9.11.060 Discharge of Pollutants.
The discharge of nonstormwater discharges to the City storm drain system is prohibited, except as provided below.
A. Exceptions to Discharge Prohibition. The following discharges are exempt from the prohibition set forth in this section:
1. Nonstormwater discharges regulated under a NPDES permit issued to the discharger and administered by the State of California under authority of the United States Environmental Protection Agency; provided, that the discharger is in full compliance with all requirements of the permit and other applicable laws or regulations.
2. Discharges or flows from fire-fighting activities unless they are identified as significant sources of pollutants to waters of the United States.
3. Discharges from the following activities, provided any pollutants in the discharges are identified and appropriate control measures to minimize the impacts of such discharges are developed and implemented:
a. Water line flushing;
b. Individual residential car washing;
c. Diverted stream flows;
d. Rising groundwaters;
e. Uncontaminated groundwater infiltration (as defined at 40 C.F.R. 35.2005(20)) to separate storm sewers;
f. Uncontaminated pumped groundwater;
g. Discharges from potable water sources;
h. Foundation drains;
i. Air conditioning condensation;
j. Springs;
k. Water from crawl space pumps;
l. Footing drains;
m. Flows from riparian habitats and wetlands;
n. Dechlorinated swimming pool discharges; and
o. Incidental runoff from landscaped areas provided the conditions in subsection (A)(4) of this section are met.
4. Incidental runoff is the unintended amounts of runoff that escapes the area of intended use, such as minimal over-spray from sprinklers. Water leaving the area of intended use is not incidental if it is due to the design, excessive application, or intentional overflow or application. Irrigation systems must be designed to conserve water and prevent water leaving the area of intended use. Property owners and persons responsible shall control irrigation systems to prevent excessive irrigation runoff by implementing the following BMPs:
a. Detect and repair leaks from the irrigation system within seventy-two (72) hours of discovering the leak;
b. Properly design and aim sprinkler heads to only irrigate the planned application area;
c. Do not irrigate during precipitation events; and
d. Where recycled water is used for irrigation, design and manage holding ponds such that no discharge occurs unless it is the result of a twenty-five-year, twenty-four-hour storm event or greater. Any releases from holding ponds must be reported to the Regional Water Board and the county within twenty-four (24) hours of the discharge. (Ord. 1030 § 2(7), 2018; Ord. 1005 § 2, 2015)