13.28.025 Authorized and prohibited discharges.
A. Prohibited Discharges – Prohibition of Illegal Discharges. No person shall throw, drain, or otherwise discharge, cause or allow others under its control to throw, drain or otherwise discharge into the municipal storm drainage facility and/or surface and groundwaters any materials other than stormwater.
Examples of prohibited contaminants 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 cleaning wastewater, or 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.
31. Contaminants, such as sediment, trash, oil and grease, soaps, and other potential contaminants listed above found in wash water.
B. Allowable Discharges. The following types of discharges shall not be considered illegal discharges for the purposes of this chapter unless the Director 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 groundwater:
1. Diverted stream flows.
2. Rising groundwaters.
3. Uncontaminated groundwater infiltration, as defined in 40 CFR 35.2005(20).
4. Uncontaminated pumped groundwater.
5. Foundation drains.
6. Air conditioning condensation.
7. Irrigation water from agricultural sources that is commingled with urban stormwater.
8. Springs.
9. Water from crawl space pumps.
10. Footing drains.
11. Flows from riparian habitats and wetlands.
12. Discharges from emergency firefighting activities.
13. Dye testing is allowable but requires verbal notification to the Director at least 1 day prior to the date of test.
14. Nonstormwater discharges authorized by another National Pollution Discharge Elimination System or State waste discharge permit.
C. Conditional Discharges. The following types of discharges are prohibited unless the stated conditions are met, or unless the Director 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 groundwater:
1. Potable water, including water from water line flushing, and hyperchlorinated water line flushing;
2. Fire hydrant system flushing, and pipeline hydrostatic test water. Planned discharges shall be dechlorinated to a total residual chlorine concentration of 0.1 ppm or less, pH-adjusted, if necessary, and volumetrically and velocity controlled to prevent resuspension of sediments in the MS4;
3. Discharges from lawn watering and other irrigation runoff. These shall be minimized through, at a minimum, public education activities and water conservation efforts;
4. Dechlorinated swimming pool, spa, and hot tub discharges. These discharges shall be dechlorinated to a total residual chlorine concentration of 0.1 ppm or less, pH-adjusted and reoxygenated if necessary, and volumetrically and velocity controlled to prevent resuspension of sediments in the MS4. 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 MS4;
5. Street and sidewalk wash water, water used to control dust, and routine external building wash down that does not use detergents. These discharges shall be reduced through, at a minimum, public education activities and/or water conservation efforts. To avoid washing pollutants into the MS4, the amount of street wash and dust control water used must be minimized. At active construction sites, street sweeping must be performed prior to washing the street;
6. Other nonstormwater discharges. The discharges shall be in compliance with the requirements of a stormwater pollution prevention plan (SWPPP) reviewed by the City which addresses control of such discharges.
D. Prohibition of Illicit Connections.
1. The construction, use, maintenance, or continued existence of illicit connections to the storm drain system is prohibited.
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 considered to be in violation of this chapter if the person connects a line conveying sewage to the MS4, or allows such a connection to continue. (Ord. 2989 § 1 (Exh. A1), 2022; Ord. 2783 § 2 (Exh. A2), 2016; Ord. 2560 § 2 (Exh. A1), 2009; Ord. 2288 § 2, 2000).