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.
"Act or Clean Water Act (CWA)"
means the Federal Water Pollution Control Act, also known as the Clean Water Act as amended, 33 U.S.C. 1251, et seq.
"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.
"General Construction Activities Storm Water Permit (GCASP)"
means the general NPDES permit adopted by the State Board which authorizes the discharge of stormwater from construction activities under certain conditions.
"General Industrial Activities Storm Water Permit (GIASP)"
means the general NPDES permit adopted by the State Board which authorizes the discharge of stormwater from certain industrial activities under certain conditions.
"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.
"Hazardous material(s)"
means any material(s) defined as hazardous by Division 20, Chapter 6.95 of the California Health and Safety Code.
"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.
"Low Impact Development (LID)"
means building and landscape features designed to retain or filter stormwater runoff.
"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.
"Non-stormwater discharge"
means any discharge to a municipal storm drain system that is not composed entirely of stormwater.
"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)
A. 
Short Title. The ordinance codified in this chapter shall be known as the "Stormwater and Runoff Pollution Control Ordinance" and may be referred to as such.
B. 
Purpose and Intent. The purpose of this chapter is to protect the health and safety of the residents of the City by protecting the beneficial uses, marine habitats, and ecosystems of receiving waters from pollutants carried by stormwater and non-stormwater discharges. The intent of this chapter is to enhance and protect the water quality of receiving waters consistent with the Act.
C. 
Applicability of this Chapter. The provisions of this chapter shall apply to the discharge, deposit, addition, or disposal of any non-stormwater, stormwater and/or runoff to the storm drain system and/or receiving waters within the City of Claremont.
D. 
Standards, Guidelines, and Criteria. The Director may establish uniform minimum standards, guidelines, and/or criteria for specific discharges, connections and/or BMPs. The provisions of this section shall not prohibit the Director from requiring a discharger or permittee from taking additional measures to achieve the objectives of this chapter or any permit.
(14-05; 22-01)
A. 
Except as otherwise conditionally authorized by the permit or any other NPDES permit, waiver or waste discharge order issued by the U.S. EPA, the State Board, or a Regional Board, provided that the discharger is in full compliance with all requirements of the permit, waiver or order and other applicable laws and regulations, including the provisions of this chapter, and subject to any requirements specified by the Director, no person shall do the following:
1. 
Discharge non-stormwater to the City's storm drain system or to receiving waters except in compliance with the requirements of this chapter;
2. 
Cause, allow, or facilitate any prohibited discharge; and
3. 
Discharge, cause, allow, or facilitate any discharge that may cause or threaten to cause a condition of pollution or nuisance as defined in Water Code Section 13050, that may cause, threaten to cause or contribute to an exceedance of any water quality standard in any Statewide Water Quality Control Plan, California Toxics Rule, or Basin Plan, or that may cause or contribute to the violation of any receiving water limitation.
B. 
Pursuant to the permit, discharges which may be conditionally authorized subject to best management practices and other restrictions or prohibitions determined by the Director include, but are not limited to, the following types of discharges:
1. 
Authorized non-stormwater discharges separately regulated by an individual or general NPDES permit;
2. 
Authorized non-stormwater discharges separately regulated by a conditional waiver or WDRs for agricultural lands;
3. 
Temporary non-stormwater discharges authorized pursuant to Sections 104(a) or 104(b) of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) that either: (a) will comply with water quality standards as applicable or relevant and appropriate requirements (ARARs) under Section 121(d)(2) of CERCLA; or (b) are subject to either: (i) a written waiver of ARARs pursuant to Section 121(d)(4) of CERCLA; or (ii) a written determination that compliance with ARARs is not practicable considering the exigencies of the situation pursuant to 40 CFR. Section 300.415(j);
4. 
Authorized non-stormwater discharges from emergency firefighting activities (i.e., discharges resulting from water use necessary for the protection of life or property from fire);
5. 
Natural flows to include the following:
a. 
Natural springs;
b. 
Flows from riparian habitats and wetlands;
c. 
Diverted stream flows, authorized by the State Water Board or Los Angeles Water Board;
d. 
Uncontaminated ground water infiltration; and
e. 
Rising ground waters, where ground water seepage is not otherwise covered by a NPDES permit.
6. 
Conditionally exempt non-stormwater discharges as follows:
a. 
Conditionally exempt essential non-stormwater discharges, to include the following:
i. 
Discharges from essential non-emergency firefighting activities.
ii. 
Discharges from drinking water systems that are not otherwise regulated by an NPDES permit.
b. 
Conditionally exempt non-essential non-stormwater discharges to include:
i. 
Dewatering of lakes;
ii. 
Landscape irrigation;
iii. 
Dechlorinated/debrominated swimming pool/spa discharges not otherwise regulated by a separate NPDES permit;
iv. 
Dewatering of decorative fountains;
v. 
