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1100 N Tower Avenue
Centralia, WA 98531
Phone: 360-330-7512
Fax: 360-330-7516
Contact: Kim Ashmore, Public Works Director
Email: 
Hours: M-F 8:00-5:00 pm Except Holidays
  Prohibited and Allowable Discharges

PROHIBITED AND ALLOWABLE DISCHARGES

15.37.020 Prohibited discharges.
A.  Illicit discharges are prohibited. No person shall throw, drain, or otherwise discharge, cause or allow others under its control to throw, drain or otherwise discharge into the city’s storm drainage system and/or surface and ground waters any materials, including hazardous materials and pollutants, other than stormwater.

B.  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 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 chapter; and

30.  Any hazardous material or waste not listed above. (Ord. 2236 § 2 (part), 2009).

15.37.030 Allowable discharges.
The following types of discharges shall not be considered illicit discharges for the purposes of this chapter unless the city 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:

A.  Diverted stream flows;

B.  Rising ground waters;

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

D.  Uncontaminated pumped ground water;

E.  Foundation drains;

F.  Air conditioning condensation;

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

H.  Springs;

I.  Water from crawl space pumps;

J.  Footing drains;

K.  Flows from riparian habitats and wetlands; and

L.  Discharge from emergency fire fighting activities. (Ord. 2236 § 2 (part), 2009).

15.37.040 Conditional discharges.
The following types of discharges shall not be considered illicit discharges for the purposes of this chapter if they meet the stated conditions or unless the city 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:

A.  Potable water, including water from water line flushing, hyperchlorinated water line flushing, fire hydrant system flushing, and pipeline hydrostatic test water. Planned discharges shall be de- chlorinated to a concentration of one-tenth ppm or less, pH-adjusted, if necessary and in volumes and velocities controlled to prevent resuspension of sediments in the stormwater system;

B.  Lawn watering and other irrigation runoff are permitted but shall be minimized;

C.  De-chlorinated swimming pool discharges. These discharges shall be dechlorinated to a concentration of one-tenth ppm or less, pH-adjusted, if necessary and in volumes and velocities controlled to prevent resuspension of sediments in the stormwater system;

D.  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. At active construction sites, street sweeping must be performed prior to washing the street;

E.  Nonstormwater discharges covered by another NPDES permit; 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 storm drain system; and

F.  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 by applying AKART to prevent contaminants from entering surface or ground water. (Ord. 2236 § 2 (part), 2009).



 

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