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A. Purpose. Fats, oil and grease cause many problems in sanitary sewer lines. Fats, oil and grease collect on the sides of pipes, and bacteria that feed on fats, oil and grease produce corrosive acids and gas that will damage pipes and manholes. Sewer blockages that result can overflow onto streets and property, disrupting residential, commercial, and industrial operations, and carry the potential for health risks. The cost of increased maintenance and replacement of sewer lines is high, as well as the potential impacts to the environment. The requirements set forth in this chapter are designed to aid in the prevention of sanitary sewer blockages and obstructions from contributions and accumulation of animal or vegetable derived fats, oil and greases discharged to the sanitary sewer system from industrial or commercial establishments, particularly food preparation and serving facilities.

The objectives of this chapter are to use reasonable and technically feasible controls to:

1. Prevent sanitary sewer overflows caused by fats, oils and grease.

2. Reduce the amount of fats, oils and grease discharged to the sanitary sewer collection system.

3. Reduce maintenance costs for the sanitary sewer collection system.

4. Improve operation of the sanitary sewer collection system.

5. Comply with King County Industrial Waste Local Discharge Limits and prohibited discharges.

B. Applicability. The provisions in this section shall apply to all food processing establishments, food sales establishments, and food service establishments, commercial businesses, and any other facility (“facility”) that discharges fats, oil and grease to the sanitary sewer collection system and is located within the municipal boundaries of the City of Issaquah Sanitary Sewer Service Area. (Ord. 2716 § 2 (Exh. A1), 2014; Ord. 2612 § 2 (Exh. A1), 2011).