Non-commercial car washing by residents or by non-profit organizations;
vi. 
Street/sidewalk wash water;
vii. 
Short-term releases of potable water with no additives or dyes for filming purposes; and
viii. 
Potable wash water used to clean reservoir covers.
c. 
Non-stormwater discharges to an ASBS are allowed as follows:
i. 
One of the conditionally exempt non-stormwater discharge categories in subparagraph (B)(6)(a) above.
ii. 
Essential for emergency response purposes, structural stability, and slope stability, which may include, but are not limited to, the following discharges:
(A) 
Discharges associated with emergency firefighting operations (i.e., discharges resulting from water use necessary for the protection of life or property from fire).
(B) 
Foundation and footing drains;
(C) 
Water from crawl space or basement pumps; and
(D) 
Hillside dewatering.
iii. 
Naturally occurring discharges as follows:
(A) 
Naturally occurring groundwater seepage via the MS4;
(B) 
Non-anthropogenic flows from a naturally occurring stream via a culvert or MS4, as long as there are no contributions of anthropogenic runoff.
C. 
The Director may limit or prohibit any discharge which is conditionally authorized by the permit if the discharge is a source of pollutants or causes or contributes to an exceedance of applicable receiving water limitations or water quality-based effluent limitations, including, but not limited to, imposing conditions on such discharge, requiring control measures and other actions to reduce pollutants, requiring diversion of the discharge to the sanitary sewer, or requiring pretreatment.
D. 
The Director may require any person to obtain a permit from the City before discharging or causing, allowing or facilitating any discharge to the storm drain system. It is unlawful to discharge, cause, allow, or facilitate any discharge to the storm drain system in violation of any permit so required.
E. 
Littering and other discharge of polluting or damaging substances are prohibited:
1. 
No person shall cause any refuse, rubbish, food waste, garbage, or any other discarded or abandoned objects to be littered, thrown, deposited, left, accumulated, maintained or kept in or upon any street, alley, sidewalk, storm drain, inlet, catch basin, conduit, drainage structure, place of business, or upon any public or private property so that the same may or does become a pollutant which may or does enter the storm drain system or receiving waters, except when such materials are placed in containers, bags, recycling bins, or other lawfully established waste disposal facilities protected from stormwater or runoff.
2. 
No person shall cause the disposal of hazardous materials or hazardous wastes into trash containers used for municipal trash disposal.
3. 
No person shall cause to be discharged to the storm drain system or to receiving waters any pesticide, fungicide, or herbicide prohibited by the U.S. EPA or the California Department of Pesticide Regulation.
4. 
No person shall cause the accumulation of pollutants, leaves, dirt, or other landscape debris into a street, alley, catch basin, culvert, curb, gutter, inlet, ditch, natural watercourse, flood control channel, canal, storm drain, or any fabricated or natural conveyance so that the same may or does become a pollutant which may or does enter the storm drain system or receiving waters.
5. 
No person shall cause the disposal of sanitary or septic waste or sewage into the storm drain system from any property or residence or any type of recreational vehicle, camper, bus, boat, holding tank, portable toilet, vacuum truck, or other mobile source of waste holding tank, container, or device.
6. 
No person shall discharge or cause to be discharged anything that would result in or contribute to a violation of the City's NPDES permit and any amendment, revision or re-issuance, thereof, either separately or when combined with other discharges.
(14-05; 22-01)
A. 
Installation or Use of Illicit Connections Prohibited. No person shall install, maintain or use any connection to the storm drain system or act, cause, permit or suffer any non-stormwater to be discharged or conveyed through a connection to the storm drain system unless the connection has been permitted by the Director. This prohibition is retroactive and applies to connections made in the past, regardless of whether made under a permit or other authorization, or whether permissible under the laws or practices applicable or prevailing at the time of the connection.
B. 
Removal of Illicit Connection from the Storm Drain System. If any person fails to remove an illicit connection upon notification by the Director, or upon revocation of a connection permit, the Director may remove such connection from the storm drain system pursuant to Section 8.28.060 of this chapter. The Director may pursue the recovery of costs for such removal pursuant to Section 8.28.060 of this chapter.
(14-05; 22-01)
A. 
Any person engaged in activities which will or may result in pollutants entering the City storm drain system shall undertake all control measures and BMPs as the Director may require to reduce such pollutants. Premises with a high potential threat of discharge may be required to implement a monitoring program meeting standards established by the City. Where best management practices guidelines or requirements have been adopted by any federal, state, regional, and/or city agency, for any activity, operation, or facility which may cause or contribute to stormwater pollution or contamination, illicit discharges, and/or discharges of non-stormwater to the storm drain system, every person undertaking such activity or operation, or owning or operating such facility shall comply with such guidelines or requirements as may be identified by the Director.
B. 
