Discharges of non-stormwater from construction activities are prohibited except for those discharges listed in section 19.20.100 or any discharges authorized by the city engineer or the Regional Water Quality Control Board—Santa Ana Region (RWQCB). The city and the RWQCB will allow the discharge of certain non-stormwater discharges from construction sites, provided that they are in compliance with the discharge limitations specified in the current general waste discharge requirements for de minimus discharges issued by the Regional Water Quality Control Board—Santa Ana Region.
The following discharges are authorized, provided they are in compliance with the permit:
A. 
Construction dewatering wastes;
B. 
Wastes associated with well installation, development, test pumping and purging;
C. 
Aquifer testing wastes;
D. 
Dewatering wastes from subterranean seepage, except for discharges from utility company vaults;
E. 
Discharges resulting from hydrostatic testing of vessels, pipelines, tanks, etc.;
F. 
Discharges resulting from the maintenance of potable water supply pipelines, tanks, reservoirs, etc.;
G. 
Discharges resulting from the disinfection of potable water supply pipelines, tanks, reservoirs, etc.;
H. 
Discharges from potable water supply systems resulting from system failures, pressure releases, etc.;
I. 
Discharges from fire hydrant testing or flushing.
(Code 1980, § 19.20.220; Ord. No. 740, § 1, 2005; Ord. No. 870 (Recodification), 2014)
All construction projects which could potentially have an adverse impact on the city's municipal separate storm sewer system or waters of the state shall install and/or implement appropriate construction and postconstruction best management practices (BMPs), as listed in their water quality management plan (WQMP) or the "California Storm Water Best Management Practice Handbook," to reduce pollutants to the maximum extent practicable or to the extent required by law.
(Code 1980, § 19.20.230; Ord. No. 740, § 1, 2005; Ord. No. 870 (Recodification), 2014)
A. 
Any developer/owner engaging in construction activities which disturb five acres or more of land shall apply for coverage under the general stormwater permit for construction activity with the state water resources control board (SWRCB). Any developer/owner engaging in construction activities which disturb less than five acres but are part of a larger common plan of development or sale that is greater than five acres must also apply for coverage under the general stormwater permit for construction activity with the state water resources control board (SWRCB). The owner of the land where the construction activity is occurring is responsible for obtaining coverage under the permit. Owners may obtain coverage under the general permit by completing a notice of intent form (NOI) and mailing the form along with a vicinity map and the appropriate fee to the office of the state water resources control board. The NOI form and checklist of items to submit to the state is available from the state water resources control board in Sacramento, California or from the city's engineering department, environmental section. In addition, the owner shall also prepare a stormwater pollution prevention plan (SWPPP) in accordance with state requirements.
B. 
Prior to obtaining any city-issued grading and/or construction permits, the developer/owner shall provide evidence of compliance with the general construction permit by providing a copy of the waste discharger's identification number (WDID) to the city's engineering department.
(Code 1980, § 19.20.240; Ord. No. 740, § 1, 2005; Ord. No. 870 (Recodification), 2014)
Authorized non-stormwater discharges under section 19.20.210 shall be reported to the city engineer at least five days prior to a planned discharge. Unplanned discharges of non-stormwater into the city's storm drainage system shall be reported as soon as possible and before any discharge is initiated. The city's engineering department, environmental section will provide a non-stormwater discharge notification form for any developer that is proposing to discharge any non-stormwater from a construction site. The non-stormwater discharge notification form must be submitted to the engineering department, environmental programs section, for these discharges, at least five days prior to any planned discharge or as soon as possible for any unplanned discharge. Monitoring may also be required for these discharges. If the city-provided form is not utilized, a report shall be submitted prior to discharge, which includes the following information:
A. 
Type of proposed discharge;
B. 
Estimated average and maximum daily flow rate;
C. 
Frequency and duration of discharge;
D. 
A description of the proposed treatment system, if applicable;
E. 
A description of the path from the point of discharge to the nearest storm drain inlet.
All discharges shall be monitored daily for flow volume and shall be recorded in a daily log by the person responsible for the discharge. Discharges shall also be sampled during the first 30 minutes of each discharge and weekly thereafter for continuous discharges for chlorine and total suspended solids. Monitoring data for flow, chlorine and suspended solids and any other required constituents shall be reported to the city's engineering department, environmental programs section on a weekly basis.
(Code 1980, § 19.20.250; Ord. No. 740, § 1, 2005; Ord. No. 870 (Recodification), 2014)
Prior to the issuance of any grading or building permit, all qualifying land development/redevelopment projects shall submit and have approved a water quality management plan (WQMP) to the city engineer on a form provided by the city. The WQMP shall identify all best management practices (BMPs) that will be incorporated into the project to control stormwater and non-stormwater pollutants during and after construction and shall be revised as necessary during the life of the project. The WQMP submittal applies to construction projects covered by the NPDES general construction permit as well as construction projects less than five acres. Qualifying development/redevelopment projects include:
A. 
All significant redevelopment projects. For purposes of this subsection A, the term "redevelopment" means the addition or replacement of 5,000 or more square feet of impervious surface on an already developed site subject to the discretionary approval of the permitting jurisdiction. Redevelopment does not include routine maintenance activities that are conducted to maintain original line and grade, hydraulic capacity, original purpose of the facility, or emergency redevelopment activity required to protect public health and safety. Where redevelopment results in an increase of less than 50 percent of the impervious surfaces of a previously existing developed site, and the existing development was not subject to water quality management plan (WQMP) requirements, the numeric sizing criteria discussed in Section 4 of the current version of the San Bernardino County Stormwater Program Technical Guidance Document for Water Quality Management Plans shall apply only to the addition or replacement, and not to the entire developed site. Where redevelopment results in an increase of 50 percent or more of the impervious surfaces of a previously existing developed site, the numeric sizing criteria discussed in Section 4 of the current version of the San Bernardino County Stormwater Program Technical Guidance Document for Water Quality Management Plans shall apply to the entire developed site.
B. 
All new development projects that create 10,000 square feet or more of impervious surface (collectively over the entire development project site), including commercial, industrial, residential housing subdivisions (i.e., detached single-family home subdivisions, multifamily attached subdivisions or townhomes, condominiums, apartments, etc.), mixed-use, and public projects. New development projects include projects on public and private land that fall under the planning and building authority of the permitting jurisdiction.
C. 
New development or significant redevelopment of automotive repair shops (with SIC Codes 5013, 5014, 5541, 7532-7534, 7536-7539) where the project creates, adds and/or replaces 5,000 square feet or more of impervious surface.
D. 
New development or significant redevelopment of restaurants (with SIC Code 5812) where the land area of project is 5,000 square feet or more.
E. 
All hillside developments of 5,000 square feet or more that are located on areas with known erosive soil conditions or where the natural slope is 25 percent or more.
F. 
Developments of 2,500 square feet of impervious surface or more adjacent to (within 200 feet) or discharging directly into environmentally sensitive areas or water bodies listed on the Clean Water Act, section 303(d) list of impaired waters.
G. 
Parking lots of 5,000 square feet or more exposed to stormwater. The term "parking lot" is defined as land area or facility for the temporary parking or storage of motor vehicles.
H. 
New development or significant redevelopment of retail gasoline outlets that are either 5,000 square feet or more, or have a projected average daily traffic of 100 or more vehicles per day.
Non-priority/non-category projects may be required by the local jurisdiction to implement applicable site design LID and LIP requirements.
(Code 1980, § 19.20.260; Ord. No. 740, § 1, 2005; Ord. No. 870 (Recodification), 2014)