Section
52.01 Statement of policy
52.02 Grease interceptors; design of grease interceptors
52.03 Internal grease traps; design of internal grease traps
52.04 Plan submittal requirements; procedures
52.05 Permit; FOG discharge permit
52.06 Establishment responsibilities
52.07 Monitoring, inspection and entry
52.08 Violation
52.99 Penalty
Appendix A: Grease interceptor and grease trap sizing
Appendix B: Best management practices
Appendix C: Forms
Appendix D: Definitions
Appendix E: Discharge permit
(A) Fats, oil and grease (FOG) in wastewater can result in the decreased carrying capacity of sewers due to congealed, cooled grease which coats the inside of the pipes. Once a pipe becomes constricted, the potential for a blockage increases. Blockages can and will eventually cause sanitary sewer overflows.
(B) The following is the FOG policy for the town’s wastewater treatment utility (utility). The purpose of establishing the FOG policy is to protect public health by eliminating sanitary sewer system overflows due to FOG and reduce the amount of FOG discharged to the sanitary sewer system while reducing maintenance costs for the utility’s customers and improving operation of the collection system. Any wastewater which contains FOG shall only be discharged into the utility’s sanitary sewer system under the conditions of this policy and with a valid FOG discharge permit.
(C) (1) A FOG discharge permit shall be required of any customer of the utility including businesses, institutions or establishments participating in the preparation or service of food, where fats, oil and grease may be discharged into a public sewer, except as provided in division (E) below and in accordance with the schedule provided in division (D) below. Such customers shall obtain a FOG discharge permit from the utility and install a grease interceptor as a condition of wastewater service.
(2) Grease interceptors and, when pre-approved, under-counter or in-floor grease traps, waste oil collection devices or either applicable pretreatment units shall be installed, operated, maintained and repaired solely at the customer’s expense.
(D) Schedule for compliance with the FOG discharge policy.
(1) New construction of any establishment meeting the criteria of division (C) above shall obtain a FOG discharge permit and be in full compliance with its construction requirements before commencing any wastewater discharges to the sanitary sewer system.
(2) Existing structures meeting the criteria of division (C) above due to a change of use shall obtain a FOG discharge permit and be in full compliance with its provisions within six months of issuance.
(3) (a) Existing structures meeting the criteria of division (C) above being renovated or expanded shall obtain a FOG discharge permit and be in full compliance with its provisions within six months of issuance.
(b) Structures being renovated or expanded that already have a FOG discharge permit shall contact the utility to determine if a modification is needed.
(4) Food service establishments in existence prior to the effective date of this policy may be allowed to continue current operations without modifications. However, existing establishments determined, by the utility, to be contributing FOG to the sanitary sewer system in excess of 100 mg/l as total recoverable FOG, are contributing to increased downstream maintenance of the sanitary sewer system, or are contributing to downstream backups or overflows due to grease blockages shall be required to obtain a FOG discharge permit and be in full compliance with the permit provisions within six months of issuance.
(5) Regardless of permit status, establishments contributing to FOG blockages or increased down stream maintenance due to FOG discharge shall also be responsible for costs incurred by the utility to remedy the effect of the establishment’s FOG discharge.
(E) Exceptions.
(1) (a) Establishments meeting the criteria of division (C) above that use disposable service ware (disposable plates, cups, utensils and the like) and have less than 25 seats will not be required to install a grease interceptor; however, such establishments may be required to install grease trap(s). This exception does not apply to wholesalers, commercial kitchens or take-out only establishments. The establishment shall complete and submit a FOG discharge permit questionnaire showing fixtures, seat count and certify usage of disposable service ware and shall comply with all other provisions of the FOG policy.
(b) Exception must be pre-approved by the utility prior to:
1. Construction of a new establishment;
2. Beginning modifications and/or opening of a new establishment in an existing building; or
3. Beginning construction of new seating addition or kitchen expansion of an existing establishment.
(2) A FOG discharge permit shall not be required for single-family residences unless such residences have been converted for commercial food preparation use.