Installation of Structural BMPs. No person shall install a structural BMP for the purpose of treating, neutralizing, disposing of monitoring or diverting to the sanitary sewer system any runoff without the approval of the Director and of the Los Angeles County Sanitation District or any successor thereto. Such facilities may be subject to plan review, application, and issuance of operating permits pursuant to this Code.
C. 
BMPs to be Consistent with Environmental Goals. No person shall install or implement a BMP that transfers pollutants to air, groundwater, surface soils and/or other media in a manner inconsistent with applicable environmental laws and regulations.
D. 
The Director may require any person responsible for any industrial or commercial facility of new or redevelopment project to submit documentation demonstrating coverage by and compliance with any applicable permit, including copies of any notice of intent, stormwater pollution prevention plans, inspection reports, monitoring results, and other information deemed necessary to assess compliance with this chapter or any NPDES permit. Each discharger identified in an individual NPDES permit relating to stormwater discharges shall comply with and undertake all activities required by such permit.
E. 
The Director may require any person responsible for any industrial or commercial facility or new development or redevelopment project to enter into an agreement for the operation and maintenance of any structural control measures and to record such agreement with the County Recorder's office.
F. 
The following BMPs are required of every owner or occupant of any property:
1. 
No person shall leave, deposit, discharge, dump, or otherwise expose any chemical, fuel, animal waste, garbage, batteries and/or septic waste in an area where actual or potential discharge to the City streets or the storm drain system may occur. Any spills, discharge, or residues shall be removed as soon as possible and disposed of properly.
2. 
Runoff from landscape irrigation, air conditioning condensate, water-line flushing, foundation/footing drains, individual residential car washing, dechlorinated/debrominated swimming pool/spa discharges and sidewalk washing shall be conducted in a manner which minimizes or eliminates the possibility of pollutant discharges reaching the City storm drain system or receiving waters.
3. 
Runoff from washing paved areas, including, but not limited to, parking lots, on industrial or commercial property is prohibited unless specifically required by federal, state, or local health or safety codes and not in violation of any other provision of this Code. Runoff from authorized washing of paved areas shall be minimized to the extent practicable.
4. 
Objects, such as motor vehicle parts containing grease, oil, or other hazardous materials, and unsealed receptacles containing hazardous materials, shall not be stored in area exposed to stormwater or otherwise susceptible to runoff.
5. 
Any machinery or equipment which is to be repaired or maintained in areas exposed to stormwater or otherwise susceptible to runoff shall be provided with containment areas to control leaks, spills, or discharges.
6. 
All motor vehicle parking lots with more than 25 parking spaces and located in areas exposed to stormwater or otherwise susceptible to runoff shall have debris removed by regular sweeping or other equally effective measures. Such debris shall be collected and properly disposed of.
7. 
Motor vehicle parking lots with a gravel/sediment base to implement BMPs to prevent the discharge of gravel and sediment to the MS4.
(14-05; 22-01)
A. 
The Director may require any person discharging or causing, allowing, or facilitating a discharge to the storm drain system or receiving waters to take any or all of the following actions:
1. 
To submit information necessary to comply with the permit or to confirm that person's compliance with this chapter;
2. 
To monitor discharges and submit reports of discharge activities;
3. 
To maintain records of monitoring and discharging; and
4. 
To take any other action necessary to comply with the permit or this chapter.
B. 
Notwithstanding any other requirement of law, any known or suspected release of materials, pollutants, or waste, which may result in pollutants or non-stormwater discharges entering stormwater, the storm drain system or waters of the state or United States, shall be reported immediately in the following manner by any person in charge of a premises or responsible for the premises' emergency response:
1. 
The release of a hazardous material shall be immediately reported to emergency services by emergency dispatch services (911).
2. 
The release of a nonhazardous material shall be reported as follows:
a. 
To the Director during normal business hours (Monday through Thursday 7:00 a.m.—6:00 p.m.) and to the Claremont Police Department after hours on the same business day;
b. 
If the release occurs after 6:00 p.m. on a weekday, on a weekend or holiday, to the Claremont Police Department on the same day and to the Director by telephone on the next business day; and
c. 
A written notification of the release shall also be made to the Director within ten business days of release. A copy of the written notice shall be retained at the premises for at least three years. The notification shall include a detailed written report describing the cause of the discharge, corrective action taken and measures to be taken to prevent future occurrences, and measures taken to remediate the effects of the discharge. Such notification shall not relieve the discharger or permittee from liability or fines incurred as a result of the uncontrolled discharge.
3. 
In addition to the above requirements, the release of any hazardous materials or substances, sewage, oil, or petroleum to any waters of the state, or discharged to deposited where it is or probably will be in discharged in or on any waters of the state, shall be reported to the State Office of Emergency Services, as required by Sections 1327 and 13272 of California Water Code.
(14-05; 22-01)
A. 
