Except as specifically provided herein, any term used in this
chapter shall be defined as that term in the current municipal NPDES
permit, or if it is not specifically defined in either the municipal
NPDES permit, then as such term is defined in the Federal Clean Water
Act, as amended, and/or the regulations promulgated thereunder. If
the definition of any term contained in this chapter conflicts with
the definition of the same term in the current municipal NPDES permit,
then the definition contained in the municipal NPDES permit shall
govern. The following words and phrases shall have the following meanings
when used in this chapter:
"85th Percentile, 24-hour storm event"
is a statistical design storm defined through a hydrologic
analysis of long-term rainfall records for a particular geographic
area. At the most basic level, the design storm represents the 85th
percentile, 24-hour rainfall depth (typically measured in inches of
rain) among all 24-hour rainfall depths evaluated in the historical
record. Analyses that define this storm event often express the 85th
percentile, 24-hour storm event as an "isohyetal" or "isopluvial"
map with contour lines connecting areas with the same 85th percentile,
24-hour rainfall depth. In some situations (e.g., in storm hydrographs),
the temporal distribution of rainfall during the 85th percentile,
24-hour storm event may be assumed.
"Adverse impact"
means a detrimental effect upon water quality or beneficial
uses caused by a discharge or loading of a pollutant or pollutants.
"Areas of Special Biological Significance (ASBS)"
as defined in the Water Quality Control Plan for Ocean Waters
of California (California Ocean Plan), ASBS are all those areas designated
by the State Water Board as ocean areas requiring protection of species
or biological communities to the extent that maintenance of natural
water quality is assured. All Areas of Special Biological Significance
are also classified as a subset of State Water Quality Protection
Areas. ASBS are also referred to as State Water Quality Protection
Areas – Areas of Special Biological Significance (SWQPA-ASBS).
"Authorized discharge"
means any discharge that is authorized pursuant to an NPDES
permit, waste discharge requirements, a conditional waiver of waste
discharge requirements, or other appropriate order issued by the State
or Regional Water Board or complies with the requirements set forth
in the Municipal NPDES Permit.
"Automotive service facility"
means a facility that is categorized in any one of the following
Standard Industrial Classification (SIC) and North American Industry
Classification System (NAICS) codes. For inspection purposes, permittees
need not inspect facilities with SIC codes 5013, 5014, 5541, 5511,
provided that these facilities have no outside activities or materials
that may be exposed to stormwater.
"Basin Plan"
means the Water Quality Control Plan, Los Angeles Region,
Basin Plan for the Coastal Watersheds of Los Angeles and Ventura Counties,
adopted by the Regional Water Board on June 13, 1994, and all subsequent
amendments.
"Best Management Practice (BMP)"
means practices or physical devices or systems designed to
prevent or reduce pollutant loading from stormwater or non-stormwater
discharges to receiving waters.
"Biofiltration"
means a LID BMP that reduces stormwater pollutant discharges
by intercepting rainfall on vegetative canopy, and through incidental
infiltration and/or evapotranspiration, and filtration. Incidental
infiltration is an important factor in achieving the required pollutant
load reduction. Therefore, the term "biofiltration" as used is defined
to include only systems designed to facilitate incidental infiltration
or achieve the equivalent pollutant reduction as biofiltration BMPs
with an underdrain. Biofiltration BMPs include bioretention systems
with an underdrain and bioswales.
"Bioretention"
means a LID BMP that reduces stormwater runoff by intercepting
rainfall on vegetative canopy, and through evapotranspiration and
infiltration. The bioretention system typically includes a minimum
two-foot top layer of a specified soil and compost mixture underlain
by a gravel-filled temporary storage pit dug into the in-situ soil.
As defined in the municipal NPDES permit, a bioretention BMP may be
designed with an overflow drain, but may not include an underdrain.
When a bioretention BMP is designed or constructed with an underdrain
it is regulated by the municipal NPDES permit as biofiltration.
"Bioswale"
means a LID BMP consisting of a shallow channel lined with
grass or other dense, low-growing vegetation. Bioswales are designed
to collect stormwater runoff and to achieve a uniform sheet flow through
the dense vegetation for a period of several minutes.
"City"
means the City of Claremont.
