Chapter 14.09
BOD, TSS AND FOG CONTROL
Sections:
14.09.010 Pretreatment of fats, oils and greases (FOG) required.
14.09.020 Requirements for BOD, TSS and FOG content.
14.09.030 Existing dischargers.
14.09.050 Retrofitting required.
14.09.060 Required periodic testing.
14.09.080 Washing facilities, grease rack – Pretreatment.
14.09.090 FOG pretreatment facilities – Installation and maintenance.
14.09.120 Approved FOG reduction program.
14.09.130 Pretreatment device where installed.
14.09.140 Temperature control.
14.09.150 Grinders discharging into interceptors prohibited.
14.09.180 Screening of drains.
14.09.200 Shopping center type facilities.
14.09.210 New garbage grinders prohibited.
14.09.010 Pretreatment of fats, oils and greases (FOG) required.
(1) Establishments Required to Meet Requirements. The following uses shall meet the requirements of this chapter whether or not they are otherwise required by state or federal law to engage in pretreatment actions:
(a) Restaurants, school kitchens, cafes, butcher shops, delicatessens, lunch counters, cafeterias, bars, hospitals, nursing homes, senior centers, hotels with dish washing capabilities;
(b) Hotels, grocery stores, factories, or other establishments that prepare, serve or sell food or related cleanup, where grease may be introduced to the sewer system.
(2) Restaurants with occupancies of 50 or more persons shall have an interceptor and not a grease trap unless there is no place on the property to install an interceptor. If there is no place on the property for an interceptor, the restaurant shall have an adequately sized grease trap(s).
(3) Exceptions to required pretreatment of FOG are restaurants, delicatessens, grocery stores, lunch counters, cafeterias, bars, clubs, hotels, hospitals, sanitariums, factories or school kitchens which meet all of the following criteria:
(a) Do not do any preparation or cooking of meats and do no food cleanup of any sort; or
(b) Which only use prepackaged foods and serve beverages. (Ord. 1004, 1995).
14.09.020 Requirements for BOD, TSS and FOG content.
The dischargers identified in OHMC 14.09.010 shall:
(1) Meet standards for discharge in Section 14.07.010 and 14.07.040; provided, they may exceed BOD and TSS standards by up to four times those amounts set out so long as:
(a) They pay surcharges under OHMC 14.05.040;
(b) There is an agreement with the supervisor to do so;
(c) They have an approved FOG reduction program;
(d) They are not in violation of the standards in OHMC 14.07.010;
(2) Have grease/oil interceptors adequately sized to assure that FOG limitations of this title are met;
(3) Not have garbage grinders which discharge into the OHSS;
(4) Keep records of pretreatment facility cleaning, FOG reduction program if required to on FOG interceptor, grease trap or other pretreatment device;
(5) Post signage as required in OHMC 14.09.120 which gives instructions for FOG reduction programs;
(6) (If a restaurant of over 50-person occupancy) have a sampling facility on site and an intercepter installed;
(7) Where applicable, meet other provisions of this chapter. (Ord. 1004, 1995).
14.09.030 Existing dischargers.
Existing dischargers shall not be required to remove garbage grinders which discharge into the OHSS or install interceptors if all of the following conditions are met:
(1) An adequately sized grease trap or interceptor is in place;
(2) The discharger is meeting BOD, FOG, TSS requirements;
(3) The discharger engages in an approved FOG reduction program;
(4) The discharger does not singly or in combination with others cause a line cleaning or blockage problem in sewer lines of the OHSS. For example, the lines do not have to be cleaned more than once every three years;
(5) The discharger does not singly or in combination with others cause a NPDES permit compliance problem for the OHSS;
(6) Maintenance of interceptor is done by a certified maintenance provider on a regular schedule determined by the city supervisor with results mailed directly to the city yearly. (Ord. 1004, 1995).
14.09.040 Grease traps.
Businesses listed in OHMC 14.09.010 which are not required to have interceptors and which are not specifically excepted shall have adequately sized grease traps and shall follow an approved FOG, TSS and BOD reduction program. (Ord. 1004, 1995).