Prohibited Discharges from Industrial or Commercial Activity. Any person subject to an industrial or construction activity NPDES stormwater discharge permit shall comply with all provisions of such permit. The following discharges from industrial or commercial activities are prohibited unless the discharge is in compliance with a NPDES permit:
1. 
Discharge of wash waters to the storm drain system from the cleaning of gas stations, auto repair garages, or other types of auto repair facilities;
2. 
Discharge of wastewater to the storm drain system from mobile auto washing, steam cleaning, mobile carpet cleaning, or other such mobile commercial and industrial operations;
3. 
Discharge to the storm drain system from areas where repair of machinery and equipment, including motor vehicles, which are visibly leaking oil, fluids or coolants is undertaken;
4. 
Discharge to the storm drain system from storage areas for materials containing grease, oil, or hazardous materials, or from uncovered receptacles containing hazardous materials, grease, or oil;
5. 
Discharge of commercial/public swimming pool filter backwash to the storm drain system;
6. 
Discharge from the washing of toxic materials from paved or unpaved areas to the storm drain system;
7. 
Discharge from the washing out of concrete trucks to the storm drain system; and
8. 
Discharge from the washing or rinsing of restaurant mats, equipment, or garbage bins or cans in such a manner that causes non-stormwater to enter the storm drain system.
B. 
Industrial/Commercial Facility Sources Required to Obtain a NPDES Permit. Any industrial or commercial facility required to have a NPDES permit shall retain on site and upon request, make immediately available to the Director the following documents as evidence of compliance with permit requirements, as applicable:
1. 
A copy of a NPDES permit or notice of intent to comply with a general permit to discharge stormwater associated with industrial or construction activity as submitted to the State Board or report of waste discharge as submitted to a Regional Board of jurisdiction;
2. 
A waste discharge identification number issued by the State Board or copy of the NPDES permit issued by a Regional Board;
3. 
A SWPPP and a monitoring program plan or group monitoring plan;
4. 
Stormwater quality data;
5. 
Evidence of facility self-inspection; or
6. 
Evidence that facilities has filed a notice of non-applicability (NONA) or any applicable waiver issued by the Los Angeles Water Board or State Water Board pertaining to stormwater discharges.
C. 
Best management practices for industrial and commercial facilities. All industrial and commercial facilities shall implement BMPs which will effectively prevent the direct or indirect discharge of pollutants to the storm drain system or receiving waters to the maximum extent practicable. Minimum BMPs applicable to all industrial and commercial facilities include, but are not limited to the following:
1. 
Termination of all non-stormwater discharge to the storm drain system that is not specifically authorized by a NPDES permit;
2. 
Exercising general good housekeeping practices;
3. 
Incorporating regular scheduled preventative maintenance into operations;
4. 
Maintaining spill prevention and control procedures;
5. 
Implementing soil erosion control;
6. 
Posting on-site private storm drains to indicate that they are not to receive liquid, solid wastes or pollutants;
7. 
Implementing regular cleaning of the on-site private storm drain system;
8. 
Ensuring that stormwater runoff is directed away from operating, processing, fueling, cleaning and storage areas;
9. 
Remove trash, debris, and free-standing oil/grease, spill/leaks from sidewalks and hard surfaces; and
10. 
Sidewalk washing should be performed using high pressure, low-volume spray washing using only potable water with no cleaning agents at an average usage of 0.006 gallons per square feet of sidewalk area.
(14-05; 22-01)
A. 
Public Facility Sources Required to Obtain a NPDES Permit. Any public facility required to have a NPDES permit shall retain on site and, upon request, make immediately available to the Director the following documents as evidence of compliance with permit requirements, as applicable:
1. 
A copy of an NPDES permit or notice of intent to comply with a general permit to discharge stormwater associated with industrial or construction activity as submitted to the State Board or report of waste discharge submitted to a Regional Board of jurisdiction;
2. 
A waste discharge identification number issued by the State Board or copy of the NPDES permit issued by a Regional Board;
3. 
A SWPPP and a monitoring program plan or group monitoring plan;
4. 
Stormwater quality data;
5. 
Evidence of facility self-inspection; or
6. 
If applicable, evidence that the facility has filed a Notice of Non-Applicability (NONA) or applicable waiver issued by the Los Angeles Water Board or State Water Board pertaining to stormwater discharges.
(14-05; 22-01)
A. 
Stormwater and Runoff Pollution Mitigation for Construction Activity. No person shall commence any construction activity for which a permit is required by this chapter or any law or regulation without implementing all stormwater and runoff pollution mitigation measures required by such permit(s), law, regulation, or this chapter. In addition to any other requirements set forth in this chapter, prior to obtaining a grading or building permit, each operator of any construction activity shall submit evidence to the Director that all applicable permits have been obtained, including but not limited to the General Construction Activities Storm Water Permit and State Water Board 401 Water Quality Certification.
B. 