"Clean Water Act (CWA)"
means the Federal Water Pollution Control Act enacted in
1972, by Public Law 92-500, and amended by the Water Quality Act of
1987. The Clean Water Act prohibits the discharge of pollutants to
waters of the United States unless the discharge is in accordance
with an NPDES permit.
"Commercial malls"
means any development on private land comprised of one or
more buildings forming a complex of stores which sells various merchandise,
with interconnecting walkways enabling visitors to easily walk from
store to store, along with parking area(s). A commercial mall includes,
but is not limited to: mini-malls, strip malls, other retail complexes,
and enclosed shopping malls or shopping centers.
"Conditionally exempt essential non-stormwater discharge"
are certain categories of discharges that are not composed
entirely of stormwater and that are allowed by the Los Angeles Water
Board to discharge into the MS4, if the discharge is in compliance
with all specified requirements; are not otherwise regulated by an
individual or general NPDES permit; and are essential public services
that are directly or indirectly required by other state or federal
statute and/or regulation. These include non-stormwater discharges
such as from drinking water supplier distribution system releases.
Conditionally exempt essential nonstormwater discharges may contain
minimal amounts of pollutants, however, when in compliance with industry
standard BMPs and control measures, do not result in significant environmental
effects.
"Conditionally exempt non-stormwater discharge"
are certain categories of discharges that are not composed
entirely of stormwater and that are either not sources of pollutants
or may contain only minimal amounts of pollutants and when in compliance
with specified BMPs do not result in significant environmental impacts.
"Construction activity"
means any construction or demolition activity, clearing,
grading, grubbing, or excavation or any other activity that result
in land disturbance. Construction does not include emergency construction
activities required to immediately protect public health and safety
or routine maintenance activities required to maintain the integrity
of structures by performing minor repair and restoration work, maintain
the original line and grade, hydraulic capacity, or original purposes
of the facility. See "routine maintenance" definition for further
explanation. Where clearing, grading, or excavating of underlying
soil takes place during a repaving operation, state general construction
permit coverage by the State of California general permit for storm
water discharges associated with industrial activities or for stormwater
discharges associated with construction activities is required if
more than one acre is disturbed or the activities are part of a larger
plan.
"Control"
means to minimize, reduce, or eliminate or prohibit by technological,
legal, contractual, or other means, the discharge of pollutants from
an activity or activities.
"Council"
means the City Council of the City of Claremont.
"Dechlorinated/debrominated swimming pool/spa discharges"
means swimming pool discharges which do not contain measurable
quantities of chlorine or bromine and do not contain any detergents,
wastes, or additional chemicals not typically found in swimming pool
water. The term does not include swimming pool filter backwash.
"Department"
means the Community Development Department of the City of
Claremont.
"Development"
means construction, rehabilitation, redevelopment, or reconstruction
of any public or private residential project (whether single-family,
multi-unit, or planned unit development); industrial, commercial,
retail, and other nonresidential projects, including public agency
projects; or mass grading for future construction. It does not include
routine maintenance to maintain original line and grade, hydraulic
capacity, or original purpose of facility, nor does it include emergency
construction activities required to immediately protect public health
and safety.
"Direct discharge"
means outflow from a drainage conveyance system that is composed
entirely or predominantly of flows from the subject, property, development,
subdivision, or industrial facility, and not commingled with the flows
from adjacent lands.
"Directly adjacent"
means situated within 200 feet of the contiguous zone required
for the continued maintenance, function, and structural stability
of the environmentally sensitive area.
"Director"
means the Director of Community Development, or his/her authorized
deputy, agent, representative or inspector.
"Discharge"
when used without qualification means the release of a pollutant
from the MS4.
"Disturbed area"
means an area that is altered as a result of clearing, grading,
and/or excavation.
"Drinking water distribution system discharges"
means sources of flows from drinking water storage, supply,
and distribution systems including flows from system failures, pressure
releases, system maintenance, distribution line testing, fire hydrant
flow testing; and flushing and dewatering of pipes, reservoirs, vaults,
and minor non-invasive well maintenance activities not involving chemical
addition(s). It does not include wastewater discharges from activities
that occur at wellheads, such as well construction, well development
(i.e., aquifer pumping tests, well purging, etc.), or major well maintenance.
