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HomeMy WebLinkAbout~Master - Fats, Oils and Grease Control Ordinance Revisions ORDINANCE NO.4263 AN ORDINANCE TO AMEND THE MUNICIPAL CODE OF THE CITY OF AMES, IOWA, BY REPEALING SECTIONS 28.302(5),(18),(19), (20), 28.304(1), 28.304(8)(D), (11), 28.306 (11), 28.308 , APPENDIX Q, HIGH- STRENGTH SURCHARGE RATES AND RESTAURANT SURCHARGE AND ENACTING A NEW SECTIONS 28.302(5),(18),(19), (20), 28.304(1), 28.304(8)(D), (11), 28.306 (11), 28.308, APPENDIX Q, HIGH-STRENGTH SURCHARGE RATES AND RESTAURANT SURCHARGE THEREOF, FOR THE PURPOSE OF FATS, OILS AND GREASE REVISIONS; REPEALING ANY AND ALL ORDINANCES OR PARTS OF ORDINANCES IN CONFLICT TO THE EXTENT OF SUCH CONFLICT; AND ESTABLISHING AN EFFECTIVE DATE. BE IT ENACTED,by the City Council for the City of Ames, Iowa,that: Section One. The Municipal Code of the City of Ames, Iowa shall be and the same is hereby amended by repealing Sections 28.302(5),(18),(19),(20),28.304(1),28.304(8)(D), (11),28.306(11),28.308 and enacting a new Sections 28.302(5),(18),(19),(20),28.304(l),28.304(8)(D),(11),28.306(11),28.308 as follows: "See.28.302. DEFINITIONS. (5) `Normal Domestic Wastewater' shall mean,for the purposes of surcharge Program implementation,wastewater that has constituent concentrations at or below the values shown in the following table, expressed in milligrams per liter(mg/L). Constituent Concentration,mg/L Oxygen Demand CBODS 250 COD 550 Nitrogen NH3-N 30 TKN 45 Solids TSS 300 Fats, Oils, and Grease Oil and Grease 300 (18) `FOG' (denoting Fats, Oils, and Grease) shall mean organic polar compounds derived from animal and/or plant sources that contain multiple carbon chain triglyceride molecules. These substances are detectable and measurable using analytical test procedures in 40 CFR 136, as may be amended from time to time. All are sometimes referred to herein as"grease","greases", and"oil and grease". (19) `FSE' (denoting Food Service Establishment) shall mean a food establishment required to hold a Food Service Establishment License or Mobile Food Unit License from the Iowa Department of Inspections and Appeals. FSE shall not mean an establishment which is only required to hold a Food Processing Plant License or Retail Food Establishment License from the Iowa Department of Inspections and Appeals. (20) `Grease Interceptor' shall mean a tank that serves one or more fixtures and captures wastewater from garbage disposals, floor drains,pot and pan sinks and trenches as allowed by local plumbing codes. Dishwashers may in some instances also be connected to a grease interceptor as allowed by local plumbing codes. A grease interceptor reduces the amount of FOG in wastewater prior to its discharge into the POTW and may be a gravity-flow grease interceptor located underground or a hydromechanical grease interceptor located within a building. See.28.304. SEWER RATES ESTABLISHED. (1) Each user shall pay for the services provided by the City based on its use of the treatment works as determined by water meter readings or other appropriate methods acceptable to the City. (8) (d) The sewer service charge will be billed only on the difference between the water meter reading and the yard meter reading. (11) For those users which operate Food Service Establishments licensed by the State of Iowa, a Restaurant Surcharge, Restaurant Fee, or High-Strength Surcharge Rate, in addition to the normal user charge, shall be collected. The Restaurant Surcharge, Restaurant Fee, and High-Strength Surcharge Rate shall be listed in Appendix Q. (a)Users which are billed for sewer usage shall be assessed the Restaurant Surcharge. (b) Users which are not billed for sewer usage or whose sewer usage is not representative of the facilities food service activities shall be assessed the Restaurant Fee. (c)Users whose sanitary sewer discharge flows through an outfall monitored by the City of Ames Non-Domestic Waste Pretreatment Program shall be assessed a High-Strength Surcharge Rate that includes the surcharge for Oil and Grease as calculated based on their sampling results. See. 28.306. GENERAL PROHIBITIONS FOR WASTE DISPOSAL IN THE SEWER. (11) Any additive or emulsifier designed for the purpose of reducing the accumulation of Fats, Oils, and Grease in plumbing, grease interceptor equipment, or the POTW, except those additives or emulsifiers that have been approved for such use by the Director of Water and Pollution Control. Sec.28.308 FATS,OILS,AND GREASE CONTROL PROGRAM. The purpose of this section shall be to aid in the prevention of sanitary sewer blockages and obstructions from contribution and accumulation of Fats, Oils, and Grease (FOG) into the POTW. Such discharges from commercial kitchens, restaurants, and all other food service establishments, where FOG of vegetable or animal origin is discharged directly or indirectly into the POTW, can contribute to line blockages and/or spills in violation of Title 40,Code of Federal Regulations 40 CFR,Part 403,as it may be amended from time to time. (1) Any customer which operates a Food Service Establishment or Mobile Food Unit licensed by the state of Iowa, and which is connected to the City's Treatment Works, shall be subject to the FOG Control Program. (2) Any costs for compliance with the regulations set forth in the FOG Control Program shall be the responsibility of the customer. (3) FSEs subject to the FOG Control Program may apply for exemption from the Restaurant Surcharge. Exemptions shall utilize evidence gathered in the preceding six(6)month period to determine whether an FSE is exempt from the Restaurant Surcharge for sewer bills mailed during the following six (6) month