Grease, oil and sand interceptors shall be provided by hotels, restaurants, filling and service stations, laundries, meatpacking plants, woolen mills, milk processing plants, metal fabrication plants, biofuel processing/manufacturing, and other places when it shall be shown by the wastewater supervisor that they are necessary for the proper handling of liquid wastes containing grease, or any flammable wastes, nonbiodegradable material, sand and other harmful ingredients; except, that such interceptors shall not be required for private living quarters or dwelling units, except as required by the supervisor. All interceptors shall be of a type and capacity approved by the sewer supervisor and shall be located so as to be readily and easily accessible for cleaning and inspection.
Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, watertight, and equipped with easily removable covers which, when bolted in place, shall be watertight.
All grease, oil and sand interceptors, when installed, shall be maintained by the owner, at his expense, in continuously efficient operation at all times and shall be cleaned and/or replaced at least once each month.
A. In the maintaining of these interceptors, the owner shall be responsible for the proper removal and disposal by appropriate means of the captured material at no cost or responsibility of the city and shall maintain records of the dates and means of disposal which are subject to review by the supervisor. Any removal and hauling of the collected materials not performed by the owner's personnel must be performed by currently licensed waste disposal firms.
1. Owners who fail to maintain interceptors, shall be invoiced a cleaning fee as set by resolution of the city council for the expense of a public works crew to clean the line.
2. Owners will also be required to submit copies of cleaning records to city hall every sixty (60) days to be checked after noted violation.
B. Interceptors (clarifiers), including grease, oil and sand interceptors (clarifiers), etc., shall be provided when, in the judgment of the supervisor, they are necessary for the proper handling of liquid wastes containing grease, flammable wastes, nonbiodegradable material, solids, acid or alkaline substances or other ingredients harmful to the building drainage system, the public or private sewer or to public or private sewage disposal.
C. The size, type and location of each interceptor (clarifier) or interceptor shall be approved by the supervisor, in accordance with these standards. Except where otherwise specifically permitted, no wastes other than those requiring treatment or separation shall be discharged into any interceptor (clarifier). Wastes in excess of one hundred forty degrees Fahrenheit (140°F) (60°C) shall not discharge into a grease interceptor.
D. Interceptors (clarifiers) for sand and similar heavy solids shall be so designed and located as to be readily accessible for cleaning and shall have a water seal in accordance with the most recent state of Oregon plumbing code and other applicable codes.
E. Interceptors (clarifiers) shall be so designed that they will not become air bound if closed covers are used. Each interceptor (clarifier) shall be properly vented.
F. Each interceptor (clarifier) cover shall be readily accessible for servicing and maintaining the interceptor (clarifier) in working and operating condition. The use of ladders or the removal of bulky equipment in order to service interceptors (clarifiers) shall constitute a violation of accessibility. Location of all interceptors (clarifiers) shall be shown on the approved building plan.
G. Every fish, fowl and animal slaughterhouse or establishment and every fish, fowl and meatpacking or curing establishment and every soap factory, tallow rendering, fat rendering and hide curing establishment, or any other establishment from which a considerable amount of grease is likely to be discharged into any plumbing system, sewer system, shall be connected to and shall drain or discharge into a grease interceptor (clarifier) of an approved design for this use.
H. Every private or public wash rack and/or floor or slab used for cleaning machinery or machine parts shall be adequately protected against storm or surface water. It shall drain or discharge into an approved interceptor for grease and sand designed for this use.
I. When, in the judgment of the supervisor, waste pretreatment is required, an approved type grease trap complying with the provisions of this section shall be installed in the waste line leading from sinks, drains, or other fixtures or equipment in establishments such as restaurants, sanatorium, factory, or school kitchens, or other establishments where grease may be introduced into the drainage or sewage system. A grease trap is not required for individual dwelling units or any private living quarters unless required by the supervisor.
1. A grease trap shall be installed which has an approved rate of flow in accordance with the most recent state of Oregon plumbing code, "Idaho Standards For Public Works Construction", and other applicable codes, except when specially approved by the supervisor.
2. All interceptors shall be installed and operated in accordance with the most recent state of Oregon plumbing code, "Idaho Standards For Public Works Construction", and other applicable codes.
J. When grease interceptors are required, the sizing criteria shall be in accordance with the most recent state of Oregon plumbing code and other applicable codes.
K. Unless specifically required or permitted by the supervisor, no food waste disposal unit shall be connected to or discharge into any interceptor or grease trap.
L. Use of emulsifiers is prohibited. The introduction of emulsifiers, enzymes, or any other products into a grease trap or interceptor (clarifier) which would cause, or is meant to cause, oil or grease to pass through the grease trap or interceptor (clarifier) is prohibited. (Ord. 624-08, 8-12-2008)