No grading permit shall be issued for any development with a disturbed area of one acre or greater or which is part of a larger common plan of development unless the applicant can show that: (1) a notice of intent to comply with the State Construction Activity Storm Water Permit has been filed; (2) a Storm Water Pollution Prevention Plan (SWPPP) has been prepared; and (3) a post-construction SWPPP meeting the low-impact development standards in Chapter 8.28.041.
C. 
Prior to obtaining a grading or building permit, each operator of any construction site less than one acre shall cause to be prepared and submitted to the City a plan to: control erosion and sediment, prevent erosion, sediment loss, and the discharge of construction wastes.
D. 
The following minimum set of BMPs shall apply to all construction sites:
1. 
Site management – housekeeping;
2. 
Erosion controls – scheduling and preservation of existing vegetation;
3. 
Sediment controls – perimeter controls and stabilized construction site entrance/exit;
4. 
Non-stormwater management – water conservation practices and dewatering operations;
5. 
Waste management – material delivery and storage; stockpile management; solid waste management; concrete waste management; and sanitary/septic waste management.
E. 
The following minimum BMPs are required for both private or public roadway paving or repair operations:
1. 
Restrict paving and repaving activities to exclude periods of rainfall or predicted rainfall unless required by emergency conditions.
2. 
Install gravel bags and filter fabric or other equivalent inlet protection at all susceptible storm drain inlets and at manholes to prevent spills of paving products and tack coat.
3. 
Prevent the discharge of release of agents including soybean oil, other oils, or diesel to the asphalt.
4. 
Minimize non-stormwater runoff from water use for roller equipment and for evaporative cooling of the asphalt.
5. 
Clean equipment over absorbent pads, drip pans, plastic sheeting or other materials to capture all spillage and dispose properly.
6. 
Collect liquid waste in a container, with a secure lid, for transport to a maintenance facility to be reused, recycled, or disposed of properly.
7. 
Collect solid waste by vacuuming or sweeping and securing in an appropriate container for transport to a maintenance facility to be reused, recycled, or disposed of properly.
8. 
Cover "cold-mix" asphalt with protective sheeting during a rainstorm.
9. 
Cover loads with tarp before haul-off to a storage site, and do not overload trucks.
10. 
Minimize airborne dust by using water spray or other approved dust suppressant during grinding.
11. 
Avoid stockpiling soil, sand, sediment, asphalt material and asphalt grindings materials or rubble in or near stormwater drainage systems or receiving waters.
12. 
Protect stockpiles with a cover or sediment barriers during rain.
(14-05; 22-01)
A. 
Prior to construction of a development equal to or greater than 300 square feet, new development/redevelopment project (as defined in this chapter) such project shall be evaluated by the City for its potential to discharge pollutants to the storm drain system or to receiving waters based on its intended land use. Such evaluation shall be conducted in accordance with development planning requirements established by the Regional Board or its Executive Officer, pursuant to the municipal NPDES permit. No discretionary permit may be issued for any construction or development project until the Director finds that the project plans comply with the LID/SUSMP requirements set forth in the permit and in this chapter.
B. 
Once a project has been evaluated for its potential to discharge pollutants to the storm drain system or receiving waters, the City shall require appropriate BMPs to be implemented during construction and following project completion. The prescription of BMPs shall be in keeping with the Low Impact Development design standards pursuant to the municipal NPDES permit and this chapter.
(14-05; 22-01)
A. 
The provisions of this section contain requirements for construction activities meeting the sizing thresholds of this chapter and new development /redevelopment projects to ensure that they comply with current "municipal NPDES permit" and the provisions of this chapter to lessen the water quality impacts of development by using smart growth practices, and integrate LID design principles to mimic predevelopment hydrology through infiltration, evapotranspiration and rainfall harvest and use. LID shall be inclusive of SUSMP requirements.
B. 
This section contains requirements for stormwater pollution control measures in development and redevelopment projects and authorizes the City of Claremont to further define and adopt stormwater pollution control measures, develop LID principles and requirements, including, but not limited to, the objectives and specifications for integration of LID strategies, alternative compliance for technical infeasibility from the requirements of the on-site retention requirements, and collect funds for projects that are granted alternative compliance for technical infeasibility. Except as otherwise provided herein, the City of Claremont shall administer, implement, and enforce the provisions of this section.
C. 
The following development and redevelopment projects, termed "planning priority projects," shall comply with the requirements of this section:
1. 
New development projects that are in any of the following categories:
a. 
Projects equal to one acre or greater of disturbed area and adding more than 10,000 square feet or more of impervious surface area (collectively over the entire project site).
b. 
Industrial parks of 10,000 square feet or more of surface area.
c. 
Commercial malls of 10,000 square feet or more of surface area.
2. 
Redevelopment projects that create and/or replace 5,000 square feet or more of impervious surfaces (collectively over the entire project site) on any of the following:
a. 
Existing sites of 10,000 square feet or more of impervious surface area.
b. 