"Effective Impervious Area (EIA)"
is the portion of the surface area that is hydrologically
connected to a drainage system via a hardened conveyance or impervious
surface without any intervening pervious area to mitigate the runoff
volume.
"Emergency situation"
means any incident, whether natural, technological, or human-caused,
that requires responsive action to protect life or property (as defined
by the Federal Emergency Management Agency). The responsive action
should implement measures, to the fullest extent possible, to reduce
the threat to water quality.
"Flow-through BMPs"
means modular, vault type "high flow biotreatment" devices
contained within an impervious vault with an underdrain or designed
with an impervious liner and an underdrain.
"Green roof"
means a LID BMP using planter boxes and vegetation to intercept
rainfall on the roof surface. Rainfall is intercepted by vegetation
leaves and through evapotranspiration. Green roofs may be designed
as either a bioretention BMP or as a biofiltration BMP. To receive
credit as a bioretention BMP, the green roof system planting medium
shall be of sufficient depth to provide capacity within the pore space
volume to contain the design storm depth and may not be designed or
constructed with an underdrain.
"Hydrologic Unit Code (HUC)"
is standardized watershed classification system in which
each hydrologic unit is identified by a unique hydrologic unit code
(HUC). The HUC may consist of an eight to 12 digit number. The eight-digit
HUC identifies an area based on four levels of classification: region,
sub-region, hydrologic basin, and hydrologic sub-basin. The watershed
boundary dataset includes the 12-digit HUC delineation, which further
divides each hydrologic unit into watersheds and sub-watersheds based
on scientific information and not administrative boundaries.
"Hydromodification"
means the alteration away from a natural state of stream
flows or the beds or banks of rivers, streams, or creeks, including
ephemeral washes, which results in hydrogeomorphic changes.
"Illicit connection"
means any man-made conveyance that is connected to the storm
drain system without a permit, excluding roof drains and other similar
type connections. Examples include channels, pipelines, conduits,
inlets, or outlets that are connected directly to the storm drain
system.
"Illicit discharge"
means any discharge into the MS4 that is prohibited under
local, state, or federal statutes, ordinances, codes, or regulations.
The term illicit discharge includes any non-stormwater discharge,
except authorized non-stormwater discharges; conditionally exempt
non-stormwater discharges; and nonstormwater discharges resulting
from natural flows specifically identified in the MS4 Permit.
"Illicit disposal"
means any disposal, either intentionally or unintentionally,
of material(s) or waste(s) that can pollute stormwater or authorized
or conditionally exempt non-stormwater.
"Impervious surface"
means any man-made or modified surface that prevents or significantly
reduces the entry of water into the underlying soil, resulting in
runoff from the surface in greater quantities and/or at an increased
rate, when compared to natural conditions prior to development. Examples
of places that commonly exhibit impervious surfaces include parking
lots, driveways, roadways, storage areas, and rooftops. The imperviousness
of these areas commonly results from paving, compacted gravel, compacted
earth, and oiled earth.
"Industrial park"
means land development that is set aside for industrial development.
Industrial parks are usually located close to transport facilities,
especially where more than one transport modalities coincide: highways,
railroads, airports, and navigable rivers. It includes office parks,
which have offices and light industry.
"Infiltration BMP"
means a LID BMP that reduces stormwater runoff by capturing
and infiltrating the runoff into in-situ soils or amended on-site
soils. Examples of infiltration BMPs include infiltration basins,
dry wells, and pervious pavement.
"Linear Underground/Overhead Project (LUP)"
means those activities necessary for the installation of
underground and overhead linear facilities (e.g., conduits, substructures,
pipelines, towers, poles, cables, wires, connectors, switching, regulating
and transforming equipment and associated ancillary facilities) and
include, but are not limited to, underground utility mark-out, potholing,
concrete and asphalt cutting and removal, trenching, excavation, boring
and drilling, access road and pole/tower pad and cable/wire pull station,
substation construction, substructure installation, construction of
tower footings and/or foundations, pole and tower installations, pipeline
installations, welding, concrete and/or pavement repair or replacement,
and stockpile/borrow locations.
"Municipal Separate Storm Sewer System (MS4)"
means a conveyance or system of conveyances (including roads
with drainage systems, municipal streets, catch basins, curbs, gutter,
ditches, man-made channels, or storm drains) (40 CFR Section 122.26(b)(8))
that is:
1.