period. Exemption periods shall be from January to June and from July to December. (4) The use of any additive into a grease interceptor, grease trap,or other on-premise plumbing for the purpose of "treating" FOG shall be prohibited unless prior approval is granted by the Director of Water and Pollution Control. (a) FSE's who wish to use any additives must submit a request in writing. Each site wishing to use a product must obtain separate approval. Approval is not granted to use any product unless and until written approval is granted by the City. (b) A Safety Data Sheet(SDS)must be submitted to the Director for approval of the product. The SDS,or other information submitted,must identify all active and inactive ingredients of the products. Materials that include"confidential"or"proprietary"components will not be approved. (c) To be approved, products must be composed of non-emulsifying active biological additives designed to decompose the grease in the grease trap or grease interceptor. (i) Products that serve to simply"disperse" FOG, or that act by allowing FOG to be more easily discharged from FOG control devices will not be approved. (ii) Examples of products that are not approved are those that include, but are not limited to,the following types of components: (a) Enzymes (b) Solvents (c) Surfactants (d) Dispersants (e) Other products that act on grease"chemically" as opposed to"biologically" (f) Other components that are deemed to be otherwise incompatible with the purpose of the FOG control program or the municipal sewerage system as described in Section 28.306. (d) Approval of a product may be revoked by the Director if pass-through of FOG or other problems in the collection system of treatment plant occurs. (e) Aeration, agitation, or stirring of grease traps or grease interceptors shall not occur at any time. (f) Approval of any additive shall not be construed as approval to modify any plumbing. Any changes or modifications necessary shall be conditioned upon receipt of a plumbing permit from the City. (g) Approval of any additive shall not be construed as an endorsement by the City of the effectiveness of the product. The FSE assumes all responsibility for the performance and effectiveness of the product. (h) Servicing frequencies for grease control equipment must still comply with the other requirements of this ordinance. (i) Should the make-up or composition of any approved product change, a new approval must be granted by the Director. (5) The Director of Water and Pollution Control, or designee, may exempt an FSE from the Restaurant Surcharge/Restaurant Fee for a six (6) month period if one of the following criteria is met during the preceding six(6)month period: (a) Submission of records of grease interceptor cleanings occurring in the previous six (6) months. If a grease interceptor is not cleaned during the previous six (6) months, the reason(s) for this must be submitted to and approved by the Director of Water and Pollution Control or designee. Such records shall include the following information: (i) The name and employer of the individual performing the grease interceptor cleaning(s). (ii) The date(s) on which grease was removed from each grease interceptor controlled by the customer. (iii) The quantity of grease removed during each cleaning. (a) In the case of a gravity-flow grease interceptor, the quantity of grease shall be calculated by comparing the depth of the floating fats, oils, and grease, plus the depth of the accumulated solids, and dividing that depth by the total depth of the unit(the design liquid level), expressed as a percentage. The measurements shall be taken in the compartment nearest the inlet of a multi-compartment grease interceptor and in the first interceptor when more than one interceptor is installed in series. In instances where an interceptor requires cleaning multiple times during the six (6) month review period, records shall be submitted for each cleanout. The owner or operator of the FSE shall require the grease interceptor to be cleaned when FOG and solids reach 25%or less of the design liquid level of the grease interceptor. When multiple cleanouts are required during a review period, the level of FOG and solids from each cleanout shall average 25% or less and no single instance shall equal or exceed 35%. (b) In the case of a hydromechanical grease interceptor, the quantity of grease shall be calculated by comparing the depth of the floating fats, oils, and grease, plus the depth of the accumulated solids, and dividing that depth by the total depth of the unit (the design liquid level), expressed as a percentage. The measurements shall be taken in the compartment nearest the inlet of a multi-compartment grease interceptor. In instances where an interceptor requires cleaning multiple times during the six (6) month review period, records shall be submitted for each cleanout. The owner or operator of the FSE shall require the grease interceptor to be cleaned when FOG and solids reach 25%or less of the design liquid level of the grease interceptor. When multiple cleanouts are required during a review period, the level of FOG and solids from each cleanout shall average 25%or less and no single instance shall equal or exceed 35%. In situations where a hydromechanical grease interceptor is not able to be measured prior to cleanout, it shall be required that the interceptor be cleaned on a monthly basis. (iv) Verification that the place of disposal of hauled grease is a facility designed for such a purpose and is licensed or certified in accordance with local, state, and federal regulations, as appropriate. (v) Verification that the