Industrial parks 10,000 square feet or more of impervious surface area.
c. 
Commercial malls 10,000 square feet or more of impervious surface area.
3. 
New development and redevelopment projects that create and/or replace 5,000 square feet or more of impervious surfaces (collectively over the entire project site) and include one or more of the following uses:
a. 
Restaurants (SIC 5812).
b. 
Parking lots.
c. 
Automotive service facilities (SIC 5013, 5014, 5511, 5541, 7532-7534 and 7536-7539).
4. 
New development and redevelopment projects that create and/or replace 2,500 square feet or more of impervious area; discharge stormwater that is likely to impact a sensitive biological species or habitat; and are located in or directly adjacent to or are discharging to an ASBS, Sensitive Ecological Area in Los Angeles County.
5. 
Street and road construction of 10,000 square feet or more of impervious surface area, in addition to complying with the requirements of this section, shall also follow the City's Green Streets Policy (available on the City's website). Street and road construction applies to standalone streets, roads, highways, and freeway projects. Temporary access roads are not subject to this requirement.
D. 
The following construction projects are subject to the stormwater runoff mitigation requirements in this chapter:
1. 
The project will be built on a currently vacant and/or undeveloped parcel.
2. 
Projects that add and/or replace 50 percent of any impervious surface area with a total square footage of 300 square or greater.
3. 
Projects that will create a new detached structure that is 300 square feet in floor area or greater.
4. 
The project is located in or within 200 feet of an environmentally sensitive area.
E. 
The following considerations are applicable to redevelopment projects:
1. 
Where redevelopment results in an alteration of more than 50 percent of impervious surfaces of a previously existing development the entire project must be mitigated.
2. 
Where redevelopment results in an alteration of less than 50 percent of impervious surfaces of a previously existing development, only the alteration must be mitigated, and not the entire development.
3. 
Redevelopment does not include routine maintenance activities that are conducted to maintain original line and grade, hydraulic capacity, original purpose of facility or emergency redevelopment activity required to protect public health and safety. Impervious surface replacement, such as the reconstruction of parking lots and roadways which does not disturb additional area and maintains the original grade and alignment, is considered a routine maintenance activity. Redevelopment does not include the repaving of existing roads to maintain original line and grade.
F. 
Stormwater Pollution Control Requirements. Every applicable project shall be designed to control pollutants, pollutant loads, and runoff volume to the maximum extent feasible by minimizing impervious surface area and controlling runoff from impervious surfaces through infiltration, evapotranspiration, bioretention and/or rainfall harvest and use.
1. 
Projects that add and/or replace 300 square feet or more impervious surface shall complete the City of Claremont's low impact development worksheet (available on the City's website) and retain the 85th percentile 24-hour runoff event volume (as calculated on the worksheet).
2. 
Projects adding or replacing impervious surfaces greater than 300 square feet in area, but not meeting the planning priority project thresholds, shall complete the City of Claremont's LID worksheet (available on the City's website) and prepare a site-specific plan to address post-construction design, source and/or treatment control measures to mitigate specific stormwater pollutants where one or more of the following project characteristics exist:
a. 
Vehicle or equipment fueling;
b. 
Vehicle or equipment maintenance areas, including washing and repair;
c. 
Commercial or industrial waste handling or storage;
d. 
Outdoor handling or storage of hazardous materials;
e. 
Outdoor manufacturing areas;
f. 
Outdoor food handling or processing;
g. 
Outdoor animal care, confinement, or slaughter; or
h. 
Outdoor horticultural activities.
3. 
New single-family homes in the Hillside District or other new residential development on any property with greater than seven percent average slope, shall include mitigation measures to do the following:
a. 
Retain the 85th percentile 24-hour runoff event volume;
b. 
Conserve natural areas;
c. 
Protect slopes and channels;
d. 
Provide storm drain system stenciling and signage;
e. 
Divert roof runoff to vegetated areas before discharge unless the diversion would result in slope erosion or soil saturation that may lead to instability; and
f. 
Direct surface flow to vegetated areas before discharge, unless the diversion would result in slope erosion or soil saturation that may lead to instability.
4. 
Street and road construction of 10,000 square feet or more of impervious surface shall be in accordance with the City of Claremont's green street policy and the USEPA guidance regarding Managing Wet Weather with Green Infrastructure: Green Streets (December 2008 EPA-833-F-08-009) to the maximum extent practicable.
5. 
The remainder of planning priority projects shall prepare a LID Plan to comply with the following:
a. 
Retain and infiltrate stormwater runoff on site for the Stormwater Quality Design Volume (SWQDv) defined as the runoff from the 85th percentile 24-hour runoff event; or bioretention and/or rainfall harvest and use of the SWQDv. If partial or complete on-site retention is technically infeasible, the project site may biofiltrate 1.5 times the portion of the remaining SWQDv that is not reliably retained on site. biofiltration BMPs must adhere to the design specifications provided in the Los Angeles County LID Manual.
b. 
