DEVELOPMENT STANDARDS PRETREATMENT OF WASTEWATER 2 other harmful ingredients from being carried into the sewer system. The owner shall be responsible for the proper removal and disposal of wastes captured and shall maintain records of the dates and means of disposal, which shall be available for review by the director or representative. Collected materials shall not be disposed of in sanitary, industrial or storm sewers. Failure to provide or maintain pretreatment devises such as grease, oil, and sand traps in accordance with the provisions of this section shall be a violation and subject to the sections Municipal Code 9.94 4.5 All costs associated with installing, maintaining, and testing of any and all required pretreatment facilities are the sole responsibility of the owner. 4.6 No statement contained in this policy and procedure shall be construed as preventing an agreement between the city and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the city for treatment, subject to payment therefore, by the industrial concern provided that the following criteria are met: 4.6.1 The city has the physical capacity for treatment; and (Currently and in the future) 4.6.2 The industrial waste is compatible with the biological treatment process as determined by the city. 4.7 Separators shall not be required for private living quarters or dwelling units. 5.0 PROCEDURES All measurements, and analyses of the characteristics of wastewater, to which reference is made in this policy and procedure shall be determined in accordance with the latest edition of "Standard Methods of the Examination of Water and Wastewater" published by the American Public Health Association and shall be determined from an approved sampling location provided by the owner. 6.0 GREASE INTERCEPTORS Grease, oil, and sand interceptors shall be provided in commercial and or retail food preparation operations, regardless of size when, in the opinion of the Director of Public Works, they are necessary for proper handling of liquid wastes containing floatable or emulsified grease, fats or oil in amounts exceeding those specified in section 9.25.310.F). This shall include Dischargers who operate restaurants, cafes, lunch counters, cafeterias, bars, or clubs: or hotel, hospital, sanitarium, factory, or school kitchens: or other establishment that serve or prepare food where grease may be introduced into the sewer system shall have grease interceptor (grease traps) to prevent the discharge of fat waste, oil, or grease. Take out food establishments or other establishments that prepare food but do not cook in oil or grease, and who serve only in disposable containers, may be exempted from this requirement, provided their discharges do not violate section 9.25.310-(F) general discharge prohibitions of this chapter. All wastes discharged into the food processing sewer will be adequately screened by a twenty mesh or finer screen before discharge. An additional screen, with openings no larger than one quarter square inch shall be installed in a fixed position so all materials must pass through said screen immediately before entrance into the sewer. Commercial garbage disposals or grinders are not recommended. Enzymes, bio additives chemical degreasers and hot water flushes are prohibited from entering the grease interceptor or trap. Size and design of the grease interceptor shall conform to the Uniform Plumbing Code Standards most recently adopted by the City and be subject to approval by the Director of Public Works in conjunction with the Building Department.