14.09.050 Retrofitting required.
If the supervisor determines that conditions of OHMC 14.09.030 are not met, the supervisor shall require removal of grinder or the installation of FOG interceptor or both such actions. Procedures and enforcement actions shall be as set out in Chapters 14.11 and 14.13 OHMC. (Ord. 1004, 1995).
14.09.060 Required periodic testing.
Supervisor may require periodic testing of effluent by businesses listed in OHMC 14.09.010 when the supervisor has a reasonable belief that the business is not meeting treatment standards because:
(1) The city has determined the business is probably not meeting effluent standards by testing down stream; or
(2) There is evidence of FOG build-up downstream probably caused by this discharger singly or in combination with other businesses; or
(3) The discharger records are incomplete, false or not made available for inspection; or
(4) There is evidence of tampering with pretreatment equipment; or
(5) There is evidence of use by the discharger of degreasers, “enzymes” or other chemicals which keep grease in suspension past the grease trap or interceptor; or
(6) Other reasons established by facts which warrant a belief that the applicable discharge standards under Chapter 14.07 OHMC are violated. (Ord. 1004, 1995).
14.09.070 Testing procedures.
Testing to be performed in this chapter shall consist of the following procedure: Three grab samples per day be obtained each day for three consecutive days. The three daily grab samples be physically composited (blended) and transported to the laboratory for analysis. Each grab sample should be obtained no less than 20 minutes apart from the other two grab samples. This procedure should be followed on three successive days, and the average of the three-day values averaged for purposes of determining compliance.
The sampling process can occur on any three days of the month, but should be selected on a random basis from month to month.
Testing by the city shall be paid for by the discharger if the discharger is in violation.
Testing shall be conducted by a certified testing facility.
All samples should be obtained so as to include any ground vegetable matter as part of the suspended solids concentration and BOD determinations. (Ord. 1004, 1995).
14.09.080 Washing facilities, grease rack – Pretreatment.
Dischargers who operate automatic and coin-operated laundries, car washes, filling stations, commercial garages, car sales lots, or similar businesses having any type of washing facilities or grease racks and any other dischargers producing grit, sand, oils, or other materials which have the potential of causing partial or complete obstruction of the building, sewer or other areas in the sewer system shall install approved interceptors or tanks in accordance with the latest specifications adopted by the city such that excessive amounts of oil, sand and inert solids are effectively prevented from entering the city sewer. (Ord. 1004, 1995).
14.09.090 FOG pretreatment facilities – Installation and maintenance.
All grease traps and interceptors, oil/water separators, settling tanks and grit traps shall be installed, maintained and operated by the discharger at the discharger’s own expense. The installation shall be kept in continuous operation at all times, and shall be maintained to provide efficient operation. Cleaning of FOG interceptors or oil/water separators must be performed by a person qualified to perform such cleaning. All material removed shall be disposed of in accordance with all state and federal regulations. Certification of maintenance shall be made readily available to the city authorized personnel for review and inspection. If a failure to maintain settling tanks, grit traps, grease interceptors, or oil/water separators results in partial or complete blockage of the building sewer or other parts of the waste water utility system, adversely affects the treatment or transmission capabilities of the system, or requires excessive maintenance by the city, the discharger responsible for the facilities shall be subject to the remedies, including enforcement and penalties detailed in this chapter or Chapters 14.11 and 14.13 OHMC.
(1) The supervisor shall have the right to set up on the user’s property, or require installation of, such devices as are necessary to conduct sampling or metering or both metering and sampling of the user’s operations.
(2) Any temporary or permanent obstruction to safe and easy access to the facility to be inspected or sampled or both shall be promptly removed by the user at the written or verbal request of the supervisor and shall not be replaced. The costs of clearing such access shall be born by the user.
FOG interceptor shall be pumped on a regular cycle sufficient to assure that excess FOG discharges into the OHSS do not occur. The schedule need be no more than twice a year unless interference with the OHSS occurs or slug load discharges occur. (Ord. 1004, 1995).