(3) A FOG discharge permit shall not be required for duplexes, triplexes, quadraplexes, or apartment complexes. However, multi-family dwellings which are found to be contributing FOG in sufficient quantities to cause main line blockages or increased maintenance in the sanitary sewer system shall be required to obtain a FOG discharge permit.
(4) Single service kitchens with no food preparation (microwave heating and serve only), and which use only disposal service ware will not be required to install a grease interceptor; however, establishments may be required to install grease a trap(s). The establishment shall complete and submit a FOG discharge permit questionnaire showing number of fixtures, seat count and certify usage of disposable service ware and shall comply with all other the provisions of the FOG policy. Exception must be pre-approved by the utility prior to: construction of new establishment; beginning modifications and/or opening of a new establishment in an existing building; or beginning construction of new seating addition or kitchen expansion of an existing establishment.
(F) (1) The utility reserves the right to waive portions of the FOG policy at its discretion. If a properly-sized grease interceptor cannot be accommodated within the property of existing establishments, a waiver may be requested from the utility. For existing establishments, the establishment shall demonstrate to the satisfaction of the utility that the installation of a grease interceptor would be unfeasible and/or would cause an undue hardship in the utilization of the building as a food service establishment. The establishment seeking the waiver shall submit a written request to the utility detailing the reasons and issues supporting the waiver request. The establishment shall complete and submit a FOG discharge permit questionnaire and shall comply with all other provisions of the FOG discharge policy as well as the best management practices (BMP) of Appendix B. A waiver to the grease interceptor installation requirement shall not relieve the establishment of other FOG policy requirements such as the installation of a grease trap(s) in lieu of a grease interceptor or the use of waste oil barrels to dispose of waste cooking grease as detailed in § 52.06(C).
(2) For any establishment granted a waiver that fails to comply with the provisions of the FOG policy (except as waived) or fails to comply with the BMPs of Appendix B, the utility reserves the right to require the establishment to install a grease interceptor.
(Ord. 2012-20, passed 8-22-2012)
(A) Grease interceptors shall be designed and constructed in accordance with the provisions of the FOG policy and in accordance with the most current edition of the town’s sanitary sewer design and construction standards.
(B) Design and construction shall be approved by the Wastewater Treatment Facilities Superintendent, the Superintendent’s representative or the utility’s authorized engineering representative.
(C) The establishment shall obtain the services of a design professional to prepare site layout, size the grease interceptor and prepare a plan detailing connection to the utility’s sanitary sewer.
(D) The discharge from the following fixtures shall be directed to the grease interceptor: all sinks, dishwashers, floor drains in food preparation and storage areas, food waste grinders and any other fixtures through which grease may be discharged.
(E) Grease interceptors shall be installed on the customer’s property and in a location outside of the customer’s establishment, which provides access for inspection, cleaning and maintenance, including pumping.
(F) Wastewater from sanitary establishments shall not be introduced into the grease interceptor under any circumstances.
(G) Grease interceptors are to be installed at a minimum distance of ten feet from sinks and dishwashers to allow for adequate cooling of wastewater. The influent to interceptors shall not exceed 140°F. The temperature at the flow control device inspection port shall be considered equivalent to the temperature of the influent.
(H) Where food-waste grinders are installed the grease interceptor size shall be increased by 30% of the sizing requirement.
(I) Drains that 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.
(J) All waste shall only enter the grease through the inlet flow control device.
(K) Grease interceptors shall conform to the following criteria when being designed and constructed:
(1) The interceptor’s tank size may be based on design criteria set forth by Bulletin S.E. 13 from the Indiana State Department of Health, latest edition, and as indicated in Appendix A of the FOG policy.
(2) Typical detail is shown on Figure A2.4 in Appendix A of the FOG policy. New in-ground grease interceptors shall be no less than 1,000 gallons total capacity. The maximum capacity of any grease interceptor shall be 1,500 gallons unless advised otherwise by the utility’s authorized engineering representative. Where sufficient capacity cannot be achieved with a single interceptor, installation of multiple grease interceptors in series shall be required.
