Chapter 16.32
WATER POLLUTION

Sections:

16.32.010    Purpose.

16.32.020    Definitions.

16.32.030    Illicit discharges.

16.32.040    Illicit connections and uses.

16.32.050    Inspection and enforcement.

16.32.010 Purpose.

The purpose of this Chapter is to protect the County’s surface and groundwater quality by controlling the discharge of pollutants and comply with the County’s NPDES permit. (Ord. O20150006 § 2 (Att. A))

16.32.020 Definitions.

The definitions in SCC 14.04.020 apply to this Chapter and are incorporated by reference. (Ord. O20150006 § 2 (Att. A))

16.32.030 Illicit discharges.

(1)    Illicit Discharges Prohibited. No person may throw, drain, or otherwise discharge, cause or allow others under its control to throw, drain, or otherwise discharge into the stormwater system any materials other than stormwater.

(2)    Allowable Discharges. The following types of discharges are not illicit discharges for the purpose of this Chapter unless the Administrative Official 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 groundwaters.

(c)    Uncontaminated groundwater infiltration as defined in 40 CFR 35.2005(20).

(d)    Uncontaminated pumped groundwater.

(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.

(l)    Discharges from emergency firefighting activities.

(3)    Conditionally Allowed Discharges. The following types of discharges are not illicit discharges for the purposes of this Chapter if they meet the stated conditions, unless the Administrative Official 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, fire hydrant system flushing, and pipeline hydrostatic test water. Planned discharges must be dechlorinated to a concentration of 0.1 ppm or less, pH-adjusted, if necessary and in volumes and velocities controlled to prevent re-suspension of sediments in the stormwater system.

(b)    Lawn watering and other irrigation runoff are permitted but must be minimized.

(c)    Dechlorinated swimming pool discharges. These discharges must be dechlorinated to a concentration of 0.1 ppm or less, pH-adjusted, if necessary and in volumes and velocities controlled to prevent resuspension of sediments in the stormwater system. Discharges must be thermally controlled to prevent an increase in temperature of the receiving water.

(d)    Street and sidewalk wash water, water 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 is minimized. At active construction sites, street sweeping must be performed prior to washing the street.

(e)    Other nonstormwater discharges. The discharges must be in compliance with the requirements of a stormwater pollution prevention plan (SWPPP) reviewed and approved by the County which addresses control of such discharges by applying AKART to prevent pollutants from entering surface or groundwater.

(4)    Exemptions.

(a)    The following discharges are exempt from the provisions of this Section:

(i)    The regulated effluent from any commercial or municipal facility holding a valid State or Federal wastewater discharge permit or NPDES stormwater permit.

(ii)    Acts of God or nature not compounded by human negligence.

(iii)    Properly operating on-site domestic sewage systems.

(iv)    Discharges from agricultural activities that are compliant with SCC 14.24.120.

(b)    A person does not commit an illicit discharge if:

(i)    That person has properly designed, constructed, implemented and is maintaining BMPs and is carrying out AKART as required by SCC Chapter 14.32, even if pollutants continue to enter surface and stormwater or groundwater; or

(ii)    That person can demonstrate that there are no additional pollutants being discharged from the site above the background conditions of the water entering the site.

(5)    Best Management Practices (BMPs).

(a)    Compliance with this Chapter must be achieved through the use of best management practices described in the Stormwater Management Manual or as described below.

(b)    BMPs must be applied to any business or residential activity that might result in illicit discharges. In applying the Stormwater Management Manual, the Administrative Official must first require the implementation of source control BMPs. If these are not sufficient to prevent pollutants from entering stormwater, the Administrative Official may require implementation of treatment BMPs as set forth in AKART (all known, available, and reasonable methods of prevention and treatment technology). (Ord. O20150006 § 2 (Att. A))

16.32.040 Illicit connections and uses.

(1)    No person may use the stormwater system, directly or indirectly, to dispose of any solid or liquid matter other than stormwater.

(2)    No person may make, allow, use, or allow the continued existence of any connection to the stormwater system that could result in an illicit discharge.

(3)    Connections to the stormwater system from the interiors of structures are prohibited.

(4)    Connections to the stormwater system for any purpose other than to convey stormwater or groundwater are prohibited and must be eliminated. (Ord. O20150006 § 2 (Att. A))

16.32.050 Inspection and enforcement.

The Administrative Official is authorized to carry out inspection and enforcement actions pursuant to SCC Chapter 14.44, Enforcement/Penalties. (Ord. O20150006 § 2 (Att. A))