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;
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.
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(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.
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(Code 1980, § 19.20.260; Ord. No. 740, § 1, 2005; Ord. No. 870 (Recodification), 2014)