Owned or operated by a state, city, town, borough, county, parish,
district, association, or other public body (created by or pursuant
to state law) having jurisdiction over disposal of sewage, industrial
wastes, stormwater, or other wastes, including special districts under
state law such as a sewer district, flood control district or drainage
district, or similar entity, or an Indian tribe or an authorized Indian
tribal organization, or a designated and approved management agency
under Section 208 of the CWA that discharges to waters of the United
States;
2.
Designed or used for collecting or conveying stormwater; and
3.
Which is not part of a Publicly Owned Treatment Works (POTW)
as defined at 40 CFR Section 122.2.
"National Pollutant Discharge Elimination System (NPDES)"
means the national program for issuing, modifying, revoking,
and reissuing, terminating, monitoring, and enforcing permits, and
imposing and enforcing pretreatment requirements, under CWA Sections
307, 402, 318, and 405. The term includes an "approved program."
"Natural drainage system"
means a drainage system that has not been improved (e.g.,
channelized or armored). The clearing or dredging of a natural drainage
system does not cause the system to be classified as modified as defined
in Hydromodification.
"New development"
means land disturbing activities; structural development,
including construction or installation of a building or structure,
creation of impervious surfaces; and land subdivision.
"Nuisance"
means anything that meets all of the following requirements:
(1) is injurious to health, or is indecent or offensive to the senses,
or an obstruction to the free use of property, so as to interfere
with the comfortable enjoyment of life or property; (2) affects at
the same time an entire community or neighborhood, or any considerable
number of persons, although the extent of the annoyance or damage
inflicted upon individuals may be unequal; (3) occurs during, or as
a result of, the treatment or disposal of wastes, including stormwater.
"Parking lot"
means land area or facility for the parking or storage of
motor vehicles used for businesses, commerce, industry, or personal
use, with a lot size of 5,000 square feet or more of surface area,
or with 25 or more parking spaces (Source: Order No. R4-2012-0175).
"Person"
means any individual, partnership, co-partnership, firm,
company, corporation, association, joint stock company, trust, state,
governmental entity or any other legal entity, or their legal representatives,
agents, or assigns. The masculine gender shall include the feminine
and the singular shall include the plural where indicated by the context.
"Planning priority projects"
means development projects subject to permittee conditioning
and approval for the design and implementation of post-construction
controls to mitigate stormwater pollution, prior to completion of
the project(s).
"Pollutant"
means any "pollutant" defined in Section 502(6) of the Federal
Clean Water Act or incorporated into the California
Water Code Sec.
13373. Pollutants may include, but are not limited to, the following:
1.
Commercial and industrial waste (such as fuels, solvents, detergents,
plastic pellets, hazardous substances, fertilizers, pesticides, slag,
ash, and sludge);
2.
Metals (such as cadmium, lead, zinc, copper, silver, nickel,
chromium, and non- metals such as phosphorus and arsenic);
3.
Petroleum hydrocarbons (such as fuels, lubricants, surfactants,
waste oils, solvents, coolants, and grease);
4.
Excessive eroded soil, sediment, and particulate materials in
amounts that may adversely affect the beneficial use of the receiving
waters, flora, or fauna of the state;
5.
Animal wastes (such as discharge from confinement facilities,
kennels, pens, recreational facilities, stables, and show facilities);
6.
Substances having characteristics such as pH less than six or
greater than nine, or unusual coloration or turbidity, or excessive
levels of fecal coliform, or fecal streptococcus, or enterococcus.
"Pollution prevention"
means any action that causes a net reduction in the use or
generation of a hazardous substance or other pollutant that is discharged
into water and includes, but is not limited to, input change, operational
improvement, production process change, and product reformulation
(as defined in
Water Code Section 13263.3).
"Project"
means all development, redevelopment, and land disturbing
activities. The term is not limited to "project" as defined under
CEQA (Pub. Resources Code Section 21065).
"Rain event"
means any rain event greater than 0.1 inch in 24 hours except
where specifically stated otherwise.
"Rainfall harvest and use"
means a LID BMP system designed to capture runoff, typically
from a roof but can also include runoff capture from elsewhere within
the site, and to provide for temporary storage until the harvested
water can be used for irrigation or non-potable uses. The harvested
water may also be used for potable water uses if the system includes
disinfection treatment and is approved for such use by the local building
department.