14.09.100 Right of revision.
The city reserves the right to amend this chapter, and any permits issued under it, to provide for more stringent limitations or requirements on discharges to the OHSS if such amendments are deemed necessary to comply with the objectives set forth in this title, or are otherwise in the public interest. No vested right shall be created by the issuance of any permit under this chapter. (Ord. 1004, 1995).
14.09.110 Signage.
There shall be posted in each business adjacent to sinks signs describing best management practices and identification of forbidden acts. (Ord. 1004, 1995).
14.09.120 Approved FOG reduction program.
(1) Businesses identified in OHMC 14.09.010 shall start and maintain an approved FOG reduction program.
(2) An approved FOG reduction program includes:
(a) Posting of approved signage;
(b) Education of all employees on proper FOG disposal practices;
(c) Use of a certified cleaning service to clean the FOG interceptor at scheduled cleaning times set by the supervisor or an alternative approved cleaning process approved by the supervisor;
(d) Accurate records kept of interceptor or grease trap cleaning and FOG reduction program;
(e) The supervisor may require as part of a FOG reduction program an approved FOG recycling program and that accurate records are kept of amounts recycled and listing the carrier or carriers which pick up the FOG for recycling, including amounts originally purchased. Such requirement shall be imposed only if it is determined that restaurant has been discharging FOG in excess of the permissible limits set in this chapter. (Ord. 1004, 1995).
14.09.130 Pretreatment device where installed.
FOG traps or interceptors required under this chapter must be installed in the waste line leading from sinks, drains, or other fixtures where grease may be discharged. The FOG interceptors must meet, at a minimum, the specifications of the current Uniform Plumbing Code and International Building Code adopted by the city at the time of construction. The administrative authority is authorized to adopt and publish additional criteria for FOG interceptors.
Dischargers must maintain these facilities in a manner that will always prevent fat waste, oil or grease removed from such a facility to not be disposed of in sanitary or storm sewers. (Ord. 1381 § 2, 2004; Ord. 1004, 1995).
14.09.140 Temperature control.
No dishwasher shall discharge directly into a grease trap or interceptor unless the water is cooled to 104° F. The use of cooling water shall be an exception to dilution prevention provisions of this title. (Ord. 1004, 1995).
14.09.150 Grinders discharging into interceptors prohibited.
Unless specifically required or permitted by the supervisor, no food waste disposal shall be connected to or discharged into any grease trap or interceptor unless floor drains are properly screened or through a scrap separator with one-quarter inch screening as approved by the supervisor. No toilets may discharge into an interceptor. (Ord. 1004, 1995).
14.09.160 Signage.
All businesses identified in OHMC 14.09.010 shall post signage, approved by the supervisor, describing approved methods and prohibited practices for FOG, BOD and TSS control. (Ord. 1004, 1995).
14.09.170 Recycling.
(1) When a business identified in OHMC 14.09.010 have been found to discharge FOG in excess of the limits set in this title, it shall engage in a recycling program which shall recycle at least 50 percent of fats, oils and grease purchased. Fats, oils and greases which are recycled shall be brought to or picked up by a licensed FOG recycling service.
(2) The business shall maintain records of the recycling done and request the recyclers to provide the city with records of dates and amounts of FOG recycled. (Ord. 1004, 1995).
14.09.180 Screening of drains.
Screens on drains required by UPC and other devices shall be maintained and kept in proper working order. (Ord. 1004, 1995).
14.09.190 Tampering.
It shall be unlawful for any one to tamper with, change or modify a pretreatment device required under this chapter. (Ord. 1004, 1995).
14.09.200 Shopping center type facilities.
Commercial properties developed into shopping centers with more than one commercial space available on-site shall provide spaces for on-site interceptors. (Ord. 1004, 1995).
14.09.210 New garbage grinders prohibited.
No garbage grinder which directly or indirectly discharges into the OHSS shall be installed for any residents, commercial or industrial use after the date of the ordinance codified in this title. (Ord. 1004, 1995).