14.28.140 Illicit discharges and connections.
A. Prohibited Discharges. No person shall throw, drain, or otherwise discharge, cause or allow others under its control to throw, drain or otherwise discharge into the storm drainage system or any receiving waters any materials other than stormwater. Illicit discharges are prohibited and constitute a violation of this chapter. Examples of prohibited materials include, but are not limited to, the following:
1. Trash or debris.
2. Construction materials.
3. Petroleum products including but not limited to oil, gasoline, grease, fuel oil and heating oil.
4. Antifreeze and other automotive products.
5. Metals in either particulate or dissolved form.
6. Flammable or explosive materials.
7. Radioactive material.
8. Batteries.
9. Acids, alkalis, or bases.
10. Paints, stains, resins, lacquers, or varnishes.
11. Degreasers and/or solvents.
12. Drain cleaners.
13. Pesticides, herbicides, or fertilizers.
14. Steam cleaning wastes.
15. Soaps, detergents, or ammonia.
16. Swimming pool or spa filter backwash.
17. Chlorine, bromine, or other disinfectants.
18. Heated water.
19. Domestic animal wastes.
20. Sewage.
21. Recreational vehicle waste.
22. Animal carcasses.
23. Food wastes.
24. Bark and other fibrous materials.
25. Lawn clippings, leaves, or branches.
26. Silt, sediment, concrete, cement or gravel.
27. Dyes.
28. Chemicals not normally found in uncontaminated water.
29. Any other process-associated discharge except as otherwise allowed in this section.
30. Any hazardous material or waste not listed above.
B. Allowable Discharges. The following types of discharges shall not be considered illicit discharges for the purposes of this chapter unless the director or designee determines that the type of discharge, whether singly or in combination with others, is causing or is likely to cause pollution of surface water or ground water:
1. Diverted stream flows.
2. Rising ground waters.
3. Uncontaminated ground water infiltration—as defined in 40 CFR 35.2005(b)(20).
4. Uncontaminated pumped ground water.
5. Foundation drains.
6. Air conditioning condensation.
7. Irrigation water from agricultural sources that is commingled with urban stormwater.
8. Springs.
9. Uncontaminated water from crawlspace pumps.
10. Footing drains.
11. Flows from riparian habitats and wetlands.
12. Discharges from emergency firefighting activities.
13. Nonstormwater discharges authorized by another NPDES or state waste discharge permit.
C. Conditionally Allowable Discharges. The following types of discharges shall not be considered illicit discharges for the purpose of this chapter if they meet the stated conditions, or unless the director or designee determines that the type of discharge, whether singly or in combination with others, is causing or is likely to cause pollution of surface water or ground water:
1. Potable water sources, including but not limited to water line flushing, hyper-chlorinated water line flushing, fire hydrant system flushing, and pipeline hydrostatic test water. Planned discharges shall be dechlorinated to a total residual chlorine concentration of one-tenth ppm or less, pH-adjusted, if necessary, and volumetrically and velocity controlled to prevent resuspension of sediments in the stormwater system.
2. Lawn watering and other irrigation runoff. These discharges shall be minimized through, at a minimum, public education activities and water conservation efforts.
3. Dechlorinated swimming pool, spa and hot tub discharges. These discharges shall be dechlorinated to a total residual chlorine concentration of one-tenth ppm or less, pH-adjusted, and re-oxygenized if necessary, volumetrically and velocity controlled to prevent resuspension of sediments in the stormwater system. Discharges shall be thermally controlled to prevent an increase in temperature of the receiving water. Swimming pool cleaning wastewater and filter backwash shall not be discharged to the stormwater system.
4. Street and sidewalk wash water, water used to control dust, and routine external building wash down that does not use detergents are permitted if the amount of street wash and dust control water used is minimized through public education activities and/or water conservation efforts. To avoid washing pollutants into the stormwater system, minimize the amount of street wash and dust control water used.
5. Other nonstormwater discharges. The discharges shall be in compliance with the requirements of a stormwater pollution prevention plan (SWPPP) reviewed and approved by the city, which addresses control of such discharges.
D. Failure to Remove Pollutants from Private System. It shall be a violation of this chapter for any person who commits an illicit or conditional discharge in violation of this section to fail to remove the pollutants from a private system that enters the stormwater drainage system and/or surface and ground waters. In addition, it shall be a violation of this chapter for any property owner on whose property an illicit or conditional discharge occurs to fail to remove the pollutants from a private system that enters the stormwater drainage system or surface and ground water.
E. Prohibition of Illicit Connections.
1. The construction, use, maintenance, or continued existence of illicit connections to the stormwater drainage system is prohibited and constitutes a violation of this chapter.
2. This prohibition expressly includes, without limitation, illicit connections made in the past, regardless of whether the connection was permissible under law or practices applicable or prevailing at the time of connection.
3. A person is in violation of this section if the person connects a line conveying sewage to the stormwater system, or allows such a connection to continue. (Ord. 3880-22 § 4 (Exh. A), 2022.)