§ 16.32.020. General prohibition.

A.

No person shall introduce or cause to be introduced into the municipal separate storm sewer system (MS4) any discharge that is not composed entirely of stormwater, except as allowed in subsection B.

B.

The following nonstormwater discharges are deemed acceptable and not a violation of this section:

1.

A discharge authorized by, and in full compliance with, an NPDES permit (other than the NPDES permit for discharges from the MS4);

2.

A discharge or flow resulting from emergency fire fighting;

3.

A discharge or flow of fire protection water that does not contain oil or hazardous substances or materials;

4.

A discharge from water line flushing;

5.

A discharge or flow from lawn watering, landscape irrigation, or other irrigation water;

6.

A discharge or flow from a diverted stream flow or natural spring;

7.

A discharge or flow from uncontaminated pumped groundwater or rising groundwater;

8.

Uncontaminated groundwater infiltration;

9.

Uncontaminated discharge or flow from a foundation drain, crawl space pump, footing drain, or sump pump;

10.

A discharge or flow from a potable water source not containing any harmful substance or material from the cleaning or draining of a storage tank or other container;

11.

A discharge or flow from air conditioning condensation that is unmixed with water from a cooling tower, emissions scrubber, emissions filter, or any other source of pollutant;

12.

A discharge or flow from individual residential car washing;

13.

A discharge or flow from a riparian habitat or wetland or natural spring;

14.

A discharge or flow from water used in street washing that is not contaminated with any soap, detergent, degreaser, solvent, emulsifier, dispersant, or any other harmful cleaning substance;

15.

Stormwater runoff from a roof that is not contaminated by any runoff or discharge from an emissions scrubber or filter or any other source of pollutant;

16.

Swimming pool water, excluding filter backwash; that has been dechlorinated so that it contains no harmful quantity of chlorine, muriatic acid or other chemical used in the treatment or disinfection of the swimming pool water or in pool cleaning;

17.

Heat pump discharge waters (residential only).

C.

Notwithstanding the provisions of subsection B of this section, any discharge shall be prohibited by this section if the discharge in question has been determined by the director to be a source of a pollutants to the waters of the United States or to the MS4, written notice of such determination has been provided to the discharger, and the discharge has occurred more than ten days beyond such notice.

(Ord. No. 44-123 § 2)