(3) Grease interceptors must meet a minimum structural design of 150 pounds per square foot for non-traffic installations. For vehicular traffic conditions the grease interceptor shall be designed to withstand H-20 wheel loads.
(4) Grease interceptors shall meet the following standards: ASTM C-1227 (Septic Tanks), C-913 (Pre-cast Concrete Water and Wastewater Structures), ACI-318 (Design) and ASTM C-890 (for establishing Minimum Structural Design Loading).
(5) A licensed design professional will specifically design cast in place grease interceptors.
(6) Prior to installation, the contractor shall submit a shop drawing of the grease interceptor for approval to the Town’s Utility Office, 23 West Jennings Street, Newburgh, IN 47630. The shop drawing shall list “Grease Interceptor for (insert the actual project name here)” as the heading of the drawing. The utility reserves the right to waive the shop drawing requirement.
(7) A utility inspector shall inspect the grease interceptor prior to installation. Contractor shall call (812) 853-7496 24 hours prior to installation.
(8) The grease trap must also be inspected by the utility and approved during installation, prior to backfilling. Contractor shall call (812) 853-7496 24 hours prior to installation.
(9) The utility will not approve a grease interceptor that has not been inspected.
(L) In approving an establishment’s grease interceptor design, the utility does not accept liability for the failure of a system to adequately treat wastewater to achieve effluent quality requirements specified under this policy. It is the responsibility of the establishment to ensure the appropriate level of treatment necessary for compliance with the FOG policy and applicable regulations.
(M) All new commercial buildings, such as malls, strip centers and the like, containing sections designated for commercial enterprise, shall provide a stub-out for a separate waste line for future grease interceptor installation. The designer of such new structures shall consider suitable physical property space and sewer gradient that will be conducive for the installation of an exterior grease interceptor(s) for any flex space contained within the building. Physical property restrictions and sewer gradient shall not be a basis for a waiver to install a grease interceptor after the effective date of this policy.
(Ord. 2012-20, passed 8-22-2012)
(A) Internal grease trap (inside of the building, normally located in the kitchen) installation may be required in association with a grease interceptor waiver. When required by the utility, internal grease traps shall be designed and constructed in accordance with the provisions of the FOG policy and in accordance with the most current edition of the Indiana Plumbing Code.
(B) The establishment shall submit vendor literature for the proposed grease trap which must include the flow rating (in gpm) and grease capacity (in pounds); grease trap detail sheets; kitchen layout drawings showing the location of the grease trap(s) in the drainage plumbing tree and all fixtures; and all grease trap(s) sizing calculations for approval by the Wastewater Treatment Facilities Superintendent, the Superintendent’s representative or the utility’s authorized engineering representative.
(C) An approved grease trap shall be installed in the waste line leading from sinks, drains and other fixtures in establishments where grease may be introduced into the drainage or sewage system in quantities that can affect line stoppage or hinder sewage treatment.
(D) No grease trap shall be installed which has an approved rate of flow of neither more that 55 gallons/minute nor less than 20 gallons/minute.
(E) Each fixture shall be individually trapped, vented and provided with an approved type flow control device.
(F) No water-jacketed grease trap shall be installed.
(G) Each grease trap shall have an approved water seal of not less than two inches in depth or the diameter of its outlet, whichever is greater.
(H) Each grease trap shall have an approved rate of flow, which is not less than that given in Appendix A, division (B) for the total number of connected fixtures.
(I) The total capacity (volume in gallons) of fixtures discharging into any such grease trap shall not exceed two and one-half times the certified flow rate of the grease trap.
(J) Not more than four separate fixtures shall be connected to a grease trap.
(K) Dishwashers shall be connected to a dedicated grease trap unless otherwise approved by the utility and the grease trap shall be sized based on the manufacturer’s discharge flow rate.
(L) Grease trap installation(s) must be inspected and approved by the utility prior to use. Contractor shall call (812)853-7496 to arrange the inspection. The utility will not approve grease trap(s) installations that have not been inspected.
(Ord. 2012-20, passed 8-22-2012)
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