"Receiving water"
means "water of the United States" into which waste and/or
pollutants are or may be discharged.
"Redevelopment"
includes, but is not limited to, the following: the expansion
of a building footprint; addition or replacement of a structure; replacement
of impervious surface area that is not part of a routine maintenance
activity; and land disturbing activities related to structural or
impervious surfaces. It does not include routine maintenance to maintain
original line and grade, hydraulic capacity, or original purpose of
facility, nor does it include emergency construction activities required
to immediately protect public health and safety.
"Regional Board"
means the California Regional Water Quality Control Board,
Los Angeles Region.
"Restaurant"
means establishments primarily engaged in the retail sale
of prepared food and drinks for onpremises or immediate consumption.
Caterers and industrial and institutional food service establishments
are also included in this industry (SIC Code 5812).
"Retail gasoline outlet"
means any facility engaged in selling gasoline and lubricating
oils (SIC 5541 and NAICS 447110 and 447190).
Routine maintenance.
"Routine maintenance" projects include, but are not limited
to, the following:
1.
Activities to maintain the original line and grade, hydraulic
capacity, or original purpose of the facility.
2.
As needed restoration work to preserve the original design grade,
integrity and hydraulic capacity of flood control facilities.
3.
Road shoulder work, regrading dirt or gravel roadways and shoulders
and performing ditch cleanouts.
4.
Updating existing lines* and facilities to comply with applicable
codes, standards, and regulations regardless of whether such projects
result in increased capacity.
5.
Leak repair.
"Routine maintenance" does not include construction of new**
lines or facilities resulting from compliance with applicable codes,
standards, and regulations.
|
*
|
Includes replacing existing lines with new materials or pipes.
|
**
|
New lines are those that are not associated with existing facilities
and are not part of a project to update or replace existing lines.
|
"Runoff"
means any runoff including stormwater and non-stormwater
from a drainage area that reaches a receiving water body.
"Sidewalk rinsing"
means low-volume pressure washing of paved pedestrian walkways
with average water usage of 0.006 gallons per square foot, with no
cleaning agents, and proper disposal of all debris collected.
"Site"
means land or water area where any "facility or activity"
is physically located or conducted, including adjacent land used in
connection with the facility or activity.
"Source control BMP"
means any schedules of activities, prohibitions of practices,
maintenance procedures, managerial practices, or operational practices
that aim to prevent stormwater pollution by reducing the potential
for contamination at the source of pollution.
"Storm drain system"
means any facilities or any part of those facilities, including
streets, gutters, conduits, natural or artificial drains, channels,
and watercourses that are used for the purpose of collecting, storing,
transporting, or disposing of stormwater and are located within the
City of Claremont.
"Storm Water Pollution Prevention Plan (SWPPP)"
means a plan, as required by a state general permit for discharges
of stormwater (e.g., construction general permit or industrial general
permit), identifying potential pollutant sources and describing the
design, placement, and implementation of BMPs, to effectively prevent
non-stormwater discharges and reduce pollutants in stormwater discharges
from activities covered by the general permit.
"Storm water or stormwater"
means water that originates from atmospheric moisture (rain
or snow) and that falls onto land, water, or other surfaces. Without
any change in its meaning, this term may be spelled or written as
one word or two separate words.
"Stormwater runoff"
means the part of precipitation (rainfall or snowmelt) that
travels across a surface to the storm drain system or receiving waters.
"SUSMP"
means the Los Angeles Countywide Standard Urban Stormwater
Mitigation Plan. The SUSMP was required as part of the previous municipal
NPDES permit (Order No. 01-182, NPDES No. CAS004001) and required
plans that designate best management practices (BMPs) that must be
used in specified categories of development projects.
"Treatment control BMP"
means any engineered system designed to remove pollutants
by simple gravity settling of particulate pollutants, filtration,
biological uptake, media absorption or any other physical, biological,
or chemical process.
"Urban runoff"
means surface water flow produced by storm and non-storm
events. Non-storm events include flow from residential, commercial,
or industrial activities involving the use of potable and non-potable
water.
(14-05; 22-01)