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A. Prohibition of Illegal Discharges.

1. No person shall discharge or cause to be discharged into the city’s stormwater drainage system or waters of the state, any materials, including but not limited to, pollutants or waters containing any pollutants.

2. Prohibited discharges include, but are not limited to, the following:

a. Trash or debris;

b. Construction materials;

c. Petroleum products including, but not limited to, oil, gasoline, grease, fuel oil, heating oil;

d. Antifreeze and other automotive products;

e. Metals in excess of naturally occurring amounts, in either particulate or dissolved form;

f. Flammable or explosive materials;

g. Chemicals not normally found in uncontaminated water;

h. Acids, alkalis, or bases;

i. Painting products;

j. Degreasers and/or solvents;

k. Drain cleaners;

l. Commercial and household cleaning products;

m. Pesticides, herbicides, or fertilizers;

n. Steam cleaning wastes;

o. Pressure washing wastes;

p. Soaps, detergents, or ammonia;

q. Chlorinated water, including spa or swimming pool water;

r. Domestic or sanitary sewage;

s. Animal carcasses;

t. Food wastes;

u. Yard wastes;

v. Silt, sediment, or gravel;

w. Any hazardous material or waste;

x. Wastewater or process wastewater (including filtered or purified wastewaters).

3. The following discharges are allowed by this chapter if the discharges do not contain pollutants. The administrator may evaluate and remove any of the exemptions if it is determined that they are causing an adverse impact.

a. Diverted stream flows (i.e., channeled or piped streams);

b. Rising ground waters and springs;

c. Flows from riparian habitats and wetlands;

d. Uncontaminated ground water infiltration (as defined in 40 CFR 35.2005(20));

e. Uncontaminated pumped ground water;

f. Foundation and footing drains;

g. Air conditioning condensation;

h. Irrigation water from agricultural sources that is commingled with urban stormwater;

i. Water from crawl space pumps;

j. Non-stormwater discharges covered by another NPDES permit;

k. Discharges from emergency fire fighting activities;

l. Discharges specified in writing by the administrator as being necessary to protect public health and safety.

4. The following types of discharges shall only be permitted if the stated conditions are met:

a. Discharges from potable water sources, including water line flushing, fire hydrant system flushing, and pipeline hydrostatic test water; planned discharges shall be de-chlorinated to a concentration of 0.1 ppm or less, pH-adjusted if necessary, and volumetrically and velocity controlled to prevent re-suspension of sediments in the storm drainage system.

b. Discharges from lawn watering and other irrigation runoff; these shall be minimized through water conservation efforts.

c. Dechlorinated spa or swimming pool discharges; the discharges shall be dechlorinated to a concentration of 0.1 ppm or less, pH-adjusted and reoxygenized if necessary, volumetrically and velocity controlled to prevent re-suspension of sediments in the storm drainage system. The temperature of the discharge water shall not exceed 65 degrees Fahrenheit. Spa or swimming pool cleaning wastewater and filter backwash shall not be discharged to the storm drainage system.

d. Street and sidewalk wash water, water used to control dust, and routine external building wash down that does not use detergents; the amount of street wash, dust control, and building wash water shall be minimized. At active construction sites, street sweeping must be performed prior to washing the street.

e. Dye testing with verbal notification to the city at least 24 hours prior to the time of the test.

f. Discharges resulting from maintenance, repair, or operation of fire fighting equipment and facilities that are not directly associated with public fire fighting, including discharges from public fire fighting training exercises, unless city-approved best management practices are implemented.

5. Discharge prohibitions shall not apply to any non-stormwater discharge permitted under an NPDES permit, waiver, or waste discharge order issued to the discharger and administered under the authority of the Environmental Protection Agency or Washington State Department of Ecology; provided, that the discharger is in full compliance with all requirements of the permit, waiver, or order and other applicable laws and regulations; and provided, that written approval has been granted for any discharge to the stormwater drainage system.

B. 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.

C. Waste Disposal. No person shall throw, deposit, leave, maintain, or keep in or upon any public or private property, the stormwater drainage system, or waters of the state, any refuse, rubbish, garbage, litter, or other discarded or abandoned objects, articles, or accumulations that may cause or contribute to pollution. Wastes deposited in proper waste receptacles for the purposes of collection are exempt from this prohibition. (Ord. 1168 § 2, 2009).