retention period is specified in writing by the Control Authority, and shall be made available to the Control Authority as required by this chapter. Each dental discharge facility shall maintain records of:
a. 
Amalgam disposal. Records shall include the date, name and address of the facility where amalgam waste is shipped, and the amount shipped;
b. 
Visual inspections. Inspection logs shall include the date and time of the visual inspection, name and initials of person conducting the inspection, level of solids, maintenance needed, or other identified problems (e.g., leaks); and
c. 
Amalgam separator. Records shall include all maintenance and service completed on the amalgam separator.
6. 
Business modifications. The owner and operator of a dental discharge facility shall inform the Control Authority in writing prior to:
a. 
Sale or transfer of ownership of the dental discharge facility;
b. 
Change in the trade name under which the dental discharge facility is operated;
c. 
Change in the nature of the services provided at the dental discharge facility that affects the potential to discharge amalgam; and
d. 
Remodel of the dental discharge facility that may result in an increase in flow or pollutant loading or that otherwise requires the owner or operator of the dental discharge facility to submit plans or specifications for approval through a building, land use, permitting or zoning department, or any other formal approval process by the City.
7. 
Inspections and data collection. The Control Authority may conduct inspections as authorized by this chapter, and/or require an additional or updated dental user survey for any dental discharge facility.
(Ord. 28761 Ex. C, 2021-05-25)