Additional alternative compliance options such as off-site infiltration may be available to the project site. The project site should contact the City of Claremont to determine eligibility.
6. 
The remaining SWQDv that cannot be retained or biofiltered on site must be treated on site to reduce pollutant loading. BMPs must be selected and designed to meet pollutant-specific benchmarks as required per the municipal NPDES permit. Flow-through BMPs may be used to treat the remaining SWQDv and must be sized based on a rainfall intensity:
a. 
0.2 inches per hour for each hour of a storm event; or
b. 
The maximum flow rate of runoff produced by the 85th percentile hourly rainfall intensity for each hour of the storm event, as determined by historical rainfall records, multiplied by a factor of two.
G. 
A multi-phased project shall comply with the standards and requirements of this section for all of its phases by: (1) designing a system acceptable to the City of Claremont to satisfy these standards and requirements for the entire Site during the first phase; and (2) implementing these standards and requirements for each phase of development or redevelopment of the site during the first phase or prior to commencement of construction of a later phase, to the extent necessary to treat the stormwater from such later phase. For purposes of this section, "multi-phased project" shall mean any planning priority project implemented over more than one phase and the site of a multi-phased project shall include any land and water area designed and used to store, treat, or manage stormwater runoff in connection with the development or redevelopment, including any tracts, lots, or parcels of real property, whether developed or not, associated with, functionally connected to, or under common ownership or control with such development or redevelopment.
H. 
Hydromodification Management Requirements. Planning priority projects located within natural drainage systems shall implement hydrological control measures to prevent accelerated downstream erosion and protect stream habitat.
1. 
Natural drainage systems that are subject to the hydromodification assessments and control include all drainages that have not been modified using engineering controls or drainages that are tributary to a natural drainage system. Examples of engineering modifications to a drainage include channelization, armoring with concrete, and application of rip-rap.
2. 
At the City of Claremont's discretion, the following new development and redevelopment projects may be exempted from implementation of hydromodification controls where it has been documented that adverse hydromodification effects to natural drainage systems are unlikely:
a. 
Projects consisting of replacement, maintenance, or repair of an existing flood control facility, storm drain, or transportation network.
b. 
Redevelopment projects in the urban core that do not increase the effective impervious area or decrease the infiltration capacity of pervious areas compared to pre-project conditions.
c. 
Projects that have any increased discharge directly or via a storm drain to a sump, lake, into a waterway that has a 100-year peak flow (Q100) of 25,000 cubic feet per second or more, or other receiving water that is not susceptible to hydromodification impacts.
d. 
Projects that discharge directly or via a storm drain into concrete or otherwise engineered channels, which in turn, discharge into a receiving water that is not susceptible to hydromodification impacts.
e. 
LID BMPs implemented on single-family homes are sufficient to comply with the hydromodification criteria.
3. 
Projects disturbing an area less than or equal to one acre shall implement the LID control standards in subsection (F)(5) of this section.
4. 
Projects disturbing an area greater than 1 acre, but less than 50 acres will be presumed to meet predevelopment hydrology if one of the following demonstrations are made:
a. 
The project is designed to retain on site the runoff of the 95th percentile 24-hour storm; or
b. 
The runoff flow rate, volume, velocity, and duration of the post-development condition does not exceed the pre-development condition for the two-year, 24-hour storm event; or
c. 
The erosion potential (Ep) in the receiving water is approximately one. Ep shall be determined in accordance with the NPDES permit.
5. 
Projects disturbing 50 acres or more will be presumed to meet pre-development hydrology based on the successful demonstration of one of the following conditions:
a. 
The project site infiltrates on-site runoff from a two-year, 24-hour storm event; or
b. 
The runoff flow rate, volume, velocity, and duration for the post-development condition does not exceed the pre-development condition for the two-year, 24-hour storm event. These conditions must be substantiated by hydrologic modeling.
I. 
All City of Claremont departments engaged in capital improvement projects or construction projects shall establish administrative procedures necessary to implement the provisions of this article on their development and redevelopment projects and report their activities annually to the Director of Community Development.
J. 
Certification. As a condition for issuing a certificate of occupancy for a new development or redevelopment project the Director, shall require the applicant, facility operator(s) and/or owner(s), as appropriate, to construct and/or employ all stormwater control BMPs identified in the approved Low Impact Development Plan documents and/or Low Impact Development Worksheet and submit a signed certification state that the project site and all BMPs will be employed and maintained in compliance with the City's LID ordinance and other applicable regulatory requirements until the responsibility for such maintenance is legally transferred.
K. 
Project applicants shall certify annually that all BMPs identified in the approved Low Impact Development Plan documents and/or Low Impact Development Worksheet have been inspected and maintained, in accordance with the approved BMP maintenance plan and/or manufacturer's specifications. This certification shall be submitted to the City Engineer by September 30th annually.
