1. Flammable liquids, solids or gases capable of causing or contributing to an explosion or supporting combustion in any public sewer facility or side sewer connection to the public sewer system, such as, but not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides, or any other substances that the utility, King County department of metropolitan services, a fire department or fire district with jurisdiction, any state agency or the Environmental Protection Agency have identified as a fire hazard or a hazard to the system;

2. Any solid or viscous substance or particles in a quantity, either by itself or in combination with other wastes, that is capable of obstructing flow or interfering with the operation or performance of the public sewer system;

3. Any gas or substance that, either by itself or by interaction with other wastes, is capable of creating a public nuisance or hazard to life or of preventing entry by authorized personnel to pump stations and other sewer facilities;

4. Any gas or substance that, either by itself or by interaction with other wastes, may cause corrosive structural damage to the public sewer system;

5. Heated substances in amounts that prevent entry into public sewer facilities by authorized personnel or that adversely impact facilities;

6. Food waste that cannot pass through a one-fourth-inch sieve;

7. Any radioactive wastes or isotopes that exceed such concentration limitations as established by applicable Washington State Department of Health regulations;

8. Trucked and hauled wastes, except as approved by the utility and discharged at designated locations;

9. Storm water, surface water, ground water, roof runoff, subsurface drainage, cooling water, unpolluted waste water and/or any water or wastes generated during construction activities, unless specifically authorized by the utility;

10. Substances that may cause excessive foaming in the public sewer system;

11. Polar and nonpolar fats, oils and greases in amounts that cause a visible sheen on the discharge or in the public sewer system, build-up of grease in any public sewer facility or which accumulations either alone or in combination with other discharges cause obstruction of the public sewer system; or

12. Any wastes or substances which exceed local discharge limits of, or are prohibited by, any other federal, state or local agency having governmental or contractual jurisdiction within the sewer service area.