(1) Potable Water. Potable water discharges include water line flushing, hyperchlorinated water line flushing, fire hydrant system flushing, and pipeline hydrostatic test water. Such discharges shall be dechlorinated to a concentration of 0.1 ppm or less, pH-adjusted, if necessary, and volumetrically and velocity controlled to prevent resuspension of sediments in the receiving stormwater facility.

(2) Lawn Watering and Irrigation Water. Runoff from lawn watering and irrigation shall be minimized.

(3) Swimming Pool Water. Swimming pool discharges shall be dechlorinated to a concentration of 0.1 ppm or less, pH-adjusted and reoxygenized if necessary, and volumetrically and velocity controlled to prevent resuspension of sediments in the receiving stormwater facility. Swimming pool cleaning wastewater and filter backwash shall be discharged to the sanitary sewer system.

(4) Wash Water/Dust Control Water. Such discharges include street and sidewalk wash water, external building wash down water that does not include detergents, and water used to control dust. Discharges shall be minimized, and street-sweeping shall be performed prior to street-washing at active construction sites.

(5) Nonstormwater Discharges Covered by Another NPDES Permit. Such discharges are prohibited unless the permittee is in full compliance with all permit requirements, waiver, or order, and other applicable laws and regulations and that written approval by the Director has been granted for the discharge.

(6) Other Nonstormwater Discharges. All other nonstormwater discharges not specifically listed in subsections (1) through (4) of this section shall comply with the requirements of the stormwater pollution prevention plan approved by the Director, which addresses control of construction site de-watering discharges by applying AKART to prevent contaminants from entering surface water or groundwaters. (Ord. 13-09 § 10 (Exh. 2))