method of transporting hauled grease is appropriate for such a purpose and complies with local, state, and federal regulations, as appropriate. (vi) Verification that any grease interceptor from which grease is removed is inspected and found to be in proper working order. This inspection shall include verification that the sanitary"tees" on the inlet and outlet sides of the grease interceptor are not obstructed, loose, or missing, verification that any baffles are secure and in place, verification that no cracks or defects in the tank are present, and verification that lids are securely and properly seated following completion of the cleaning. If any component of the grease interceptor is not in proper working order,records shall indicate what defect(s) exist and when, how, and by whom such defect(s) are remedied. (b) Submission of a laboratory test to determine the oil and grease content of typical wastewater discharge. Such tests shall be conducted by a laboratory certified by the State of Iowa to test oil and grease under the procedures specified in Chapter 567.83 of the Iowa Administrative Code. Laboratory tests shall conform to the following conditions: (i) The sample shall be obtained by use of a"grab sampling" method, in which the sample flask is held under a free-flowing outfall of water from a sampling port designed for such uses. (ii) Staff of the Water Pollution Control Department shall select the date and time during which a sample may be obtained, the timing of which shall be selected to coincide with a peak customer demand. (iii) The sample shall not exceed 300 mg/L oil and grease. (c) Submission of kitchen Best Management Practices records that detail the grease control activities in the FSE. Such records shall be spot-checked for compliance by the Water and Pollution Control Department staff. The records shall at all times be kept and maintained on a day-to-day basis, and records shall be kept secure at the premises of the FSE for a continuous period of at least three years.The records shall document the following activities: (i) Each cleaning of the FSE's grease interceptor(s). The FSE shall be required to meet the same requirements as are defined in Sec.28.308(5)(a). (ii) Training held for the FSE's staff regarding practices that will reduce the introduction of FOG into the sanitary sewer. (iii) Self-inspection for presence and proper use of drain screens, clean and grease- free nature of exhaust hood equipment, and presence of spill clean-up kits, warning signage over sinks regarding FOG practices, and informational posters regarding FOG. (iv) Records of the date, time, quantity, and location of introduction of any additive. A copy of the approval granted by the Water and Pollution Control Department shall be kept with the logbook. (v) Any other activities undertaken by the FSE's staff to prevent or mitigate the introduction of FOG into the Treatment Works or into the environment. (6) (a) Cleaning of a hydromechanical grease interceptor may be performed by food service establishment staff. Documentation of any cleaning must include all information required for compliance with the FOG Control Program. (b) Cleaning of a gravity-flow grease interceptor must be performed by a contractor that specializes in the disposal of restaurant grease. (7) The Director of Water and Pollution Control may, upon finding evidence of accumulated FOG in the Treatment Works, authorize an inspection of any FSE that may reasonably be believed to have introduced that accumulation of FOG. Such inspection may occur at any reasonable time and without prior notification. Inspections shall be limited to the equipment and practices related to the introduction of FOG and waste water into the Treatment Works. The FSE shall allow the individual performing this inspection, bearing proper credentials and identification, to enter upon or into the building, facility, or property housing the FSE for the purpose of inspection, observation, measurement, sampling, testing, or record review. Upon request of the individual performing the inspection, the FSE shall open any grease interceptor for the purpose of confirming that maintenance frequency is appropriate, that all necessary parts of the installation are in place, and that all grease interceptors and related equipment and piping are maintained in efficient operating condition. Inspections may be undertaken as many times as necessary to identify the source of FOG entering the Treatment Works. Section Two. The Municipal Code of the City of Ames, Iowa shall be and the same is hereby amended by repealing Appendix Q, High-Strength Surcharge Rates and Restaurant Surcharge and enacting a new Appendix Q, High-Strength Surcharge Rates and Restaurant Surcharge as follows: High-Strength Surcharge Rates Parameter Surcharge Rate Oxygen Demand CBODS $0.41/lb. COD $0.15/lb. Nitrogen NH3-N $1.44/lb. TKN $0.93/lb. Solids TSS $0.60/lb. Fats,Oils,and Grease Oil and Grease $0.84/lb. Restaurant Surcharge Restaurant surcharge on sewer use for customers operating Food Service Establishments $2.54/100 cubic ft. Restaurant Fee Restaurant fee for sewer use for customers operating Food Service Establishment which are not billed for sewer usage or whose sewer usage is not representative of the facilities food service activities. $75.00/month." Section Three. All ordinances, or parts of ordinances, in conflict herewith are hereby repealed to the extent of such conflict,if any. Section Four. This ordinance shall be in full force and effect from and after its passage and publication as required by law. ADOPTED THIS 28`h day of June,2016. Diane R. Voss,City Clerk Ann H.Campbell,Mayor 100,