L. 
The City of Claremont shall inspect planning priority projects once every two years after project completion of approved post-construction BMPs to assess operation conditions for post-construction treatment control and hydromodification control BMP repair, replacement, or re-vegetation.
M. 
Fees. City Council may establish fees for services provided under this chapter, as authorized under Section 66016 and 66018 of the California Government Code.
(14-05; 22-01)
A. 
Enforcement—Director's Powers and Duties. The Director shall have primary responsibility for the enforcement of the regulations in this chapter. The Director may enter into agreements with, and/or otherwise delegate its authority to, other departments for the purpose of implementing this chapter.
B. 
Identification for inspectors and maintenance personnel. The Director shall provide means of identification to inspectors and storm drain system maintenance personnel which shall identify them as such. Inspectors and storm drain system maintenance personnel shall identify themselves upon request in the performance of their duties under this chapter.
C. 
Obstructing Access to Facilities Prohibited. No object, whether a permanent structure, a temporary structure, or any object which is difficult to remove, shall be located on any storm drain easement or placed in such a position as to interfere with the ready and easy access to any facility conveying stormwater or runoff as described in this chapter unless authority is granted by the Director. Upon notification by the Director, any such obstruction shall be immediately removed by the responsible party at no expense to the City, and shall not be replaced.
D. 
Inspection to Ascertain Compliance—Access Required.
1. 
The Director may inspect in a manner authorized by law, as often as he or she deems necessary, any publicly or privately owned storm drain, storm drain connection, street, gutter, yard, plant, storage facility, building, BMP, NPDES permit, SWPPP, stormwater management plan, construction activity, or other facility to ascertain whether such facilities, plans, or protective measures are in place, maintained, and operated in accordance with the provisions of this chapter.
2. 
In the course of such inspection, the Director may do the following:
a. 
Inspect, sample, make flow measurements of any runoff, discharge, or threatened discharge;
b. 
Place on the premises devices for runoff or discharge sampling, monitoring, flow measuring, or metering;
c. 
Inspect, copy, or examine any records, reports, plans, test results, or other information required to carry out the provisions of this chapter, to the extent allowed by law; and
d. 
Photograph any materials, storage areas, waste, waste containers, BMP, vehicle, connection, discharge, runoff and/or violation discovered during an inspection.
E. 
Interference with Inspector Prohibited. No person shall, during reasonable hours, refuse, restrict, resist, or attempt to resist the entrance of the Director into any building, factory, plant, yard, construction project or other place, or portions thereof in the performance of his or her duty within the powers conferred upon him or her by law.
F. 
Notice to Correct Violations. Director may issue a notice of violation and order to comply to achieve compliance with the provisions of this chapter. Failure to comply with the terms and conditions for a notice of violation and order to comply shall constitute a violation of this chapter. If a person fails to comply with an order issued under this section to remove an illicit connection, obstruction or other encroachment to the storm drain system, the Director may perform the work as provided in subsection H of this section. The person responsible for installing or operating such a facility shall be liable to the City for the cost of such work, including reasonable attorney's fees and other costs of enforcement, to be recovered in a civil action in any court of competent jurisdiction.
G. 
Violation a Public Nuisance. Any discharge in violation of this chapter, any illicit connection, and/or any violation of runoff management requirements shall constitute a threat to public health and safety and is declared and deemed a public nuisance.
H. 
Nuisance Abatement Costs. Whenever a nuisance shall be found to exist on any premises, the Director may summarily abate such nuisance upon determination that the nuisance constitutes an immediate threat to public health or safety, or the Director may notify in writing the person(s) having control of or acting as agent for such premises to abate or remove such nuisance within such time as is stated on the notice. Upon the failure or refusal of such person(s) to comply with the notice, the Director may abate or remove such nuisance in the manner provided by this chapter, shall be liable to the City for any costs incurred by the City for such abatement, including reasonable attorney's fees and other costs of enforcement, to be recovered in a civil action in any court of competent jurisdiction.
I. 
Violation—Penalty. Any person violating any provision of this chapter shall be guilty of a misdemeanor. Such violation shall be punishable by a fine of not more than $1,000.00 or by imprisonment in the County Jail for a period not to exceed six months. Each day during any portion of which such violation is committed, continued, or permitted shall constitute a separate offense and shall be punishable as such.
J. 
Penalties Not Exclusive. Penalties under this chapter are in addition to, and do not supersede or limit, any and all other penalties or remedies provided by law.
K. 
Conflicts With Other Code Sections. The provisions of this chapter shall control over any inconsistent or conflicting provisions of this Code.
L. 
Severability. If any portion of this chapter or the application thereof to any person or circumstance is held invalid, the remainder of this chapter, and the application of such provisions to other persons or circumstances, shall not be affected thereby.
(14-05; 21-06; 22-01)